Technical Description Series EET-EEF-EHET-EHEF - Hitema · 2016. 2. 19. · Technical Description Screwseries 6 Free Cooling Logic Axial Fans AxialfansEBM-Papst,conformingtoCE. External

TECHNICAL DESCRIPTION of BIG evolution CHILLERS

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Technical Description

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General description

EET/EEF (Ecology Efficiency Technology) and EHET/EHEF (Ecology High Efficiency Technology – Class A)

are chillers of BIG evolution series operating with refrigerant fluid R-134-A. These chillers are PED

certificated TUV Italy number 0948, with air condensation and axial fans complete “Free-cooling” section

(only for models EEF and EHEF) to guarantee a high energy saving. The nominal cooling capacities are

210÷1500 kW in standard condition. They are designed for use both in the process and comfort sectors.

The chillers are equipped with all the components that ensure automatic cooling of water or a

water/glycol solution.

To guarantee maximum operating safety the units have two completely independent refrigeration

circuits and they are supplied with a full oil and refrigerant load after having been factory tested with

water.

Construction and Panel

(Structure)

The Chillers are designed for outdoor

installations, having maximum corrosion

protection, with all parts being of heavy

gauge , galvanised steel construction,

polyester powder painted in RAL 7035 (all

other RAL upon request). The base is of 3

mm gauge galvanised steel channels,

polyester-powder painted RAL 7035,

interconnected using special rivets with

elevated mechanical characteristics.

The inner hidden frame parts are

constructed of galvanised steel.

Holes (ø 56 mm) are seated in the base,

where the bars can be fitted for lifting the

unit.


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Panels (where fitted) are made of suitable

gauge galvanised steel, polyester-powder

painted in RAL 7035 and provided with

water-proof gasket.

All parts of frame and cabinet are built by

Hitema itself . The steel frame is strongly

stiffened and a particular care is taken to

the weights distribution, in order to avoid

excessive distortions during the handling

and transport of chiller, which could

damage the refrigerant circuit and the coils

of condenser/ water battery.

All bolted connections are done with

double lock washer.

Screw Compressors

These chillers are equipped with Bitzer Screw

Compressors. The Screw compressors are with

cast iron casing and rotors manufactured from

forged steel and suitable for operating at the

speed of 2980 rpm. The lubricating system

includes an oil reservoir with sufficient capacity to

provide oil at all times of the compressor

operation. Compressors are protected with a low

refrigerant pressure cut out, a high refrigerant

pressure cut out switch, a differential oil pressure

switch, a chilled water low temperature switch. It

is possible to manage the compressors, through

HITEMA Software, under unfavourable

conditions that otherwise could bring

mechanical and electrical damages to the

compressor motor.


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Shell and Tube Evaporator

Shell and tube is built for maximum exchange of heat

between the refrigerant and the fluid to chill. The outer

shell is completely insulated with a closed cell anti-

condensate sheet. Also legs and supports are insulated in

order to avoid corrosion due to air vapour condensate.

Chillers is designed for heat exchange fouling factors for

water (glycol 20% as 0.000086 m²K/kW) in order to get a

water velocity until 1.5 m/s.

It is available version with anti-freezing electrical

resistance (as optional).

Air Refrigerant Exchanger


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Condensing battery

The air chilled condenser is a copper tubeand aluminium finned coil. The specialcircuit on the coolant side is made to obtainmore circuits and permits sub-cooling of thecoolant by about 5 K. The containmentstructure is in aluminium as protectionagainst the elements. The upper bendedplate support and frame of coils is HITEMAspecial design. The coils are supported inorder to discharge the weight on the mainframe beams and to avoid an excessivedistortion of coils during the transportation,handling and operating.

The air flow is canalized by steel panels inorder to achieve the best operatingconditions of fans; the panels are providedwith handles in order to have a easy wayfor removing during the maintenancephases.

