New OC HOC ME-OC - Asamiasami.lt/wp-content/uploads/OCEANs.pdf · 2017. 5. 11. · OPERATING AND MAINTENANCE MANUAL Quick guide OCT/ME-OCT 018÷600 1 ENGLISH EN The data in this manual

WATER CHILLERS

MAINTENANCE AND OPERATING MANUAL

OCT/ME-OCT 018÷600

38178801035Original instructions in Italian language

OPERATING AND MAINTENANCE MANUALQuick guide

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The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited.

QUICK GUIDEThe machines are equipped with an electronic control panel, which can be programmed by means of some buttons. It controls the operation of refrigerant circuits basing on the measured control parameters. Here below are indicated some basic instructions to start the unit. For further information consult " Electronic Board" chapter.

0 . 1 U n i t s w i t c h i n g o n a n d o f fATTENTION

Before switching on the unit be sure that all personnel have read and understood the Chapter 2 “Safety” of this manual.

Press the button for 5 seconds to start up the machine.The led of icon flashes for 5 seconds then it remains lit.

0 . 2 H o w t o p u t t h e u n i t i n s t a n d b yStand-by modality is obtained every time the unit is switched off.It is indicated by the symbol lit.Also in stand-by modality the controller can:

1. Display the measured values2. Manage the alarms by displaying and signalling.

0 . 3 D i s p l a y

The display is divided in 3 zones (for further information please consult 7.1 “User interface”).Upper-left zone: it displays the evaporator’s temperature.Lower-left zone: It displays the condensation temperature / pressure or the hour.Right zone: Signalling icons.

0 . 4 I n f o r m a t i o n a b o u t t h e s t a t u s o f t h e u n i t0.4.1 Display icons

ICON MEANING ICON MEANING

Celsius degrees (If displayed) Low pressure alarm

Fahrenheit degrees (If not displayed) Antifreeze resistance

Bar/Psi Pump ON

Compressor 1 Flow meter alarm

Compressor 2 Time to defrost starting (hour)

Stand-by unit Fan ON

General alarm Indication for Function Menu entering

High pressure alarm

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0.4.2 Symbols and leds on the display

0.4.3 Access to “Pr1” parameters (User level)To enter the menu of “Pr1” parameters which can be access by the user:

1. Press for some seconds + buttons ( and start flashing), in the upper part of the display appears “ALL”,the first group of parameters.

2. Select the various groups using and buttons.3. After selecting a group, press button: if the selected group is part of the selected menu or any parameter of this

group has been moved in this menu, in the lower part of the display it appears the “Label” and the code of thegroup’s first parameter present in “Pr1”, its value appears in the upper part of the display.It will not be possible to enter a parameter’s group which is not part of this menu.

4. It is possible to scroll or modify the parameters contained in the group.

0.4.4 How to modify a parameter’s value1. Enter the programming procedure.2. Select the desired parameter.3. Press button to enable the value’s adjustment.4. Modify the value by means of and buttons.5. Press to store the new value and to pass to the code of the following parameter.6. To exit the procedure: Press + when a parameter is displayed, or wait (about 240 seconds) without pressing

any button.

NOTEThe new value is stored also when the programming procedure is terminated for “time out”, without pressing button.

ATTENTION

It is possible to modify the value of parameters contained in CF group (Configuration parameters) only when unit is instand-by.

0 . 5 I n s t a l l a t i o n o f t h e M E - O C T e v a p o r a t i n g u n i tTo install the evaporating units follow the instructions in paragraph 5.8 “Cooling circuit connections only for evaporating ME-OCT units” and consult the enclosed diagram.

LED LED STATUS MEANING LED LED STATUS MEANING

Steady Unit on in heat pump modality Steady Defrosting enabled

Steady Unit on in chiller modality Unlit Defrosting disabled or terminated

FlashingProgramming phase (if flashes together with led)

Clock adjustment

Flashing Time to defrost starting

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INDEXQUICK GUIDE ................................................................................................................................................ 10.1 Unit switching on and off.............................................................................................................................. 10.2 How to put the unit in stand by ..................................................................................................................... 10.3 Display .......................................................................................................................................................... 10.4 Information about the status of the unit ........................................................................................................ 1

0.4.1 Display icons ....................................................................................................................................................... 10.4.2 Symbols and leds on the display ......................................................................................................................... 20.4.3 Access to “Pr1” parameters (User level) ........................................................................................................... 20.4.4 How to modify a parameter’s value .................................................................................................................... 2

0.5 Installation of the ME-OCT evaporating unit ............................................................................................... 2INDEX............................................................................................................................................................. 3

Chapter 1

GENERAL INFORMATION.............................................................................................................................. 61.1 Description .................................................................................................................................................... 61.2 How to interpret the model............................................................................................................................ 7

Chapter 2

SAFETY .......................................................................................................................................................... 82.1 General .......................................................................................................................................................... 82.2 General precautions....................................................................................................................................... 8

2.2.1 Liquids used in the circuit ................................................................................................................................... 82.2.2 Lifting and carriage precautions ........................................................................................................................ 92.2.3 Installation precautions .................................................................................................................................... 102.2.4 Precautions during operation ........................................................................................................................... 102.2.5 Disposal ............................................................................................................................................................ 102.2.6 Maintenance and repair precautions ................................................................................................................ 10

2.3 Refrigerant gases ......................................................................................................................................... 112.3.1 Refrigerant gas safety schedule ........................................................................................................................ 11

Chapter 3

TECHNICAL DATA ....................................................................................................................................... 133.1 Standard units performance OCT-MEOCT ................................................................................................ 14

3.1.1 Performance ...................................................................................................................................................... 143.1.2 Data concerning the hydraulic group kit (optional) ......................................................................................... 143.1.3 Sound Level Measurements .............................................................................................................................. 15

Chapter 4

DESCRIPTION .............................................................................................................................................. 164.1 Operating principle...................................................................................................................................... 164.2 Materials...................................................................................................................................................... 16

4.2.1 Structure and casing ......................................................................................................................................... 164.2.2 Compressors ..................................................................................................................................................... 164.2.3 Materials in contact with the liquid of the user circuit ..................................................................................... 174.2.4 Evaporators / Condensers ................................................................................................................................ 17

4.3 Refrigerant and hydraulic circuit................................................................................................................. 174.3.1 Water circuit ..................................................................................................................................................... 174.3.2 Hydraulic group kit (OPTIONAL) .................................................................................................................... 174.3.3 Cooling circuit (OCEAN TECH only) .............................................................................................................. 184.3.4 Evaporating version cooling circuit (ME-OCEAN TECH) .............................................................................. 18

4.4 Electrical circuit .......................................................................................................................................... 18Chapter 5

INSTALLATION ............................................................................................................................................ 195.1 Inspection .................................................................................................................................................... 195.2 Location....................................................................................................................................................... 195.3 Antifreeze protection................................................................................................................................... 205.4 Hydraulic connections................................................................................................................................. 205.5 Electrical Connections................................................................................................................................. 235.6 Phase Monitor ............................................................................................................................................. 24


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5.7 Probes positioning ME-OCEAN TECH ......................................................................................................255.8 Cooling circuit connections only for evaporating ME-OCT units ..............................................................25

Chapter 6

START UP .................................................................................................................................................... 26Chapter 7

ELECTRONIC BOARD.................................................................................................................................. 277.1 User interface ...............................................................................................................................................27

7.1.1 Display ...............................................................................................................................................................277.1.2 Display icons .....................................................................................................................................................27

7.2 Buttons function...........................................................................................................................................287.2.1 Function of combined buttons ...........................................................................................................................28

7.3 Symbols and leds on the display..................................................................................................................287.4 Remote terminal...........................................................................................................................................28

7.4.1 Function of buttons ............................................................................................................................................287.5 Displaying during an alarm..........................................................................................................................29

7.5.1 Alarm icons ........................................................................................................................................................297.6 How to silence the buzzer ............................................................................................................................297.7 First start up .................................................................................................................................................297.8 How to regulate the clock (NOT ENABLE IN THESE UNITS) ................................................................297.9 Programming by “Hot Key” ........................................................................................................................29

7.9.1 How to programme the unit by a programmed key (Download) ......................................................................297.9.2 How to store the parameters of the unit in the key “UPL” ...............................................................................30

7.10 Programming by keyboard...........................................................................................................................307.10.1 Access to “Pr1” parameters (User level) .........................................................................................................307.10.2 How to modify a parameter’s value ..................................................................................................................30

7.11 Values displayed ..........................................................................................................................................317.12 Unit switching on / off .................................................................................................................................317.13 How to put the unit in stand by....................................................................................................................317.14 Function menu ( button).........................................................................................................................32

7.14.1 Access to Function menu ...................................................................................................................................327.14.2 Exit Function menu ...........................................................................................................................................327.14.3 How to display the alarms “ALrM” ..................................................................................................................327.14.4 How to reset an alarm “rSt” .............................................................................................................................327.14.5 How to display the alarm historic “ALoG” ......................................................................................................327.14.6 How to reset the alarm history “ArSt” .............................................................................................................327.14.7 Displaying the operating hours of loads “C1Hr - C2Hr - PFHr” ...................................................................327.14.8 Reset of the heads operating hours ..................................................................................................................33

7.15 Other functions from keyboard....................................................................................................................337.15.1 How to display the Set Point .............................................................................................................................337.15.2 How to modify the Set Point ..............................................................................................................................33

7.16 Compressors unloading function .................................................................................................................347.17 Alarm codes and actions ..............................................................................................................................347.18 Outlet blocking ............................................................................................................................................377.19 Parameters description.................................................................................................................................38

7.19.1 Thermoregulation parameters ...........................................................................................................................387.19.2 Configuration parameters .................................................................................................................................387.19.3 Dynamic set point parameters (NOT ENABLED FUNCTION) ........................................................................427.19.4 Energy Saving parameters (NOT ENABLED FUNCTION) ..............................................................................427.19.5 Compressor parameters ....................................................................................................................................427.19.6 Ventilation parameters (NOT ENABLE FUNCTION) ......................................................................................427.19.7 Antifreeze support boiler resistance parameters (NOT ENABLE FUNCTION) ...............................................427.19.8 Defrosting parameters (NOT ENABLED FUNCTION) ....................................................................................427.19.9 Alarm parameters ..............................................................................................................................................427.19.10 LASER operating parameters (NOT ENABLE FUNCTION) ............................................................................42

7.20 Parameter setting..........................................................................................................................................437.20.1 Thermoregulation parameters ...........................................................................................................................437.20.2 Configuration parameters .................................................................................................................................437.20.3 Dynamic Set-Point Parameters (NOT ENABLE FUNCTION) .........................................................................457.20.4 Energy Saving Parameters (NOT ENABLE FUNCTION) ................................................................................457.20.5 Compressor parameters ....................................................................................................................................457.20.6 Fan parameters (NOT ENABLE FUNCTION) .................................................................................................457.20.7 Antifreeze resistance/supply parameters (NOT ENABLE FUNCTION) ...........................................................46


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7.20.8 Defrosting parameters (NOT ENBALE FUNCTION) ...................................................................................... 467.20.9 Alrm parameters ............................................................................................................................................... 467.20.10 LASER parameters (NOT ENABLE FUNCTION) ............................................................................................ 46

7.21 Probe description......................................................................................................................................... 46Chapter 8

OTHER COMPONENTS ................................................................................................................................. 478.1 Compressor integral protection (PI)............................................................................................................ 478.2 Refrigerant high and low pressure switches................................................................................................ 478.3 Pressure transducers .................................................................................................................................... 488.4 Water differential pressure switch............................................................................................................... 488.5 Water regulating valve (KIT)..................................................................................................................... 488.6 Modulating valve (KIT) .............................................................................................................................. 498.7 Safety valve (only OCT/ME-OCT 500÷600).............................................................................................. 50

Chapter 9

OPERATION AND MAINTENANCE................................................................................................................ 519.1 Operation..................................................................................................................................................... 519.2 Maintenance ............................................................................................................................................... 51

9.2.1 Access to the unit .............................................................................................................................................. 519.2.2 Water circuit emptying ...................................................................................................................................... 53

9.3 Maintenance schedule ................................................................................................................................. 54Chapter 10

TROUBLE SHOOTING................................................................................................................................... 55Chapter 11

RISK ANALYSIS: RESIDUAL RISK................................................................................................................ 59APPENDIX .................................................................................................................................................... 62

OPERATING AND MAINTENANCE MANUALGeneral information

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CHAPTER 1

GENERAL INFORMATION1 . 1 D e s c r i p t i o n

The machine described in this manual can be called “WATER CHILLERS” or “CHILLERS”.These units have been projected only for civil application and work to cool a liquid flow.It has been used high quality components and the process, from the design to the production and the checking of the machine, has been carried out in conformity with ISO 9001 standard.In these units is manly used water for the cooling cycle, so in the manual the term “WATER” will indicate any kind of liquid employed in the machine (e.g. a mixture of water and glycol). The term “PRESSURE”, used in than manual, indicates the gauge pressure. The following symbols are shown on the stickers on the unit as well as on the overall dimension drawing and refrigeration circuits in this manual.Here below their meaning:

The MODEL and the CODE of a unit are necessary to describe its components.

Machine water-inlet Machine water-outlet

Condensator water- inlet Condensator water-outlet

Indications for lifting the unit Direction of the refrigerant fluid

Risk of injury from sharp edges Risk of burns from contact with high-temperature surfaces

Hole for inserting bars for lifting the machine Electrocution risk

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1 . 2 H o w t o i n t e r p r e t t h e m o d e l

ATTENTION

This manual provides the user, installer and maintenance technician with all the technical information requiredfor installation, operation and carrying out routine maintenance operations to ensure long life.If spare parts are required, this must be original.Requests for SPARE PARTS and for any INFORMATION concerning the unit must be sent to the distributor or to the nearestservice centre, providing the MODEL and SERIAL NUMBER shown on the machine data plate and on the last page of thismanual.

MODEL DESCRIPTION

OCT x x xRated capacity of the compressor, multiplied for 10 and expressed in HP

OCEAN TECH model code

MODEL DESCRIPTION

ME OCT x x xRated capacity of the compressor, multiplied for 10 and expressed in HP

OCEAN TECH model code

Evaporating version

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CHAPTER 2

SAFETYATTENTION

This machinery was designed to be safe in the use for which it was planned provided that it is installed, started up andmaintained in accordance with the instructions contained in this manual.The manual must therefore be studied by all those who want to install, use or maintain the machinery.The machine contains electrical components which operate at the line voltage, and also moving parts, as fans and pumps. Itmust therefore be isolated from the electricity supply network before being opened.All maintenance operations which require access to the machinery must be carried out by expert or appropriately trainedpersons who have a perfect knowledge of the necessary precautions.There should not be children in the place of the installation.

2 . 1 G e n e r a lWhen handling or maintaining the unit and all auxiliary equipment, the personnel must operate with care observing all instructions concerning health and safety at installation site.Most accidents which occur during the operation and maintenance of the machinery are a result of failure to observe basic safety rules or precautions. An accident can often be avoided by recognising a situation that is potentially hazardous.The user should make sure that all personnel concerned with operation and maintenance of the unit and all auxiliary equipment have read and understood all warnings, cautions, prohibitions and notes written in this manual as well as on the unit.Improper operation or maintenance of the unit and auxiliary equipment could be dangerous and result in an accident causing injury or death.

ATTENTION

Do not operate the unit and auxiliary equipment until the instructions in the Operating section of this manual areunderstood by all personnel concerned.Do not carry out any servicing, repair or maintenance work on the unit and auxiliary equipment until the instructions in therelevant sections of this manual are clearly understood by all personnel concerned.

We cannot anticipate every possible circumstance which might represent a potential hazard. The warnings in this manual are therefore not all-inclusive. If the user employs an operating procedure, an item of equipment or a method of working which is not specifically recommended, he must ensure that the unit and auxiliary equipment will not be damaged or made unsafe and that there will be no risk to persons or property.Any improper use of the machine will relieve the manufacturer from any liability for possible personal injury or property damage.Arbitrary modifications made to the unit will automatically invalidate all forms of guarantee provided by the manufacturer.

