water cooled screw flooded chiller · flooded type screw chiller for example: qwcwf qwcwf1080a1-...

T: 1800 953 260W: www.altituderefrigeration.com.auPostal Address:PO Box 384, Kellyville, NSW, 2155, Sydney, AustraliaPO Box 678, Oxenford, QLD, 4210, Gold Coast, Australia

WATER COOLED SCREW FLOODED CHILLER

0201

1

2

2 410 A H O 1

02

02

03

05

07

09

11

13

15

17

19

23

25

27

28

29

30

31

32

33

34

35

36

37

Brief Introduction

Model Introduction

Product Features

R22 Basic unit Specification(single head)

R22 Basic unit Specification(twin heads)

R22 Heat recovery unit Specification(single head)

R22 Heat recovery unit Specification(twin heads)

R22 Energy Correction Table(single head)

R22 Energy Correction Table(twin heads)

R134a Specification(single head)

R134a Specification(twin heads)

R134a Energy Correction Table(single head)

R134a Energy Correction Table(twin heads)

R22 Dimension (Single head)

R22 Dimension(twin heads)

R134a Dimension (Single head)

R134a Dimension(twin heads)

Engine room requirement

Unit transportation and installation

Safety valve and discharge piping installation

Electrical wiring

Water system piping

Water quality management

Standard supply details

In today's increasingly shortage of energy in the world, we successfully launched a new generation of high-efficiency and high reliability flooded type water cooled screw chillers. The unit's full-load coefficient of performance (COP)reaches 5.7.This series of products is composed of electric power-driven screw compressors, high-efficiency heat exchangers, and advanced throttling mechanisms. The unit can not only provide the cold source for the central air-conditioning projects and industrial production, but also solve the problem of the supply of sanitary hot water according to the customer's requirements. It fully demonstrated the multi-functional features of the unit.The flooded type screw chiller has many advantages such as compact structure, environmental protection and energy saving, intelligent control, etc. the unit are widely used in hotels, restaurants, schools, theaters, shopping malls, office buildings, residential buildings, hospitals and other air-conditioned places, can also be used as cooling process for nuclear power, plastic chemicals, precision instruments and etc. with the improvement of international standards for building energy efficiency, the screw chiller will become even more popular.

Refrigerant: 1-R134a, omitted is R22

Compressor: 0-start up type, omitted is semi-hermetical type

Function: omitted is basic type, H-heat recovery type

Deign version

Unit no.

Compressor amount

Flooded type screw chiller

For example:

QWCWF

QWCWF1080A1- Unit no.is 080, design version A, refrigerant is R134a, single compressor flooded type screw chillerQWCWF2410BH- Unit no.is 410, design version B, refrigerant is R22, double compressors flooded type screw chiller with heat recovery function.

PRODUCT OVERVIEW

MODELSPECIFICATION

CONTENT

WATER-COOLED SCREW FLOODED CHILLER

0403

HIGH EFFICIENCY AND ENERGY SAVING1

3

RELIABLE QUALITY2

EASY INSTALLATION3

INTELLIGENT CONTROL4

The use of water –cooled flooded type high efficiency screw compressor, the most advanced tooth design, high-precision processing technology, high volumetric efficiency; apply internationally famous brands fluorine-resistant motor, under various conditions are in the best efficiency.

High efficient flooded evaporator design make total heat transfer coefficient is three times of a dry type evaporator. The unit's energy efficiency ratio can be increased by 12%. The chilled water flows inside of the tube, the scale is easy to clean, the evaporating tube has a dense ring-shaped slit to form the vaporization core and strengthen the heat transfer efficiency on the outside of the tube. Enhancing inner side of the pipe heat transfer ribs to increase water side perturbation and turbulent heat exchange, which can delay scaling

Efficient condenser design, narrow sharp and high tooth, fine processing, thin liquid film, large heat transfer area, better spoiler effect.

The compressor has stepless control, the capacity of the unit changes according to loading to ensure a stable outlet water temperature. At the same time, the unit energy consumption is reduced, the partial load energy efficiency is increased by 15%

Waste heat and total heat recovery technology, the unit generates domestic hot water by absorbing condensing heat under cooling mode, without any energy consumption and emissions pollution, heat recovery can improve the unit’s operating conditions, improve operating efficiency and reduce unit operating costs.

We have special equipment manufacturing qualifications and excellent manufacturing equipments.

The patent-designed full-year cooling differential pressure valve(optional) ensures the unit's annual reliable cooling operation.

Patented design of"oil control system":built-in high-efficiency oil separator. Oil supply with pressure difference, no oil pump. Unique concentrated ejection of oil return ensures that the surface of the heat exchange tube is free of oil film thermal resistance, improve the heat exchange efficiency, and an efficient secondary oil separator combined with external machinery to ensure the efficient oil separation.

Compressor

Oil separator

Condenser

Evaporator

Maximum 8 units can be grouped control to simplify operation management and reduce the risk of misoperation.Automatically record operating parameters and fault SMS function, the factory provides professional technical services at any time.