Low Noise and Super Low Noise Version (as optional)

Low noise version and Super Low Noiseversion allow a more noise reduction thankto fans installation with low number ofrevolutions (EC Fans) and a special bladesconfiguration, but guaranteeing a highefficiency due to larger size of heatexchangers. The cabinet is very strong andbuilt using proper mechanical shrewdnessin order to get the damping of inducedvibrations from refrigerant and hydrauliccircuit. Compressors are covered with aisolating material internal covered box.


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Finned pack type in aluminium with expanded copper pipes. Free cooling battery is installed in series at

the condenser (on air side) and in series with the evaporator (on water side). It allows the use

contemporary of mechanical refrigeration and free cooling mode. The particular installation of the coil

permits easy cleaning of the finned pack.

Free Cooling and condenser coils are easily accessible to allow

easy inspection and cleaning of the same, in this way they are

always guaranteed the best conditions of operation.

All battery headers are provided with hose holder and

special designed clamps in order to avoid loosening of

rubber hoses, these type of connection ensure more

operating reliability and easier maintenance.

Integrated Free Cooling (designed for EEF/EHEF series)


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Free Cooling Logic

Axial Fans

Axial fans EBM-Papst, conforming to CE.

External rotor type motor designed for

phase control and protected against

overloads and overheating thanks to a

built-in thermal overload cut-out.

Accident prevention grill. Blades with

protective paintwork, coupled directly to

the motor.

EC axial fans (as option)

To reduce electrical consumptions and the noise type EC axial fans are used (brushless motorsand with inverter regulation). With EC motors the switch is by a control circuit that manages theclosure and the opening of transient states of power. In EC motors brushes are replaced withelectronic components, the advantages of this technology is high efficiency, low motortemperatures, short motor dimensions, independence of number of revolutions from frequencyand voltage, ease of cabling compared to VFD AC motors.

Refrigeration circuit

The refrigeration circuit is made in copper pipes and includes the following components for all models:

• Electronic Expansion valve with external equalisation (Sporlan Type);

• Cut-off cocks on the compressor supply and on the return line (not for all models);

• Shut-off valve on liquid line;• Interchangeable filter-drier;• Solenoid valve;• Liquid and humidity indicator;• Crankcase oil heater;• High pressure switch automatic reset

and manual reset;

• Low pressure switch; • Level oil indicator;• Safety valve (high pressure line);• Suction and discharge shut off valve;• Pressure transducers;• Safety valve for evaporator;• Thermostatic valve for injection line;• Solenoid valve for injection;• Liquid receiver;• High and low pressure gauges.


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Economizer (Plate Type)

EET/EEF/EHET/EHEF are equipped with economizer.

Economizer is a device designed to improve both cooling

capacity and efficiency of the system, by providing an

additional sub-cooling, achieved with the addition of an

intermediate plate heat exchanger, expansion valve and the

cross flow refrigerant circuits.

Oil separator

(for low temperatures)

To avoid that at low loads oil could becaught and not lost in the refrigerant circuitan oil separator is positioned at the outletof compressor.


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Water circuit

The hydraulic circuit in carbon steel is completelyinsulated with a new insulating material made up of16 mm “closed cell” insulation and 3 mm of “opencell” insulation onto a special Anti-UV material isglued. Pumps can be Inverter Driven (as optional).

It consists of:

• double pump directly managed by pCO• manifolds and connection pipes of high thickness;• evaporator with water discharge valve;• flow switch;• pressure indicator with gauges;• valve between water circuit and gauges;• water safety valve;• nipple vents;• evaporator inlet temp. sensor;• evaporator outlet temp. sensor;• free cooling sensor;• safety valve low/high pressure;• predisposition for further sensor at Customer use

All hydraulic circuit including free cooling, evaporator, connections, etc. are tested under 10 barg

pressure for at least 48 hours.

Electric panel

The electrical panel is enclosed inside the

unit and, consequently, protected to a

rating of IP54. It is easily accessible by

opening two doors. The main switch with

door interlock complies with the EIC

standard. Wiring complies with the IEC. The

electrical panel includes fuses and thermic

protection for the compressors and

magneto-thermic for the fans, motor

protection to IEC 947, terminals for all

external connections and transformer for

auxiliary circuit.

