Air Acondicioning Schulz

230/1/50 400/3/50WALL-AIR

A/C UNITS

Index 36Edition 2.04

PRECISION A/C UNITS

AIR CONDITIONING

OPERATING INSTRUCTIONS

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Contents PageIntroduction 4Technical Data 6Electrical Data 10Dimensions 141. Unpacking and Inspection 152. Unit Identificaton 163. Operating Principle 174. Precautions 215. Safety Considerations 216. Precautions when handling the Unit 217. Vibrations 228. Mechanical Parts 229. Cooling Components 2210. Motors 2311. Control, Monitoring and Safety Components 2412. Installation 4213. Electrical Connections 4814. Start-up 5015. First Checks after starting the Unit 5016. Switching off 5017. Maintenance 5018. Inactivity 5419. Options 5520. Residual Hazards and Emergency Information 7621. Disassembling the Unit 7922. Faults, probable Causes, possible Remedies 80

The manufacturer reserves the right to make alterations without notice.

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Introduction

Modifications in comparison to edition 3.02

• Technical/electrical data have been changed.• The liquid receiver has been cancelled.• The chapter "Installation" has been set behind the chapter "Control".• Sequencing description in chapter 11 has been added.• The digital input assignment has slightly been changed.• The description of the setpoint adjustment has been changed.• The user setup parameters are listed.• A description of the sensor calibration has been added.• The chapter 13 "Electrical connection" has been extended by some notes.• In chapter 17 mean operating times for the component exchange are listed.• The description of nearly all options has been extended by text. All available options are now

described. Beyond this, some options have been changed substantially:- SCF the layout for unit type 2 as well as the assignment of the Minifit-plugs C2, C3 havechanged.- SIGC3 the cable layout has changed.The following options have been added:- DOWNxxW Downflow-Version , KPDC1010 - Keypad, SERC1010 - serial adapter RS485for gateway connection, SPLITTER - LAN-Y-plug for sequencing, LOWTEMPxxT - lowoutside temperatures, HGBPxx - hot gas bypass.

The following information is supplied in accordance with Standards:CE73/23,CE93/68,CE89/392:

MANUFACTURER'S NAME AND ADDRESSSTULZ GmbHHolsteiner Chaussee 28322480 Hamburg

DATA REGARDING THIS MODEL YEAR OF MANUFACTUREAir conditioner for telecom application As shown on the technical plate on the unit

HOW TO CONSULT THIS MANUALThis document contains general informations valid for all models of the series. Further informationslike wiring diagrams etc. will be delivered with each unit.

THIS MANUAL IS INTENDED FOROWNER OF THE APPLIANCEPERSON RESPONSIBLE FOR ITS INSTALLATIONPERSON RESPONSIBLE FOR MANAGING THE PRODUCTPERSON RESPONSIBLE FOR ORDINARY MAINTENANCEPERSON RESPONSIBLE FOR ITS DISASSEMBLY

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PURPOSE OF THE INFORMATION CONTAINED IN THIS MANUAL:CORRECT HANDLING performed by unskilled personnelCORRECT INSTALLATION performed by skilled personnel;CORRECT START-UP performed by personnel trained by STULZ;CORRECT MANAGEMENT performed by skilled personnel;CORRECT MAINTENANCE performed by skilled personnel;CORRECT ORDER FOR SPARE PARTS, made by skilled personnel;CORRECT DISPOSAL OF THE PRODUCT, made by skilled personnel.

RESTRICTIONS TO THE USE OF THIS MANUALThey apply to any operations that must be performed by highly skilled personnel.

WHERE AND HOW TO STORE THIS MANUALInside the electric shelter or together with any other literature concerning the equipment whichutilizes the product, provided it is a dry and clean place.In the event of the manual being misplaced or damaged, the customer may require, for a fee, a newmanual, by quoting the model and serial number shown on the technical name- plate, by contactingyour local STULZ partner.

CURRENT TECHNOLOGYThis manual reflects the state of the art existing at the time the product is marketed and shall not bedeemed to be inadequate for the sole reason that it has not been updated as a result of any newexperience.

UPDATESSTULZ reserves the right to update the product and relevant manual without being required toupdate previous products and manuals other than in exceptional circumstances. To require orreceive any updates of the instructions manual or amendments thereto, which shall be deemed tobe an integral part of the manual, please contact your local STULZ partner.

FOR FURTHER INFORMATIONPlease contact your local STULZ partner.Any suggestions or recommendations made by installers or users of the product for the purpose ofimproving the product or the contents of this manual, will be greatly appreciated by the Manufacturer.

IN THE EVENT OF SALE OF THE PRODUCTPlease advise STULZ GmbH of the address of the new owner so as to enable the dispatch of anyupdates to the manual, otherwise STULZ GmbH shall be relieved of any subsequent liabilities.

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Technical Data Wall-Air CVS 40 - CVS 60 (50 Hz)

Cooling capacity *Sensible cooling capacity*Refrigerant

Condenser fanNumber / TypeAir flowExternal static pressure

Evaporator fan (Type 1)***VoltageNumber / TypeAir flowExternal static pressure

Evaporator fan (Type 2)***Number / TypeAir flowExternal static pressure

EER index (type 2)*Outside operating limit temp. min/maxInside operating limit temp. min/maxExternal noise level **Internal noise level ***Duty cycleWeightHeight / Width / Depth

* Outside temp. 35°C; Inside shelter temp. 25°C RH 40%** measured at 2m distance from unit front side (condenser side). Free field, unit operating in cooling mode at nominal conditions.

Referred to unit type 1.*** measured at 2m distance from unit rear side (evaporator side). Free field, unit operating in cooling mode at nominal conditions.

Referred to unit type 1.**** Type 1: with free cooling & emergency ventilation; DC fans;

Type 2: cooling only; with AC fans

kWkW

m³/hPa

V DC

m³/hPa

m³/hPa

W/W°C°CdB(A)dB(A)%kgmm

CVS 40

3.83.8

R407c

1 / Ø315 axial190010

24 / 481 / Ø310 radial

1000115

1 / Ø310 radial1000135

1.92-20/+45+20/+40

5463100139

1500/880/490

CVS 50

5.25.2

R407c

1 / Ø315 axial2000

5

24 / 481 / Ø310 radial

1000115

1 / Ø310 radial1000135

2.64-20/+45+20/+40

5463100143

1500/880/490

CVS 60

6.45.7

R407c

1 / Ø420 axial2500

5

24 / 481 / Ø310 radial

150010

1 / Ø310 radial150045

2.44-20/+45+20/+40

5563100146

1500/880/490

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Technical Data Wall-Air CVS 80 - CVS 90 (50 Hz)










kWkW

m³/hPa

V DC

m³/hPa

m³/hPa

W/W°C°CdB(A)db(A)%kgmm

CVS 80

8.47.4

R407c

1 / Ø450 axial3400

5

24 / 482 / Ø280 radial

210010

2 / Ø310 radial210060

2.74-20/+45+20/+40

5869100175

1725/960/565

CVS 90

9.38.6

R407c

1 / Ø450 axial3500

5

24 / 482 / Ø310 radial

250025

2 / Ø310 radial250015

2.52-20/+45+20/+40

5866100185

1725/960/565

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Technical Data Wall-Air CVS A2 - CVS A7 (50 Hz)










kWkW

m³/hPa

V DC

m³/hPa

m³/hPa


CVS A2

11.911.9

R407c

1 / Ø500 axial4900

5

24 / 483 / Ø280 radial

285025

2 / Ø355 radial285085

2.85-20/+45+20/+40

6271100230

1910/1170/600

CVS A4

14.014.0

R407c

1 / Ø500 axial7000

5

24 / 483 / Ø280 radial

285015

2 / Ø355 radial285075

2.55-20/+45+20/+40

6971100237

1910/1170/600

CVS A7

16.814.7

R407c

1 / Ø500 axial7000

5

24 / 483 / Ø280 radial

31505

2 / Ø355 radial315050

2.64-20/+45+20/+40

6971100240

1910/1170/600

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Technical Data Wall-Air CVS B1 (50 Hz)










kWkW

m³/hPa

V DC

m³/hPa

m³/hPa


CVS B1

20.819.5

R407c

1 / Ø560 axial6500

5

483 / Ø310 radial

570050

3 / Ø355 radial570090

2.39-20/+45+20/+40

6870100380

2000/1457/735

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CVS 60CVS 40 CVS 50

Electrical Data Wall-Air CVS 40 - CVS 60 (50 Hz)

Power Supply CodeNominal voltageTolerance on voltagePhaseFrequencyTolerance on frequencyPower consumption (type 2)*Operating current (OA) (type 2)*Locked rotor current (LRA)*Control voltage

CompressorPower consumption*Operating current (OA)*Max. current (FLA)Locked rotor current (LRA)

Condenser FanPower consumption*Operating current (OA)*

Evaporator Fan (Type 1)**DC voltageTolerance on DC voltagePower consumption*Operating current (OA)*Locked rotor current (LRA)

Evaporator Fan (Type 2)**Power consumption*Operating current (OA)*Locked rotor current (LRA)

* Outside temp. 35°C; Inside shelter temp. 25°C RH 40%** Type 1: with free cooling & emergency ventilation; DC fans;


00230A150

±2%2.09.044.224

1.737.811.943

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

42400B

3+N50

±2%2.04.823.224

1.733.65.422

00230A1

50±2%2.09.248.224

1.728

11.447

42400B

3+N50

±2%2.04.225.224

1.723

4.224

00230A150

±2%2.612.162.424

2.3110.714.861

42400B

3+N50

±2%2.65.533.424

2.314.15.132

A : 220V - 240V ± 10%B : 380V - 420V ± 10%

0.110.58

24 / 4822-28 / 43-56

0.1 / 0.14.62 / 2.42

11 / 5.5

0.140.631.5

0.110.57

24 / 4822-28 / 43-56

0.1 / 0.14.62 / 2.42

11 / 5.5

0.140.631.5

0.170.76

24 / 4822-28 / 43-560.09 / 0.094.42 / 2.32

11 / 5.5

0.140.631.5

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Electrical Data Wall-Air CVS 80 - CVS 90 (50 Hz)








CVS 80 CVS 90

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

42400

380-420V±10%3+N50

±2%3.16.942.224

2.64.76.240

42400

380-420V±10%3+N50

±2%3.77.948.224

3.225.7746

00230

220-240V±10%150

±2%3.114.378.224

2.612.117.376

00230

220-240V±10%150

±2%3.717.2102.2

24

3.2215

23.1100

0.190.9

24 / 4822-28 / 43-56

0.2 / 0.29.68 / 4.842 x 11 / 5.5

0.281.26

2 x 1.5

0.190.9

24 / 4822-28 / 43-560.19 / 0.24

8.96 / 62 x 11 / 5.5

0.281.26

2 x 1.5

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Electrical Data Wall-Air CVS A2 - CVS A7 (50 Hz)








CVS A2

-42400

380-420V±10%3+N50

±2%4.29.453.024

3.516.41050

0.271.17

24 / 4822-28 / 43-56

0.3 / 0.313.8 / 6.9

3 x 11 / 5.5

0.41.82

2 x 1.1

CVS A4

-42400

380-420V±10%3+N50

±2%5.513.370.524

4.368.312.465.5

0.723.2

24 / 4822-28 / 43-56

0.3 / 0.313.8 / 6.9

3 x 11 / 5.5

0.41.82

2 x 1.1

CVS A7

-42400

380-420V±10%3+N50

±2%6.414.379.024

5.259.313.574

0.723.2

24 / 4822-28 / 43-56

0.3 / 0.313.8 / 6.9

3 x 11 / 5.5

0.41.84

2 x 1.1

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

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Electrical Data Wall-Air CVS B1 (50 Hz)








CVS B1

-42400

380-420V±10%3+N50

±2%8.718.5104.5

24

6.9313

15.199

0.911.6

4843-560.449.29

3 x 8.7

0.863.93

3 x 2.2

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

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A

C

B

CVS40-50-60CVS80-90CVSA2-A4-A7CVSB1

DimensionsRear view Side view

Front view

A88096011701457

B1500172519102000

C490565600735

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1. Unpacking and InspectionSTULZ products are shipped ex-works. All units have been individually inspected in alltheir parts and carefully packaged.Immediately inspect the unit upon receipt, making sure it has been shipped in its properposition. Note improper shipment on the shipping document.We recommend you accepting merchandise subject to inspection.