ATTENTION

The hot / cold water produced by MTA units cannot be used directly for domestic hygiene or foodapplications. In the case of such applications, the installer is responsible for fitting an intermediateexchanger.If the intermediate exchanger is not fitted, the installer should affix a notice stating “non-drinking water”.

2 . 2 G e n e r a l p r e c a u t i o n s2.2.1 Liquids used in the circuit

The liquids utilized in the unit must be compatible with the materials of the hydraulic circuit of the machine.These can be water or mixtures of water and glycol.It is recommended to add anti-corrosive chemical additives to the water, and to work in a PH range between 7 and 8.Even in the case of glycol mixtures, the use of appropriate chemical additives (consult the glycol supplier) is very important to protect the unit materials from possible corrosion caused by the chemical degradation to which glycol is subject.If need be there should be losses of liquid, which contains dangerous substances (e.g. ethylene glycol). it must be collected, because it is dangerous for the environment.Furthermore, when the unit is no longer used, dangerous liquids must be disposed of by firms specialised and authorised for treating them.


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2.2.2 Lift ing and carriage precautionsAvoid injury by using a hoist to lift heavy loads. Check all chains, hooks, shackles and slings are in good condition and are of the correct capacity. They must be tested and approved according to local safety regulations. Cables, chains or ropes must never be applied directly to lifting eyes. Always use an appropriate shackle or hook properly positioned. Arrange lifting cables so that there are no sharp bends.Use a spreader bar to avoid side loads on hooks, eyes and shackles. When a load is on a hoist stay clear of the danger area beneath and around it. Keep lifting acceleration and speed within safe limits and never leave a load hanging on a hoist for longer than is necessary.The units must be handled in accordance with the plans shown in the annexed drawing.The manufacturer does not supply bars, belts and lifting hooks with the unit.OCT/ME-OCT 018÷150

OCT/ME-OCT 200÷600

MODEL D min L min

OCT/ME-OCT 018÷040 400 500

OCT/ME-OCT 050÷150 600 650

MODEL D min L min d min l min

OCT/ME-OCT 200÷350 600 1000 500 1200

OCT/ME-OCT 400÷600 600 1000 600 1200

L MIND MIN


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2.2.3 Instal lat ion precautionsInstallation work must be carried out by competent personnel under a qualified supervisor.The electrical supply line of the unit must be protected by equipment chosen and installed by the user as described in the wiring diagram as well as in the Chapter 5 “Installation”.If the unit is connected to a closed-type hydraulic circuit fitted with an automatic filling system, and the pressure of the filling system exceeds the maximum working pressure of the unit, it is necessary to install a pressure limiter device (e.g. a safety valve which operates at a lower pressure than the maximum working pressure of the machine, and located close to the input connection).All the piping of the cooled water or cooling water must be painted or clearly marked in compliance with the local safety provisions in the place of installation.On-off valves should be provided for the chiller so that the hydraulic circuit can be by-passed to carry out maintenance.All the electrical connections must comply with the local provisions in the place of installation.The machine and the auxiliary apparatus must be earthen and protected against short-circuits and overloading.If raised platforms are required to provide access to the unit they must not interfere with normal operation or obstruct access for lifting or dismantling components. Platforms and stairs should be of grid or plate construction with safety rails on all open sides.

2.2.4 Precautions during operationOperation must be carried out by competent personnel under a qualified supervisor.All stub pipes must be painted and clearly visible according to the local safety specifications.Do not remove or tempered with safety devices, protections or insulation materials of the machine or of the auxiliary apparatus.All electric connections must be in accordance with local safety specifications.The machine and the auxiliary apparatus must be earthen and protected against short-circuits and overloading.When mains power is switched on, lethal voltages are present in the electrical circuits and extreme caution must be exercised whenever it is necessary to carry out any work on the electrical system.Do not open the electric panel while it is under stress: do it only if it is necessary for testing or setting the machine.This work should be carried out by competent personnel under a qualified supervisor.

2.2.5 DisposalIf the product is scrapped, it must be disposed of in accordance with the environmental protection legislation in force in the country of use. The unit may include all or some of the materials listed below:

• refrigerant fluid R ... • Copper parts• Aluminium parts• Carbon Steel parts• Stainless Steel parts• PVC parts• CFC-free synthetic insulating material• Polystyrene parts• Polyester oil• Brass

2.2.6 Maintenance and repair precautionsMaintenance, overhaul and repair work must be carried out by competent personnel under a qualified supervisor.When refuse have to be discharged, be sure the they will not pollute the water and the air.Protect the environment by using only approved methods of disposal.If replacement parts are needed use only original spares.Keep a written record of all maintenance and repair work carried out on the unit and auxiliary equipment.The frequency and the nature of the work required over a period can reveal adverse operating conditions which should be corrected.Use only refrigerant gas specified on the specification plate of the unit.Make sure that all instructions concerning operation and maintenance are strictly followed and that the complete unit, with all accessories and safety devices, is kept in good working order.The accuracy of pressure and temperature gauges must be regularly checked.They must be renewed when acceptable tolerances are exceeded.Keep the machine clean at all times.Protect components and exposed openings by covering them, for example, with clean cloth or tape during maintenance and repair work.Do not weld or carry out any operation which produces heat near a system which contains oil or flammable liquids.The systems which may contain oil or flammable liquids must be completely drained and cleaned (with steam, for example), before carrying out these operations.Never weld, nor modify in any way, a vessel which may be put under pressure.To prevent an increase in working temperature, inspect and clean heat transfer surfaces (i.e. condenser fins) regularly.


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For every unit establish a suitable time schedule for cleaning operations.Avoid damage to safety valves and other pressure relief devices.Avoid plugging by paint, oil or dirt accumulation.Precautions must be taken when carrying out welding or any repair operation which generates heat, flames or sparks.The adjacent components must always be screened with non-flammable material and if the operation is to be carried out near any part of the lubrication system, or close to a component which may contain oil, the system must first be thoroughly purged, preferably by steam cleaning.Never use a light source with an open flame to inspect any part of the machine.Before dismantling any part of the unit ensure that all heavy movable parts are secured.When a repair has been completed, make sure no tools, loose parts or rags are left in, or on the machine.Check the direction of rotation of electric motors (fans, compressors and pump with three phase supply) when starting up the unit initially and after any work on the electrical connections or switch gear.All guards must be reinstated after carrying out repair or maintenance work.Do not use flammable liquid to clean any component during operation.If chlorinated hydrocarbon non-flammable fluids are used for cleaning, safety precautions must be taken against any toxic vapours which may be released.

ATTENTION

Before removing any protection panel from the power board or dismantling any of its parts, carry out the followingoperations:- Isolate the unit from the main electrical power supply.- Lock the isolator in the “OFF” position and remove the fuses (if they are present).- Attach a label to the isolator switch and display a panel carrying warning “WORK IN PROGRESS - DO NOT APPLYVOLTAGE”.- Do not switch on electrical power or attempt to start the unit if a warning label is attached.

Coloured tracers can be used in service-maintenance operations.Inspect all refrigerant circuit joints including connectors, flanges, and more generally all critical points (open joints) in order to prevent possible leakage of refrigerant gas.

2 . 3 R e f r i g e r a n t g a s e sR410Ais used to fill these units.Never attempt to mix refrigerant gases.To clean out a very heavily contaminated refrigerant system, e.g. after a refrigeration compressor burnout, a qualified refrigeration engineer must be consulted to carry out the task.The manufacturer's instructions and local safety regulations should always be observed when handling and storing high pressure gas cylinders.

2.3.1 Refrigerant gas safety schedule

Denomination: R410A (50% Difluoromethane (R32); 50% Pentafluoroethane (R125);INDICATION OF THE DANGERS

Major dangers: Asphyxia.Specific dangers: Rapid evaporation can cause freezing.

FIRST AID MEASURESGeneral information: Do not give anything to unconscious persons.Inhalation: Take the person outdoors.

Use oxygen or artificial respiration if necessary.Do not administer adrenaline or similar substances.

Contact with the eyes: Thoroughly wash with plenty of water for at least 15 minutes and call a doctor.Contact with the skin: Wash immediately with plenty of water.

Remove contaminated clothing immediately.FIRE-FIGHTING MEASURES

Means of extinction: Any means.Specific dangers: Pressure increase.Specific methods: Cool the containers with water sprays.


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MEASURES IN THE EVENT OF ACCIDENTAL LEAKAGEIndividual precautions: Evacuate personnel to safe areas.

Provide adequate ventilation.Use means of personal protection.

Environmental precautions: Evaporates.Cleaning methods: Evaporates.

HANDLING AND STORAGEHandlingtechnical measures/ precautions: Ensure sufficient air change and/or extraction in the work areas.recommendations for safe use: Do not inhale vapours or aerosols.Storage Close properly and store in a cool, dry well-ventilated place. Store in its original

containers. Incompatible products: explosives, flammable materials, organic peroxide.CONTROL OF EXPOSURE/INDIVIDUAL PROTECTION

Control parameters: AEL (8-h e 12-h TWA) = 1000 ml/m3 for each of the two components.Respiratory protection: For rescue and maintenance work in tanks, use autonomous breathing apparatus.

The vapours are heavier than air and can cause suffocation, reducing the oxygen available for breathing.

Protection of the eyes: Safety goggles.Protection of the hands: Rubber gloves.Hygiene measures: Do not smoke.

PHYSICAL AND CHEMICAL PROPERTIESColour: Colourless.Odour: Faint.Boiling point: -52.8°C at atm. press.Flammability point: Non flammable.Relative density: 1.08 kg/l at 25°C.Solubility in water: Negligible.

STABILITY AND REACTIVITYStability: No reactivity if used with the relative instructions.Materials to avoid: Highly oxidizing materials. Incompatible with: magnesium, zinc, sodium, potassium

and aluminium. Incompatibility increases if metal is in powder or surfaces have not been recently protected.

Hazardous decomposition products: These products are: halogen compounds, hydrofluoric acid, carbon oxide (CO, CO2), carbonyl halides.

TOXICOLOGICAL INFORMATIONAcute toxicity: (R32) LC50/inhalation/4 hours/lab. rats >760 ml/l

(R125) LC50/inhalation/4 hours/lab. rats >3480 mg/lLocal effects: Concentrations substantially above the TLV can cause narcotic effects.

Inhalation of products in decomposition can lead to respiratory difficulty (pulmonary oedema).

Long-term toxicity: Has not shown any cancerogenic, teratogenic or mutagenic effects in experiments on animals.

ECOLOGICAL INFORMATIONGlobal warming potential HGWP (R11=1):

1730

Ozone depletion potential ODP (R11=1):

0

Considerations on disposal: Usable with reconditioning.

OPERATING AND MAINTENANCE MANUALTechnical data

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CHAPTER 3

TECHNICAL DATAIn the plate on the machine you can see the main technical data:

ATTENTION

The performance of the chiller mainly depends on the flow and temperature of the water in the user circuit and on thetemperature of the thermal exchanger fluid of the condenser.These data are defined during the offer stage and it is to these that reference should be made.

For all OCEAN - MEOCEAN TECH modelsMODEL and CODE Identifies the size of the machine (see Chapter 1 “General information”) and the

type of construction that distinguishes it.MANUAL Code number of this manual.SERIAL NUMBER It is the construction number of the unit.YEAR OF CONSTRUCTION It is the year of the final test of the machine.VOLTAGES/PHASES/FREQUENCY

Power supply specifications.

MAX. CONSUMPTION (I max) This is electrical current consumed by the unit during the limit working conditions (refrigerant condensing temperature is 65°C = 149°F; refrigerant evaporating temperature is 15°C = 59°F).

INSTALLED POWER (P max) It is the power absorbed by the unit during the limit working conditions (refrigerant condensing temperature is 65°C = 149°F; refrigerant evaporating temperature is 15°C = 59°F).

PROTECTION RATING Protection rating of the machine, as defined in European standard EN 60529.REFRIGERANT The refrigerant used in the refrigerant circuit.COOLANT CHARGE Quantity of coolant fluid filled in the plant.For OCT 018÷050 ME-OCT 018÷600 models MAX. REFRIG. PRESS. Designed pressure of the refrigerant circuit. MAX. REFRIG. TEMP. Designed temperature of the refrigerant circuit.For OCT 070÷600 modelsMAX. ALLOWABLE REFRG. PRESS. HP SIDE

Designed pressure of the refrigerant circuit high pressure side.

MAX. ALLOWABLE REFRG. PRESS. LP SIDE

Designed pressure of the refrigerant circuit low pressure side.

For all OCEAN - MEOCEAN TECH modelsCOOLING FLUID Type of fluid used in the machine (usually water).MAX. WORKING PRESSURE Max designed pressure of the user circuit.MAX. TEMPERATURE Maximum design temperature of the user circuit, absolutely not to be confused with

the maximum working temperature of the machine, which is defined in the offer.SOUND PRESSURE LEVEL Sound pressure level in a free field in hemispherical irradiation conditions (open

field) at a distance of 1 m from the machine, condenser side, and at 1.6 m from the ground.

AMBIENT TEMPERATURE Min. and max. thermal exchanging air temperature value (ambient temperature).WEIGHT It is the approximate weight of the unit before packing.


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3 . 1 S t a n d a r d u n i t s p e r f o r m a n c e O C T - M E O C T3.1.1 Performance

The chiller performance mainly depends on the flow and temperature of the cooled water and on the temperature of the condensation water.These data are defined during the offer stage and it is to these that reference should be made.

3.1.2 Data concerning the hydraulic group kit (optional)For further information see 4.3.2 “Hydraulic group kit (OPTIONAL)”.

NOTEThe head is the head available to the user. It is possible for the pump installed to be different from the standard. In this case reference should be made to the data in theoffer.

Model

Tank capacity

water volume(litres)

PUMP P0 PUMP P1

Water flow rate

min/max (m3/h)

Available head(bar)

Absorbed power(kW)

Water flow rate

min/max (m3/h)

Available head(bar)

Absorbed power(kW)

OCT/ME-OCT 018 40 0.52/1.14 1.10/0.30 0.26 - - -

OCT/ME-OCT 022 40 0.64/1.41 1.10/0.26 0.26 - - -

OCT/ME-OCT 030 40 0.84/1.63 1.02/0.22 0.26 - - -

OCT/ME-OCT 040 40 1.22/2.15 0.96/0.24 0.26 - - -

OCT/ME-OCT 050 135 1.90/3.91 1.76/0.84 0.37 1.90/3.91 2.60/1.63 0.55

OCT/ME-OCT 070 135 2.84/4.84 1.57/0.67 0.37 2.84/4.84 2.40/1.38 0.55

OCT/ME-OCT 100 135 3.18/7.45 1.77/0.70 0.55 3.18/7.45 2.68/1.52 0.90

OCT/ME-OCT 130 135 4.11/8.76 1.67/0.46 0.55 4.11/8.76 2.57/1.23 0.90

OCT/ME-OCT 150 135 6.02/9.87 1.35/0.75 0.75 6.02/9.87 2.16/1.60 1.50

OCT/ME-OCT 200 250 7.12/13.47 1.45/0.80 0.75 7.12/13.47 2.27/1.65 1.50

OCT/ME-OCT 230 250 8.05/15.22 1.33/0.43 0.75 8.05/15.22 2.17/1.28 1.50

OCT/ME-OCT 280 250 9.78/19.50 1.36/0.53 1.10 11.12/19.50 2.02/1.34 1.85

OCT/ME-OCT 350 250 12.38/21.90 1.26/0.40 1.10 12.38/22.91 2.01/1.15 1.85

OCT/ME-OCT 400 350 16.10/31.36 2.50/0.84 3.00 16.10/31.36 3.18/1.53 4.00

OCT/ME-OCT 500 350 18.52/36.03 2.41/0.47 3.00 18.52/36.03 3.10/1.16 4.00

OCT/ME-OCT 600 350 21.82/37.86 2.22/0.40 3.00 21.82/37.86 2.90/1.10 4.00


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3.1.3 Sound Level Measurements

* at distance of 1 metre (3,2 FT)** globalTest conditionsNoise levels refer to operation of the unit at full load in nominal conditions.Sound pressure level in hemispherical irradiation conditions at a distance of 1 m (3,2 FT) from the condenser side of the unit and height of 1.6 m (5,2 FT) from the ground. Values tolerance ± 2 dB.Sound power level: in compliance with ISO 3744.

