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Featuring Ozone-safe HCF134a

Hitachi Centrifugal ChillersHC-F-GXG Higher-efficiency Type

　ARI temperature condition 1,463 kW to 4,571 kW (416 USRT to 1,300 USRT)

　JIS temperature condition 1,407 kW to 4,395 kW (400 USRT to 1,250 USRT)

Printed in Japan (H) MR-E060P 0709

Distributed by

Cooling water(condenser) TotalChilled water

(evaporator)Type

HC-F400GXGHC-F500GXGHC-F630GXG

0.440.440.75

0.470.470.85

0.910.911.59

Cooling water(condenser) Total

(Unit: m3)

Chilled water(evaporator)Type


0.751.181.18

0.851.831.83

1.593.013.01

Precautions for Equipment Design

Water Quality ControlBecause strain or corrosion on evaporator or condenser tubes of the centrifugal chiller depends on the quality of water used, sufficient control is recommended regarding the quality of circulating water that is used as chilled or cooling water.

MaintenanceMaintenance, other than daily operation and regular maintenance, requires expertise. Please contact Hitachi when necessary. Improper maintenance might cause machine fault, oxygen deficiency accidents, fire, electric shock or other problems.

Safety Precautions Regarding use Carefully read the instruction manual before use and correctly operate the equipment.

Regarding installation(1) Avoid installing the unit in places where inflammable material (gasoline, thinner, etc.) is handled or where corrosive gas (ammonia, chlorine, etc.) is generated. Otherwise, fire may result.(2) Carrying-in work, installation work, foundation work, electrical work, various piping work, various interlock work and hot/cold insulation work are necessary. Improper work might cause overturn, electric shock, water leakage, refrigerant leakage, fuel leakage, oxygen deficiency accidents, burns or other problems.(3) Refrigerant outdoor discharge piping work and suction and exhaust piping work are necessary. Improper work might cause oxygen deficiency accidents or other problems.(4) Waterproofing is necessary on the floor surface of the place where the chiller unit is installed, as well as a drainage ditch around the installation place. Improper waterproofing might cause water leakage, resulting in water damage to surrounding facilities in the worst case.(5) Sufficient space for maintenance work must be kept around the unit. Insufficient space might obstruct safe operation and cause injury.

(1) Avoid places that are near fire or burning substances (for example, care shall be taken regarding radiation heat when installed together with a heating element such as boiler)

(2) Select a well ventilated place where room temperature is 40˚C or less and humidity is low. (Be careful as high temperatures may cause electrical fault and early corrosion of equipment. Allowable ambient humidity: max. 95%RH at 40C)

(3) Select a low-dust area. (Dust may cause electrical fault.)(4) Select a place that is convenient for inspection and maintenance, paying attention to lighting.)(5) Keep sufficient space for maintenance, including spaces for pulling tubes, disassembling the water chamber, and maintenance and repair.(6) To facilitate the lifting up/down of equipment, provide lifting hooks on the ceiling or keep a sufficient room height for setting a lifting pole.(7) Provide sufficient drainage.(8) Avoid direct sunlight.(9) Prepare city water source and receptacles for maintenance work.(10) Keep sufficient maintenance space at the entrance for carrying equipment out.

Water piping and ventilation works

Machine room and safety devices

(1) Chilled and cooling water piping shall be supported by pipe supports and carefully laid so that no strong force will act on the evaporator or the condenser.

(2) Be sure to install a 10-mesh strainer on the inlet piping of chilled and cooling water.(3) Chilled and cooling water piping shall be planned such that their flow is controlled on the chiller outlet side.(4) The water storage capacity of each type is as follows:

(5) Keep a sufficient ventilating flow rate.(6) The system shall be planned so that transient pressure pulsation, which causes the water suspension relay to malfunction, won't occur.

The ozone layer cuts harmful ultraviolet rays

Chlorofluorocarbons destroy the ozone layer to generate ozone holes

Serious menace to the existence of terrestrial life• Skin cancer, cataract and reduced harvests

SunOrdinary ultraviolet rays

Harmful ultraviolet rays

Surface of earth

Ozone layer

Ozone layerdestruction (ozone hole)

Chlorofluorocarbons, etc.Ozone holes are expanded to increase harmful ultraviolet rays.