Check for damage and, if any, note this immediately on the shipping document. Removepacking and check that the exterior casing is not scratched, marked or have signs of blowsand that no components are missing and that there are no traces of oil. Before throwing thepackaging away check that it does not contain documents or parts of the machine.Any damage that is encountered must be notified to the carrier by registered letter within 8days of receipt. The carrier is responsible for any damage caused during shipment. STULZis not responsible for damage caused to the merchandise by the shipper but will do all inits power to assist customers in these situations.N.B. This product may not be returned without prior written approval by STULZ.For any assistance please contact your local STULZ partner.

NOTE: If installation of the product is not required immediately or the product needsto be onforwarded to its final destination, replace it in its packing, after inspecting it,and store it in a safe place.

UP

UP

UP

WARNING! As an environmental concern, we recommend that thepacking cartons be recycled and separated from any plastic.

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This unit can be correctly identified by thetechnical name-plate containing all theinformation for its correct use.In addition to the manufacturer's identificationdata and the product trade-marks, the name-plate contains the following information:

Constructor TrademarkModelSeriesDate

Nominal voltageControl voltage

PhaseFrequency

Start/Run current

Cooling capacity

Power absorbed

Circuit breaker, curve type C/ Safety fuse type aM

Inside temperature

Outside temperature

Refrigerant charge

Type of refrigerant

Maximum pressure

Shelter side protection IP

Ambient side protection IP

WeightDuty cycle

The technical name-plate is embossed on aplastic support which ensures high enduranceof the text even in par ticularly difficultenvironments.

N.B. For any assistance or informationconcerning the unit described in this manual,knowledge of its serial number is essential.

2. Unit Identification

This identifies the product family.Product identification number.Date on which the product is placedon the market and date ofcommencement of warranty.Voltage to be supplied to the unitWorking voltage of the auxiliarycircuits if different from the voltagerating.Voltage phaseVoltage frequency.

Current absorbed when starting the compressor. /Current absorption with 25°C (RH40%) inside sheltertemperature and 35°C ambient temperature conditions

Unit cooling capacity with 25°C (RH40%) inside sheltertemperature and 35°C ambient temperature conditions.

Power absorbed by the unit with 25°C (RH40%) insideshelter temperature and 35°C ambient temperatureconditions.

Rating of the automatic switch/safety fuse to be installedby the installer.

Minimum and maximum shelter temperature where themachine works and for which the machine wasdesigned.

Minimum and maximum ambient temperature wherethe machine works and for which the machine wasdesigned

Quantity of refrigerant contained in the unit'srefrigeration circuit

Brand name of the refrigerant used in the unit's coolingcircuit

Maximum pressure at which the refrigeration circuitfunctions

protection level in the direction of the shelter

protection level in the direction of the ambientEmpty weight of the machineOperational capacity of the unit

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Condenser

Condenser fan

Evaporator fan

Antifreezethermostat

Regulatingthermostat

Evaporator

HP switch

Compressor

Expansion valve

3. Operating PrincipleWall-Air STULZ conditioners are designed to cool rooms containing technological systems.They are designed for external installation. Their use allows to eliminate problems causedby high temperatures, dirt and humidity which are present in the environment.The unit, which is basically made up of a sealed cooling circuit where the refrigerantcirculates, is divided into two sections, where the air in the environment and the air in theshelter are treated without coming into contact with each other during cooling mode.

The system operates as follows:The compressor compresses the refrigerant gas bringing it to a high pressure andtemperature.The hot gas, by going through the condenser, is cooled and liquefied thus releasing heatto the air in the environment. Pushed through the thermal expansion valve, the liquidrefrigerant loses pressure, which makes it prone to evaporation. This takes place in theevaporator, where the refrigerant absorbs the heat of the warm air from the shelter, which istherefore cooled.

LP switch

Filter dryerCondenserpressure switch

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ADDITIONAL OPERATING MODES

Standard versions type 1 (with C1010 controller)Free-cooling mode. On units type 1, there is a damper equipped with servomotor which directsinternal and external air flows. This damper is proportionally controlled by a modulating signalcoming from C1010 controller (for free-cooling logic see Chapter 11: Control, Monitoring and SafetyComponents). Its position can be adjusted from 0 to 100% of fresh air, to regulate free-coolingcapacity. When the free-cooling damper opens, external air is taken from the external environmentand blown directly to the internal ambient. Exhaust internal air is discharged outdoor, without anyneed of overpressure dampers.

Mixed mode. When the temperature of the external air is low enough to enable the free-coolingmode, but the effect of this operating mode is not sufficient to keep the internal temperature withinthe admitted range, the compressor is switched ON while the free-cooling damper is still open. Inthis way, the evaporator cools external air instead of internal re-circulating air, combining benefit offree-cooling with cooling mode.

Emergency ventilation. When there is a power failure, units work in emergency ventilationmode, fed by a back-up battery. During main power supply shortages, the system, includingevaporator fans, control components and free-cooling damper motor, is energized by emergencypower supply. In this way, continuous circulation of air inside the shelter is always assured. Thiscirculation of air is combined with free-cooling mode, when the necessary conditions to enable thisoperation mode are respected. Versions with 48VDC (standard) and 24 VDC (optional) emergencypower supplies are available. When the power supply is present, the DC components are suppliedby the back-up battery with standard configuration. When the TRAREC option is ordered, the DCpower supply is obtained transforming main power supplied to the unit.

Dehumidification. Units equipped with C1010 include also as standard a mechanical hygrostat.When humidity inside the shelter is higher than the set value, this hygrostat enables thedehumidification mode on C1010 controller (for a description of this hygrostat and logic ofdehumidification see Chapter 11: Control, Monitoring and Safety Components).The dehumidification can also be controlled by the optional humidity sensor RHC (see Chapter 19:Options).

Both versions type 1 and type 2 + heating elements optionHeating. With heating elements option (see RSC option on Chapter 19: Options), units include anelectric coil in the evaporator section. When the temperature is low, the heating coil turns on(compressor off) and the free-cooling damper is in complete re-circulation position, in order to heatinternal air. This mode is controlled by C1010 microprocessor, when present (see Chapter 11:Control, Monitoring and Safety Components for heating logic). When units are mechanicallycontrolled, an additional TMC thermostat will be supplied for the heater control (see Chapter 19:Options).

E/0204/36/19

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Filter

Electric panel

Damper

Heatingelement

Evaporator

Compressor

Evaporator fan

Type 1 units: Air flows inside the unitcooling and free-cooling modes

Condenserfan

Condenser

Free-coolingCooling

E/0204/36/20

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Electric panel

Heating element

Evaporator

Compressor

Evaporator fan

Condenser fan

Condenser

Type 2 units: Air flows inside the unitonly cooling mode

E/0204/36/21

4. PrecautionsThe CVS series cooling units are designed to operate as a wall-type unit and in an upright position.For all models the compressor is and must always be in an upright position.The cooling units maynot be used or transported in a position other than that for which they have been designed.

WARNING!Never run the machine if you have discovered leakage of the coolant fluid.

If traces of oil are present on the unit, which point to a loss of coolant, on the inside or the outside,then the equipment must be thoroughly checked before starting the unit and, if necessary, STULZ'stechnical department should be contacted.

Machine connections and the main electric components are located inside the unit in a specialboard (front part of the air conditioner).

5. Safety ConsiderationsThe installation and handling of cooling units may be hazardous as they form a pressurised systemwith electric components.Only skilled personnel may repair, inspect or maintain the cooling units.Unskilled staff may only replace the filter, if present. All other operations must be performed bypersonnel who are experienced and qualified in the maintenance of cooling systems.Before servicing this unit, refer to the instructions contained in this manual, check the data on thedata plate and follow any other precaution to ensure optimum safety.

WARNING!Never work on the unit without disconnecting all power supplies before.

6. Precautions when handling the UnitHandle these units, when they are packaged, using a fork lift. When they are not packaged use ahoisting machine equipped with cables or chains suited for supporting their weight.

E/0204/36/22

7. VibrationsThe cooling unit does not produce any significant vibrations as the parts which generatethem are installed on anti-vibration devices.

8. Mechanical Parts8.1 STRUCTUREThese machines are composed using self-supporting panels. These are made of passivatedand baked enamel sheet metal to guarantee good corrosion resistance. They make themachine easy to inspect and, at the same time, offer adequate protection to its internalcomponents. The external panels are internally lined out with sound-absorbing material ofa thickness of 10 mm, which consists of polyurethane foam based on open cell polyester,fire-tested according to FMVSS motor vehicle safety std 302.Internal components of the structure are only accessible by removing cladding panels.These are removed by extracting their fastening screws using suitable tools.

8.2 AIR FILTER (EU3 class)It is designed to prevent large dirt particles present in the environment from obstructingairflow through the evaporator.

8.3 DAMPER (only free-cooling)This mobile damper powered by a servomotor directs the inside and outside air flow.Damper: made of galvanized steel mounted on self-lubricating bushes.

8.4 FIXING BRACKETSConsisting of steel zinc plate sheet with a powder coating as a protection against corrosion(suitable only in non-corrosive and non-salty environments). To fix the unit to the wall, usethese brackets, following instructions in chapter 12.

9. Cooling ComponentsThese are connected together by copper piping, appropriately welded to ensure a greaterseal.

9.1 REFRIGERANTThe refrigerant that is used can be: R407c (HFC).OPTIONAL: R134a, R22.

9.2 COMPRESSORTwo types of compressor are used: - alternative hermetic (CVS40 only)

- scroll.Compressors are basically composed of an electric motor and a mechanical section whichis powered by this motor for pumping the refrigerant gas.