STANDARD WITH JACKETLp dB(A) * Lw dB(A) ** Lp dB(A) * Lw dB(A) **

OCT/ME-OCT 018 45.0 58.0 42.4 55.4OCT/ME-OCT 022 45.7 58.7 43.2 56.2OCT/ME-OCT 030 46.1 59.1 43.5 56.5OCT/ME-OCT 040 49.7 62.7 46.5 59.5OCT/ME-OCT 050 50.9 63.9 48.2 61.2OCT/ME-OCT 070 52.6 65.6 49.8 62.8OCT/ME-OCT 100 55.0 68.0 51.9 64.9OCT/ME-OCT 130 58.7 71.7 55.8 68.8OCT/ME-OCT 150 61.1 74.1 57.8 70.8OCT/ME-OCT 200 62.4 75.4 59.7 72.7OCT/ME-OCT 230 63.6 76.6 60.6 73.6OCT/ME-OCT 280 64.1 77.1 61.4 74.4OCT/ME-OCT 350 65.9 78.9 63.0 76.0OCT/ME-OCT 400 66.8 79.8 64.1 77.1OCT/ME-OCT 500 67.0 80.0 64.2 77.2OCT/ME-OCT 600 68.7 81.7 65.9 78.9

OPERATING AND MAINTENANCE MANUALDescription

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CHAPTER 4

DESCRIPTION4 . 1 O p e r a t i n g p r i n c i p l e

All the machines described in this manual work on the basis of the same principle.The cooling circuit cools a water flow using a plate-type evaporator with one refrigerant circuit, where on one side the refrigerant fluid evaporates, and on the other side the liquid that have to be cooled flows.The cooling compressors are controlled by an electronic unit which checks:

• the inlet water temperature of the evaporator;• the evaporator water inlet temperature in order to maintain it within the preset limits;• the evaporator water outlet temperature and the pressure difference between the evaporator water inlet and

outlet in order to eliminate the risk of freezing caused by zero flow.• outlet condenser temperature

4 . 2 M a t e r i a l sThe technical data of the materials concern the standard units.Different materials can be used to satisfy special requirement, in such a case it is necessary to refer to the data agreed during the offer stage.

4.2.1 Structure and casingThe bed is made up of a carbon zinc-coated and painted plate.The panel inside the unit are fixed to the bed through screws, while the structural panels (bulkhead and cover) are riveted to it.The carpentry of the unit is degresed with phosphorus and it is painted with polyester resins. The structure has been designed to allow the an easy access at the components of the unit.The units are have only one compressors-exchangers compartment insulated through sound absorbing mattress, that is 13 mm for the first two frames, and 20 mm for the third and fourth frame.

4.2.2 CompressorsThe OCT/ME-OCT018÷030 units are equipped with a Rotary compressor of hermetic type, while the OCT/ME-OCT 040÷350 units are equipped with a Scroll compressor of hermetic type, and they permit to obtain an high energetic efficiency (high COP evaluations a low vibration level, that means a silent running. The compressors are single up to the OCT/ME-OCT 150 models, while the OCT/ME-OCT 200÷350 models are furnished with two tandem compressors. These components are positioned in the compressor compartment, that is sound isolated with a sound-absorbent mattress 13÷20 thick.The unit 400÷600 are equipped with Scroll compressors of hermetic type, and they permit to obtain an high energetic efficiency (high COP evaluations a low vibration level, that means a silent running. The compressors are two, one each circuit. These components are positioned in the compressor compartment, that is sound isolated with a sound-absorbent mattress 13÷20 thick.

NOTEThe sound insulating compressor jacket is also available as option.

The unit is furnished with an electric 2- poles motor, which is cooled through the gas drew in by the compressor (only scroll) and it is protected from the overheating of the windings by an inner modulus, that checks their temperature. Moreover the compressors are protected by thermo-magnetic switches or fuses. All the compressors are set up on rubber antivibration devices.

OCT/ME-OCT 018÷040 OCT/ME-OCT 050 OCT/ME-OCT 070÷150 OCT/ME-OCT200÷600


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NOTEFor models from 018 to 280, at the first start-up after several days of inactivity, activate the compressor crankcase heaters atleast 6 hours before starting the machine.

4.2.3 Materials in contact with the l iquid of the user circuitThe evaporator, the condensator and the recovery/desuperheater are of copper braze welded stainless steel plate-type.

4.2.4 Evaporators / Condensers

All OCEAN TECH/ME-OCEAN TECH units utilize as Evaporator and Condenser plate type exchanger.

The plates are made up of stainless braze welded steel, through them flow the refrigerant and the process fluid that have to be cooled (evaporator) or heated (condenser). These exchanger are very efficient and compact, therefore they need few space inside the unit.

ATTENTION

The liquid flow inside the exchanger must not exceed the values of the table in chapter 5.4 “Hydraulic connections”.

Evaporators:The evaporator is protected against freezing, due to low evaporating temperatures, by the anti-freeze function of the electronic board, which check the water outlet temperature. Furthermore, each evaporator is furnished with a differential pressure switch, which protects the evaporator against the absence of water flow.The shell is externally covered with a 9 mm thick insulated and anti-condensate aluminate material.Condenser:The condensers have no insulation.The condenser of the OCEAN TECH/ME-OCEAN TECH units can use both city water and well water.

4 . 3 R e f r i g e r a n t a n d h y d r a u l i c c i r c u i t(See annexes)

4.3.1 Water circuitThe units can be equipped with:

• Plate type evaporator (in all the units);• Plate type condenser (not present in evaporating units);• Water differential pressure switch that protects the evaporator from the damage caused by law liquid flows (in

all units).• Hydraulic kit (OPTINAL)• water regulating valve or modulating valve kit (OPTINAL)

NOTEAll units are furnished with an evaporator and condenser water side inlet/outlet.

4.3.2 Hydraulic group kit (OPTIONAL)The units are designed with an EXTERNAL hydraulic group (optional) equipped with a casing, an accumulation tank and a circulation pump (the standard one has a lift included between 5 and 10 m.w.c, while the high one has a lift included between 10 and 15 m.w.c). In the external hydraulic group (optional) of the monophase units there is a tank and a three working-speed circulator, with a lift of 50kPa. In the monophase units there are not high lift pumps.Hydraulic group with standard and high lift pumpThe hydraulic group is a carbon steel cylinder insulated by an external anti-condensing material 9mm thick, the cylinder is vertical in the OCT/ME-OCT018÷150 models, or horizontal in the OCT/ME-OCT 200÷600 models.

• the standard pump has a lift included between 5 and 10 m. w.c. • the high lift pump has a lift included between 10 and 15 m. w.c.

EVAPORATOR

CONDENSER


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The tank and the pump are inside the hydraulic group and they are connected to the evaporator and to the water inlet/outlet by flexible piping. This option includes an expansion tank, an automatic breather valve, a safety valve, a drain cock and an automatic charging group with a manometer. From the external you can access the charging valve, the brether valve and the drain valve. The electronic board controls the pump and runs the thermal protection alarm. The bed and some panels of the unit are used in the casing of the hydraulic group.

NOTEIn the monophase units OCT/ME-OCT 018÷040 there is not the high lift hydraulic group.

NOTEYou can find the diameters of the water outlet connection of the HYDRAULIC GROUP KIT in the chapter 5.4 “Hydraulicconnections” or in the overall dimension drawings.

ATTENTION

The pump must never run dry.

4.3.3 Cooling circuit (OCEAN TECH only)Different materials can be used to satisfy special requirement, in such a case it is necessary to refer to the data agreed during the offer stage.All OCEAN TECH units are furnished with the following components:

• Refrigeration compressor;• Evaporator;• Condenser;• Expansion thermostatic valve with external equalization;• High and low pressure switch;• Differential pressure switch in the evaporator water side;• Drier filter;• Flow indicator;• High pressure circuit safety valve (OCT 500÷600 models).

The refrigerant gas is pressed by the refrigeration hermetic compressor that send it to the condenser. Here the gas condenses exchanging heat with the refrigerant fluid, and it is discharged under liquid state by the cock and the drier filter. After crossing the flow indicator, the liquid is rolled by the thermostatic valve and it enters the evaporator. Here it exchanges heat with the process liquid and evaporates.Now it can be sucked by the compressors and the cycle starts again.

4.3.4 Evaporating version cooling circuit (ME-OCEAN TECH)The evaporating units (ME-OCEAN TECH) have not the condenser, that have to be installed by the customer/installer.All ME-OCEAN TECH units are furnished with the following components:

• Refrigeration compressor;• Evaporator;• IN/OUT cock for cooling tubes, to seal the circuit• Expansion thermostatic valve with external equalization;• Solenoid valve on the liquid line• Condenser outlet temperature probe (installed by the installer)• High and low pressure switch;• Differential pressure switch in the evaporator water side;• Drier filter;• Flow indicator;• High pressure circuit safety valve (ME-OCT 500÷600 models).

ATTENTION

The completing of the installation must be carried out by the customer/installer.The sizing and building of the cooling lines that connect the evaporating units and the condenser is very important, and so itmust be carried out by qualified personnel.

For the installation see paragraph 5.8 “Cooling circuit connections only for evaporating ME-OCT units”. Once the remote condenser has been installed, the ME-OCEAN TECH units will work as described in paragraph 4.3.3 “Cooling circuit (OCEAN TECH only)”.

4 . 4 E l e c t r i c a l c i r c u i tSee annexes.

OPERATING AND MAINTENANCE MANUALInstallation

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CHAPTER 5

INSTALLATIONATTENTION

Before carrying out the installation or operating on this machine, ensure that all the personnel has read and understoodthe chapter " Safety" in this manual.

5 . 1 I n s p e c t i o nImmediately after uncrating, inspect the unit.

5 . 2 L o c a t i o n1. The unit can be installed either outdoors or in an enclosed environment, depending on the degree of IP protection

of the electrical panel and the unit itself.2. If the unit is installed indoors the place of installation must be well ventilated. In certain cases it may be necessary

to install ventilation fans or extractor fans in order to reduce room temperature.3. The ambient air must be clean, avoid sea ambients (brackish air), and not contain flammable gas or corrosive

solvents.4. The minimum and maximum working ambient temperature are specified on the unit data plate. Ensure that the

unit is not installed in flows of hot air emitted by other equipment.In extremetemperature conditions, the protection devices may trip.

5. Do not obstruct or interfere with the air flow produced by the unit; comply strictly with the minimum spaces/distances specified in the installation drawings.

6. The machine must be installed on a perfectly horizontal flat surface, built and calculated to withstand themachine’s operating weight, especially in the contact points highlighted in the installation drawing. In the eventof installations which fail to comply with the above requirements, the manufacturer’s warranty cover willimmediately become null and void and the unit could malfunction or even lock out.

7. Leave free space around the unit for access during service interventions (see Attachments).8. Do not install the plant in sites exposed to strong winds; if unavoidable, install suitable windscreens.

See point 1.


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5 . 3 A n t i f r e e z e p r o t e c t i o nDuring stoppages in the cold seasons the environment temperature could be lower than 0° C.If the machine can not be emptied, it is necessary the addition of antifreeze fluid (ethylene glycol) as following:

ATTENTION

To stop any kind of impurity of the exchange water, install a filter on the condenser water inlet.

ATTENTION

Freeze protection setpoint set at 5°C. To lower the freeze protection setpoint, modify parameter Ar03.

5 . 4 H y d r a u l i c c o n n e c t i o n s1. Connect the machine to the water pipeline as indicated in the overall dimension drawings.2. Provide two cocks (inlet/outlet) to be able to service the machine, without empty the user water circuit.

ATTENTION

It is recommended to install one pump for the water condensing circuit, and one pump for the water evaporating circuit.If the unit is equipped with the hydraulic group kit, 4.3.2 “Hydraulic group kit (OPTIONAL)”, the pump is already connectedto the evaporating water circuit, so it will be necessary to install only the pump in the condensing water circuit.The installation must be carried out by the customer.For the maintenance of the unit it is recommended to instals a drain cock in the lower side of the circuit.

NOTEFor correct operation of the unit install a filter to intercept debris in the water inlet pipe. Failure to observe this prescriptioncan result in irreparable damage to the evaporator.In the case of plate evaporators, the clogging of even a few plates (or gaps) can cause the plate to seize (clogging), leadingto damage of part of the exchanger, even if water flow seems regular and operation is apparently normal.

The hydraulic plant must be dimensioned so that the pressure values of the water flow into the unit are not higher than those indicated in the table below:

Ambient temperatureup to [°C]

Ethylene Glycol[% in weight]

0 0-5 15

-10 25-15 30-20 40

OCT/ME-OCT 018

OCT/ME-OCT 022

OCT/ME-OCT 030

OCT/ME-OCT 040

OCT/ME-OCT 050

OCT/ME-OCT 070

OCT/ME-OCT 100

Connections diametersCondenserEvaporator

In/out (ø Gaz)

1” 1” 1” 1” 1”¼ 1” ¼ 1” ½

Evaporator water capacity

min [m3/h] 0,35 0,45 0,55 0,90 1,30 1,80 2,80

max [m3/h] 1,40 1,85 2,23 4,00 5,50 7,80 11,80

Condenser water capacity

min [m3/h] 0,21 0,30 0,37 0,50 0,70 1,00 1,20

max [m3/h] 1,40 1,70 2,20 4,00 5,60 7,20 10,40


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In the following table you can find the diameters of the HYDRAULIC KIT:

Here below you can find all condenser, evaporator and hydraulic group inlets and outlets.

NOTEPay attention that in the unit furnished with hydraulic group kit, see paragraph, 4.3.2 “Hydraulic group kit (OPTIONAL)”,the evaporator outlet is connected to the accumulation group.

OCT/ME-OCT 130

OCT/ME-OCT 150

OCT/ME-OCT 200

OCT/ME-OCT 230

OCT/ME-OCT 280

OCT/ME-OCT 350

OCT/ME-OCT 400


In/out (ø Gaz)

1” ½ 1” ½ 2” 2” 2” ½ 2” ½ 2” ½


min [m3/h] 3,80 4,30 5,50 5,50 6,80 8,00 8,50

max [m3/h] 17,0 18,7 24,0 24,0 29,0 34,5 38,0


min [m3/h] 1,60 2,00 3,0 3,0 3,0 4,5 5,9

max [m3/h] 14,5 14,5 22,0 24,0 24,6 34,0 39,0

OCT/ME-OCT 500

OCT/ME-OCT 600


In/out (ø Gaz)

2” ½ 2" ½


min [m3/h] 10,5 12,2

max [m3/h] 47,0 55,0


min [m3/h] 5,9 7,5

max [m3/h] 47,0 56,0

OCT/ME-OCT018

OCT/ME-OCT 022

OCT/ME-OCT030

OCT/ME-OCT 040

OCT/ME-OCT 050

OCT/ME-OCT 070

OCT/ME-OCT 100

HYDRAULIC KIT

In (ø Gas) 1” 1” 1” 1” 1”¼ 1”¼ 1”½Out (ø Gas) 1” 1” 1” 1” 1”¼ 1”¼ 1”½

OCT/ME-OCT 130

OCT/ME-OCT 150

OCT/ME-OCT 200

OCT/ME-OCT 230

OCT/ME-OCT 280

OCT/ME-OCT 350

OCT/ME-OCT 400

HYDRAULIC KIT

In (ø Gas) 1”½ 1”½ 2” 2” 2” ½ 2” ½ 2” ½Out (ø Gas) 1”½ 1”½ 2” 2” 2” ½ 2” ½ 2” ½

OCT/ME-OCT 500

OCT/ME-OCT 600

HYDRAULIC KIT

In (ø Gas) 2” ½ 2” ½Out (ø Gas) 2” ½ 2” ½


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The standard connection foreseen for the hydraulic unit is with “cool” tank down-stream from the evaporator according to the following sequence:

Return from the system => evaporator => tank => pump => delivery to the system

After having made the hydraulic connections according to the sequence above, the following operations must be carried out for correct unit operation:

1. Move the BEWOT temperature control probe from the socket on the evaporator outlet to the socket on the pumpdelivery of the hydraulic unit (“cool” temperature control after the tank);

2. Move the BEWIT probe from the socket on the evaporator inlet to the socket on the evaporator outlet; 3. Change the value of the AL19 parameter from 2 to 1 to enable the antifreeze on the BEWIT probe.