EET/EEF/EHET/EHEF screw compressors are part

winding or star-delta starting, with phases sequence

protection and volt-metric relay. The auxiliary electric

part is protected by fuses and the electrical panel has

air vents to ensure an adequate air cooling


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The water chiller with air condensation operating in thefree-cooling mode are controlled by a microprocessor. Theelectronic chiller control is performed by a control systemCarel on which Hitema software 3.5 is loaded.Programming and input the nominal values (operatingdata) are done directly on the display that also shows anymalfunctions giving a description of it.There is also a visualalarm (and acoustic). The parameters set are maintainedalso in the event of a power cut.

Environmental compatibility

High energy efficiency that provides a substantial reduction in energy consumption, has led to decrease inthe equipment CO2 foot print. The use of ecological refrigerants further help to raise the environmentalcredentials of the products range.

Quality guarantee

Hitema’s guarantee of quality and reliability is underpinned by the use of the very latest technologysupported by constant research and products that are manufactured in accordance with very stringentstandards.


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Peso-Weight Kg Materiali-Materials

Propieta' riservata-Riproduzione vietata a termine di legge-Copyrigt-Nachdruk verboten-Propriete reservee

Denominazione-Denomination

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SCHEMA FRIGORIF./IDRAULICO HYDRAULIC/REFRIGERATING DIAGRAM

COOLING BIG EVOLUTION DIS.-DRAW N.

PROGRAM. N.

REVISIONE

SFI-CBE-200ST01

00

Dis.to-DrawnScala-Scale Data-Date Ver.-VersionM.BURBA26/04/2013 R

CIRCUITO FRIGORIFERO ALTAPRESSIONE / HIGH PRESSUREREFRIGERANT CIRCUITCIRCUITO FRIGORIFERO BASSAPRESSIONE / LOW PRESSUREREFRIGERANT CIRCUITCIRCUITO IDRAULICO ACQUA CALDA /HYDRAULIC CIRCUIT WARM WATER

CIRCUITO IDRAULICO ACQUA FREDDA /HYDRAULIC CIRCUIT COLD WATER

LEGENDA /LEGEND

FLT1

SCA

HPM1

MC1

RM1

RL1 RLQ1

SCE1

SCE1

RC1

PDO

PRT1FLTA1

SFA1

SFC1

VSC1

PRT1

FLTA1

SFA1

VSC1

SFC1

OPTIONAL

OPTIONAL

INVERTER

RCA1

OPTIONAL

VEE1

ECO1

SVE1

RG2V

RA2V

RBP1

RAP1

OPTIONAL

RAE

TRSAP1

MV1

MV1

FLTI1

SCR1

SCR1

SCR1

TRSBP1

SVI1

SV1LIQ1

EVTS1

VRA1

RG2V

RA2V

VFC

TA

VSC

SCR1

EC

VSE1

VSA1

TM

RA1

MBP1

LP1

BSC1 OPTIONAL

MAP1

VRA1

TRSBP1

RE1

RI1

TFCFL

VFC

OPTIONAL

OPTIONAL

SFA

VSW

VSW

VSW

CIRCUITO IDRAULICO ACQUA CALDA /HYDRAULIC CIRCUIT WARM WATER

CIRCUITO IDRAULICO ACQUA FREDDA /HYDRAULIC CIRCUIT COLD WATER

LEGENDA /LEGEND

MW

VRAP

VRAP

VSA

VSA

VSCS

VSWSSFAS

SER

MP

VRAP

MP

VRAPMW

RAS

LLA

OPTIONALFLTY

BSP

BSP

MPR

MP

MP

MPR

OPTIONALFLTY

CON SERBATOIO - CON POMPA /WITH TANK - WITH PUMP

SENZA SERBATOIO - CON POMPA /WITHOUT TANK - WITH PUMP

VRAP

VSA

VSA




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PROGRAM. N.