100%

Conventional single-stage models

Comparison with 800 RT HFC134a Centrifugal Chiller

GXG series

Ele

ctric

pow

er c

onsu

mp

tion

19% saving of energy

81%

Structure of Model Name

* IPCC: Intergovernmental Panel on Climate Change

Large temperature differential chilled water systemSymbol for chiller typeStandard cooling capacity of compressor (RT)CFC's substitute adapted type (HFC134a used)Series code for chiller

Ozonelayer

protection

Energy saving

Globalwarmingprevention

GXG SeriesGXG Series

* Calculation condition COP of single-stage model: 4.90 COP of GXG series: 6.08 (JIS temperature condition)

High Energy-Saving EffectWorld's level of high efficiency [COP:5.6 to 6.3]

It is expected that the world’s demand for primary energy will

steadily increase with economic growth, and more importance

has come to be given to energy saving in order to cut the

ever-increasing consumption of electricity.

High-efficiency GXG Series Centrifugal Chillers that use HFC134a

are excellent products developed by Hitachi, fully utilizing its

advanced technologies and rich experience. They are active

throughout the world due to their high reputation and excellent

performance. By minimizing the flow loss of HFC134a refrigerant,

thoroughly re-examining the power loss of rotor and motor, and

employing a 2-stage economizer cycle, Hitachi succeeded in

greatly increasing efficiency.

Electricity consumption of the world is steadily increasing

Global Warming PreventionEnergy saving by higher-efficiency centrifugal chillers

Global warming refers to the phenomenon of global rising in

average atmospheric temperatures due to increased volume of

CO2 and methane as a result of burning fossil fuels such as

petroleum and coal. The 1995 IPCC* Report predicted that if the

emission of CO2, etc. continued as it was, the atmospheric

temperature would rise by as high as 2˚C by the end of the 21st

century and, as a result, the sea level would rise by approximately

50 cm from the present level.

In such circumstances, it is more strongly required to save the

energy consumed by air conditioners in order to cut CO2

emission.

Average temperature of the earth is still going up

Ozone layer ProtectionUse of HFC134a refrigerant has an ozone depletion potential of zero

Chlorofluorocarbons (CFCs) diffusing in the stratosphere are exposed to ultraviolet rays to be decomposed, separating

chlorine atoms. It is said that separated chlorine atoms combine with oxygen atoms in ozone to destroy the ozone.

Because HFC134a has no chlorine atoms, it does not destroy the ozone in the atmosphere.

Hitachi GXG Series Centrifugal ChillersShow a Remarkable Energy-Saving Effect and Are Friendly to the Global Environment

Depletion of the ozone layer in the stratosphere proves a serious menace to the existence of terrestrial life

1 2

To evaporator To economizer

Subcooling

Compression

Condensation

Expansion

Inter-cooling

Economizer

Enthalpy

Evaporation

Condenser

Refrigerant gas from economizerReduced theoretical power

Refrigerant from evaporator Refrigerant to condenser

1st stage impeller 2nd stage impeller

Step-up gear

Plan view

Cross-sectional view

High-efficiency CompressorIncreased compressor efficiency

3 dimensional blade impeller (2 stages) Vaned diffuser Low specific speed compressor enables the use of low-loss bearing structure

High-efficiency Refrigerating CycleIncreased refrigerating cycle efficiency

Economizer cycle (intercooler) Subcooler

High-performance Heat ExchangerIncreased efficiency resulted from improvedperformance of heat exchanger Employment of high-performance heat exchange tubes Optimal structural design of heat exchanger to match the behavior of refrigerant

Economizer cycle(Built in the condenser)

Subcooling cycle(Built in the condenser)

Effect of increased refrigerating cycle efficiency

Abso

lute

pre

ssur

e

Effect of single-stage cycle refrigeration

Effect of two-stage cycle refrigeration

Hitachi’s High Technology and Rich Experience Realized High-Efficiency Chillers

Three-dimensional blade impeller (two stages)The impeller with three-dimensional curved blades, which is low in internal flow loss, is employed to realize high efficiency in a wide operating range. The impeller is made of aluminum alloy with sufficient strength and manufactured by precision vacuum casting to give it ideal flow passages.