E/0204/36/23

In reciprocating compressors the pumping unit consists of a piston which slides inside acylinder and which generates, depending on its phase, compression and aspiration.In scroll compressors the pumping unit consists of two spirals positioned one inside theother. One spiral is fixed while the other performs orbital motion which aspirates andcompresses the gas.

9.3 CONDENSERThis part allows the release of the heat of the coolant gas in the environment. It consists ofan exchange pack with copper piping and aluminium fins (suitable only for non-corrosiveand non-salty environments)

9.4 FILTER DRYERThis is a mixed mechanical/chemical filter and serves the purpose of filtering the coolantwhich goes through it, at the same time eliminating humidity particles.

9.5 THERMOSTATIC VALVEThis adapts coolant evaporation pressure, inside the evaporator exchanger, to the realthermal load. This component is factory set during testing and must not be tampered with.

9.6 EVAPORATORThis is the part where the transfer of the heat, contained in the air in the shelter, to thecoolant gas takes place. It consists of copper pipes and aluminium fins. (suitable only fornon-corrosive and non-salty environments)

10. Motors10.1 COMPRESSORElectric motor positioned inside the compressor.It is mounted on vibration dampers to reduce vibrations.

10.2 FANSThese may be of different types depending on the model. They are either:- multiblade axial, with outside rotor on bearings, dynamically balanced;- radial, with plastic or metal rotor, on bearings;These fans are manufactured in accordance with Standard EN 60 335 1. They are treatedwith anticorrosion plastic materials, with class B insulation and class 1 protection.The motor protection is IP44, in accordance with Standard DIN40500 whereas the safetyrate complies with Standards DIN30110.Noise levels are consistent with Standard DIN 45635.

10.3 DAMPER ACTUATORElectric servomotor with built-in travel stop switch and overload protection.Protection degree: IP54 Protection class: III

E/0204/36/24

11. Control, Monitoring and Safety ComponentsAll equipment is set and inspected at the factory and generally does not require furtheradjustments or interventions.If, for specific reasons, it becomes necessary to perform modifications on the settings ofautomatic device this task must only be performed, subsequent to notification to the STULZengineering service, by specialized product expert.STULZ air conditioner are equipped with a set of devices designed to ensure properoperation. Intervention by any one of these automatic safety device is a sign of a malfunctionand it is absolutely necessary to eliminate the cause of the malfunction.

WARNING!It is prohibited to make electrical by-passes on safety equipment.This intervention, in addition to being dangerous, also immediately invalidatesguarantee coverage for the product.

Interrupt electrical power to the unit before performing any repair or maintenance.

Work on the unit must only be done by expert, qualified and authorized personnel.

11.1 HIGH PRESSURE SAFETY SWITCHstops compressor operation when the pressure inside the refrigeration circuit exceeds thefollowing value. OFF 28 + 1 bar ON 22 + 1,5 bar

11.2 LOW PRESSURE SAFETY SWITCHstops compressor operation when the pressure inside the refrigeration circuit drops belowthe following value. OFF 2,0 + 0,5 bar ON 3,2 + 0,3 bar

11.3 CONTACTORScontrol the motors by operating with auxiliary voltage.They refer to IEC947-4-1 standards.

11.4 AUTOMATIC CIRCUIT BREAKERSprotect against short circuits and excessive motor current. They have adjustable thermaland magnetic triggering devices.

11.5 AUTOTRANSFORMERThis device is necessary, when the power supply voltage differs from the standard voltage.The autotransformer adapts the supplied voltage to the standard voltage.It is manufactured in compliance with EN60742 and CEI14-6 standards. When the spaceis sufficient, it is installed in the unit.

E/0204/36/25

STANDARD COMPONENTS with MECHANICAL THERMOSTAT CONTROL

11.6 REGULATING THERMOSTAT (TRA)The mechanical thermostat is suited for wall installation (with extension steam/humiditysensor). It should be installed in the room to be conditioned with a sufficient distance to thesupply air outlet so as to measure an average temperature. It measures and controls thetemperature providing the start signal for the compressor. The adjustment range is +5°C to+30°C, the switching contacts 10A - 250VAC.

11.7 ANTIFREEZE THERMOSTATSimilar to the adjustment thermostat, it is calibrated in such a way as to prevent the possibleformation of ice on the evaporator.

11.8 COMPRESSOR START DELAYING DEVICE (RT)It is included in standard configuration of mechanically controlled units and prevents thecompressor from starting immediately after a stop, helping this way to increase the lifecycle of the compressor.

11.9 CONDENSATION CONTROL PRESSURE SWITCHcontrols the fan's ON/OFF contact to keep condensation temperature constant.OFF 12,5 + 1,5 bar ON 16,5 + 1 bar

E/0204/36/26

STANDARD COMPONENTS with ELECTRONIC CONTROL

11.10 Electronic control C1010This microprocessor-based electronic board is equipped with a set of terminals which are necessaryto connect the board to the controlled devices (e.g. valves, compressors, fans). The program hasbeen written in the eprom whilst the set parameters are permanently stored (even in case of powerfailure). The Main Board can be (optionally) linked to a supervisory/telemaintenance system viaserial line. The C1010 controller is housed in the A/C unit itself and can control only 1 A/C unit. Thecontroller can be connected to a local network for the facility of data transfer (e.g. for sequencing)

Sequencing - How to connect and configure

1) Two unitsa) Connection

Connect the socket „Sequencing LAN“ of unit 1 with the socket „Sequencing LAN“ ofunit 2 using the sequencing cable. You find this socket on the electrical connection panel.

b) Jumper settingThe jumpers TU2 and TD2 of both C1010-boards have to be closed. Jumper TL2 must beopen.

E/0204/36/27

c) Configuration• Use the keypad installed on unit 1.• On the main page of the C1010 press „SET“ to choose unit 1 using arrow up/down

keys, press „SET“ again.• Press „Menu“ to choose the menue.• Press 1x Arrow-Up key to go to „Manufacturer Menue“, press „SET“• Type in the password with Arrow-up/-down keys, press „SET“ to confirm.• Use arrow-up/-down keys to go to the following menue-point for configuration.• Go to M05, press „SET“, change value to „1“ or “2” with arrow-up/-down keys, press

„SET“ to confirm (M05 enables sequencing function on running unit time for “1”, onrunning fan time for “2”)

• Configure M01=1 for unit 1 (M01 is the unit adress for sequencing).• Configure M02=2 (M02 is the number of units in sequencing).• Configure M03=2 (M03 is the number of units which can be ON parallel)• Press 2x „ESC“ to leave menue.• Press „SET“ to choose unit 2 with arrow up/down keys, press „SET“ again.• Configure M01= 2 for this second unit .• Configure M05,02,03 according to the above description.

2) Three to five unitsa) Connection

Connect the socket „Sequencing LAN“ of unit 1 with the SPLITTER, which has to be usedon all units between first and last unit. Connect the socket „Sequencing LAN“ of the lastunit with the SPLITTER on the second last unit. Connect the SPLITTER of the unit betweenfirst and last unit directly from SPLITTER to SPLITTER. You find the sockets on the electricalconnection panel.

E/0204/36/28

b) Jumper settingThe jumpers TU2 and TD2 of the first and the last units C1010-boards have to be closed.The jumpers TU2 and TD2 of the unit between first and last units C1010-boards have tobe OPEN.Jumper TL2 of all C1010-boards must be open.

First and last unit:

Units between first and last:

c) Configuration• Proceed according to description for two units.• Configure M05=1 or 2 for all units• Configure M01= 1 for first unit, 2 for 2nd unit, 3 for 3rd unit, 4 for 4th unit, 5 for 5th

unit.• Configure M02=3 or 4 or 5, if you have 3 or 4 or 5 units in sequencing.• Configure M03= 2, 3 or 4 if you have 3, 4 or 5 units in sequencing. Then there is

always ONE unit in standby, which will operate only, if one of the other units stops inalarm.

3) Rotation timeTo change the rotation time from default 24 hours, please change M04 accordingly equal onall units.

E/0204/36/29

Terminals

X12 pin 1,2

X12 pin 3,4

X12 pin 5,6

X12 pin 7,8

X13 pin 1,2

X13 pin 3,4

X13 pin 5,6

X13 pin 7,8

X14 pin 1,2

X14 pin 3,4

X15 pin 1,2

X15 pin 3,4

X16 pin 1,2

X16 pin 3,4

Description

Fire-smoke presence /*

Humidity switch /*

Door open / Intrusion

External enable (ON-OFF) /*

Overload protection compressor /*

Overload protection condenser fan /*

Overload protection evaporator fan /*

Thermal protection heating /*

Voltage failure

High pressure input /*

Dirty filter alarm (or blocked condenser) /*

Air flow /*

Low pressure input /*

not used

Analogous Inputs

Input Assignment

Digital Inputs (supplied by the board, therefore all inputs should be connected to potential free contacts)

logic ID

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

Terminal

minifit

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 2x2

2 of 2x2

2 of 2x2

2 of 2x2

2 of 2x2

2 of 2x2

Silk

screen

DI 1

DI 2

DI 3

DI 4

DI 5

Terminals

X4 pin 1,5

X4 pin 2,6

X4 pin 3,7

X4 pin 4,8

X5 pin 1,5

X5 pin 2,6

X5 pin 3,7

X5 pin 4,8

Description of default

applicationInternal Relative Humidity IRH

Condenser Pressure PC

Evaporator Temperature TE

Internal Temperature TI

Condenser Temperature TC

External Air Temperature TAE

Not connectedExternal Relative Humidity ERH/Evaporator pressure

logic ID

IC1

IC2

T1

T2

T3

T4

IC3

Terminal

minifit2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

2 of 4x2

Silk

screenANIN 1

ANIN 2

*selectable via software

Type

4-20mAPin 1 27Vdc sc protectedPin 5 signal4-20mAPin 2 27Vdc sc protectedPin 6 signal

PTC KTY 81-1 (-20...90°C)

PTC KTY 81-1 (-20...90°C)/

Pt 100

PTC KTY 81-1 (-20...90°C)

PTC KTY 81-1 (-20...90°C)

4-20mAPin 4 27Vdc sc protectedPin 8 signal

E/0204/36/30

Terminals

X9 pin 1

X9 pin 2

X9 pin 3

X9 pin 4

X10 pin 1

X10 pin 2

X10 pin 3X10 pin 4

X11 pin 1,2X11 pin 3,4X11 pin 5,6X11 pin 7,8X11 pin 9,10X11 pin 11,12X11 pin 13,14X11 pin 15,16X11 pin 17,18X11 pin 19,20X11 pin 21,22X11 pin 23,24

Description

Compressor contactor(to contactor coil A1)Compressor contactor(to auxiliary line)Compressor(to auxiliary common)Compressor(to contactor coil A2)Heating resistorTerminal 1(to line via relay)Line

NeutralHeating resistorTerminal 2 (to neutral)Evaporator fan /*Condenser fan/ Humidification/*Common Warning /*Low pressure /*High pressure /*Air flow /*Dirty filter /*High temperature alarm /*Low temperature alarm /*High humidity alarm /*Common alarm /*not used

Output Assignment

Digital Outputs

LogicIDR1

R2

R3R4R5R6R7R8R9R10R11R12R13

Terminalminifit1 of 2x2

1 of 2x2

1 of 2x2

1 of 2x2

1 of 2x2

1 of 2x2

1 of 2x21 of 2x2

2 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x22 of 12x2

SilkscreenCOMP

HEATER

DIGITALOUT

*Default setting. Other assignments are selectable via software.