REVISIONE

SFI-CBE-200ST01

00


VSRA

VSRA

VRAP

BSPOPTIONAL

OPTIONAL

AIR-WATER EXCHANGERSCAMBIATORE ARIA-ACQUASFC1-2

MW

VSW

FL

MP

TA

EC

SIGLA

MANOMETRO ACQUA

VALVOLA SICUREZZA ACQUA

WATER PRESSURE INDICATOR

SAFETY WATER VALVE

FLUSSOSTATO

ELETTROPOMPA DI PROCESSO 1 o 2

FLOW SWITCH

1 or 2 PROCESS PUMP

TEMPERATURA ACQUA USCITA EVAPORATORE (ANTIGELO)

TEMPERATURA ACQUA INGRESSO EVAPORATORE

DESCRIZIONE

EVAPORATOR OUTLET WATER TEMPERATURE (ANTIFREEZING)

EVAPORATOR INLET WATER TEMPERATURE

DESCRIPTION

VRA1-2 VALVOLE DI NON RITORNO ACQUA ONE WAY VALVE

VSA VALVOLA A SFERA SHUT OFF VALVE

VFC VALVOLA A DUE VIE 2-WAYS VALVE

RAS RESISTENZA ANTIGELO SERBATOIO TANK ANTIFREEZE HEATER

CIRCUITO IDRICO / HYDRAULIC CIRCUIT

VSCS VALVOLA DI SCARICO ACQUA SERBATOIO DISCHARGE VALVE FOR TANK

SFAS VALVOLA SFIATO ARIA MANUALE SERBATOIO AIR PURGE MANUAL VALVE FOR TANK

TFC TEMPERATURA ACQUA FREE COOLING FREE COOLING WATER TEMPERATURE

SER SERBATOIO ACQUA WATER TANK

std

optional

optional

optional

LLA LIVELLOSTATO ACQUA WATER LEVEL SWITCH

FLTY FILTRO ACQUA A Y WATER Y FILTER

RAE RESISTENZA ANTIGELO EVAPORATORE EVAPORATOR ANTIFREEZING HEATER optional

RA2V RESISTENZA ANTIGELO VALVOLA A 2 VIE 2 WAY VALVE ANTIFREEZING HEATER optional

RG2V ROTAZIONE GIORNALIERA VALVOLA A 2 VIE 2 WAY VALVE DAILY ROTATION optional

optional

BSP BOX INSONORIZZAZIONE POMPE NOISE INSULATION PUMP BOX optional




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PROGRAM. N.

REVISIONE

SFI-CBE-200ST01

00


MPR ELETTROPOMPA DI RICIRCOLO 1 o 2 1 or 2 RECYCLING PUMP optional

std

std

std

std

optional

std

std

std

std

optional

VRAP VALVOLE DI NON RITORNO ELETTROPOMPA PUMP ONE WAY VALVE

VSWS VALVOLA SICUREZZA ACQUA SERBATOIO SAFETY WATER VALVE FOR TANK

VSC VALVOLA DI SCARICO ACQUA DISCHARGE VALVE

SFA1-2 VALVOLA SFIATO ARIA MANUALE AIR PURGE MANUAL VALVE std

std

optional

optional

optional

optional

VSRA VALVOLA A SARACINESCA SHUT OFF VALVE optional




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PROGRAM. N.

REVISIONE

SFI-CBE-200ST01

00


VALVOLA SOLENOIDE INIEZIONE LIQUIDOSVI1-2 SOLENOID VALVE FOR INJECTION LINE

SENSORE LIVELLO OLIOPDO1-2 OIL LEVEL SENSOR

TRASDUTTORE ALTA PRESSIONETRSAP1-2 HIGH PRESSURE TRASDUCER

RA1-2 RUBINETTO DI ASPIRAZIONE SUCTION SHUT OFF VALVE

LIQ1-2

RL1-2

RM1-2

RLQ1-2

FLTI1-2

MBP1-2

MAP1-2

VSE1-2

VSA1-2

SCR1-2

SV1-2

LP1-2

HPM1-2

RC1-2

SCA

MV1-2

SCE1-2

MC1-2

SIGLA

SPIA DI FLUSSO / INDICATORE DI LIQUIDO

FILTRO DISIDRATATORE INIEZIONE LIQUIDO

MANOMETRO BASSA PRESSIONE

RUBINETTO DI MANDATA

RUBINETTO LINEA DEL LIQUIDO

RICEVITORE DI LIQUIDO

VALVOLA SICUREZZA (LINEA ALTA PRESSIONE)