Vaned diffuserFor the diffuser, which is used to convert the velocity of refrigerant gas accelerated by the impeller into static pressure, vanes of small chord-pitch ratio and a high pressure recovery ratio were developed by computer design to realize high efficiency. The ideal diffuser shape, which is implemented by NC machines, realizes stable operation in a wide range from high to low load conditions.

Low-loss bearing structureDue to the employed 2-stage compression system, the speed of the compressor can be lowered, which results in reducing bearing loss.

2-stage compression economizer and subcooling cycleWith a vapor compression type chiller, the “heat of evaporation” that is generated when the state of the refrigerant changes from liquid to gas is used to cool chilled water in the evaporator. The lower the temperature of the liquid refrigerant that flows in the evaporator, the greater the heat of evaporation and the lower the quantity of circulated refrigerant. As a result, the power of the compressor is reduced and theoretical cycle efficiency increases. Economizer (intercooler) utilizes the self-cooling effect of refrigerant to lower the temperature of the refrigerant almost to the middle of condensing and evaporating temperatures. The employment of the 2-stage compressor makes it possible to employ the economizer cycle and thus increase efficiency. By employing the subcooler (a compact cooler built into the lower part of the condenser) to cool the liquid refrigerant, which is liquefied in the condenser, by means of cooling water, theoretical cycle efficiency is increased further.

By employing a three-dimensional blade impeller (2 stages), economizer subcooling cycle and high-performance heat exchanger tubes, Hitachi succeeded in greatly increasing efficiency

High-Efficiency CompressorHigh efficiency was achieved by employing precision cast three-dimensional blade impellers (two stages), vaned diffusers, and a low-loss bearing structure realized by lowering the specific speed of the compressor

High-Efficiency Refrigerating CycleThe economizer cycle and subcooling cycle are employed to increase the efficiency of the refrigerating cycle.

Evaporator and condenserThe high-performance heat exchanger tube is used in the evaporator and the condenser, and the arrangement of tube banks is optimized as well to improve the performance of the heat exchanger.

High-Performance Heat ExchangerThe high-performance heat exchanger tube is used.

To compressor 2nd stage suction

3 4

Key system

Key spline

CouplingHitachi's uniquekey-free coupling

Power transmittingsurfaceOccurrence of stress concentration

Key-free system

ImpellerImpeller

Key spline

Coo

ling

cap

acity

(%)

Alarm

30 32 34

50

100

Widenedoperatingrange

Rated pointCooling water inlet temperature (˚C)

Summer

Winter 1st unit

100%

2nd unit1st unit

Expanded operating

range2nd unit

Example of cooling water temperature rise due to increased external air temperature

Before stopping due to “High Pressure Cut”, an alarm signals to activate the overload prevention control function to continue operation.

Due to the expanded operating range of the 1st chiller unit, energy saving can be achieved totally, including in the power of the 2nd chiller unit and accessories (chilled and cooling water pumps

Realized High Operability and Comfort, such as Wider Operating Range and Low Noise High-Reliability and Minimized Maintenance Necessity

Wider Operating Range

Low NoiseLow noise is achieved, and also high-frequency noise that hurts the ears is cut.

The fluid dynamic design of the compressor interior was optimized to achieve low noise. Because a 2-stage compressor is employed, speed is lowered and noise, especially high frequency noise, is cut remarkably.

Accessories

Continuously operable without worry even on very hot days

Stable operation continues even when cooling water temperature rises in hot summer and condenser pressure rises due to proceeding tube fouling.

Low-load operation is available throughout the year without special devices

Conventionally the lower limit point for capacity control has been set mechanically, so that the capacity at the lower limit point increases in intermediate seasons or winter. With the GXG series, operation is stable up to 20% even at low cooling water temperatures, without any special devices (hot gas bypass valve, etc.), due to microcomputer control.

Even in seasons where external air temperature is low, the expanded operating range of single unit chiller assures a high energy saving effect.

While conventional models require a controlling cooling water inlet temperature of 20˚C or higher, GXG series can operate up to a cooling water inlet temperature of 12˚C, expanding further the capacity range.