OCT/ME-OCT 018÷040 with HYDRAULIC GROUP KIT OCT/ME-OCT 050÷150 with HYDRAULIC GROUP KIT

OCT/ME-OCT 200÷600 with HYDRAULIC GROUP KIT

CONDENSEROUTLET

CONDENSERINLET EVAPORATOR

OUTLET

EVAPORATORINLET

HYDRAULICGROUPINLET

HYDRAULIC GROUPOUTLET

HYDRAULICGROUPINLET

EVAPORATOROUTLET

EVAPORATORINLETCONDENSER

OUTLET

CONDENSERINLET

HYDRAULICGROUPOUTLET


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It is also possible to install the tank upstream from the evaporator with “hot” tank and a thermostat on evaporator inlet (non-standard connection) according to the following sequence:

Return from the system => tank => pump => evaporator => delivery to the system

ATTENTION

In this case (non-standard) certain parameters of the electronic control must be changed and the piping to connect thechiller and the hydraulic unit (supplied as standard) cannot be used.

After making the hydraulic connections according to the sequence above the following operations must be carried out for correct unit operation:

1. Change the ST01 temperature control setting from 7 to 12;2. Enable temperature control on the evaporator inlet probe by changing the CF03 parameter from 1 to 0 (the

antifreeze remains on the evaporator outlet probe).

ATTENTION

In the case of a "non-standard" connection it is not necessary to move the BEWOT and BEWIT probes.

5 . 5 E l e c t r i c a l C o n n e c t i o n sThe connection of the unit to the power supply network must be done in conformity with the laws and prescriptions in force in the installation place.The power supply voltage, the frequency and the phase number must be as shown on the unit data plate.The power supply voltage must not be, also for short periods, out of the tolerances given in the wiring diagram.Except for different indications, the frequency tolerance is +/-1% of the nominal value (+/-2% for short periods).In the event of three-phase supply, the system must be symmetrical (equal effective voltage values and equal phase angles among consecutive phases). In particular, except for different indication, the max. unbalance between each phase is 2%. The unbalance is calculated as following:

Vavg= average of voltage phases

For the electrical supply:1. connect the unit (PE terminal in the electrical panel) to the earthed system of the building 2. guarantee the automatic interruption of the power supply in the event of insulation failure (protection against

indirect contacts in compliance with IEC 364) by means of a differential device (normally with operation nominalcurrent of 0.03 A).

3. at the beginning of the electrical supply cable must be guaranteed a protection against direct contacts with aprotection degree of IP2X or IPXXB at least.

4. at the beginning of the electrical supply cable must be installed protection devices that protect againstovercurrents (short circuit) (see information in the electrical wiring; the device must limit the peak short circuitcurrent to 17kA with respect to its nominal switch-off capacity if the short circuit current available at the point ofinstallation is greater than 10 kA.

5. use conductors which transform the max. current required to the max. operating ambient temperature, according tothe selected installation type (IEC 364-5-523) (see information in the electrical wiring)

Wiring diagram indication:• max. size permitted for the fuse type gG.

In general, the fuses can be replaced with an automatic switch regulated by means of the unit max. absorbed current (contact the manufacturer if necessary)

• section and type of the power supply cable (if not already supplied):• installation: insulated conductors, multipolar cable in duct, in air or over masonry (C type in compliance with

IEC 364-5-523 1983) or without no other cable in contractcable type: copper conductors, PVC insulation from 70°C (if not specified) or EPR insulation from 90°C

The harness of the power supply cable is made by the client.For the inlet of the electrical connections in the unit, use the predisposed plates as you see in the figures below.

Max difference of each phase from Vavg Vavg x 100


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OCT/ME-OCT 018÷150

OCT/ME-OCT 200÷600

Unsheathe the cable and make it passes across the slits back the unit (see the figure above).Wire the cable on the general switch-breaker as showed on the wiring diagram of the machine.

ATTENTION

Respect the phase sequence (L1, L2, L3) as indicated in the enclosed wiring diagram and photo, on the contrary thescroll compressor will make noise and could overheat (intervention of the inner thermal protection).

5 . 6 P h a s e M o n i t o rThe electronic controller, with the aid of a Phase Monitor (see unit wiring diagram), enables to control unit electric power feeding, stopping the unit in case of incorrect phase sequence or phase failure.Tripping of the Phase Monitor stops the unit and causes and A01 alarm is displayed.Some measure of instability on the power feeding line can be considered to be normal.If the frequency of unit shut-downs caused by Phase Monitor tripping should increase, contact your electricity company in order to solve the problem.

ATTENTION

It is strictly prohibited to tamper with the Phase Monitor.

L1 L2 L3


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5 . 7 P r o b e s p o s i t i o n i n g M E - O C E A N T E C HThe OCEAN TECH units are equipped with evaporator inlet/outlet probes and with a condenser outlet probe the check the temperature.The OCEAN TECH units are furnished with probes, that are positioned in the condenser and evaporator wells.In the evaporating ME-OCEAN TECH units the evaporator outlet probe BEWOT (utilized for the antifreeze function and for the temperature regulation) and the evaporator inlet probe BEWIT have already been installed in the units, while the condenser outlet probe BWOT is furnished with the unit but it has to be installed in the condenser outlet.

ATTENTION

The condenser outlet probe BWOT of the OCEAN units are installed.The installation of the condenser outlet probe BWOT of the ME-OCEAN units have to be installed by the customer/installer.

Both the condenser and the evaporator are furnished with inlet and outlet probes that detect the temperature.The OCEAN units are furnished with probes, that are positioned in the condensers and evaporators wells (inlet/outlet).In the evaporating ME-OCEAN units the evaporator outlet probe BEWOT (utilized for the antifreeze function and for the temperature regulation) and the evaporator inlet probe BEWIT have already been installed in the units, while the condenser outlet probe BWOT is furnished with the unit but it have to be installed in the condenser outlet.

ATTENTION

The condenser outlet probe BWOT of the OCEAN TECH units are installed.The installation of the condenser outlet probe BWOT of the ME-OCEAN TECH units have to be installed by the customer/installer.

5 . 8 C o o l i n g c i r c u i t c o n n e c t i o n s o n l y f o r e v a p o r a t i n g M E -O C T u n i t s

The evaporating units ME-OCEAN TECH are not equipped with the condenser the installation must be carried out by the customer/installer.

ATTENTION

The sizing and building of the cooling lines that connect the motocondensing units and the evaporating units is veryimportant, and so it must be carried out by qualified personnel.

On the back side of the unit are positioned the inlet/outlet refrigerant, the upper one is the refrigerant outlet, while the lower one is the refrigerant inlet (see annexes).The table below shows the diameter of the connection lines to be adopted:

ME-OCTUnit

18÷30 40 50 70÷

100 130 150 200÷280 350 400÷

600

Connection diameter of the delivery line [mm] 10 12 16 18 22 22 28 35 35

Connection diameter of the liquid line [mm] 10 12 12 16 16 18 22 22 28

OPERATING AND MAINTENANCE MANUALStart up

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CHAPTER 6

START UPATTENTION

Before starting up these units be sure that all personnel have read and understood the chapter " Safety".

ATTENTION

When the system is started up, if the high pressure alarm A01 is triggered without the compressor having been started,stop the unit immediately by setting it in OFF status from the controller.Then check the refrigerant circuit high pressure value; if this value is within the normal operating range, check that thesequence of phases upstream of the unit is correct.Alarm A01 may also be triggered by tripping of the fuse of the transformer inside the electrical panel.

1. Check if the machine on/off valves are open.2. If the hydraulic circuit is of closed type, there must be an adequate expansion tank.3. Check that the ambient temperature is within the limits indicated on the machine data plate.4. Check that the main switch is in the opening position (“0”).5. Check if the power supply voltage is correct.6. Power the machine by means of the supply line protection device (stand-by).7. Turn the machine main switch ON (“I”).8. Be sure that the water flows across the evaporator and the condenser.9. To switch on the unit read the following instruction (for further information see chapter 7.12 “Unit switching on /

off”):• Pressing the button for 5 sec. it is possible to start up and turn off the unit.

If the led flashes for 5 seconds and then it remains lit the unit is on.10. In three-phase units check that compresses works correctly (it must not be noisy or overheated) and check that the

pump (if installed) and the fun (if installed) rotation direction is correct.If it is necessary invert two of the three phases of the electric supply.

11. during the first start-up, there is a high ambient temperature and the temperature of the water in the hydrauliccircuit is much higher than the working value (e.g. 25-30°C) this means that the machine starts up overloaded withthe consequence of possible tripping of the protection devices or compressors unloading (where foreseen).To reduce this overload, a machine outlet valve can be gradually (but not totally!) closed to reduce the flowof water passing through it.Open the valve as the water temperature in the hydraulic circuit reaches the working value.

12. The machine is now ready to work.If the thermal load is lower than that produced by the machine, the water temperature drops until it reaches the set-point value (ST01 parameter) set following the indications of Chapter 7 “Electronic Board”.When the SET-POINT value has been reached the electronic board, that checks the water inlet temperature, stopsthe compressor.

OPERATING AND MAINTENANCE MANUALElectronic Board

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CHAPTER 7

ELECTRONIC BOARD7 . 1 U s e r i n t e r f a c e

7.1.1 DisplayThe display is divided in 3 zones.

7.1.2 Display icons

Upper-left zone

Generally it displays the evaporator water inlet / outlet temperature.

NOTEThe displaying depends on the setting of parameter CF36 seechapter 7.11 “Values displayed”.

Lower-left zone

Condensation temperature / pressure or evaporator water antifreeze temperature (heat pump water units), with the appropriate unit of measurement.

NOTEThe displaying depends on the setting of parameter CF42 seechapter 7.11 “Values displayed”.

Right zone

Signalling icons.

ICON MEANING ICON MEANING

Celsius degrees (If displayed) Low pressure alarm

Fahrenheit degrees (If not displayed) Antifreeze resistance

Bar/Psi Pump ON

Compressor 1 Flow meter alarm

Compressor 2 Time to defrost starting (hour)

Stand-by unit Fan ON

General alarm Indication for Function Menu entering

High pressure alarm


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7 . 2 B u t t o n s f u n c t i o n

7.2.1 Function of combined buttons

7 . 3 S y m b o l s a n d l e d s o n t h e d i s p l a y

7 . 4 R e m o t e t e r m i n a l7.4.1 Function of buttons

If there is no communication between the unit and the remote terminal, in the upper part of the display it appears the message “ ” (no link).

BUTTON FUNCTIONIf pressed for 5 seconds, according to the programming, it allows to switch on or off the unit in chiller or heat pump modality. It selects IN/OUT water temperatures and ambient air temperatures in the upper part of the display. During programming phase it scrolls the parameter’s codes or increases their values.If pressed for 5 seconds, according to the programming, it allows to switch on or off the unit in chiller or heat pump modality. It selects the external air temperature / defrosting temperature. During programming phase it scrolls the parameter’s codes or decreases their values.If pressed for 5 seconds, it allows to display or modify the set point.During programming phase it selects a parameter of confirms a value.It allows to enter Function Menu and to regulate the hour.

BUTTONS FUNCTION

+ To enter programming phase (pressed for 5 sec).

+ To exit programming phase.

LED LED STATUS MEANING LED LED STATUS MEANING

Steady Unit on in heat pump modality Steady Defrosting enabled

Steady Unit on in chiller modality Unlit Defrosting disabled or terminated

FlashingProgramming phase (if flashes together with led)

Clock adjustment

Flashing Time to defrost starting

BUTTON FUNCTIONIt allows to enter Function Menu and to regulate the hour.It allows to display or modify the set point.During programming phase it selects a parameter or confirms a value.It selects IN/OUT water temperatures and ambient air temperatures in the upper part of the displayDuring programming phase it scrolls the parameter’s codes or increases their values.It selects the displaying of external air temperature / defrosting temperature.During programming phase it scrolls the parameter’s codes or decreases their values.If pressed for 5 seconds it allows to switch on or off the unit in chiller or heat pump modality.If pressed for 5 seconds it allows to switch on or off the unit in chiller or heat pump modality.


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7 . 5 D i s p l a y i n g d u r i n g a n a l a r m

7.5.1 Alarm iconsThere are four icons for alarm signalling:

7 . 6 H o w t o s i l e n c e t h e b u z z e rAutomatic silencing: it happens when the cause of the alarm has been eliminated.Manual silencing: press and release one of the four buttons; the buzzer silences even if the alarm condition persists.

7 . 7 F i r s t s t a r t u pIf the probes used to control the unit are not connected or are damaged, the appropriate alarm will be displayed.However, it is possible to regulate the clock or to programme the unit.

7 . 8 H o w t o r e g u l a t e t h e c l o c k ( N O T E N A B L E I N T H E S E U N I T S )

1. Press button for some seconds until the message “ ” appears in the lower part of the display, and in theupper part of the display it appears the store.

2. Press button: the hour starts flashing.3. Regulate the hour using and buttons.

Confirm the new hour pressing button; the controller will display the following setting.4. Repeat points 2.and 3. for the other parameters of the clock:

• : minutes (0÷60)• : week day ( = Sunday, = Monday, = Tuesday, = Wednesday, = Thursday, =

Friday, = Saturday). • : month day (0÷31) • : month (1÷12)• : year (00÷99)

7 . 9 P r o g r a m m i n g b y “ H o t K e y ”7.9.1 How to programme the unit by a programmed key (Download)

With unit switched off:1. Insert the key.2. Switch on the unit.3. It starts the download of data from the key to the unit.

During download phase the adjustments are blocked and in the lower part of the display it appears the flashing message “dOL”.At the end, in the upper part of the display it appears the message:“End” If the programming was good (after 15 seconds it starts the adjustment).“Err” If the programming was not good.

ATTENTION

With error signalling the unit have to be turned off and switch on to repeat the procedure or to operate with the normalregulation.

During normal operation (no alarm), when an alarm occurs the alarm code and the appropriate icon flash in the lower part of the display, alternated to the temperature / pressure.

General alarm

High pressure alarm

Low pressure alarm

Flow meter alarm


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7.9.2 How to store the parameters of the unit in the key “UPL”Instrument on:

1. Insert the key.2. Press to enter the function menu (see paragraph 7.14.1 “Access to Function menu”)3. Use or buttons to select the function UPL in the lower part of the display.4. Press .

It starts the upload of data from the unit to the key.During upload phase in the lower part of the display it appears the flashing message “UPL”.At the end of programming phase the following messages appear in the upper part of the display:“End” If the programming was good.“Err” If the programming was not goodTo exit “UPL” function, press button or wait for time-out.

7 . 1 0 P r o g r a m m i n g b y k e y b o a r dThe parameters of electronic control are divided in two groups and in two levels:

1. USER (Pr1);2. SERVICE (Pr2).

USER level allows to access user parameters, SERVICE level allows to access the parameters of unit configuration (it is protected by a password).The parameter’s groups, indicated by some “Label”, are divided as follows:

7.10.1 Access to “Pr1” parameters (User level)To enter the menu of “Pr1” parameters which can be access by the user:

1. Press for some seconds + buttons ( and start flashing), in the upper part of the display appears “ALL”,the first group of parameters.

2. Select the various groups using and buttons.3. After selecting a group, press button:

if the selected group is part of the selected menu or any parameter of this group has been moved in this menu, inthe lower part of the display it appears the “Label” and the code of the group’s first parameter present in “Pr1”, itsvalue appears in the upper part of the display.It will not be possible to enter a parameter’s group which is not part of this menu.