MANOMETRO ALTA PRESSONE

VALVOLA SICUREZZA PER EVAPORATORE A FASCIO TUBIERO

LOW PRESSURE INDICATOR

HUMIDITY INDICATOR / SIGHT GLASS FOR LIQUID LINE

DISCHARGE SHUT OFF VALVE

LIQUID VALVE

LIQUID RECEIVER

FILTER DRYERS FOR INJECTION LINE

SAFETY VALVE (HIGH PRESSURE LINE)

HIGH PRESSURE INDICATOR

SAFETY VALVE FOR SHELL AND TUBE EVAPORATOR

PRESSOSTATO ALTA PRESSIONE RESET MANUALE

PRESSOSTATO BASSA PRESSIONE

VALVOLA SOLENOIDE LIQUIDO

VALVOLA DI CARICO SCHRADER

SCAMBIATORE DI CALORE AD ARIA (CONDENSATORE)

SCAMBIATORE DI CALORE AD ACQUA (EVAPORATORE)

RESISTENZA CARTER COMPRESSORE

MOTOVENTILATORI ASSIALI

COMPRESSORE

HIGH PRESSURE SWITCH MANUAL RESET

LOW PRESSURE SWITCH

SOLENOID-VALVE FOR LIQUID LINE

FILL-UP VALVE

AIR HEAT EXCHANGER (CONDENSER)

COMPRESSORS

COMPRESSOR CRANKCASE HEATER

WATER EXCHANGER (EVAPORATOR)

AXIAL FAN MOTORS

DESCRIZIONE DESCRIPTION

CIRCUITO FRIGORIFERO STANDARD / STANDARD REFRIGERATION CIRCUIT

std

std

std

std

std

std

std

std

std

std

std

std

std

std

std

std

std

std

optionalPARTIAL OR TOTAL HEAT RECOVERRECUPERATORE DI CALORE PARZIALE O TOTALERCA1-2

PRT1-2

FLTA1-2

GRIGLIA PROTEZIONE CONDENSATORE

FILTRO ARIA CONDENSATORE

CONDENSER GRID PROTECTION

AIR CONDENSER FILTER optional

BSC1-2 BOX INSONORIZZAZIONE COMPRESSORE NOISE INSULATING COMPRESSOR BOX optional

EVTS1-2 VALVOLA TERMOSTATICA ELETTRONICA ELECTRONIC THERMOSTATIC VALVE 1

stdEXPANTION VALVE FOR ECONOMIZER

SOLENOIDE VALVE FOR ECONOMIZER

ECONOMIZER / OPTIONAL FOR 407C VERSION

VALVOLA DI ESPANSIONE ECONOMIZZATORE

VALVOLA SOLENOIDE ECONOMIZZATORE

ECONOMIZZATORE / OPZIONALE PER VERSIONE IN 407C

VEE1-2

SVE1-2

ECO1-2 std

stdDISCHARGE COMPRESSOR TEMPERATURETEMPERATURA MANDATA COMPRESSORETM1-2

std

std

std

TRASDUTTORE BASSA PRESSIONETRSBP1-2 LOW PRESSURE TRASDUCER

std

std

std

FLT1-2 FILTRO DISIDRATATORE FILTER DRYERS std

std

RI1-2 RUBINETTO INIEZIONE LIQUIDO VALVE FOR INJECTION LINE std

RE1-2 RUBINETTO ECONOMIZZATORE VALVE FOR ECONOMIZER std

RAP1-2 RUBINETTO ALTA PRESSIONE HIGH PRESSURE VALVE std

RBP1-2 RUBINETTO BASSA PRESSIONE LOW PRESSURE VALVE std

std

Documents

Technical Description Series EET-EEF-EHET-EHEF - Hitema · 2016. 2. 19. · Technical Description Screwseries 6 Free Cooling Logic Axial Fans AxialfansEBM-Papst,conformingtoCE. External