Step-up gear 2nd stageimpeller

1st stageimpeller

Filter dryer

Filter dryer

EconomizerCondenserSubcooler

Fully automatic refrigerant cleaner

EvaporatorOutlet

Inlet

Service valve

Compressor

Condensing pressure

Evaporating pressure

Oiling pressure

M

M

Motor

Motor

00

Cooling capacity (%) 100%

100%

Lower limit of vane controlwith conventional models

Cooling w

ater inlet te

mperature 32˚C

Cooling water inlet te

mperature 12˚C

Compressor UnitKey-free shaft coupling is usedA friction force transmission system that is free from stress concentration further improves strength against low-cycle fatigue.

Purge is unnecessaryPurging is unnecessary because internal pressure is higher than atmospheric pressure and no air leaks into the machine during operation. The loss of refrigerant is also reduced.

Filter dryer thoroughly cuts residual water in the machineTo remove especially the water contained in polyester oil and thus prevent lubricating oil from degrading, a filter dryer is installed as standard with sufficient margin.

Fully automatic refrigerant cleaner is installed as standardThis cleaner automatically recovers the oil mixed in the refrigerant and returns it to the oil tank while the chiller is running, reducing the frequency of adding oil externally.

Fully equipped service valvesMain valves are provided for filter dryers, oil strainers and pressure gauges and protective tubes are mounted on thermometers to make possible replacement by partial disassembly. The leakage of refrigerant is reduced.

Lower limit ofvane controlwith GXG series, approx. 20%

Mot

or in

put

(%)

Cooling water

Outlet

Inlet

Cooling water

5 6

1. This figure shows general characteristic for GXG series and slightly varies according to the model. 2. Cooling water temperature condition at part load conforms to JIS B8621 centrifugal chiller and changes in proportion to cooling capacity.

Hitachi High-Efficiency Centrifugal Chillers Show Excellent Energy SavingsA higher energy saving effect can be achieved when a large temperature differential chilled water system is employed.

Type [HC-F_GXG]

Cooling Capacity

ChilledWater

CoolingWater

Expected Motor Input

Expected COP

Installation Dimensions

Mass

Insulating Area

Flow Rate

Pressure Drop

Connection Pipe Nominal Size

Number of passes

Flow Rate

Pressure Drop


Number of Passes

Length (A)

Width (B)

Height (C)

Length for Pulling Tubes

Operating in Mass

Carrying in Mass

F400GXG F500GXG F630GXG F800GXG F1000GXG F1250GXG

400

1,407

242

96

200

3

293

49

200

2

253

5.56

4,260

2,200

2,350

3,500

13.6

11.7

33

500

1,758

302

50

200

2

366

67

250

2

305

5.76

4,100

2,200

2,350

3,500

13.6

11.7

33

630

2,215

381

49

250

2

457

50

250

2

379

5.85

4,600

2,650

2,600

4,000

19.2

16.5

45

800

2,813

484

60

250

2

581

74

300

2

463

6.08

4,600

2,650

2,600

4,000

19.2

16.5

45

1,000

3,516

605

49

300

2

726

52

300

2

578

6.08

5,300

3,350

3,350

4,000

30

23.5

52

1,250

4,395

756

61

300

2

907

76

350

2

726

6.05

5,300

3,350

3,350

4,000

30

23.5

52

Chilled water inlet temperature 12ºC, outlet temperature 7ºC, cooling water inlet temperature 32ºC, outlet temperature 37ºC

Specifications

Type [HC-F_GXG]

Cooling Capacity

ChilledWater

CoolingWater

Expected Motor Input

Expected COP

Installation Dimensions

Mass

Insulating Area

Flow Rate

Pressure Drop


Number of Passes

Flow Rate

Pressure Drop


Number of Passes

Length (A)

Width (B)

Height (C)