4. It is possible to scroll or modify the parameters contained in the group.

7.10.2 How to modify a parameter’s value1. Enter the programming procedure.2. Select the desired parameter.3. Press button to enable the value adjustment.4. Modify the value by means of and buttons.5. Press to store the new value and to pass to the code of the following parameter.6. To exit the procedure: Press + when a parameter is displayed, or wait (about 240 seconds) without pressing

any button.

NOTEThe new value is stored also when the programming procedure is terminated for “time out”, without pressing button.

ATTENTION

You can modify the parameter of the CF (configuration parameters) family only when the unit is in stand by.

LABEL ACTIONALL It displays all parametersST It displays Thermoregulation parametersCF It displays Configuration parametersSd It displays only the parameter of the Dynamic Setpoint (NOT ENABLE FUNCTION)ES It displays only the parameter of the Energy Saving (NOT ENABLE FUNCTION)Ar It displays only the parameter of the antifreeze resistanceLS It displays only the LASER parameter (NOT ENABLE FUNCTION)


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7 . 1 1 V a l u e s d i s p l a y e dThe values visualized on the display change according to the configuration of parameters CF36 for the top part and CF42 for the bottom part. For remote terminal it changes according to the configuration of parameters CF43 for the top part and CF44 for the bottom part.

Parameter CF36/CF43 = 0In the top part of the display it appears the probe BEWITParameter CF36/CF43 = 1In the top part of the display it appears the probe BEWOTParameter CF36/CF43 = 2No value will appear in the top part of the displayParameter CF36/CF43 = 3In the top part of the display it appears the probe BWOTParameter CF36/CF43 = 4In the top part of the display it appears the chiller set; off when unit in stand-byParameter CF36/CF43 = 5In the top part of the display it appears “OnC” when the unit is operating; off when unit in stand-byParameter CF36/CF43 = 6In the top part of the display it appears the LASER set (FUNCTION NOT ENABLED)Parameter CF36/CF43 = 7No value will appear in the top part of the displayParameter CF36/CF43 = 8In the top part of the display it appears the operating differential

Parameter CF42/CF44 = 0In the bottom part of the display it appears the probe BEWITParameter CF42/CF44 = 1In the bottom part of the display it appears the probe BEWOTParameter CF42/CF44 = 2In the bottom part of the display it appears the probe BCP1Parameter CF42/CF44 = 3In the bottom part of the display it appears the probe BWOTParameter CF42/CF44 = 4In the bottom part of the display it appears the chiller set; off when unit in stand-byParameter CF42/CF44 = 5In the bottom part of the display it appears “OnC” when the unit is operatingParameter CF42/CF44 = 6In the bottom part of the display it appears the LASER set (FUNCTION NOT ENABLED)Parameter CF42/CF44 = 7No value will appear in the bottom part of the displayParameter CF42/CF44 = 8In the bottom part of the display it appears the operating differential (units without accumulation tank)If the probe BEWIT has been selected has default, every time you press for 30 sec the upper display visualizes the BEWOT probe, in the lower part of the display it will appear the “Label” Pb2 than the default value will return to be displayed.If the probe BEWOT has been selected has default, every time you press for 30 sec the upper display visualizes the BEWIT probe, in the lower part of the display it will appear the “Label” Pb1 than the default value will return to be displayed.

7 . 1 2 U n i t s w i t c h i n g o n / o f fPress the button for 5 seconds to start up the machine.The led of icon flashes for 5 seconds then it remains lit.

7 . 1 3 H o w t o p u t t h e u n i t i n s t a n d b yStand-by modality is obtained every time the unit is switched off.It is indicated by the symbol lit.Also in stand-by modality the controller can:

1. Display the measured values2. Manage the alarms by displaying and signalling.


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7 . 1 4 F u n c t i o n m e n u ( b u t t o n )The access to Function Menu allows to:

1. Display and the alarms (see 7.14.3 “How to display the alarms “ALrM””).Reset the alarms (see “How to reset an alarm “rSt””).

2. Visualize the alarm history (see 7.14.5 “How to display the alarm historic “ALoG””).Reset the alarm history (see “How to reset the alarm history “ArSt””)

3. Upload the parameters from the unit to the key (7.9.2 “How to store the parameters of the unit in the key “UPL””).4. Visualize the operating hours (see 7.14.7 “Displaying the operating hours of loads “C1Hr - C2Hr - PFHr””).

Reset the operating hours (see “Reset of the heads operating hours”).

7.14.1 Access to Function menuPress and release button (menu).The icon “ ” will appear.

7.14.2 Exit Function menuPress and release button or wait for time out (15 seconds).The icon “ ” disappears.

7.14.3 How to display the alarms “ALrM”1. Press button to enter Function menu.2. Using or button select “ALrM” function.3. Press and release button.4. Using or button scroll all the alarms.5. To exit press button or wait for time out (30 seconds).

7.14.4 How to reset an alarm “rSt”1. Press button to enter Function menu.2. Select “ALrM” function3. Press , in the lower part of the display it appears the alarm code.4. If the alarm can be reset in the upper part of the display it appears the Label “rSt”, it the alarm can not be reset it

appears the Label “NO”.5. Use or button to scroll all the alarms.6. When the Label “rSt” is displayed, press to reset the alarm and go to the following one.7. To exit press button or wait for time out (30 seconds).

7.14.5 How to display the alarm historic “ALoG”1. Press button to enter Function menu.2. Use or button to select the function “ALoG”.3. Press until the Label with the alarm code will appear in the lower part of the display, and the Label “n°” with a

progressive number will appear in the upper part of the display.4. Using or button scroll all the alarms.5. To exit “ALoG” function and to return to normal displaying, press button or wait for time out (30 seconds).

The memory contains until 50 alarms, a further alarm will cancel from the memory the oldest one (the displaying is in increasing order, from the oldest one to the most recent one).

7.14.6 How to reset the alarm history “ArSt”1. Enter Function menu.2. Select “ALoG” function in the lower part of the display.3. Press button.4. Inside “ALoG” function, using or button, select the function “ArSt” in the lower part of the display and

“PAS” in the upper part of the display.5. Press : the password is required. In the lower part of the display it appears “PAS”, “0” flashes in the upper part

of the display.6. Insert the password for resetting.7. If the password is correct the Label “ArSt” flashes for 5 seconds to confirm the resetting.

After resetting the unit returns to normal displaying.

7.14.7 Displaying the operat ing hours of loads “C1Hr - C2Hr - PFHr”1. Press button to enter Function menu.2. Press or button until the Label of a single load appears in the lower part of the display: C1Hr (operating

hours of compressor 1), C2Hr (operating hours of compressor 2), PFHr (operating hours of water pump and of


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outlet fan).The operating hours will appear in the upper part of the display.

3. The icon will be lit.

7.14.8 Reset of the heads operating hours1. Press button to enter Function menu.2. Press or button until the Label of a single load appears in the lower part of the display (C1Hr, C2Hr “only

MCCG-CGHCG 211÷301” units, PFHr) and the operating hours appear in the upper part of the display.3. Press button for 3 seconds: in the upper part of the display it will appear “0”. It indicates that the reset has

happened.4. To exit Function menu, press button or wait for time out (15 seconds).5. For the other loads repeat the operations from point 2. to point 4.

7 . 1 5 O t h e r f u n c t i o n s f r o m k e y b o a r d7.15.1 How to display the Set Point

Press and release button.In the lower part of the display it appears “SetC” (if chiller).The adjusted value appears in the upper part of the display.

7.15.2 How to modify the Set Point1. Press button for 3 seconds at least.2. The set point will flash.3. Use or button to modify the set point value.4. To store the new set point value press button or wait for time out to exit programming procedure.


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7 . 1 6 C o m p r e s s o r s u n l o a d i n g f u n c t i o nThis procedure is necessary when sudden peaks in cooling demand occur, for instance if the machine is restarted after a long period of inactivity. Under these conditions the evaporator inlet water temperature might be so high as to require a cooling delivery in excess of system capacity. The consequent system overload would require the start-up of all the compressors at once, which would be forced to operate in near-limit conditions. The overburdened compressors would thus be subject to dangerous overheating which would cause the activation of the thermal protections, or the pressure of the refrigerant gas could reach alarm levels which would cause the machine to shut down. This function enables the machine to run (through the switch-off or capacity step operation of the compressors) even when the temperature of the water at the evaporator’s inlet is high (summer start-up with hot water accumulation), preventing the possible triggering of high pressure alarms. It is not present in one compressor units. The following messages will flash on the display:AEUn= evaporator unloading functionACUn= condensation unloading function

7 . 1 7 A l a r m c o d e s a n d a c t i o n s

COD. MEANING CAUSE ACTION RESET

P1 Alarm of probe BEWIT

Probe damaged or resistive value out of range

“open collector” outlet / alarm relay is activatedThe buzzer is activatedThe icon for general alarm flashesThe alarm code is displayed

AutomaticIf the resistive value returns within the envisaged range.

P2 Alarm of probe BEWOT




P3 Alarm of probe BCP1

Probe damaged or resistive value / power value out of range



P4 Alarm of probe BWOT




A01 High pressure switch alarm or Phase Monitor tripping

Digital input / high pressure switch enabled or Phase Monitor digital input tripping.Possible tripped transformer fuse or relay malfunction.

“open collector” outlet / alarm relay is activatedThe buzzer is activatedThe icon for high pressure alarm flashesThe alarm code is displayed

ManualWhen the pressure value has returned to normal or the alarm signalled by the Phase Monitor has been resolved, the manual reset procedure can be followed.

A02 Low pressure switch alarm

Digital input / low pressure switch enabled

“open collector” outlet / alarm relay is activatedThe buzzer is activatedThe icon for low pressure alarm flashesThe alarm code is displayed

AutomaticIt becomes manual after the value set of “tripping per hour” ManualThe digital input is disabled and the resetting procedure is carried out

A05 High temperature High pressure

Analogue input enabled if BCP1 or BWOT > then “set value”


ManualDisabled if BCP1 or BWOT < “set value” and the resetting procedure is carried out


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A06 Low pressure / temperature alarm

Analogue input enabled if BCP1 or BWOT < “set value”


ManualDisabled if BCP1 or BWOT > “set value” and the resetting procedure is carried out

A07 Antifreeze alarm Digital input enabled if BEWOT < “set value” and actives for the “time set”


AutomaticIt becomes manual after “tripping per hour” ManualDisabling:- when the antifreeze regulation probe BEWOT > (AR03+AR04) in chiller modality; and resetting procedure

NOTETo lower the freeze protection setpoint, contact the MTA after-sales service and add a suitable amount ofantifreeze solutions to the system (see chap. 5.3 “Antifreeze protection” ).

A07 Antifreeze alarm Digital input enabled if


AutomaticIt becomes manual after “tripping per hour” ManualDisabling: digital input not enabled resetting procedure

A07 Antifreeze alarm motocondensing units

Digital input enabled


AutomaticIt becomes manual after “alarms interventions” Manual Disabling:digital input disabled and the resetting procedure is carried out

A08 Flow meter alarm (air/water or water/water units)

Digital input enabledenabled for “time set”

“open collector” outlet / alarm relay is activatedThe buzzer is activatedThe icon for flow meter alarm flashesThe alarm code is displayed

AutomaticIt becomes manual after “tripping per hour” (AL05) ManualDisabling:Digital input disabled for “time set” and reset procedure

A09 Compressor 1 thermal alarm



ManualDigital input disabled and the resetting procedure is carried out

A10 Compressor 2 thermal alarm


“open collector” outlet / alarm relay are activatedThe buzzer is activatedThe icon for general alarm flashesThe alarm code is displayed

ManualDigital input disabled and the resetting procedure is carried out

A09-A10

Compressor1-2 thermal alarm

The alarm is visualized but not enabled during “compressor thermal delay time”after compressor start up

Relay alarm + buzzer activated If ID is not activatedManualTo reset the alarm enter the programming



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A13 Compressor 1 maintenance alarm

Operating hours > “set threshold”


ManualOperating hours reset

A14 Compressor 2 maintenance alarm

Operating hours > “set threshold”

“open collector” outlet / alarm relay are activatedThe buzzer is activatedThe alarm code is displayed

ManualOperating hours reset

A15 Water pump / outlet fan (air/air) maintenance alarm

Operating hours> “set threshold”


ManualOperating hour reset

A20 Low water temperature alarm at evaporator outlet

Only units operating if the temperature measured by BEWOT is lower than AL23

“open collector” outlet / alarm relay activatedThe buzzer is activatedThe alarm code is displayed

Automatic

A21 High water temperature alarm at evaporator outlet

Only units operating if the temperature measured by BEWOT is higher than AL24


Automatic

rtC Clock alarm Clock to be regulated


ManualClock regulation and resetting procedure

rtF Clock alarm Clock damagedClock malfunction


ManualResetting procedureIf after resetting the alarm persists replace the clock

EE Eeprom error alarm

Memory data lost “open collector” outlet / alarm relay are activatedThe buzzer is activatedThe icon for general alarm flashesThe alarm code is displayed

ManualResetting procedureIf after resetting the alarm persists the device remains blocked

ACF2 Configuration alarm

Condensation control probe not configured.


AutomaticWith correct re-programming


Two digital inputs with the same configuration




CF28=1 and the digital input not configured or CF28=2 probe BWOT different from 3





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7 . 1 8 O u t l e t b l o c k i n g


CF02=1 and (CF04 2,3 and CF05 3) or (CF04=2 and CF05=3) If CF02=1



FErr Operating manual CF04=3 and CF05=2 with digital inputs simultaneously activated

The buzzer is activatedThe icon for general alarm flashes

ManualDisabling of the not active digital inputs + reset procedure

AFr Net frequency alarm

Net frequency out of range


AutomaticNet frequency returns into operating range.

ALOC General alarm ID configured as unit blocked generic alarm “time set” AL21

The buzzer is activatedThe icon for general alarm flashes

ID configured as unit blocked generic alarm “fixed time” Automatic:It becomes manual after “tripping per hour set” (reset procedure in function menu).It is memorized in the alarm historic only with manual rearm

Alarm code Alarm Description Comp. 1 Comp. 2 Antifreeze

Resistances Pump Outlet Fan Cond. Fan

P1 BEWIT probe Yes Yes Yes with Ar19 =0

Yes

P2 BEWOT probe Yes Yes Yes with Ar19 =0

Yes

P3 BCP1 probe Yes Yes Yes with Ar19 =0

Yes

P4 BWOT probe Yes Yes Yes with Ar19 =0

Yes

A01 High pressure switch or Phase Monitor tripping

Yes Yes

A02 Low pressure switch Yes Yes YesA05 High temperature High

pressureYes Yes

A06 Low pressure Low temperature

Yes Yes Yes

A07 Analogue input antifreeze Yes Yes YesA07 Digital input antifreeze Yes Yes YesA07 Motorcondensing

antifreezeYes Yes Yes Yes

A08 Flow meter Yes Yes Boiler Res.Yes

Yes

A09 Outlet fan thermal protection CF01= 0,1

Yes

A10 Compressor 1 thermal protection

Yes

A09-A10 Compressor 1-2 thermal protection

Yes Yes Yes

A13 Compressor 1 maintenanceA14 Compressor 2 maintenanceA15 Water pump maintenance



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7 . 1 9 P a r a m e t e r s d e s c r i p t i o n7.19.1 Thermoregulation parameters

7.19.2 Configuration parameters

A20 Low water temperature alarm BEWOT

A21 High water temperature alarm BEWOT

rtC Clock alarmrtF Clock alarmEE Eeprom error Yes Yes Yes Yes Yes YesACF2 Configuration alarm Yes Yes Yes Yes Yes YesACF3 Configuration alarm Yes Yes Yes Yes Yes YesACF4 Configuration alarm Yes Yes Yes Yes Yes YesACF5 Configuration alarm Yes Yes Yes Yes Yes YesACF6 Configuration alarm Yes Yes Yes Yes Yes YesFErr Error during operation

(motocond.)Yes Yes Yes Yes Yes Yes

Afr Net frequency alarm Yes Yes Yes Yes Yes YesALOC Generic alarm Yes Yes Yes Yes Yes Yes

Parameters Description

ST01 It allows to fix the operating set point during chiller operation (from ST05 to ST06)

ST02 It allows to fix the differential during chiller operation

ST03 It allows to fix the operating set point during heat pump operation (from ST07 to ST08)

ST04 It allows to fix the differential during heat pump operation

Pr2 Password: it allows to set the numeric code of the password (from 0 to 999)


CF02 Motocondensing unit:• 0= Not• 1= Yes

CF03 It allows to select the probe for thermoregulation:• 0= Regulates on BEWIT probe• 1= Regulates on BEWOT probe

Alarm code Alarm Description Comp. 1 Comp. 2 Antifreeze

Resistances Pump Outlet Fan Cond. Fan


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CF04 Configuration of analogue input BEWIT:• 0= Probe absent• 1= NTC temperature probe evaporator water inlet (ambient air to be conditioned). It appears

in the upper part of the display.• 2= Digital input (for units configured as motorcondensing).