Advanced Siemens PLC microcomputer controllerUser-friendly operation interface, beautiful interface, easy operation: users only need to switch machine, mode selection, water temperature setting can complete the unit operation:Stepless energy control, water temperature control accuracy up to ±0.5°C, to ensure indoor comfort;The advanced remote central monitoring system(optional) can realize multiple unit group control, simplify operation management, judge air conditioning load automatically, and optimize system operation efficiency;

Perfect control system protection: the compressor adopts multiple protections to completely prevent the rotor from jamming or motor overheating and burning. The real-time monitoring and control of high and low pressure, exhaust temperature, operating current, and in/out water temperature can ensure the safe operation of the unit. Multi-channel protection such as water flow, antifreeze, low pressure and water temperature monitoring completely avoids the possibility of frost cracking in the evaporator tube.

The pipe connection can be changed freely according to customer requirements, starter cabinets along with the unit can save the clients’ extra expense; refrigerants and lubricating oils has been filled before delivery; only needs to connect the water pipe and power supply at site; unit components are flexible connected and they are easy to disassemble and installation.

The special features are: the unit is neatly arrange, compact and small in size, beautiful appearance and exquisite structure.

PRODUCT FEATURES


0605

4

193 222 260 294 324

1450

2050

1650

2250

1450

2200 2200 2250

16501550

353 380 400

1600

2300

1700

2500

1700

2500

0

5

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Weight

Operation weight

Semi-hermetical screw type

Flooded type high efficiency

Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

ChargeS

izeLength

Width

Height

Weight

Weight

Operation weight



Shell and tube type

Model QWCWFModel QWCWF

Chilled water Cooling water

Cooling working condition

Operation range

Water inlet Water outlet

Water outlet Water inlet and outlet difference


Water inlet Water inlet and outlet difference



Operation range




Water inletWater inlet and outlet difference

Note:1, “a”- voltage is 6000V, “b”-voltage is 10000V, please note the voltage when you make a order;2, The design, manufacture, test of the unit is based on GB/T18430.1-2007;3, The cooling capacity above is based on chilled water outlet 7°C, cooling water inlet temp. 30°C;4, For the details selection please contact with our company, we will do our best to meet your


Direct start

R22 BASIC TECHNICAL PARAMETERSINGLE HEAD


0807

5

1850 1850 1850 1850 1850 2100 2100

21502200 2200 2300 2300 2300

1800

96+96 118+118 138+138 138+177 171+171 177+177 193+193 222+222 222+260 222+260 260+260 294+294 294+324

25502100 2100 2100 2100

294+324 353+353 353+380 400+400 406+487 471+471 471+541 541+541(2X25.8)a

/(2x15.3)b(25.8+29.8)a

/(15.3+17.7)b(2X29.8)a

/(2x17.7)b(2X34.2)a

/(2x20.3)b(29.8+34.2)a

/(17.7+20.3)b

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Weight

Operation weight



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

ChargeS

ize

Length

Width

Height

Weight

Weight Operation weight



Shell and tube type

Model QWCWF Model QWCWF



Operation range







Operation range







Direct start

R22 BASIC TECHNICAL PARAMETERDOUBLE HEAD


09 10

6

193 222 260 294 324 353 380 400

Cooling capacity

Power input

Rated currentPower type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Weight Operation weight



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flowPressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

RefrigerantType

ChargeS

ize

Length

Width

Height

Weight

Weight

Operation weight



Shell and tube type




Operation range







Operation range





Note:1, The design, manufacture, test of the unit is based on GB/T18430.1-2007;2, The cooling capacity above is based on chilled water outlet 7°C, cooling water inlet temp. 30°C;3, Partial heat recovery working condition: water inlet 40°C, water outlet 45°C;4, For the details selection please contact with our company, we will do our best to meet your needs.


Heat recovery

Heat recovery

Water flow

Pressure drop

Pipe

Heat recovery

Heat recovery

Water flow

Pressure drop

Pipe

R22 HEAT RECOVERY TYPETECHNICAL PARAMETERS(SINGLE HEAD)


11 12

7

96+96 118+118 138+138 138+177 171+171 177+177 193+193 222+222 222+260 222+260 260+260

2200 2200

294+294 294+324 294+324 353+353 353+380 400+400 406+487 471+471 471+541 541+541

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type


Pipe

Refrigerant

Type

Charge

Size

Length

WidthHeight

Weight

WeightOperation weight



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type


Pipe

Condenser

Type


Pipe

RefrigerantType

ChargeS

ize

Length

Width

Height

Weight

Weight

Operation weight



Shell and tube type

Model QWCWFModel QWCWF



Heat recoveryHeat recovery

Heat recovery

Water flow

Pressure drop

Pipe

Heat recovery

Water flow

Pressure drop

Pipe

Chilled water Cooling water Chilled water Cooling water


Operation range

Water inlet

Water outlet

Water outlet

Water inlet and outlet difference




Operation range





R22 HEAT RECOVERY TYPETECHNICAL PARAMETERS(DOUBLE HEAD)


1413

8

318

312

305

298

401

392

384

376

482

472

461

451

610

598

585

572

730

716

700

685

790

772

755

738

890

872

853

832

253.5

1030

1009

986

965

1102

1080

1056

1033

1264

1239

1211

1185

1382

1354

1324

1295

1550

1520

1485

1452

1795

1763

1720

1683

2088

2047

2000

1960

Model

QWCWF

CoolingWater Inlet temp.