Length for Pulling Tubes

Operating in Mass

Carrying in Mass

F400GXG F500GXG F630GXG F800GXG F1000GXG F1250GXG

USRT

kW

m3/h

kPa

DN

—

m3/h

kPa

DN

—

kW

—

mm

mm

mm

mm

ton

ton

m2

USRT

kW

m3/h

kPa

DN

—

m3/h

kPa

DN

—

kW

—

mm

mm

mm

mm

ton

ton

m2

416

1,463

226

84

200

3

285

46

200

2

253

5.78

4,260

2,200

2,350

3,500

13.6

11.7

33

520

1,828

283

44

200

2

355

63

250

2

305

5.99

4,100

2,200

2,350

3,500

13.6

11.7

33

655

2,303

357

43

250

2

448

48

250

2

379

6.08

4,600

2,650

2,600

4,000

19.2

16.5

45

832

2,926

453

53

250

2

569

71

300

2

463

6.32

4,600

2,650

2,600

4,000

19.2

16.5

45

1,040

3,657

566

43

300

2

711

50

300

2

578

6.33

5,300

3,350

3,150

4,000

30

23.5

52

1,300

4,571

708

53

300

2

889

73

350

2

726

6.30

5,300

3,350

3,150

4,000

30

23.5

52

Chilled water inlet temperature 12.3ºC, outlet temperature 6.7ºC, cooling water inlet temperature 29.4ºC, outlet temperature 34.7ºC

Specifications JIS temperature conditionARI temperature condition

7 8

1. This table is applicable to chillers manufactured for normal water.2. Capacity control range is 100 to approx. 20%3. Fouling factor is assumed to be 0.000086m2 ・ ˚C/W for both chilled and cooling water. Other foulingfactors may be met upon request.4. Standard Main power sources: 400V AC, 50Hz, 3-phase HC-F400GXG to F1250GXG5. Capacities: HC-F400GXG to F1250GXG: 4.5kVA6. Maximum working pressure is 0.7 MPa for both chilled and cooling water. If higher maximum working pressures is required, please specify during inquiry. (It is possible to produce it up to 1.6MPa)7. For water piping connections, see the dimensional outline drawing on page 9.8. COP values do not include auxiliary power.9. Specifications are subject to change without notice for technical improvement.

1. This table is applicable to chillers manufactured for normal water.2. Capacity control range is 100 to approx. 20%3. Fouling factor is assumed to be 0.000086m2 ・ ˚C/W for both chilled and cooling water. Other foulingfactors may be met upon request.4. Standard Main power sources: 400V AC, 50Hz, 3-phase HC-F400GXG to F1250GXG5. Capacities: HC-F400GXG to F1250GXG: 4.5kVA6. Maximum working pressure is 0.7 MPa for both chilled and cooling water. If higher maximum working pressures is required, please specify during inquiry. (It is possible to produce it up to 1.6MPa)7. For water piping connections, see the dimensional outline drawing on page 9.8. COP values do not include auxiliary power.9. Specifications are subject to change without notice for technical improvement.

Y-Y view

Foundation Drawing and Maintenance Dimensions (HC-F400GXG to 1250GXG)

Maintenance dimensionsFoundation dimensionsL1 L2 L3 L4 L5 L6 L7 L8 L9 L10

3,300

3,300

3,800

3,800

3,760

3,760

1,230

1,230

1,630

1,630

2,150

2,150

1,710

1,710

2,110

2,110

2,630

2,630

2,270

2,270

2,670

2,670

3,530

3,530

3,800

3,800

4,300

4,300

4,300

4,300

1,500

1,500

1,600

1,600

1,600

1,600

2,000

2,000

2,400

2,400

2,400

2,400

2,000

2,000

2,400

2,400

3,300

3,300

800

800

800

800

1,400

1,400

500

500

500500700700

Type

HC-F400GXGHC-F500GXGHC-F630GXGHC-F800GXGHC-F1000GXGHC-F1250GXG

(Unit: mm)

Rubber cushion,location of base plate set

Drainage ditchor maintenance work

Space for pulling tubesTo be provided on either A or B side

Rubber cushion

Chiller base

Nut, washer, rubber bushing (out of scope)

Foundation bolt (M24x400) (out of scope)

Base plate(out of scope)