According to the selected polarity, with energized contact, it puts the unit in stand-by and starts it. ON is displayed in the upper part. With de-energized contact the unit is in stand-by, OFF is displayed in the upper part. If ON appears in the upper part of the display, using UP-DOWN buttons it is possible to select the operating modality (chiller - heat pump). During chiller modality: with CF21=2 and CO08=1 compressor 1 starts, with CF21=2 and CO08=0 a compressor required by the thermoregulator starts. “OnC” is displayed in the upper part.During heat pump modality: with CF21=2 and CO08=1 compressor 1 starts, with CF21=2 and CO08=0 compressor required by the thermoregulator starts. “OnH” is displayed in the upper part.When the modality has been chosen, the digital input enabling or disabling will switch on or off the unit and the appropriate loads (compressor). Only when the contact is energized, if the unit was switched off by keyboard, it must be switched on again by keyboard.

• 3= Digital input (for units configured as motorcondensing), according to the selected polarity it gives the possibility to switch on the unit in chiller modality ONLY.With de-energized contact, unit in stand-by, OFF displayed in the upper part.With energized contact, unit in chiller operation. “OnC” displayed in the upper part.The digital input enabling or disabling will switch on or off the unit and the appropriate loads (compressor).Only when the contact is energized, if the unit was switched off by keyboard, it must be switched on again by keyboard.

CF05 Configuration of analogue input BEWOT:• 0= Probe absent• 1= NTC temperature probe evaporator water outlet / evaporator air outlet.

It appears in the upper part of the display.• 2= It becomes a digital input which, according to the selected polarity, generates the

antifreeze alarm.• 3= Digital input (for unit configured as motorcondensing).

According to the selected polarity it gives the possibility to switch on the unit in heat pump modality ONLY.With de-energized contact, unit in stand-by, OFF displayed in the upper part.With energized contact, unit in chiller operation.“OnH” displayed in the upper part.The digital input enabling or disabling will switch on or off the unit and the appropriate loads (compressor).Only when the contact is energized, if the unit was switched off by keyboard, it must be switched on again by keyboard.

CF06 Configuration of analogue input BCP1:• 0= Probe absent• 1= NTC temperature probe for the control of the condensation fan speed regulation.

It appears in the lower part of the display.• 2= Input 4÷20mA, condensation pressure. It is the transducer for the control of the

condensation fan speed regulation.It appears in the lower part of the display.

• 3= Input 4÷20mA, dynamic set point. It enables the operation of the dynamic set point according to a proportional signal fixed by the user.

• 4= NTC temperature probe condenser antifreeze alarm (water/water or LASER).It appears in the lower part of the display.



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CF07 Configuration of analogue input BWOT:• 0= Probe absent• 1= NTC temperature probe for the control of the condensation fan speed regulation.

It appears in the lower part of the display.• 2= Adjustable digital input• 3= NTC temperature probe which measures the external air temperature. It enables the

management of the dynamic set point, of boiler function and of automatic “change-over”.• 4= NTC temperature probe condenser antifreeze alarm (water/water or water/water with heat

pump).It appears in the lower part of the display.

• 5= NTC temperature probe which measures the evaporating coil temperature during heat pump operation, it allows the management of combined defrosting cycle. It fixes the starting and stopping of defrosting cycle.

• 6= NTC probe, used to measure only one temperature

CF11 Configuration of analogue input BWOT, if configured as digital input:• 0= Compressor 1 thermal protection, according to the selected polarity the enabled input

generates a compressor thermal protection alarm.• 1= Condensation fan thermal protection, according to the selected polarity the enabled input

generates a condensation fan thermal protection alarm.• 2= Outlet fan thermal protection (air/air units) / Flow meter thermal protection (water/air or

water/water units). According to the selected polarity and to the unit configuration, the enabled input generates an outlet fan thermal protection alarm or a flow meter thermal protection alarm.

• 3= remote ON / OFF, according to the selected polarity the enabled input generates the remote OFF. It is possible to switch on or off the unit by keyboard only when the input is disabled.

• 4= Remote chiller / heat pump. It is possible to switch on or off the unit only during the selected operating modality (see the section about the way to select the operating modality, parameter CF28=1).

• 5= Compressor 2 thermal protection, according to the selected polarity the enabled input generates a compressor thermal protection alarm

• 6= Compressor 2 / capacity step required, according the selected polarity (unit configured as motorcondensing) the enabled input switches on or off a compressor or the capacity control solenoid valve.

• 7= Defrosting end, according to the selected polarity the enabled input fixes the defrosting cycle end.

• 8= Energy Saving, according to the selected polarity the enabled input fixes the unit operation with the set point of Energy Saving.

• 9= Antifreeze alarm, according to the selected polarity the enabled input generates the antifreeze alarm (also when the unit is configured as motorcondensing).ID3= high pressure switch input (not adjustable). According to the selected polarity the enabled input generates the condensation high pressure alarm.ID4= low pressure switch input (not adjustable). According to the selected polarity the enabled input generates the evaporation low pressure alarm.

• 10= Compressor thermal 1 and 2.• 11= Generic alarm

CF28 t allows to select the operating modality (chiller / heat pump) by keyboard or by digital / analogue input:• 0= Selection by keyboard which has the priority on the digital / analogue input.• 1= Selection by digital input. The selection is enabled if a digital input is configured as 4

(remote chiller / heat pump). If the polarity of the digital input is 0: the “opened” status forces the unit to chiller operation, the “closed” status to heat pump operation. If the polarity of the digital input is 1: the “opened” status forces the unit to heat pump operation, the “closed” status to chiller operation. If no digital input has been configured to 4, the unit remains in stand-by. The selection to chiller or heat pump by keyboard is disabled. It is possible to switch on or off the unit by keyboard only during the selected operating modality.

• 2= Selection by analogue input, it has the priority on the digital input. In the event of external air temperatures included in the differential CF30, it is possible to change the operating modality by keyboard.

Both with CF28=1 and CF28=2, if the unit is operating as chiller or as heat pump and the modification of the operating modality is required, the controller stops all the outlets and wait for a certain delay time (fix), signalled by the chiller led or heat pump led flashing. The flashing led indicates the operating modality used when the unit will be restarted, respecting the protection time of the compressor.

CF34 Serial address



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CF36 It allows to select the default displaying of the top and bottom:• 0= BEWIT temperature is displayed in the top• 1= BEWOT temperature is displayed in the top• 2= no displaying in the top• 3= BWOT temperature is displayed in the top• 4= unit set point is displayed in the top (*)• 5= unit status is displayed in the top (**)• 6= Laser set is displayed in the top• 7= no displaying in the top• 8= the operating differential is displayed in the top

(*) the chiller set is displayed when the unit is in chiller modality, the heat pump set when the unit is in heat pump modality or off with stand-by unit(**) OnC is displayed when the unit is in chiller modality, OnH when the unit is in heat pump modality or off with stand-by unit.

CF42 It allows to select the default displaying of the bottom:• 0= BEWIT temperature is displayed in the bottom• 1= BEWOT temperature is displayed in the bottom• 2= BCP1 temperature is displayed in the bottom• 3= BWOT temperature is displayed in the bottom• 4= unit set point is displayed in the bottom (*)• 5= unit status is displayed in the bottom (**)• 6= Laser set is displayed in the bottom• 7= no displaying in the bottom• 8= the operating differential is displayed in the bottom


CF43 It allows to select the default displaying of the top by remote control:• 0= BEWIT temperature is displayed in the top• 1= BEWOT temperature is displayed in the top• 2= no displaying in the top• 3= BWOT temperature is displayed in the top• 4= unit set point is displayed in the top (*)• 5= unit status is displayed in the top (**)• 6= Laser set is displayed in the top (NOT ENABLED FUNCTION)• 7= no displaying in the top• 8= the operating differential is displayed in the top


CF44 It allows to select the default displaying of the bottom by remote control:• 0= BEWIT temperature is displayed in the bottom• 1= BEWOT temperature is displayed in the bottom• 2= BCP1 temperature is displayed in the bottom• 3= BWOT temperature is displayed in the bottom• 4= unit set point is displayed in the bottom (*)• 5= unit status is displayed in the bottom (**)• 6= Laser set is displayed in the bottom• 7= no displaying in the bottom• 8= the operating differential is displayed in the bottom


Pr2 Password: it allows to fix a numeric code for the password (from 0 to 999)



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7.19.3 Dynamic set point parameters (NOT ENABLED FUNCTION)

7.19.4 Energy Saving parameters (NOT ENABLED FUNCTION)

7.19.5 Compressor parameters

7.19.6 Venti lat ion parameters (NOT ENABLE FUNCTION)

7.19.7 Antifreeze support boiler resistance parameters (NOT ENABLE FUNCTION)

7.19.8 Defrosting parameters (NOT ENABLED FUNCTION)

7.19.9 Alarm parameters

7.19.10 LASER operating parameters (NOT ENABLE FUNCTION)














AL19 Antifreeze alarm:• 0= related to the parameters Ar16 in chiller modality - Ar17 in heat pump modality.• 1= BEWIT probe• 2= BEWOT probe• 3= BCP1 probe• 4= BWOT probe


Parameter Description



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7 . 2 0 P a r a m e t e r s e t t i n gAll adjustable parameters and their level are listed below:U= user levelS= service level

ATTENTION

It is important to follow these indication in order to avoid a wrong operation of unit.

7.20.1 Thermoregulation parameters

7.20.2 Configuration parameters

Parameter Level Description Min. Max. Udm Resolution Factory settingST01 U Summer set point ST05 ST06 °C

°FDecInt

09.0

ST02 U Summer differential 00.000.0

25.045.0

°C°F

DecInt

03.0 (mod. 018÷150)02.0 (mod. 200÷600)

ST03 U Winter set point ST07 ST08 °C°F

DecInt

45.0

ST04 U Winter differential 00.000.0

25.045.0

°C°F

DecInt

03.0 (mod. 018÷150)02.0 (mod. 200÷600)

Pr2 Password 0 999 - -

Parameter Level Description Min. Max. Udm Resolution Factory settingCF02 U Motorcondensing unit:

0= NOT1= YES

0 1 0

CF03 U Regulation probe:0= regulation on BEWIT probe1= regulation on BEWOT probeSee paragraph 5.4 “Hydraulic connections”.

0 1 1

CF04 U BEWIT configuration:0= probe absent1= NTC temperature at evaporator inlet2= thermoregulator request digital input3= cold request digital input

0 3 1

CF05 U BEWOT configuration:0= probe absent1= NTC temperature at evaporator outlet2= antifreeze alarm digital input3= warm request digital input

0 3 1

CF06 U BCP1 configuration:0= probe absent1= NTC temperature condensation control2= In 4.20ma condensation pressure3= In 4.20ma dynamic set point4= NTC temperature antifreeze alarm (water/water unit)See chapter 8.6 “Modulating valve (KIT)”.

0 4 0 (mod. 018÷150)2 (with modulating valve kit OCT100-130-150)2 (mod. 200÷600)


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CF07 U BWOT configuration:0= probe absent1= NTC temperature condensation control2= In multi function digital3= external air temperature4= NTC temperature antifreeze alarm (water/water unit)5= NTC temperature defrosting6= NTC temperature recording

0 6 4

CF11 U BWOT configuration if selected as digital input:0= compressor 1 thermal protection1= pump thermal protection2= outlet fan / flow meter thermal protection3= remote on/off4= cool/heat5= compressor 2 thermal protection6= compressor 2 / step request7= defrosting end8= Energy saving9= antifreeze alarm10= compressor 1and 2 thermal protection11= generic alarm

0 11 8

CF28 U Chiller / heat pump selection:0= keyboard1= digital input2= analogue input

0 2 0 by keyboard1 with remote digital input CH/HP

CF34 U Serial address 1 247 1CF36 U Default displaying of top part:

0= BEWIT1= BEWOT2= none3= BWOT4= unit setpoint (*)5= unit status (**)6= Laser set7= none8= operating differential(*) the chiller set is displayed when the unit is in chiller modality, the heat pump set when the unit is in heat pump modality or off with stand-by unit(**) OnC is displayed when the unit is in chiller modality, OnH when the unit is in heat pump modality or off with stand-by unit.

0 2 1

CF42 U Default displaying of bottom part:0= BEWIT1= BEWOT2= BCP13= BWOT4= unit setpoint (*)5= unit status (**)6= Laser set7= none8= operating differential(*) the chiller set is displayed when the unit is in chiller modality, the heat pump set when the unit is in heat pump modality or off with stand-by unit(**) OnC is displayed when the unit is in chiller modality, OnH when the unit is in heat pump modality or off with stand-by unit.

0 8 3

Parameter Level Description Min. Max. Udm Resolution Factory setting


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7.20.3 Dynamic Set-Point Parameters (NOT ENABLE FUNCTION)

7.20.4 Energy Saving Parameters (NOT ENABLE FUNCTION)

7.20.5 Compressor parameters

7.20.6 Fan parameters (NOT ENABLE FUNCTION)

CF43 U Default displaying of top part by remote control:0= BEWIT1= BEWOT2= none3= BWOT4= unit setpoint (*)5= unit status (**)6= Laser set7= none8= operating differential(*) the chiller set is displayed when the unit is in chiller modality, the heat pump set when the unit is in heat pump modality or off with stand-by unit(**) OnC is displayed when the unit is in chiller modality, OnH when the unit is in heat pump modality or off with stand-by unit.

0 8 1

CF44 U Default displaying of bottom part by remote control:0= BEWIT1= BEWOT2= BCP13= BWOT4= unit setpoint (*)5= unit status (**)6= Laser set7= none8= operating differential(*) the chiller set is displayed when the unit is in chiller modality, the heat pump set when the unit is in heat pump modality or off with stand-by unit(**) OnC is displayed when the unit is in chiller modality, OnH when the unit is in heat pump modality or off with stand-by unit.

0 8 3

Pr2 Password 0 999 -

Parameter Level Description Min. Max. Udm Resolution Factory settingPr2 Password 0 999 -




Parameter Level Description Min. Max. Udm Resolution Factory setting


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7.20.7 Antifreeze resistance/supply parameters (NOT ENABLE FUNCTION)

7.20.8 Defrosting parameters (NOT ENBALE FUNCTION)

7.20.9 Alrm parameters

7.20.10 LASER parameters (NOT ENABLE FUNCTION)

7 . 2 1 P r o b e d e s c r i p t i o nFor the positioning of the BEWIT, BEWOT, BCP1 and BWOT probes, see annexes.Here below you can find the descriptions of the probes



Parameter Level Description Min. Max. Udm Resolution Factory settingAL19 U Antifreeze alarm:

0= depends on Ar16 parameters in Chiller modality- Ar17 in heat pump modality1= BEWIT probe2= BEWOT probe3= BCP1 probe4= BWOT probeSee paragraph 5.4 “Hydraulic connections”.