Rate

3A / 48VdcNO3A / 48VdcC3A / 48Vdc

3A / 48Vdc

8A / 230VacNO8A / 230VacC8A / 230Vac8A / 230Vac

5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V5A / 48V

Terminalnumber

2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO2 C NO

Terminals

X6 pin 1

X6 pin 2

X6 pin 3

X6 pin 4X7 pin 1X7 pin 2X7 pin 3

X7 pin 4

Description

Free cooling damper(V+ DC supply)Free cooling damper(V- DC supply)Free cooling damper(0-10 V analogous out signal)not used(V+ DC supply, 4VA)(V- DC supply, 4VA)Humidification / T proportional signal(software selectable)(0-10 V analogous out signal)not used

SilkscreenANOUT1

ANOUT2

Rate

4W

0-10 V

4W4W0-10 V

Terminalnumber

1

1

1

1111

1

Analogous Outputs

E/0204/36/31

TerminalsX8 pin 1X8 pin 2X8 pin 3X8 pin 4

DescriptionLFan LNFan N

Silk screenAC FAN

Rate4A4A4A4A

Terminal number1 of 2x21 of 2x21 of 2x21 of 2x2

Fan Management (Input / Output)

Condenser Fan Speed Control - Internal Phase Cut


DescriptionPositive, current output +not connectedNegative, current input -not connected

Silk screenAC FAN

Rate4A-4A-

Terminal number1 of 2x21 of 2x21 of 2x21 of 2x2

Condenser Fan Speed Control - External Phase Cut

Logic ID1 V+1 V-1 OUT1 IN

DescriptionEvaporator fan 1 - V+ supply; 5A flowEvaporator fan 1 - V- supply; 5A flowEvaporator fan 1 - PWM signal (450 Hz)Evaporator fan 1 - Tachometric signal (maxfrequency 160 Hz)


Terminal number1111

Evaporator Fans

Note: to use the external phase cut device, be sure to have connected X8 Pin1 to L(Line) and X8 Pin3 to N(Neutral).

one 2x2 minifit connector




Terminal number1111





Terminal number1111


E/0204/36/32

Operating Diagrams - C1010

no free cooling conditions

Conditioner 1 operates with setting at 25°C, between 27.5°C and 25°C.Heating elements operate with setting at 15°C, between 12.5°C and 15°C.

Conditioner 2 (optional) operates with setting at 25°C, between 29.5°C and 27°C.Heating elements 2 (optional) operate with setting at 12.5°C, between 10°C and 12.5°C.

* only with LAN connection of both units

Unit 2*

heating element compressor

compressorheating element

Unit 1

SET2 SET1

SET2 SET1

27,5°C

2,5°C

12,5°C

2,5°C

15°C 25°C

29,5°C27°C

2,5°C

4,5°C

10°C

2,5°C

12,5°C 25°C

E/0204/36/33

compressor


Free Cooling Conditions

Unit 1

heating element

Conditioner 1 operates with setting at 25°C, between 32°C and 29.5°C.Heating elements operate with setting at 15°C, between 12.5°C and 15°C.

compressorheating element

Conditioner 2 (optional) operates with setting at 25°C, between 34°C and 31.5°C.Heating elements 2 (optional) operate with setting at 12.5°C, between 10°C and 12.5°C.


Unit 2*

SET2 SET1

SET2 SET1

32°C29,5°C

2,5°C

7°C

12,5°C

2,5°C

15°C 25°C

34°C31,5°C

2,5°C

9°C

10°C

2,5°C

12,5°C 25°C

E/0204/36/34

100%

100%

With setting at 25°C, free cooling of unit 1 operates in the proportional range between 25°C and28.75°C.

Unit 1

free cooling

SET


Free cooling unit 2 operates with setting at 25°C, between 27°C and 30.75°C.

Unit 2*

free cooling

SET


3,75°C

25°C 28,75°C

2°C

25°C 27°C 30,75°C

5,75°C

E/0204/36/35

Dehumidification control

The dehumidification control is differently carried out corresponding to the unit equipment (with/without el. reheat). The following diagrams are valid only with the optional humidity sensor.The dehumidification is controlled via the room humidity and the room temperature.

Dehumidification

Dehum.Set point(40%)

Dehumidification Start(10%)

Room humidity

DehumidifcationStop (1%)

Dehumidification without el. reheat

Here the dehumidification is obtained by reducing the fan speed and simultaneous compressoroperation. Reducing the air flow with constant heat rejection brings air down to the dew point.Therefore, humidity in the air condenses and deposits on the evaporator surface. When the surfacetemperature of the evaporator goes below a factory-set value, the fan speed increases again.Dehumidification is disabled below a certain value of internal temperature. When the internaltemperature increases again after a certain hysteresis, the dehumidification is enabled again, if thedehumidification request is still present.

Dehumidification

Startvalue(20°C)

Stopvalue(15°C)

Set pointcooling(25°C)

Room temp.

E/0204/36/36

Dehumidification with el. reheat

As above described, the dehumidification is obtained by reducing the fan speed andsimultaneous compressor operation.An electric reheat is additionally operated, if the temperature difference to the cooling setpoint exceeds a certain value below the set point.

Stop valueDehumidification(15°C)

Start valueReheat(22.5°C)

Dehumidification

Coolingset point(25°C)

Room temp.

Stop valueReheat

Start valueDehumidification

E/0204/36/37

ADJUSTING SET-POINT/ALARM SET POINT PROCEDURE

Proceed as follows:

Before entering menus the display appears as shownon the left. Press “MENU” key to enter the menus.

The display appears as shown on the left. Using (UP) and (DOWN) keys you can move through thevarious menus of C1010. When you arrive at USERSETUP (blinking at the last line of the display), press“SET” key.

Now you are inside the USER SETUP menu. Using (UP) and (DOWN) keys you can move through thevarious parameters modifiable inside the USER SET-UP menu. The procedure to modify all theseparameters is the same. As an example, in the followingyou can find the procedure to modify the temperatureset-point during cooling. Go with the arrow keys toTEMPERATURE SETPOINT COOLING.

• Press “SET” key.The last line (current value) will start to blink.• Using (UP) and (DOWN) keys you can change the value of this parameter.• Press “SET” key to store the new selected value.

The same procedure can be followed to modify allparameters inside USER SETUP menu. Here below,you can find the list of all parameters modifiable insidethis menu.

E/0204/36/38

S01.

S02.

S03.

S04.

S05.

S06.

S07.

S08.

S09.

S10.

S11.

S12.

S13.

°C/F

°C/F

°C

-

°C/F

°C/F

-

°C/F

°C/F

°C/F

°C/F

°C/F

°C/F

25°C

15°C

15°C

40%

5°C

5°C

50%

45°F5°C

5°C

40°C

5°C

45°C

5°C

0/30°C

-999/999°C

0/30°C

-999/999°C

0/30°C

Cooling setpoint

Heating setpoint

Second heaterSet point

Humiditysetpoint

CoolingBand

HeatingBand

HumidityBand

Alarm limitLow temperature

Hysteresys oflow temp. alarm

Alarm limitHigh temperature

Hysteresys ofhigh temp. alarm

Alarm limitMax temperature

Hysteresys ofmax temp. alarm

Set point for the temperaturecontrol managed by thecompressor

Set point for the temperaturecontrol managed by the heatingresistor

Setpoint of temperatureassociated to the control ofsecond heater

Humidity % for calculation ofstart/stop of dehum. process

Selectable temperature band forcooling

Selectable temperature band forheating

Selectable humidity band forheating

Set point for the lowtemperature alarm

Hysteresis of low temperaturealarm

Set point for the hightemperature alarm

Hysteresis of high temperaturealarm

Set point for the maxhumidity alarm

Hysteresis of max temperaturealarm

IdCode Mask Description Range PresSet Unitvariable

variable

-999/999°C

variable

0/20°C

0/20°C

0/100%

-999/999°C

E/0204/36/39

S14.

S15.

S16.

S17.

S18.

S19.

S20.

S21.

S22.

S23.

%

%

Sec.

Sec.

-

H

Min.

20%

80%

20 sec.

30 sec.

SW_1:UKSW_2:DE0H

0Min.

1

1

2000

0/100%

0/100%

0/9999

0/255

UK/DE/ITA/FR/ES/PORPL

0/23H

0/59Min.

1/31

1/12

0000/9999

Alarm limitLow humidity

Alarm limitHigh humidity

Alarm delay(humid.-temper.)

Intrusion-vibrationalarm delay

Language selection

Setting clockHour

Setting clockMinute

Setting clockDay

Setting clockMonth

Setting clockYear

Set point for the low humidityalarm

Set point for the high humidityalarm

Alarm delay time (temperature,humidity)

Delay time of intrusion-vibrationalarm

Selection of language

Hours of clock

Minutes of clock

Day of the month

Month of the year

Year

IdCode Mask Description Range PresSet Unit

E/0204/36/40

SENSOR ADJUSTMENT - How to configure

To adjust the sensors for temperature and humidity (if installed) sensors proceed as follows:

• Start the unit evaporator fans only (when more units are present in the same location on asequencing LAN, is better to start with the master unit).

• To do it press “MENU” and 6x the arrow-down. The System Maintenance headline appears.• Press “SET” to enter the menu. The “MANUAL CONTROL” headline appears.• Press “SET” to enter the menu.• Press 6x the arrow-down, press “SET” and select the evaporator fan speed (100%).• Press set again to save and quit the menu speed• Press 1x the arrow-down and press “SET” to select, with the arrow-keys, the time under

manual control.• Read on the display the value of temperature or humidity that you want to calibrate (Example:

Internal temperature reading on the display = 25°C)• Measure with a reference instrument the real value (Example: Internal temperature

measured near the internal temperature sensor = 23°C)• Calculate the offset as = ‘real’ - ‘C1010 reading’ (Example: 23°C - 25°C = -2°C)• Use the keypad installed on unit 1.• On the main page of the C1010 press „SET“ to choose unit 1 using arrow up/down keys,

press „SET“ again.• Press „Menu“ to choose the menu.• Press 2x Arrow-Up key to go to „I/O Menu“, press „SET“• Type in the password with Arrow-up/-down keys, press „SET“ to confirm.• Use arrow-up/-down keys to go to the following menu-point for configuration.• Go to I02, press „SET“, default value is blinking, change value to the calculated offset with

arrow-up/-down keys (Example: -2°C), press „SET“ to confirm.• Proceed in the same way for other sensor adjustments on this unit.• I04= Offset for external temperature sensor (if installed)• I05= Offset for internal humidity sensor (if installed)• I07= Offset for external humidity sensor (if installed)• To adjust sensors of second (third, fourth or fifth) unit, use the keypad connected to the

corresponding unit or:• to adjust sensors of second (third, fourth or fifth) unit, use the keypad connected to the first

unit and:• on the main page of the C1010 press „SET“ to choose unit 2 ( or3,4,5) using arrow up/down

keys, press „SET“ again. Then you configure the parameters of the selected unit via thekeypad connected on the first unit. Note: after finishing all adjustments, set the keypad backto unit 1.