225100

240

390

600

L2

430

240

240

L3 L4 400

135˚

150

200

400

99

295

105

150

L1

Min. L5

L8

Min. L9 Min. L9

Min. L5

Min

. L4

Min

. L6

Min

. L7

Min

. L10

Maintenance space

Maintenance spaceMaintenance space

300300Side B Side A

Y

Y

Item

Main equipment

Auxiliary equipment

Coating

Out of scope of supply

Standard scope

Compressor, Main motor, Lubricant, Heat exchanger

Safety device, Control panel, Starter, Accessories

Chiller main unit: Anti-corrosive primer coating, Control panel/starter: Finish coat (color: Munsell 5Y7/1 semigloss)

Foundation work, Carrying-in, Installation, Piping work, Cold insulation, Primary and secondary side electrical wiring, Commissioning for total system, Forced ventilation system, Outdoor discharge piping for safety valve,Companion flange, Bolt, Nut, Gasket, Foundation bolt, Refrigerant

The following table shows a standard scope of supply and actual scope depends on contract. Please consult with our sales staff or distributor.

Dimensional Outline Drawing (HC-F400GXG to 1250 GXG)

Positional dimension of nozzle (mm)a

Type

480480520520685685


b900900960960

12851285

c440440360360535535

d620620780780860860

e150150150150202202

f400400580580800800

g630630650650797797

h360360440440600600

i480480500500770770

Positional Dimension of Water Piping

Scope of Standard Supply

(Unit: mm)

Chilled water outlet

Chilled water inlet (for two-pass system)

Width (B)

Hei

ght

(C

)

Cooling water inlet

Cooling water outlet

a

hgfe

b

c

d

Compressor

Control panel

Motor

Length (A) for 2-pass system

Side ASide Bi

Motor terminal box

Evaporator

Condenser

Safety valve for evaporator

Safety valve for condenser

This dimensional outline drawing shows a standard nozzle location.Please consult with our sales staff or distributor in case of 3-pass system.

9 10

Y-Y view

Foundation Drawing and Maintenance Dimensions (HC-F400GXG to 1250GXG)

Maintenance dimensionsFoundation dimensionsL1 L2 L3 L4 L5 L6 L7 L8 L9 L10

3,3003,3003,8003,8003,7603,760

1,2301,2301,6301,6302,1502,150

1,7101,7102,1102,1102,6302,630

2,2702,2702,6702,6703,5303,530

3,8003,8004,3004,3004,3004,300

1,5001,5001,6001,6001,6001,600

2,0002,0002,4002,4002,4002,400

2,0002,0002,4002,4003,3003,300

800800800800

1,4001,400

500500500500700700

Type


(Unit: mm)

Rubber cushion,location of base plate set

Drainage ditchor maintenance work

Space for pulling tubesTo be provided on either A or B side

Rubber cushion

Chiller base

Nut, washer, rubber bushing (out of scope)

Foundation bolt (M24x400) (out of scope)

Base plate(out of scope) 225

100

240

390

600

L2

430

240

240

L3 L4 400

135˚

150

200

400

99

295

105

150

L1

Min. L5

L8

Min. L9 Min. L9

Min. L5

Min

. L4

Min

. L6

Min

. L7

Min

. L10

Maintenance space

Maintenance spaceMaintenance space

300300Side B Side A

Y

Y

Item

Main equipment

Auxiliary equipment

Coating

Out of scope of supply

Standard scope

Compressor, Main motor, Lubricant, Heat exchanger

Safety device, Control panel, Starter, Accessories

Chiller main unit: Anti-corrosive primer coating, Control panel/starter: Finish coat (color: Munsell 5Y7/1 semigloss)

Foundation work, Carrying-in, Installation, Piping work, Cold insulation, Primary and secondary side electrical wiring, Commissioning for total system, Forced ventilation system, Outdoor discharge piping for safety valve,Companion flange, Bolt, Nut, Gasket, Foundation bolt, Refrigerant

The following table shows a standard scope of supply and actual scope depends on contract. Please consult with our sales staff or distributor.