0 4 2 without hydraulic group1 with hydraulic group

Pr2 Password 0 999 -


Code in the drawings

Code in the manual / Connector name Description

BEWIT PB1 Evaporator water inlet temperature probeBEWOT PB2 Evaporator water outlet temperature probe

BCP1 PB3 High pressure transducer (only OCT/ME-OCT 200÷600)Not utilized (only OCT/ME-OCT 018÷150)

BWOT PB4 Condenser water outlet temperature probe

OPERATING AND MAINTENANCE MANUALOther components

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CHAPTER 8

OTHER COMPONENTS8 . 1 C o m p r e s s o r i n t e g r a l p r o t e c t i o n ( P I )

This protection consists of three or six thermostatic sensors, each sunk in the winding of one motor phase; they are connected together in series and their terminals are taken to the outside.This system ensures complete protection against most of the problems which can give rise to burning of the windings. When it trips, it is necessary to find and eliminate the cause; then you can start the machine again.

8 . 2 R e f r i g e r a n t h i g h a n d l o w p r e s s u r e s w i t c h e sThe units are fitted with the following pressure switches:

1. low pressure switch (LP)This monitors refrigeration compressor intake pressure and will trip to avoid that values dangerous for compressornormal operation are reached.It is of an “automatic reset” type.The alarm A02 (see chapter 7.17 “Alarm codes and actions”), produced by this pressure switch tripping, an have adelay time after the compressor starting, to avoid simple intake pressure fluctuations or false alarms interfere withthe unit normal operation.After the time set, the pressure switch tripping will be detected by the electronic board which will display thealarm signal A02 (see chapter 7.17 “Alarm codes and actions”) band will stop the compressor/s and fan/s whilethe pump (if it is installed) will continue to operate.After the alarm tripping, if the compressor intake pressure increases and exceeds the pressure switch trippingvalue it will restart.It will be possible to start up the unit again following the alarm reset procedure described in Chapter 7 “ElectronicBoard”.If the cause of the pressure switch tripping has not removed this cycle will repeat continuously.

2. high pressure switch (HP)They assure an electromechanical protection add to the transducer protection (where installed) of the electroniccontrol.They check the refrigeration compressor delivery pressure and they prevent the pressure to reach dangerousvalues.For the pressure switch model see the table below.• Each unit is equipped with “Type Approved” high pressure switch of “automatic reset” type.Its tripping is

checked by the electronic control that will open the compressor power supply circuit and will display the alarm signalling A01 (see chapter 7.17 “Alarm codes and actions”).When the compressor delivery pressure drops below the reset point it is automatically reset and it is possible to start up the unit following the alarm reset procedure described in Chapter 7 “Electronic Board”.

• Only the OCT/ME-OCT 500÷600 model is equipped with a “Safety” pressure switch, that is of “manual reset” type.Each unit is equipped with a “Safety” high pressure switch for each circuit and it is of “manual reset” type.Its intervention open the compressor feeding (see the wiring diagram).When the compressor delivery pressure drops below the reset point it have to be reset manually, if it is possible switch on the unit again.

The pressure switches LP and HP are screwed to the refrigerant circuit piping with SCHRAEDER valves (with needle) which prevent leakage during replacement.The TRIP and RESET values of the pressure switches depend upon the refrigerant gas used and are listed in the table below:

MODEL COMPONENT REFRIGERANTTRIP RESET

bar °C °F bar °C °F

All modelsType Approved

Pressure switches HP

R410A

39 62.4 144.5 30.4 51.5 124.8

OCT/ME-OCT 500÷600

HP-Safety pressure switches 40.4 64.1 147.3 36.4 59.4 138.9

All models Low Pressure switch LP 3.4 -17.5 0.4 5 -8.7 16.4


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8 . 3 P r e s s u r e t r a n s d u c e r sSome models (OCT/ME-OCT 100÷600) are furnished with a low pressure transducer in the refrigerant circuit.Measuring the inlet and outlet pressures of the compressors, they control the unit operation, according to the pressure setpoint values adjusted by the electronic control.With these values it is possible to control the following functions of each circuit separately:

• high pressure alarm;• unloading for high or low pressure;• high pressure values measurement;• modulating valve (if present).

Therefore, if the pressure in a circuit increases over or decreases lower than the preset limits, an alarm signal will occur and will stop the unit the stopping - with a certain delay - of one or more compressors.

8 . 4 W a t e r d i f f e r e n t i a l p r e s s u r e s w i t c hThe machine is provided with a differential pressure switch which measures the difference in the pressure of the water between the inlet and outlet manifold of the evaporator.When the pressure switch measures a p lower than 50 mbar (500 mmH2O), it sends an alarm signal to the electronic control which stops the machine after the preset delay.When the p returns above 50 mbar it is possible to restart the machine.

8 . 5 W a t e r r e g u l a t i n g v a l v e ( K I T )See the wiring diagrams enclosed in the KIT to have more information.The water valve can be installed before the condenser in units OCT 018÷070 with city water and OCT 018÷230 with well water.

NOTEThe installation of the “WATER VALVE KIT” have to be carried out by the customer.

The water regulating valve must be set by means of the knob to operate with the following values:

NOTEThe setting regards the unit working in normal condition.

REFRIGERANTPRESSURE TEMPERATURE

[bar] [°C] [°F]

CITY WATER R410A 23 40.0 104

WELL WATER R410A 20.2 35.0 95

main components:1 Knob2 Cup spring3 O-Ring4 Bellows sensorThe water regulating valve, on models with water cooled condenser, needs to be checked regularly because impurities in the water could cause it to malfunction.This valve is equipped with a knob [1] to permit adjustment of the set point

operating principle:The pressure signal arrives at the bellows [4] which, via the main valve rod, causes the valve to open and close. The resistance of the spring opposing the operation of the bellows, can be regulated by means of the knob [1]. In this way the differential pressure necessary for the opening of the valve is adjusted.


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Water regulating valve connection diameters:

8 . 6 M o d u l a t i n g v a l v e ( K I T )The two-way modulating valve is servo-assisted and it serves to regulate the flow of cooling water to the condenser in accordance with the pressure values read by the transducers. This valve is managed by the electronic controller and it does not require connection to the high pressure refrigerant circuit.The modulating valve is furnished as KIT and can be installed before the condenser in OCT 280÷600 units with well water and in OCT 100÷600 units with city water.

NOTEThe setting regards the unit working in normal condition.

Unit modelCITY WATER WELL WATER

Water regulating valve connections

Water regulating valve connections

OCT/ME-OCT 018 G 1/2” G 1/2”

OCT/ME-OCT 022 G 1/2” G 1/2”

OCT/ME-OCT 030 G 1/2” G 1/2”

OCT/ME-OCT 040 G 3/4” G 1/2”

OCT/ME-OCT 050 G 1” G 1/2”

OCT/ME-OCT 070 G 1” G 1/2”

OCT/ME-OCT 100 - G 3/4”

OCT/ME-OCT 130 - G 3/4”

OCT/ME-OCT 150 - G 3/4”

OCT/ME-OCT 200 - G 1”

OCT/ME-OCT 230 - G 1”

REFRIGERANTIntervention Set-point Differential

bar °C °F bar °C °F

CITY WATERR410A

23 40.0 104 2 -27.8 -18.1

WELL WATER 20.2 35.0 95 2 -27.8 -18.1

Opening

Chiller

Condensation P


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NOTEFor OC 100-130-150 models enable the pressure transducer if the modulating valve kit is present (change the CF06parameter from 0 to 2).

The modulating valves ensure operation up to the following differential pressure regulation and closing values:

8 . 7 S a f e t y v a l v e ( o n l y O C T / M E - O C T 5 0 0 ÷ 6 0 0 )It protects the unit from too much high pressure that could be dangerous for the machine and for the people within the vicinity.When the pressure of the cooling fluid runs over the intervention value (see the table below), the valve opens the circuit and discharges the gas, till the pressure goes back to the prefixed values.The valve automatically closes.It is of fixed setting type, and it is positioned on the high pressure side (see the diagrams enclosed), and its calibration is related to the design pressure of the weaker component.

ATTENTION

Do not remove or tamper the safety valve.

ATTENTION

The intervention of the safety valve means that the machine does not work in the right way.Spot the problem and restore the normal conditions.

DN Kvs Max. regulation differential pressure Max closing differential pressure

[inches] [m3/h] [bar] [bar]

1” 8 2 6,5

1” 1/4 16 2 4

1” 1/2 22 2 2,5

For installations that require higher regulation or closing differential pressures use balanced modulating valves.Operating pressure: 16 bar.Min/max operating temperature values: -10°C/150°C

NOTEThe data shown are purely guideline. Always refer to the offer data.

COMPONENT REFRIGERANTTRIP

bar

Safety valve R410A 41.5

CO

ND

ENSE

R

Modulating valve

For the following models:- OCT/ME-OCT 100÷600 with city water

Water outlet

Water inlet

OPERATING AND MAINTENANCE MANUALOperation and maintenance

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CHAPTER 9

OPERATION AND MAINTENANCE9 . 1 O p e r a t i o n

The machine operates in completely automatic mode.There is not necessary to turn it off when there is no thermal load as it turns off automatically when the preset water outlet temperature has been reached.

ATTENTION

Never exceed the water flow values specified in the table in chapter 5.4 “Hydraulic connections”.Never turn off the water circuit circulation pump before turning off the machine.

9 . 2 M a i n t e n a n c eATTENTION

Before proceeding with the installation or the maintenance of these units be sure that all personnel concerned have readand understood the chapter " Safety".

ATTENTION

Given the presence of sharp and cutting edges in the rear compartment, the maintenance technician must protect himselffrom accidental contact during work inside the compartment.Furthermore, care must be taken with the floor of the compartment as it may be wet and slippery.

These units will give many years of trouble-free service if they are properly maintained and serviced.

9.2.1 Access to the unit(See annexes)

ATTENTION

The inside of the power board must only be accessed with the machine off.

In the event of maintenance operations it is possible to remove the protection panels.Here below you can see the panels you can remove:


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OCT/ME-OCT 018÷150

Unit without hydraulic group KIT Unit with hydraulic group KIT

• to access the refrigerant circuit and electronic board components set the main switch on “O” and remove the panel (A).

• if the unit is equipped with the hydraulic group kit, it is possible to access the water circuit removing the panels (B and (C).

To remove the panel (A) turn the bolts with the provided key.To remove the other panels use a screwdriver to unscrew the screws.

OCT/ME-OCT 200÷350


• to access the refrigerant circuit remove the panels (A) and (B).• to access the electric board components set the main switch on “OFF” and open the electric board panel

(C).• if the unit is equipped with hydraulic group kit, it is possible to access the circuit removing the panels

(D), (E) and (F).To remove the panel (A) and (C) turn the bolts with the provided key.To remove the other panels use a screwdriver to unscrew the screws.

A

ABC

AB

C

A

BDEF

C


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9.2.2 Water circuit emptyingIn the event of maintenance operations which require the water circuit emptying, you can do it in the following ways:

• using the provided cocks (as suggested in paragraph 5.4 “Hydraulic connections”).• using the delivery pipeline (if the cocks are not provided).• the units equipped with the hydraulic group kit are furnished with a cock to empty the hydraulic circuit.

ATTENTION

The water circuit emptying operation becomes indispensable when the unit is without antifreeze resistance and mustremain OFF for a long time in an ambient with temperatures which could reach the freezing values of water inside theevaporator (risk of evaporator breaking).

OCT/ME-OCT 400÷600


• to access the refrigerant circuit remove the panels (A) and (B).• to access the electric board components set the main switch on “OFF” and open the electric board panel

(C).• if the unit is equipped with hydraulic group kit, it is possible to access the circuit removing the panels

(D), (E) and (F).To remove the panel (A) and (C) turn the bolts with the provided key.To remove the other panels use a screwdriver to unscrew the screws.

Plate evaporators:

During installation, a drain tap should be fitted on the line outside the unit (by customer).Once the water has been drained from the tap on the outside line, use a compressed air jet inside the exchanger to remove all water residue.

A

B

C

ABDEF

C


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9 . 3 M a i n t e n a n c e s c h e d u l e

ATTENTION

This plan is based on an average working situation.In some installations it may be necessary to increase the frequency of maintenance.

OPERATION 1Day

1Month

6Months

1Year

Check for any alarm signals.

Check that the water outlet temperature is within the envisaged range.

Check that the utilisation water inlet temperature is within the unit capacities.

Check that the water intake temperature is lower than the value used for selecting the chiller.

Check that the liquid indicator is full or with a small stream of bubbles when the compressor is running.

Check that the unit current absorption is within the value on the data plate.

Carry out visual inspection of refrigerant circuit, looking out for any deterioration of the piping or any traces of oil which might indicate a refrigerant leak.

Check the condition and security of piping connections.

Check the condition and security of wiring and electrical connections.

Compressors oil level with unit off and stabilized oil

OPERATING AND MAINTENANCE MANUALTrouble shooting

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CHAPTER 10

TROUBLE SHOOTING

PROBLEM CAUSE SYMPTOM REMEDYA

Water outlet temperature BEWOT higher than the expected.

A1Thermal load too high.

A1.1BEWOT temperature higher than the expected value;.

Restore the thermal load within the preset limits.

A2Condenser water temperature too high

A2.1See A1.1

Reduce the water temperature within design limits

A3No refrigerant fluid in the plant.

A3.1• See A1.1;• evaporation pressure;• if the flow indicator is

present, check if there are a lot of bubbles.

Get a technician to check for leaks and eliminate them.Fill the plant.

A4Compressor protection trips.

A4.1• The head and the body of the

compressor are very hot;• the compressor stops and

tries to restart after a short period (even a few seconds).

Get a technician to check for leaks and eliminate them.Fill the plant.

BLow head values (water pressure) at pump delivery.

B1Water flow too high. The pump doesn’t work properly (water flow too high, low head value, high power absorption).

B1.1• Possible increase in the

outlet temperature BEWOT (See A1.1);

• with pump installed on the machine: pressure difference, read on the machine pressure gauge, too low with pump stopped and pump running

• pump thermal regulator trips.

Restore the flow within the preset limits, e.g. by partially closing the pump outlet cock.Reset the pump thermal protection device and check the electrical absorption.

B2See point D. Before ice obstructs the whole evaporator, there is an increase in the head losses.

B2.1See point D.

See point D.

B3Evaporator obstructed by dirt carried by the water to be cooled.

B3.1High water temperature difference between inlet and outlet.

Depending on the type of dirt:• clean the evaporator by

running a detergent solution which is not aggressive for steel and copper;

• run a high water flow against the stream.

Install a filter upstream from the unit.


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CWater differential pressure switch FLOW alarm trips.

alarm displayed:A08

C1The filter upstream from the unit is obstructed, if installed.

C1.1• Water does not flow.

Pressure difference between inlet and outlet lower than 25mbar.

• Alarm displayed: A08.• main alarm relay tripped.

Clean the upstream filter, if installed. Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

C2The pump is defective or rotate in the wrong direction. (three-phases supply)

C2.1• See C1.1;• main alarm relay tripped.

Check the pump electrical supply and, if it is necessary, invert the two phases. Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

C3Water inlet-outlet inverted (units without hydraulic kit).

C3.1• See C1.1;• main alarm relay tripped.

Invert the water inlet-outlet.Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

DHigh pressure switch or alarm trips (HP)

Alarm displayed:A01

D1Condenser water inlet temperature too high.

D1.1• Refrigeration compressor

stops;• the alarm A01 alternate with

the value of the BEWIT probe;

• main alarm relay tripped;• the led of the lights up;

Reduce the water temperature within design limits.Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

D2Condenser cooling water flow to low.

D2.1See D1.1

Increase the unit pressure to increase the cooling water flow.Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

D3Front surface of the condenser dirty.

D3.1See D1.1

ID depending on the type of dirt:

• clean the evaporator by running a detergent solution which is not aggressive for steel and copper;

• run a high water flow against the stream.

Install a filter upstream from the unit.Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

D4Thermal load too high.

D4.1• Water outlet temperature too

high;• The refrigeration

compressor stop;• main alarm relay trip.

Reduce the thermal load to within the design limits. Follow the alarm reset procedure to star up the unit again (chapter " Electronic Board").

PROBLEM CAUSE SYMPTOM REMEDY


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ELow pressure switch or alarm trips (LP)

Alarm displayed:A02

E1No refrigerant fluid in the plant(see also A4).