NOTE: The best results are obtained setting the offsets on the units in the same conditions.With only internal fans running to have and air recirculation and to avoid local static DT. After theMaster offsets correction, refer to the master units values to set the others units.

E/0204/36/41

��

��

��

P

1

23

11.12 DIRTY FILTER ALARM DEVICE RFS(standard only in units controlled by C1010, optional for mechanically controlled units)It provides a signal, via the display ; which indicates the need to service the air filter

Technical features:

Power supply: 1,5 (o,4) A; 250 Vac - 0,1 A; 24 VacHumidity: 0...50% rel. h., non condensingOperating temperature: -20/+85°CMax. pressure: 50 mbarContacts: Micro switch with contacts of AgCdO (on/off)Housing: PlasticProtection: IP54Protection class: IDiaphragm: SiliconePressure connection: Ø 6 tube

Range : 0,4 - 2,0 mbarDifferential press. : 0,2 mbar + 15%P1 : Connection of the high pressureP2 : Connection of the low pressure

Adjustment:Using a screwdriver, you can adjust the desired differen-tial pressure, over which the filter control triggers, at thecentral screw.

Wiring :

Contact 3-1 opens, when the differential pressure increases to theadjusted value. Simultaneously contact 3-2 closes, the signal istransmitted by this contact.

11.11 MECHANICAL HYGROSTAT (only in units controlled by C1010)It is included in the standard configuration of units controlled by the C1010 microprocessor andmeasures the air humidity at the internal intake. If the humidity exceeds an adjustable limit value,the hygrostat sends a signal to the C1010 controller for high humidity alarm and enablingdehumidification. The limit value is adjustable from 0% to 90% rel. humidity.

E/0204/36/42

12. Installation

1 Unpack the unit taking care not to damage its exposed parts. Before discarding it,check the packaging for any parts or documents. Check that the supply voltage is asdesignated.

2 Check that:- there is enough room for an easy application and installation, both inside andoutside the shelter;- the wall of the shelter can support the weight of the units;- the shelter is clean on the inside;- the shelter is not in the proximity of heat sources or warm air flows;- the structure is watertight;- the inside of the shelter allows a proper air circulation, preventing any recirculation.It is important to prevent hot air expelled by the condenser fan from being even partiallysucked back in. This would cause continuous stoppages, commanded by the pressureswitches, reducing efficiency and increasing electricity consumption. Improper operationof this type can quickly cause irreparable harm to the compressor.

WARNING!Do not obstruct circulation by air being sucked into or expelled from the airconditioner.

3 the cooling unit must be installed as high as possible;4 if installed on a door, make sure the hinges can withstand the weight of the unit;5 make sure the electric cable is not torn or damaged when the door is closed;6 if the depth of the cooling unit prevents the door from opening completely, arrange a

stopper for such a door.

E/0204/36/43

7 Prior to servicing the shelter, disconnect power supply to the same.Prior to drilling holes or making cuts on the shelter, make sure that holes, screws, cables,etc. do not interfere with the equipment which has already been installed. Make cuts onthe shelter panels according to the corresponding cut-out drawing.

8 Glue the adhesive gasket around the edges of the cut-out openings in the shelter; theadhesive gasket consists of ethylene propylene, open-cell type, 3 mm thick and 10 mmwide.

9 Set the conditioner on its support bar (provided by the customer). Run the cables throughthe holes (middle cut-out) and fasten it in place with screws. Then, fix the lateral bracketswith screws to the corresponding holes (which have to be provided with threaded inserts)on the shelter wall.

10 When the installation is completed, put the return and supply grilles (option) in place.

E/0204/36/44

Cut-outs for CVS 40 0M2yy - CVS 60 0M2yy

E/0204/36/45

Cut-outs for CVS 80 0M2yy - CVS 90 0M2yy

925

8434

2.5

342.

527

1

250

4050

030

0

37.5

1725

180 600 180

400280 280

17.517.5

180 600 180

90Ø

9

960

3535

342.

534

2.5

372.

5

E/0204/36/46

Cut-outs for CVS A2 0M242 - CVS A7 0M242

E/0204/36/47

Failure to comply with these requirements, in addition to affecting proper unitoperation, invalidates warranty coverage.

Cut-outs for CVS B1 0M242

E/0204/36/48

13. Electrical Connections

WARNING!It is absolutely necessary, before making any connections, to use a suitable tester tocheck the supply voltage. This must be the same as the voltage indicated on the technicaldata plate.

The user must furnish and install, upstream from the unit, an isolating switch with pre-fuse and capacity as specified on the technical plate in order to be able to performmaintenance on the unit in the absence of electricity.

The ON/OFF-key on the C1010 keypad (if present) is only used for the unit stand-by. Itmust therfore not be considered as a safety element to perform maintenance on theunit. Maintenance must be done after disconnecting the power supply of the unit (seenote above).

• Check the supply voltage and frequency;• Check that supply voltage and frequency are compatible with those for the unit.• Interrupt both main power and auxiliary power before working on the system;• Select connection cables (not supplied) according to EN60204-1 Standards• Check that power cables are installed with a sufficient distance from alarm cables, from the

network connection cable and from the master-slave connection cable.• On the main power supply lines, in preference install an omni-pole automatic switch, curve type

C, eventually complete of another differential switch. Alternatively, besides the isolating omni-pole switch, install a safety fuse, retarded, aM type;

• On the DC power supply lines, in preference install an omni-pole automatic switch, curve typeC, eventually complete of another differential switch. Alternatively, besides the isolating omni-pole switch, install a safety fuse, retarded, aM type;

• Verify carefully the polarities of DC power supply, as shown on the terminal board;• Verify that positive pole (+) of DC power supply is not earthed.• To make electrical connection of power supply, use cables with section suitable to the power

absorbed by the users. These cables must be compliant with current standards.• For 3-phase Scroll compressors: Take care of correct phase sequence after the connection of

the main power supply. The sequence is important for the correct sense of rotation and operationof the 3-phase Scroll compressor. The correct compressor operation can be easily checked bysensing the temperature at the condenser outlet. If this temperature is noticeably higher than theexternal temperature, the compressors works correctly. Otherwise, the compressor rotates inthe wrong sense and the phase sequence must be changed.

ATTENTION!The inobservance of these points can provoke damages or malfunction of components andwarranty shall become forthwith void.

E/0204/36/49

1211

109

87

65

43

21

109

87

65

43

21

87

65

43

21

87

65

43

21

C1

C2

C3

Configuration for cable connectionsJust at the opening in the middle of the cut-out, the following socket configurations can be foundon the back panel of the units:

wit

h u

nit

s ty

pe

2 (m

ech

anic

ally

co

ntr

olle

d)

Mai

n po

wer

sup

ply

Pin

Des

crip

tion

1/5

Com

mon

ala

rm2/

6no

t us

ed3/

7no

t us

ed4/

8no

t us

ed

Pin

Des

crip

tion

C1

1/5

Air

flow

ala

rm2/

6H

igh

pres

sure

ala

rm3/

7Lo

w p

ress

ure

alar

m4/

8C

omm

on w

arni

ng

Pin

Des

crip

tion

C2

1/7

Com

mon

ala

rm2/

8H

igh

hum

idity

ala

rm3/

9Lo

w t

empe

ratu

re a

larm

4/10

Hig

h te

mpe

ratu

re a

larm

5/11

Dirt

y fil

ter

alar

m6/

12N

ot u

sed

Pin

Des

crip

tion

C3

1/2

Ext

erna

l en

able

3/4

Doo

r op

en/In

trus

ion

alar

m6/

7In

tern

al h

umid

ity s

enso

r8/

9F

ire-

smok

e pr

esen

ce5/

11E

xter

nal

hum

idity

sen

sor

Mai

n po

wer

sup

ply

E

mer

genc

y po

wer

sup

ply

wit

h u

nit

s ty

pe

1 (C

1010

co

ntr

olle

r)

Mas

ter/

Sla

veC

onne

ctor

Rem

ote

Pan

elC

onne

ctor

E/0204/36/50

14. Start-up

THERMOSTAT CONTROLTurn the optional main switch Q5 (if existant) to position 1 to start the A/C unit.Turn all switches on.If the temperature in the room is lower than the temperature set on the thermostat the evaporatorfan will start and will function without interruption.If the temperature in the room is higher than the temperature set on the thermostat then thecompressor and the external fan (condenser) will start. They will operate until the temperature inthe room falls below the value set on the thermostat.

Note!A 3 minute delay has been set between compressor stoppage and subsequent start-up in order toprevent repeated stoppages and start-ups at short intervals.

ELECTRONIC CONTROLTurn the optional main switch Q5 (if existant) to position 1 to start the A/C unit.• Follow the procedure specified in the section for the C1010 controller.• After having completed the start-up, please fill in the start-up form which is supplied witheach unit and send a copy to he addres on the form.NOTE: the start-up may only be carried out by personnel trained by Stulz.

15. First Checks after Starting the UnitCheck that no alarms have occurred.Check that the air being released from the condenser into the environment flows correctly withoutbeing drawn into the cooling unit.Check that the evaporator fan functions properly.Check, with the unit running, that the supply voltage remains within the values indicated on thetechnical data plate

16. Switching offTo switch off the unit, disconnect the main voltage and secondary voltage from the system .

17. MaintenanceVery little ordinary maintenance is necessary, in view of the reliability and total automation of movingparts. This maintenance, however, must be performed according to prescribed maintenance intervals.Failure to perform maintenance, in addition to affecting the unit durability and operation, invalidatesthe warranty.

WARNING!Switch off the power supply of the unit before performing any maintenance measures.

E/0204/36/51

AB

C

D

Accessibility

Remove the 3 front panels to access the components inside the conditioner.

Remove this panel to access the electricboard and the damper motor.

Remove this panel to access the air filter.

Remove this panel to access the compressorand the pressure switches.

Leave a service area around the installed unit to permit correct operation and maintenance.

A = min. 600 mmB = min. 200 mmC = min. 600 mmD = min. 600 mm

E/0204/36/52

Fig. 1 Fig. 2

��

��

Air filter replacement

Proceed as follows:Remove the panel A (fig.1).Remove the air filter B in two steps: arrow 1, arrow 2 (fig.2).

E/0204/36/53

17.1 PREVENTIVE MAINTENANCE SCHEDULETwo monthlyCheck that the unit's condensate drainage system is perfectly clear and operational.YearlyCheck that the fans do not show signs of overheating or abnormal vibrations.Check that the exchangers are efficient and not soiled.

Note: If the air conditioner works in exceptionally dirty environments or if experience showsthat it requires more frequent maintenance then this maintenance must be performed asrequired.