Dimensional Outline Drawing (HC-F400GXG to 1250 GXG)

Positional dimension of nozzle (mm)a

Type

480480520520685685


b900900960960

12851285

c440440360360535535

d620620780780860860

e150150150150202202

f400400580580800800

g630630650650797797

h360360440440600600

i480480500500770770

Positional Dimension of Water Piping

Scope of Standard Supply

(Unit: mm)

Chilled water outlet

Chilled water inlet (for two-pass system)

Width (B)

Hei

ght

(C

)

Cooling water inlet

Cooling water outlet

a

hgfe

b

c

d

Compressor

Control panel

Motor

Length (A) for 2-pass system

Side ASide Bi

Motor terminal box

Evaporator

Condenser

Safety valve for evaporator

Safety valve for condenser

This dimensional outline drawing shows a standard nozzle location.Please consult with our sales staff or distributor in case of 3-pass system.

9 10

Featuring Ozone-safe HCF134a

Hitachi Centrifugal ChillersHC-F-GXG Higher-efficiency Type

　ARI temperature condition 1,463 kW to 4,571 kW (416 USRT to 1,300 USRT)

　JIS temperature condition 1,407 kW to 4,395 kW (400 USRT to 1,250 USRT)

Printed in Japan (H) MR-E060P 0709

Distributed by

Cooling water(condenser) TotalChilled water

(evaporator)Type


0.440.440.75

0.470.470.85

0.910.911.59

Cooling water(condenser) Total

(Unit: m3)

Chilled water(evaporator)Type


0.751.181.18

0.851.831.83

1.593.013.01

Precautions for Equipment Design

Water Quality ControlBecause strain or corrosion on evaporator or condenser tubes of the centrifugal chiller depends on the quality of water used, sufficient control is recommended regarding the quality of circulating water that is used as chilled or cooling water.

MaintenanceMaintenance, other than daily operation and regular maintenance, requires expertise. Please contact Hitachi when necessary. Improper maintenance might cause machine fault, oxygen deficiency accidents, fire, electric shock or other problems.

Safety Precautions Regarding use Carefully read the instruction manual before use and correctly operate the equipment.

Regarding installation(1) Avoid installing the unit in places where inflammable material (gasoline, thinner, etc.) is handled or where corrosive gas (ammonia, chlorine, etc.) is generated. Otherwise, fire may result.(2) Carrying-in work, installation work, foundation work, electrical work, various piping work, various interlock work and hot/cold insulation work are necessary. Improper work might cause overturn, electric shock, water leakage, refrigerant leakage, fuel leakage, oxygen deficiency accidents, burns or other problems.(3) Refrigerant outdoor discharge piping work and suction and exhaust piping work are necessary. Improper work might cause oxygen deficiency accidents or other problems.(4) Waterproofing is necessary on the floor surface of the place where the chiller unit is installed, as well as a drainage ditch around the installation place. Improper waterproofing might cause water leakage, resulting in water damage to surrounding facilities in the worst case.(5) Sufficient space for maintenance work must be kept around the unit. Insufficient space might obstruct safe operation and cause injury.

(1) Avoid places that are near fire or burning substances (for example, care shall be taken regarding radiation heat when installed together with a heating element such as boiler)

(2) Select a well ventilated place where room temperature is 40˚C or less and humidity is low. (Be careful as high temperatures may cause electrical fault and early corrosion of equipment. Allowable ambient humidity: max. 95%RH at 40C)

(3) Select a low-dust area. (Dust may cause electrical fault.)(4) Select a place that is convenient for inspection and maintenance, paying attention to lighting.)(5) Keep sufficient space for maintenance, including spaces for pulling tubes, disassembling the water chamber, and maintenance and repair.(6) To facilitate the lifting up/down of equipment, provide lifting hooks on the ceiling or keep a sufficient room height for setting a lifting pole.(7) Provide sufficient drainage.(8) Avoid direct sunlight.(9) Prepare city water source and receptacles for maintenance work.(10) Keep sufficient maintenance space at the entrance for carrying equipment out.

Water piping and ventilation works

Machine room and safety devices

(1) Chilled and cooling water piping shall be supported by pipe supports and carefully laid so that no strong force will act on the evaporator or the condenser.

(2) Be sure to install a 10-mesh strainer on the inlet piping of chilled and cooling water.(3) Chilled and cooling water piping shall be planned such that their flow is controlled on the chiller outlet side.(4) The water storage capacity of each type is as follows:

(5) Keep a sufficient ventilating flow rate.(6) The system shall be planned so that transient pressure pulsation, which causes the water suspension relay to malfunction, won't occur.

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