E1.1• Refrigeration compressor

stops;• the alarm A02 alternate with

the value of the BEWIT probe;

• main alarm relay tripped.• the led of the lights up;

Call a qualified technician to check for leaks and replenish refrigerant charge.

E2The water upstream filter is dirty, if installed

E2.1See F1.1.

Clean or change the upstream filter, if installed.

FThe compressor protection device trips.

Alarm displayed:A09 or A10

F1Thermal load too high combined with a situation of refrigerant circuit unloaded (also see A4).

F1.1• The head and the body of the

compressor are very hot;• the compressor stops and

tries to restart after a short period (even a few seconds).

• The compressor protection device trips

• Alarm displayed A09 or A10

• The led of the icon lights up.

Call a qualified technician to check for leaks and replenish refrigerant charge.

F2The scroll compressor rotation direction is wrong (only three-phases units)

F2.1Refrigeration compressor stops the unit does not cool.

Invert two phases of the electrical supply.

GDigital display and all LEDs off, main switch P1 off (I)

G1The auxiliary board fuse trip.

G1.1Measuring with a tester the voltage at the transformer secondary winding connector, there will be not tension survey.

Check the causes of the fuse tripping.Replace the fuse.

G2Abnormal power consumption by one or more control board components.

G2.1Despite presence of power at the connectors of the control board, the display and all LEDs remain unlit.

Try to turn the unit OFF and ON again. If this doesn’t solve the problem, contact the nearest service centre.

HAlarm displayed:P1, P2, P3, P4

H1BEWIT, BEWOT, BCP1 or BWOT probes damaged.

H1.1• See problem;• main alarm relay tripped

Check that the temperature probe is correctly connected to the control board connectors and that the cable is undamaged. If necessary replace the temperature sensor.



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IAlarm displayed:A04

I1Water outlet temperature too low.The value of the parameter Ar03 is higher then than the value measured by the BEWOT probe.

I1.1• see problem;• The compressor stops and

restarts when the Ar03+Ar04 value is exceeded;

• main alarm relay tripped.• The led of the icon lights

up.

Identify and remove the cause of BEWOT temperature decreasing to a value lower than Ar03.

I2Water flow too low.

I2.1• See problem;• The compressor stops and

restarts when the Ar03+Ar04 value is exceeded;

• main alarm relay tripped.

Increase the water flow.

JAlarm visualized:A08pump thermal protection.

J1The thermal protection of the pump trips because the water flow is too high.

J1.1• See problem;• main alarm relay tripped;• the refrigeration

compressor and the pump stop;

• the alarm A08 alternate with the value of the BEWIT probe;

• the pressure difference read on the machine gauge with the pump stopped and pump running is lower than the available head with maximum pump flow.

Reset the thermal protection device.Increase the pressure drop in the hydraulic circuit, for example by partially closing the pump output valve.

J2The grille through which the pump cooling air passes is obstructed.


compressor and the pump stop.

Reset the thermal protection device. Free the grille.

J3The pump is defective.


compressor and the pump stop;

• the current absorbed by the pump is greater than the nominal rating;

• the pump may be noisy.

Reset the thermal protection device.Replace the pump.

KAlarmACF1,ACF2,ACF3,ACF4,ACF5

K1Configuration error.

K1.1ACFx blinks on the display and unit blocked

Turn off and turn on the unit. If this does not solve the problem, contact the nearest service centre.

LAlarmEE

L1The processor does not memorize the data in the right way

L1.1• The machine does not work• EE blinks on the display• The led of the icon lights

up.

Turn off and turn on the unit. If this does not solve the problem, contact the nearest service centre.


OPERATING AND MAINTENANCE MANUALRisk analysis: residual risk

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CHAPTER 11

RISK ANALYSIS: RESIDUAL RISK

Description of risk: Effect: User instructions:1. Risk of crushing Falling of machine onto persons and/or

crushing of limbs.Use lifting equipment suited to the task in hand, to be performed by qualified personnel with reference to the labelling instructions and manual.

2. Risk of cutting and detachment caused by sheets or profiles in general.

Risk of cutting upper limbs on sharp edges caused by shearing of sheets or saw cutting of profiles.

Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”.

3. Risk of cutting or detachment due to the finned surface of air-cooled condensers.

Risk of cutting upper limbs. Strictly observe all manual instructions. Chapter 1 “General information”; Chapter 2 “Safety” and Chapter 9 “Operation and maintenance”.

4. Risk of cutting or detachment due to fan blades.

Risk of cutting or detachment. Strictly observe all manual instructions. Chapter 1 “General information”; Chapter 2 “Safety” and Chapter 9 “Operation and maintenance”.

5. Risk of high pressure fluid ejection from pipelines and/or pressure tanks in cooling circuit due to accidental bursting.

Contact of body parts with refrigerant gas or parts of cooling circuit pipelines launched at high speed.

Strictly observe all manual instructions. Chapter 2 “Safety” and Chapter 5 “Installation”

6. Risk of high pressure fluid ejection from pipelines and/or pressure tanks in cooling circuit due to design pressure values being exceeded.

Contatto di parti del corpo con gas frigorigeno o residui di tubazione del circuito frigo lanciati ad alta velocità.

Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

7. Risk of high pressure fluid ejection from pipelines and/or pressure tanks in hydraulic circuit due to accidental bursting.

Contact of body parts with fluids or residual parts of hydraulic circuit pipelines launched at high speed.

Disconnect the machine from the electrical mains during interventions on the hydraulic circuit.Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

8. Risk of high pressure fluid ejection from pipelines and/or pressure tanks in hydraulic circuit due to design pressure values being exceeded.

Contact of body parts with fluids or residual parts of circuit pipelines launched at high speed.

Depressurise the machine during interventions on the hydraulic circuit.Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

9. Electrical hazards due to direct contact with live parts.

Risk of electrocution and burns. Strictly observe all manual instructions.Chapter 2 “Safety” and 5.5 “Electrical Connections”

10. Electrical hazards due to indirect contact with parts that are live due to faults, in particular due to an insulation fault.

Risk of electrocution and burns. Strictly observe all manual instructions. Chapter 2 “Safety” and 5.5 “Electrical Connections”

11. Electrical hazards: electrostatic phenomena.

Uncontrolled movements by victim of electrostatic discharge due to contact

Strictly observe all manual instructions. 5.5 “Electrical Connections”

12. Electrical hazard: heat radiations or other phenomena, such as projection of melted particles, and chemical effects deriving from short circuits, overloads.

Risk of electrocution with live parts due to short circuits, scalding on contact with hot components due to overload.

Strictly observe all manual instructions. Chapter 2 “Safety” and 5.5 “Electrical Connections”


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13. Heat-associated risk: burns and/or scalding

Scalding on contact with pipelines at temperatures over 65°C and/or freezing due to contact with surfaces at temperatures below 0°C.

Strictly observe all manual instructions. Chapter 2 “Safety”

14. Hazards generated by noise levels that may impair hearing capacity (deafness) and other physical disorders (such as loss of balance, consciousness).

Loss of hearing capacity by operator. Secure all components correctly after interventions and maintenance.

15. Hazards generated by materials or substances handled, used, produced or offloaded from the machine and by materials used to construct the machine: inhalation of refrigerant gases.

Inhalation of refrigerant gas. Strictly observe all manual instructions. Chapter 2 “Safety”

16. Hazards generated by materials or substances handled, used, produced or offloaded from the machine and materials used to construct the machine: fire or explosion.

Risk of fire or explosion. Install the system in an environment fitted with adequate fire fighting equipment. Strictly observe all manual instructions.Chapter 5 “Installation”

17. Hazards generated by failure to use personal protective equipment.

Lacerations to upper limbs during maintenance or installation.

Use adequate personal protective equipment and observe all instructions in the manual.Chapter 1 “General information”; Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

18. Hazards generated by failure to observe principles of ergonomics during machine design, caused, for example, by: inadequate design, layout or identification of manual controls.

Hazards associated with failure to correctly identify manual controls.

Consult all sections of the manual.

19. Hazards generated by failure to observe principles of ergonomics during machine design, caused, for example, by: inadequate design, or layout/location of visual display units.

Hazards associated with failure to correctly understand visual display units.


20. Inadvertent start-up, overtravel/unexpected excess speed (or any other similar malfunction) caused by: fault or malfunction of control system.

Electrical or mechanical hazard due to incorrect settings of operating parameters or settings.

Strictly observe all manual instructions.Chapter 2 “Safety”; Chapter 9 “Operation and maintenance”; 5.5 “Electrical Connections” and Chapter 5 “Installation”

21. Inadvertent start-up, overtravel/unexpected excess speed (or any other similar malfunction) caused by: fault or malfunction of control system with possibility of disabling safety devices.

Electrical hazard during interventions on machine with safety devices inhibited.

Strictly observe all manual instructions. Chapter 2 “Safety”; 5.5 “Electrical Connections”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

22. Inadvertent start-up, overtravel/unexpected excess speed (or any other similar malfunction) caused by: fault or malfunction of control system.

Electrical hazards associated with environmental work conditions.

Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 3 “Technical data” and 5.5 “Electrical Connections”

23. Inadvertent start-up, overtravel/unexpected excess speed (or any other similar malfunction) caused by: return of electric power supply after failure.

Hazards associated with inadvertent start-up of the machine when electric power supply is restored.

Strictly observe all manual instructions. Chapter 2 “Safety”; 5.5 “Electrical Connections” and Chapter 6 “Start up”

Description of risk: Effect: User instructions:


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24. Inadvertent start-up, overtravel/unexpected excess speed (or any other similar malfunction) caused by external factors on the electrical equipment (EMC).

Electrical hazards associated with electric stress on internal machine components, short circuits and overloads.

Strictly observe all manual instructions.Chapter 2 “Safety”; 5.5 “Electrical Connections” and Chapter 9 “Operation and maintenance”

25. Hazards caused by assembly errors. Hazards associated with machine instability caused by vibrations. Hazards on contact with operating fluids, risk of pollution due to dispersion of fluids into the environment.

Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 6 “Start up”

26. Risk of falling or projection of objects or fluids.

Contact of body parts with metallic materials such as the fan blades or moving parts of the compressor.

Disconnect the machine from the electrical mains during interventions on the hydraulic circuit.Strictly observe all manual instructions.Chapter 2 “Safety”; Chapter 5 “Installation” and Chapter 9 “Operation and maintenance”

27. Loss of stability/upturning of machine.

Crushing of body parts. Strictly observe all manual instructions.Chapter 5 “Installation” and instructions on packaging.

28. Loss of stability/upturning of machine due to installation on unstable ground and/or vibrations generated on connection pipelines.

Crushing of body parts due to upturning of the machine, contact of body parts with water due to failure of connections to the hydraulic circuit caused by excessive vibrations.

Strictly observe all manual instructions.Chapter 5 “Installation” and Chapter 6 “Start up”

29. Hazards generated by absence of and/or position of measures/instruments influencing safety: all guards.

Hazard of contact, due to sudden ejections, with machine components and processed or used materials.

Strictly observe all manual instructions.Chapter 2 “Safety”; Chapter 5 “Installation”; Chapter 6 “Start up” and Chapter 9 “Operation and maintenance”

30. Hazards generated by absence of and/or position of measures/instruments influencing safety: graphic safety signs.

Hazard associated with the lack of or inadequate graphic instruction and warning symbols related to dangers that could not be eliminated in design.

The operator must observe all graphic safety signs on the machine and replace when worn or illegible.Strictly observe all manual instructions.Chapter 1 “General information”

31. Hazards generated by absence of and/or position of measures/instruments influencing safety: manual.

Hazards associated with incorrect preparation of the manual due to lack of and/or unclear information required to ensure operator safety and safe use of the machine.


32. Hazards generated by absence of and/or position of measures/instruments influencing safety: disconnection of power sources.

Contact with live parts, contact with high pressure fluids or gas.

Strictly observe all manual instructions. Chapter 2 “Safety” and 5.5 “Electrical Connections”

33. Hazards generated by absence of and/or position of measures/instruments influencing safety: instruments and accessories for adjustments and/or maintenance in safety conditions.

Hazard of cutting, ejection of fluids or gas at high pressure, scalding, or vibrations caused by incorrect maintenance.

Strictly observe all manual instructions. Chapter 2 “Safety”; Chapter 5 “Installation”; Chapter 9 “Operation and maintenance”

Description of risk: Effect: User instructions:

Appendix

The data in this manual are not binding and may be changed by the manufacturer without notice. Reproduction of this manual, even partial, is strictly prohibited.

APPENDIXGENERAL CONDITIONS CHECKLIST

Start

No

Yes

Yes

Yes

Yes

No

No

Has the unit suffered transport or installation damage?

Have the minimum installation clearances specified in this manual been observed?

If evaporating unit: Are the condensing coils free of obstructions?

General condition of unit is in compliance?

Do not start the unit before repairs

Correct installation of the unit, working in compliance with the prescriptions given in the manual

Clean condensing coils

Review the checklists.No

Proceed with the following lists.

Appendix


FIRST START CHECKLIST

Start

No

Yes

No

Yes

No

Persons not involved in the operations must be kept clear of the area

Any alarms shown on unit display?

Water differential pressure switch working correctly?

Trip test:Adjust the plant water gate valves to reduce the flow rate to the evaporator

Stop the unit and find the cause of the problem

Check and/or renew the component

Stop unit and find the cause of the leak in compliance with EN 378-2

Yes

Trip test:Adjust the plant water gate valves to reduce the flow rate to the condenser

High pressure switch working correctly? Check and/or renew the component

Check and/or renew the component

Stop the unit and find the cause of the problem

Low pressure switch working correctly?

Start procedure terminated

Setting high pressure value to approx. 8 bar gas leaks > 3 grams/year are detected?

Working pressure values reading correct?

Yes

Yes

Yes

No

No

No

Appendix


HYDRAULIC CIRCUIT CHECK LIST

No

No

No

No

No

No

No

Si

Si

Si

Si

Si

Si

Si

Hydraulic circuit connections made in compliance with best technical practice?

Water inlet and outlet connections follow correct direction?

Unit is full of water and all air pockets have been removed?

Water flow rate to evaporator is as prescribed in the manual?

Any flow switches installed enabled and correctly connected?

Water filter upline from evaporator installed correctly?

Water filter upline from condenser installed correctly?

Water connections have been made correctly

Adapt the connections

Correct connections

Fill hydraulic circuit and/or bleed the air if present

Adjust water flow rate

Connect correctly or renew the component

Repair or renew the filter

Repair or renew the filter

Pump direction of rotation correct? Restore correct direction of rotation

Start

No

No

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Appendix


CONTROLLER CHECK

Start

No

Yes

Yes

Yes

Yes

Yes

No

No

No

No

Power supply voltage complies with specification given in wiring diagram?

Power feeding conductors are fit for purpose (wiring diagram)?

Protective earth connection complies with statutory legislation?

Protection upline from unit is adequate?

For 3 phase units, correct phase sequence?

Unit electrical connection is properly executed

Connect the unit to the correct power supply voltage

Replace conductors with conductors of an appropriate type

Remake the connection in compliance with statutory legislation

Replace component with an adequate protection device

Correct the sequence of phases

Appendix


OIL CHECKLIST

Start

No

Yes

Sufficient oil level in compressor?

If required, has crankcase heater been switched on at least 6 hours before start-up?

The compressor is ready to start

Check the oil sight glass, if present.Top up as necessary

Activate crankcase preheating and wait 6 hours (see Chapter 4.2.2)

No

Yes

Appendix


UNIT RUNNING CHECKLIST

Start

No

Remove all unauthorised persons from the test area

Power on the unit.

Check the display light up

Contactors and devices functioning correctly?

Check the unit is in stand-by, icon unlit

Start the unit by means of or button

The START-UP procedure has now been completed

Check the component and renew if necessary

Yes

Power on the machine

Documents

New OC HOC ME-OC - Asamiasami.lt/wp-content/uploads/OCEANs.pdf · 2017. 5. 11. · OPERATING AND MAINTENANCE MANUAL Quick guide OCT/ME-OCT 018÷600 1 ENGLISH EN The data in this manual