Note: After each scheduled and unscheduled service:check that the condensate drainage system is perfectly efficient.

17.2 EXTRAORDINARY MAINTENANCE INTERVALSEvery 3 years or every 10,000 operating hours the unit must undergo a general overhauleither at the manufacturer's factory or at companies authorized by STULZ or by qualifiedagencies at the customer's own expense.

17.3 REPLACEMENT OF PARTSTo guarantee continuity of service to the units, it is recommended to replace somecomponents according to their MTBF (medium time before failure).You can find the MTBF of the most critical components in the following table:

COMPRESSOR: 30,000 operating hoursCONDENSER FAN: 35,000 operating hoursEVAPORATOR FAN: 40,000 operating hoursMECHANICAL THERMOSTAT: 100,000 cyclesCOMPRESSOR RELAY: 200,000 cycles

NOTE: the MTBFs in the table above are referred to the time during which the componentsare operating. The ratio between this time and the total time of service depends on the typeof application, except for the evaporator fan (operating time is 100% of total service time).

Example:If you esteem that the compressor will be operating 60% of the total time, the MTBF will be30,000 working hours / 0.6 = 50,000 hours.

E/0204/36/54

Cleaning the condenser

To clean the condenser rinse withcompressed air in the direction opposite to thenormal air flow direction through the heatexchanger. For a better access to thecondenser coil, remove the panel of thecondenser fan and rinse compressed aircloser to the coil.The inner parts of the cooling unit, either onthe room or shelter side, must be cleaned witha liquid detergent and compressed air havinga pressure not higher than 4 bar, with the unitproperly earthed.

18. InactivityIf the unit remains inactive for longer periods of time, it is necessary to drain any condensateresidue and carry out a general cleaning procedure.

17.4 HOW TO CLEAN THE UNITDo not use acid or caustic substances to clean any part of the air conditioner.Air filters, must be removed from the unit and cleaned. Should you decide to replace thefilter, the spare filter must have the same thickness and density specifications as the origi-nal.A set of spare filters may be requested from STULZ's service department.

E/0204/36/55

19. Options

19.1 ELECTRICAL REHEAT - RSCThis option is useful when heating of the internal air is required. The electrical reheat is made ofaluminium and includes a safety device. It is controlled directly by C1010 microprocessor, whenpresent (see Chapter 11: Control, Monitoring and Safety Components for heating logic). Whenunits are mechanically controlled, the required additional TMC thermostat, is included in the RSCoption.

19.2 EVAPORATOR INLET & OUTLET AIR GRILLES - GRxxWIt is a set of two grilles, useful to direct evaporator air flow of Wall-Air units. Both grilles are made ofaluminium. Grille at air intake has a single row of horizontal fixed fins. Grille at air discharge has asingle row of horizontal adjustable fins.

19.3 PROTECTIVE TREATMENT ON COILS - TREATEpoxy treatment on condenser and evaporator coil surfaces to protect them against corrosion.This treatment reduces condenser coil efficiency. Not suitable to very corrosive ambients (saltdeposits, etc.).

19.4 ANTI-VANDALISM SOUND ABSORPTION COVER - CVPSAxxThese special covers offer an additional protection from tampering by vandals on Wall-Air units.They protect the condenser fan zone (condenser air discharge) against sharp objects that mightbe inserted by vandals to damage the unit. Filled with acoustic insulating material, noise emissionsfrom the unit will be reduced by approximately 2 dB(A). They are made of non-painted steel sheet.Acoustic insulation material is in fire class MVSS STD302. With these covers, depth of the unitsincreases by: 230mm for CVS40/50/60; 250mm for CVS80/90; 300mm for CVSA2/A4/A7/B1.This option is not available for Wall-Air downflow.

19.5 R134a REFRIGERANTWith standard R407c the upper limit of external temperature is +45°C. With R134a, units can workup at higher external temperatures (60-65°C), although also the operating temperature limit of thecondenser fans has to be verified. Since with R134a, compressors have a lower efficiency thanwith R407c, with this option a bigger compressor is installed to achieve roughly the same totalcooling capacity as with standard R407c refrigerant.NOTE: with R134a refrigerant, single phase power supply is available only for CVS40/50/60.

19.6 KIT OF PLUGS FOR SITE POWER SUPPLY CABLES - SKITThis is the kit of plugs to be installed on site power supply cables. It includes the plug(s) to matchthe corresponding socket connection fields SCF for an easy power supply connection.

19.7 CRANKCASE HEATER FOR COMPRESSOR – CRAThis heating resistance, installed around compressor carter, operates when compressor is OFF,to keep lubricating oil warm. This function assures constant lubricating performance of oil at thecompressor start. It is necessary only when outdoor temperature might go below –20°C.

E/0204/36/56

1170

A

B

CVS40-90CVSA2-A7

117017

25

CVS 40-90

CVS A2-A7

19.8 CASING ADAPTATION - RtR

Rear view Side view

This option is available for all Wall-Air units except model CVS B1. With the RtR option, all the unitshave the same cut-outs, to allow a complete interchangeability, without modifying the existing cut-outs.CVS40/50/60/80/90 units with RtR option have the same general dimensions as the standard unitsCVS80/90. CVSA2/A4/A7 do not change their dimensions from standard units.

Front view

A565600

B17251910

E/0204/36/57

CVS 40-90

CVS A2/A4/A7

The Wall-Air units CVS 40 - 90 are fixed by fixing angles so as to use the same fixingholes as for the larger units CVS A2/A4/A7.

E/0204/36/58

CVS 40-90

CVS A2/A4/A7

The drawing below explains how two different unit sizes fit to the same cut-outs and fixingholes. The red dotted line shows the position of the units CVS 40-90, the smaller width ofwhich is equalized by fixing angles. The black dotted line shows the position of the unitsCVS A2/A4/A7. The width of the cut-outs is sized for the units CVS A2/A4/A7 and is thereforelarger than necessary for the CVS 40-90. Nevertheless the functionality is not affected asthe cut-outs are partly covered by the unit casing so as to prevent leaks of air flow.

E/0204/36/59

Here you can see the position of the installed units in relation to the cut-outs with all thenecessary dimensions. Again the red dotted line marks the CVS 40-90 units, whereas fora better visibility the blue dotted line relates to the position of the CVS A2/A4/A7. The cut-outs are in yellow.

E/0204/36/60

19.9 SOCKET CONNECTION FIELD - SCFThis option consists of connectors to allow a fast power supply connection. These connectorsreplace the holes for passing electrical cables on the plate placed on the back of the unit betweenthe two louvers for evaporator air intake and discharge (for standard configuration of this plate, seechapter 13: Electrical Connections). Suitable plugs to be installed on electrical cables to matchSCF sockets, are provided with SKIT option.

19.10 MAIN SWITCH - SWT/SWMThis is located on the electrical panel and is used to disconnect main power supply to the unit.When switched off, it interrupts power supply to the unit circuits from it downstream. According tothe indications on chapter 13, a main switch must always be installed upstream from the unit, inorder to cut-off power supply to the unit before performing any operation during installation ormaintenance. This switch can be provided by the installer as well, or it can be requested orderingthis option. SWT is the version for 3-phase main power supply, SWM the version for single-phasemain power supply.

E/0204/36/61

1211

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E/0204/36/62

19.11 DOWNFLOW CONFIGURATION - DOWNxxWThe Downflow option for Wall-air units has been studied to allow a more natural circulation of airinside the shelter.Evaporator air is blown into the shelter downwards, and sucked from an opening on the top of theunit, both in cooling and in free-cooling modes. In this way, a circuit with warm air rising from theequipments is created.Wall-Air downflow units are designed to allow all working modes of standard upflow units (some ofthem are available only if the unit is equipped with C1010):• cooling,• free-cooling,• heating,• dehumidification,• assisted free-cooling (compressor ON + free-cooling).

Free-coolingCooling

E/0204/36/63

From a maintenance point of view, all components which might be replaced during life cycle of theunits are accessible by removing the panels:

• at the front of the unit (compressor, HP and LP pressure switches, air filter, free-cooling dampermotor, electrical panel),

• on its top (condenser fan),• at its bottom (evaporator fan).

Air Filter

Electric panel

Damper

EvaporatorCompressor

Evaporator fan

Condenser fan

Condenser

E/0204/36/64

All available models (CVS60, CVS80, CVS90, CVSA2, CVSA4, CVSA7) are realized in thesame casing, with the same dimensions and the same cut-out.

E/0204/36/65

Cut-outs Wall-Air Downflow CVS 60 - CVS A7

About space required for installation and service, please refer to the same drawing on chapter17, valid also for upflow units. Consider also 1m space from the top of the unit for a correctcondenser air discharge.

10 x Ø8

E/0204/36/66

Technical Data Wall-Air Downflow CVS 60 - CVS 90 (50 Hz)










kWkW

m³/hPa

V DC

m³/hPa

m³/hPa


CVS 60

6.36

R407c

1 / Ø420 axial270015

481 / Ø310 radial

18000

1 / Ø400 radial1800100

2.89-20/+45+20/+40

5463100222

2100/990/720

CVS 80

8.27.8

R407c

1 / Ø500 axial420010

481 / Ø400 radial

250020

1 / Ø400 radial250020

2.95-20/+45+20/+40

6159100230

2100/990/720

CVS 90

9.18.7

R407c

1 / Ø500 axial420030

481 / Ø400 radial

2000100

1 / Ø400 radial2000100

2.85-20/+45+20/+40

6159100246

2100/990/720

E/0204/36/67

Technical Data Wall-Air Downflow CVS A2 - CVS A7 (50 Hz)










kWkW

m³/hPa

V DC

m³/hPa

m³/hPa


CVS A2

10.810.3

R407c

1 / Ø500 axial520010

481 / Ø400 radial

25005

1 / Ø400 radial2500

5

3.03-20/+45+20/+40

6159100247

2100/990/720

CVS A4

13.312.7

R407c

1 / Ø500 axial5500

0

482 / Ø310 radial

3500150

2 / Ø310 radial3500

0

3.07-20/+45+20/+40

6168100251

2100/990/720

CVS A7

1615.2

R407c

1 / Ø500 axial750010

482 / Ø310 radial

390015

2 / Ø355 radial390015

2.72-20/+45+20/+40

6868100262

2100/990/720

E/0204/36/68

CVS 60

-42400

380-420V±10%3+N50

±2%2.25.22624

1.733.24.224

0.160.74

4843-560.0952.35.5

0.2891.282.4

CVS 80

-42400

380-420V±10%3+N50

±2%2.86.63524

2.214.075.132

0.281.21

4843-560.2274.61

8

0.2921.32.4

CVS 90

-42400

380-420V±10%3+N50

±2%3.27.54324

2.624.956.240

0.281.21

4843-560.2144.35

8

0.291.292.4

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

Electrical Data Wall-Air Downflow CVS 60 - CVS 90 (50 Hz)








E/0204/36/69

Electrical Data Wall-Air Downflow CVS A2 - CVS A7 (50 Hz)








CVS A2

-42400

380-420V±10%3+N50

±2%3.68.14824

3.015.61

746

0.2651.15

4843-560.2274.61

8

0.2921.32.4

CVS A4

-42400

380-420V±10%3+N50

±2%4.39.35224

3.86.931050

0.261.13

4843-560.54811.46

2 x 8.7

0.2761.25

2 x 0.9

CVS A7

-42400

380-420V±10%3+N50

±2%5.914.07124

4.68.512.465.5

0.73.1

4843-560.3597.51

2 x 8.7

0.5752.35

2 x 2.2

V

phHz

kWAAV AC

kWAAA

kWA

V DCV DCkWAA

kWAA

E/0204/36/70

All options of Wall-Air upflow units are available also for downflow version, except:

• RSC, electrical reheat. Maximum heating capacities according to this table:

MODEL CVS60 CVS80 CVS90 CVSA2 CVSA4 CVSA7HEATING CAPACITY (kW) 1,5 4,5 4,5 4,5 4,5 4,5

• GRxxW: since dimensions of openings are different, a new code (GRWD) has been introduced(valid for all models).

• RtR: casing adaptation. Option not offered for Wall-Air downflow.• CVPSAxx: anti-vandalism sound absorption covers are not offered for Wall-Air downflow.

Condenser opening is on the top of the unit.• EVDCC24: emergency ventilation 24VDC. Not available for Wall-Air downflow.

19.12 GRWD - ALUMINIUM GRILLES FOR WALL-AIR DOWNFLOWIt is a set of two grilles, useful to direct evaporator air flow of Wall-Air units in downflow configuration.Both grilles are made of aluminium. Grille at air intake has a single row of horizontal fixed fins. Grilleat air discharge has a single row of horizontal adjustable fins.

ONLY FOR UNITS TYPE 1 (C1010 control + free-cooling + DC emergency ventilation)

19.13 EMERGENCY VENTILATION 24VDC - EVDCC24With this option, evaporator fans are 24VDC instead of standard 48VDC.

19.14 DC POWER SUPPLY FROM AC UNIT DURING NORMAL OPERATION - TRARECIt is a group of transformer + rectifier bridge installed on the electrical panel of the unit. It is necessarywhen DC emergency power must be transformed from the AC main power supplied to the unit (notduring main power supply shortages).

E/0204/36/71

ONLY FOR UNITS WITH C1010 ELECTRONIC CONTROL

19.15 KEYPAD FOR C1010 - KPDC1010This key-pad is connected to C1010 to display information about operating conditions, status ofthe unit and eventual alarms. For Wall-Air units, the key-pad is in wall-mounted version (not installedinside the unit) and it has to be connected to the plate on the back of the unit (shown on chapter 13:Electrical Connections). When models with T as seventh digit are ordered, each unit is providedwith its own key-pad. When two or more units are connected together in sequencing, only one key-pad can be connected to the master unit. With this configuration, the key-pad can display the datafrom all units which take part in the sequencing, but only of one unit at a time. The unit whose datayou would like to be displayed can be selected via the key-pad itself.

19.16 STULZ TELECOMPTROL MONITORING SOFTWARE - TCOMonitoring software to supervise the main unit functions, remote on-off, setting parameters, andalarm management by modem (requires GAT on unit side).

19.17 GATEWAY FOR MONITORING - GATGateway for monitoring including modem. It has to be connected to one of the unit controllers insequencing via the serial adapter board SERC1010 (see following option). This gateway workswith Stulz TeleCompTrol monitoring software TCO.

19.18 SERIAL ADAPTER RS485 FOR GATEWAY CONNECTION - SERC1010It is an interface board for RS485 serial port. It has to be installed on the PRG connector of C1010board.This interface board is useful when gateway of tele-monitoring system has to be connected toC1010.When 2 or more units are connected in sequencing and have to be connected to the tele-monitoringsystem, each unit has to be provided with SERC1010.

19.19 HUMIDITY SENSOR - RHCThis sensor can be installed both inside or outside the shelter, depending on the required function.Inside the shelter, humidity probe measures internal humidity giving a proportional signal to C1010in order to realize the following functions:-display on the key-pad of internal humidity value;-control of dehumidification function;-control of humidification function.Outside the shelter, humidity probe measures external humidity in order to enable free-coolingfunction according also to the value of this parameter.Range of measurement is RH between 15% and 90%.The probe is supplied loose, to be mounted on site. It is provided with a signal cable and powersupply cable 1.5m long and with the necessary minifit plug to match connector C3 for inputs toC1010 located on the unit. It has to be installed on the shelter wall outside the unit, using the clipincluded in the kit. Then, it has to be connected to connector C3 on the unit via its cable and theconnector provided in the kit (or via the corresponding connector of signal cable SIGC3, if thisoption is ordered).If units are supplied with parameters of C1010 not configured for RHC, the electronic controller hasto be configured by the installer on site, according to the instructions leaflet.

E/0204/36/72

19.20 VOLTAGE CONTROL DEVICE - VCCIt is a relay with double intervention threshold: one for low voltage and one for high voltage. VCCinterrupts power supply if it is not in rated tolerance terms, in order to prevent faults due to voltagevariations not compatible with electric components inside the unit.

19.21 CONTROL OF PHASE CONNECTION FOR UNITS WITH 3-PHASE SCROLLCOMPRESSORS - PSCRRelay for control of right sequencing of phases during connection of main power supply. Only for 3-phase scroll compressors, PSCR protects them from turning in the wrong direction. If not ordered,please refer to the instruction on Chapter 13 for correct connection of this kind of compressors.

19.22 HARDWARE KEY FOR SOFTWARE UP/DOWNLOAD - HKEYIt is useful to update software and/or file with configuration of parameters loaded on the electroniccontroller C1010. Software and/or parameters configuration can be both downloaded from HKEYto C1010 or uploaded from C1010 on HKEY, selecting the corresponding options on key-pad ofC1010. This is useful to transfer software and configuration from an already updated unit to otherunits which haven’t been updated yet. HKEY has to be inserted into SPI socket on C1010 board.

19.23 ADAPTER FOR SOFTWARE UP/DOWNLOAD WITH LAPTOP - ASTThis option can realise the same function as the HKEY option, but using a laptop as memorysupport for the files. It consist in a serial adapter for RS232 port to be inserted into PRG socket onC1010 board.

19.24 SEQUENCING CABLE 2m - SEQC2These cables are used to connect the units to each other in a sequencing net, using the sequencingsocket on the back plate of the unit. If N is the number of units to be put in sequencing, N-1 is thenumber of required cables for sequencing net. This cable is not provided as standard with the units,but only as an option with standard length of 2m and necessary connectors (see drawing on thenext page). If longer cables are needed, please consider that maximum length permitted is 8m.If maximum length is exceeded, a screened cable is necessary and this cable has to be routed inan earthed metallic tube. In this tube there must be no other cables than signal cables.

19.25 SIGNAL CABLE 3m - SIGC3This cable is provided with 3 minifit connectors to match the corresponding C1, C2 and C3 socketson the back plate of the unit. It is used to bring alarm signal out from the unit to an external user andto give some input signals to C1010 (door open, fire/smoke alarm) from external devices providedby the installer. This cable is available as option, with 3m standard length. There are no relevantlimits on maximum length admitted. (see next page)

19.26 LAN DOUBLER FOR SEQUENCING NET (MORE THAN 2 UNITS) - SPLITTERSPLITTER is a LAN doubler, with 1 male connector (unit side) and 2 female connectors (sequencingcables side). Its connectors are compatible with ACTSEQC2 (option).This accessory is useful for connecting more than 2 units in sequencing, when they are equippedwith C1010 electronic board. It has to be connected to the master/slave connector on the unit andto the two sequencing cables coming from the previous and following units of sequencing net.Therefore, the necessary number of doublers is = N-2, where N is the number of units in sequencing.

E/0204/36/73

27 x

0.3

4 m

m²

RJ11 connector4 conductors

SIGNAL CABLE 3m - SIGC3 SEQUENCING CABLE 2m - SEQC2

E/0204/36/74

19.27 LOW EXTERNAL AIR TEMPERATURES (DOWN TO -40°C) - LOWTEMPxxWThis option is necessary for all the applications of Wall-Air units when the unit has to work below -20°C. It ensures operation at outdoor temperatures down to -40°C. Limits of working temperatureinside the shelter remain the standard ones.This option includes the following special features:• heating elements on condenser fan conveyor;• special condenser fan for low temperatures with a special grease on their bearings and

oversized thermic protection;• condensing pressure control devices to improve unit working at lower outside temperatures;• heating system for electric panel;• heating resistance on condensing water discharge;• heating elements on free-cooling damper incl. thermostat and fuse;• protective covers on both lateral and frontal openings of free-cooling air intake.

They imply an increase of width and depth of the units.If temperature is below -0°C for long periods, it is recommended to verify (as frequently as thesituation requires) the correct movement of free-cooling damper and the cleanliness of free-coolingopenings. This is necessary to ensure the correct working of the unit.For outside temperatures below -20°C, also crankcase heater is recommended.

19.28 HOTGAS BY PASS - HGBPxxConsisting of:• 1 hotgas-bypass-valve• 1 solenoid valve• Hotgas-bypass-line from the compressor pressure side to the evaporator input with pressure

actuation line at the compressor suction side• Control of the refrigerant capacity in the range of 50 to 100% of the nominal capacity with

constant compressor operation and constant evaporation temperature• The solenoid valve, which is installed in series with the hotgas-bypass-valve, is closed during

dehumidification to prevent a capacity reduction by the hgbp-valve.• According to the refrigerant pressure at compressor suction, the hotgas-bypass-valve controls

how much refrigerant shall by-pass the condenser and expansion valve and pass directly ashotgas into the evaporator. This process increases the evaporator surface temperature, in thisway reducing cooling capacity. The control characteristic of the hgbp-valve is inverselyproportional.

ATTENTION: with hot gas by-pass system, set of internal temperature can be varied only between23°C and 27°C.

E/0204/36/75

ONLY FOR UNITS WITH MECHANICAL CONTROL (TRA)

19.29 HIGH TEMPERATURE ALARM DEVICE - TMCWith units controlled by C1010 high temperature alarm is already included in microprocessorfunctions. This alarm can be available also in case of mechanically controlled units, adding TMCoption. It consists in a thermostat with bi-metallic sensor element for switching signal transmitters.The adjustment range is from 0°C to 60°C, contacts 6A-250VAC. Type of contacts NC.

19.30 CLOGGED FILTER ALARM DEVICE - RFSWith units controlled by C1010, this differential pressure switch is already included in the standardconfiguration. It is supplied as an option for units controlled by mechanical thermostat. For itsdescription, see chapter 11: Control, Monitoring and Safety components.

19.31 AIRFLOW ALARM DEVICE - FLWhen units have C1010 controller and emergency DC evaporator fans, the airflow alarm is provideddirectly by the controller, which receives a tachometric signal from the fans. When evaporator fansare of the AC type, this signal is not available. In this case, the airflow signal is obtained by adifferential pressure switch like the one used for RFS. When the pressure difference betweenintake and discharge of fans is lower than the rated value, this device gives the signal of airflowalarm. This device is already included in units with AC fans controlled by C1010. Instead, with unitscontrolled by mechanical thermostat TRA, this device is available as an option.

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20. Residual Hazards and Emergency InformationThis unit was designed to reduce danger sources or situations to a minimum.These dangers arise from improper use of the product or from failure to comply with installation andoperating instructions.All personnel who work on or near the unit must be familiar with these instructions.

20.1 GENERAL SAFETY PROVISIONSAll personnel charged with testing and maintaining the unit must be familiar with the following safetyregulations:· Danger signs must be easily visible in areas of potential danger.· A visual supervision service must be set up in danger areas.· Supervisors must keep constant contact with controllers.· Transit zones, doors and ladders placed near the area where the unit is located must never be

blocked.· Emergency exits must never be blocked.· Slippery areas that could be a potential risk for persons must be covered with anti-slip materials.· Proper tools and suitable procedures must be used for every specific activity.· Test tools and equipment must be kept in good order.· Personnel must have in-depth knowledge of methods and procedures to apply in case of fire (set

up a fire extinguisher service in a handy position).· The following actions must be taken if a fire starts:- Switch off the electrical power supply to the component that is burning.- Switch off all fans so as to cut the oxygene supply.- Advise the appropriate department.

20.2 HAZARDS ARISING FROM THE PRODUCT COMING INTO CONTACT WITH THINGSOR PERSONS· Danger point 1a) comes from movement by the fan. The grating mesh has a useful gap, between

wires, smaller than 10 mm. Particles with smaller dimensions could be ejected by the fan blade.· Danger point 1b) comes from accidental contact with the heat exchanger since its aluminium fins

can have sharp edges.20.3 HAZARDS ARISING FROM ELECTRICAL FAULTS

20.3.1 SAFETY STANDARDS FOR ELECTRICAL EQUIPMENTIntroductionThe causes of electrical risks are well known and it is not difficult to prevent these risks by applyingconstant care and attention.Assigned personnel must be informed regarding potential dangers and trained regarding safetyprocedures in order to reduce the number of potential electrical accidents.

20.3.2 TASKS ASSIGNED TO PLANT MANAGERSPlant managers must be informed regarding potential risks in the system and must superintendpersonnel that works with electrical equipment.Superintending tasks consist of localizing possible risk situations and investigating problemsencountered by personnel when performing maintenance.Each defective component must be immediately repaired or replaced.The manager must insist on application of safety measures. He must not tolerate or accept deviations

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from these because this could cause harm to persons or to the machinery.

20.3.3 HIGH VOLTAGEContact with high voltage circuits can cause burns, shock, unconsciousness or even death for thepersons involved.This problem can be caused by poor understanding of the dangers inherent to use of electricaldevice s.Damage to the human body, in this case, depends on the intensity of current, the duration ofcurrent and the path the current takes as it goes through the body.

20.3.4 SAFETY STANDARDS TO COMPLY WITH WHEN THE EQUIPMENT IS SWITCHED OFFInterrupt the power supply to the unit before opening it.Make sure no electricity is present in the unit's circuits.Clean and dry the work area.Remove dowels, rings, brackets or metal parts which can hamper the job to be done or becomepotential conductors for electricity.Ground or short-circuit the terminals of the fan capacitors in the de-energized circuit.Remove fuses only after the circuit has been deactivated.

20.3.5 SAFETY STANDARDS TO COMPLY WITH WHEN PERFORMING MAINTENANCE ONLIVEThe following standards must be complied with, in addition to those stated at point 20.3.4 above:· personnel must never work alone;· work should be done, if possible, using only one hand;· use only authorized procedures to perform by-passes at interlocks;· make sure assigned personnel are perfectly familiar with the machine's components and

maintenance procedures before starting to work;· use protective gloves;· open all contacts that bring power to the equipment before measuring resistance values;· check that there is no high voltage in the low voltage circuits;· do not use magnetic tools near strong magnetic fields.

20.3.6 SAFETY STANDARDS TO COMPLY WITH DURING MAINTENANCEIf continuous operation is not required, the system must be turned off.Before beginning work, the following is required:· check the maintenance person and make sure he is not carrying objects which could become

conductors;· inspect the work site and make sure the floor is clean an dry;· inspect work tools. These must be suited for the job to be done and be in good condition in order

to permit safe maintenance;· measuring instruments must be periodically calibrated;· check work procedures before starting the job. Check the wiring diagram and get an overall

picture of how the system is structured.It is necessary, while maintenance is being done:· for the maintenance person to be aware of which circuits are under high voltage;· no resistance measurements must be made on live circuits;· use only one hand when testing live circuits;· ground the terminals of the instrument before measuring live circuits;

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· always strictly comply with the suggestions mentionned aboveMaintenance can be held to be terminated when all components have been reinstalled and the unithas its original appearance.

20.4 SAFETY STANDARDS TO COMPLY WITH WHEN WORKING ON REFRIGERATIONCIRCUITSThe refrigerant used for this machine can be dangerous if it is not properly used. Several precautionsmust be taken when handling this substance:

· never release, store or use the refrigerant near open flames. The refrigerant is non-toxic. Contactwith flames causes combustion which generates toxic gases that can corrode metal surfaces;

· never expose the eyes to contact with the refrigerant since it can reach temperatures of -40°C;· never expose the skin to contact with the refrigerant. If this happens then the damaged part must

be treated using the same procedures used in combination with frostbite and freezing;· avoid high concentrations of refrigerant since these can cause suffocation. In this case the

person must be evacuated from the room and undergo artificial respiration;· avoid brazing or welding in the presence of refrigerant vapours;· do not place gas heating equipment or electrical radiators in places where refrigerant vapours

may be present;· do not smoke;· do not overheat gas cylinders; do not exceed the refrigerant gas limit indicated on the technical

data plate;· the cooling system must be handled with care as it may contain acids as a result of motor burn-out.

Therefore, protective gloves, goggles and clothing must be worn.· eliminate pressure from the entire cooling system before brazing or welding. Welding when the

circuit is under pressure is extremely dangerous due to the risk of the piping rupturing and moltenmaterial being projected by the refrigerant gas pressure.

20.5 HAZARDS ARISING IN CASE OF FIREThere are no direct dangers.The refrigerant gas, in the presence of flames, generates toxic and corrosive substances.The way to prevent this risk, in view of the relatively small quantities of refrigerant contained in themachine, is to position the unit in adequately ventilated rooms.

20.6 TOXIC SUBSTANCESThe gas contained and used in this product is an ecological type of gas. A very small quantity isused and the circuit is hermetically sealed.All leaks with a loss of more than 15 grams per year are checked and eliminated during testing.The producer of the refrigerant gas states that gas concentrations inferior to 1 to 1000 are nontoxic. When the machine is not installed in a well-ventilated or suitably large room and there is asubstantial leak of refrigerant then the room should be ventilated and personnel should be sent outfrom the room.

20.7 HAZARDOUS FLUIDSThe unit does not contain any fluids which are hazardous to people.During operation, the A/C unit produces condensate which is drained into the environment if it isnot dissipated by the dissipator. It is recommended to drain this fluid adequately by condensatelines so as to prevent possible hazards to people in the area.

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21. Disassembling the Unit

WARNING!This unit contains refrigerant gas and a small quantity of lubricants (esters) in thecompressor. These components are pollutants for the environment and must not bedispersed.

Disassembling operations on this unit must only be done by expertsBefore starting to dismantle the unit check that it has been disconnected both fromelectric mains and from the user's fluid pipeline circuits.

This unit must be disassembled by authorised organisations.STULZ is able and has equipment for disposing of these units and performing almost totalrecuperation of components without harm to the environment.While awaiting disposal the unit must be kept stored protected from weather.

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22 Faults, Probable Causes, Possible Remedies

22.1 FAILS TO COOL .1 No part is working;

.1 Lack of voltage to the unit;.1 Check that doors closed and switches are turned on.

.2 Compressor, condenser fan and evaporator fan not working;.1 Cooling system has run out of refrigerant;

.1 Contact STULZ technician or service department;.2 Compressor mechanically defective;

.1 Contact STULZ technician or service department. .3 Compressor and condenser fan working, evaporator fan not working;

.1 fan capacitor is defective;.1 Replace fan capacitor;

.2 Evaporator fan defective;.1 Replace fan.

.4 Condenser and evaporator fan working, compressor not working;.1 Where present, compressor circuit breaker defective;

.1 Replace circuit breaker and check efficiency of the compressor'selectrical parts;

.2 Compressor start relay defective;.1 Replace compressor start relay;

.3 Where present, start-up condenser defective;.1 Replace start-up condenser;

.4 Compressor motor defective;.1 Contact STULZ refrigerant system technician or service department.

.5 High pressure switch defective;.1 Contact STULZ refrigerant system technician or service department;

.6 Where present, compressor remote control switch defective.1 Replace remote control switch.

.5 Evaporator and condenser fan and compressor working;.1 Adjustment thermostat defective or calibrated at a temperature exceedingthe temperature in the shelter;.2 When present, anti-freeze thermostat defective.

22.2 FAILS TO COOL SUFFICIENTLY.1 Evaporator fan working, compressor and condenser fan workingintermittently

.1 Service anti-freeze thermostat;.1 Clean evaporator.2 Check for any external causes which may limit the airflow to the inside circuit

.2 Where present, service low pressure switch;.1 Insufficient charge in the refrigerant circuit; Contact STULZ refrigerant system technician or service department;

.3 Where present, solenoid valve defective;.1 Replace solenoid valve coil;.2 Contact STULZ refrigerant system technician or service department;

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.2 Condenser fan, evaporator fan working, compressor workingintermittently;

.1 Where present, service high pressure switch;.1 Room temperature exceeding maximum temperature as shown ontechnical data plate;

.1 Ventilate room;

.2 Contact STULZ service department;.2 Dirty air filter,

.1 Clean or, if necessary, replace dirty air filter;.3 Dirty condenser;

.1 Clean condenser;.4 Air short-circuit,

.1 Check that no obstruction or obstacle are causing the expelled air to short circuit;.2 Check that requirements concerning minimum distance from a wall, from theceiling, from the electric cabinet or from any other air cooling unit are asdescribed in this manual;

.2 Service compressor heat protector,.1 Air temperature in shelter exceeding maximum temperature shown on unit'stechnical dataplate;.2 Same causes and relevant remedies as outlined under items 22.2.2.1.1/2/3/4;

.3 Evaporator fan working, condenser fan not working, compressor workingintermittently;

.1 fan capacitor is defective;.1 Replace fan capacitor:

.2 Condenser fan defective;.1 Replace condenser fan:

22.3 EXCESSIVE CONDENSATE FORMATION;.1 Shelter with protection level lower than IP54;

.1 Check that the self-adhesive seal between the cooling unit and the shelter has been correctly applied;.2 Check that the unit's locking panels have been correctly installed;.3 Check that there are no openings in the shelters.

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Air Acondicioning Schulz