Cooling capacity Power input

Chilled water outlet temp. Chilled water outlet temp. ModelQWCWF



Chilled water outlet temp. Chilled water outlet temp.

R22 ENERGY CORRECTION SINGLE HEAD


1615

9

636

624

610

598

802

784

768

752

964

944

922

902

1111

1080

1055

1033

1220

1196

1170

1144

1345

1318

1289

1261

1460

1432

1400

1370

1580

1552

1510

1476

1675

1640

1604

1570

1765

1730

1690

1654

1917

1879

1837

1797

321.3

545.7

2060

2018

1992

1930

2152

2109

2062

2017

2206

2163

2115

2068

2531

2481

2425

2372

2765

2711

2650

2592

3110

3040

2972

2907

3346

3280

3206

3137

3592

3521

3443

3368

3880

3803

3718

3637

4173

4090

4000

3912

Model

QWCWF



Chilled water outlet temp. Chilled water outlet temp. Model

QWCWF




R22 ENERGY CORRECTION DOUBLE HEAD


1817

10

m3/h

m3/h

m3/h

m3/h





Operation range







Operation range





Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Transport

Operation



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

ChargeS

izeLength

Width

Height

Weight

Transport

Operation



Shell and tube type

Direct start up


R134A BASIC TECHNICAL PARAMETER SINGLE HEAD


2019

11





Operation range


Water outletWater inlet and outlet difference





Operation range





Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Transport

Operation



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

ChargeS

izeLength

Width

Height

Weight

Transport

Operation



Shell and tube type


R134A BASIC TECHNICAL PARAMETER DOUBLE HEAD


21 22

11

m3/h

m3/h

m3/h

m3/h





Operation range







Operation range





Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

Charge

Size

Length

Width

Height

Weight

Transport

Operation



Shell and tube type

Cooling capacity

Power input

Rated current

Power type

Energy control

Com

pressor

Type

Start type

Qty

Oil heater

Evaporator

Type

Water flow

Pressure drop

Pipe

Condenser

Type

Water flow

Pressure drop

Pipe

Refrigerant

Type

ChargeS

ize

Length

Width

Height

Weight

Transport

Operation



Shell and tube type

Model QWCWF

Direct start up Direct start up

Model QWCWF

R134A BASIC TECHNICAL PARAMETER DOUBLE HEAD


23 24

12Model

QWCWF



Chilled water outlet temp. Chilled water outlet temp. ModelQWCWF




R134A BASIC ENERGY CORRECTION


2625

13ModelQWCWF

CoolingWater

Inlet temp.

Cooling capacity Power inputChilled water outlet temp.Chilled water outlet temp. Model

QWCWF

CoolingWater

Inlet temp.

Cooling capacity Power inputChilled water outlet temp.Chilled water outlet temp.

R134A BASIC ENERGY CORRECTION


2827

14

1080B

1100B

1120B

1150B

1180B

1200B

1220B

1255B

1270B

1310B

1340B

1380B

1440B

1510B

A

3100

3100

3100

3000

3650

3650

3550

3600

3600

3700

3750

3750

3700

3800

3750

3750

3800

B

1120

1120

1260

1260

1450

1450

1550

1650

1650

1600

1700

1700

2200

2200

2350

2350

2350

C

1700

1700

1800

1850

2050

2200

2200

2250

2250

2300

2500

2500

2850

2850

2800

2850

2850

D

125

125

125

125

135

135

140

155

155

155

175

175

195

195

175

195

195

E

2580

2580

2580

2580

3080

3080

3080

3080

3080

3080

3080

3080

3080

3080

3080

3080

3080

F

150

150

150

150

150

150

150

200

200

260

230

250

523

523

423

383

383

G

820

820

900

900

950

950

1000

1150

1150

1080

1160

1160

1460

1460

1240

1320

1320

H

466

466

466

466

496

496

496

531

531

531

531

571

611

611

571

611

611

I

586

586

597

599

636.5

636.5

639

639

639

671.5

722.5

722.5

740

745

722.5

740

745

J

185

185

215

260

245

245

300

300

300

305

305

305

350

340

305

350

340

K

225

225

240

270

270

270

300

300

300

345

345

345

758

758

618

618

618

L

495

495

560

530

530

530

550

752.5

728

707.5

737.5

715

747.5

747.5

635

607.5

607.5

M

260

260

260

260

300

300

300

305

305

305

305

350

405

405

350

405

405

DN100

DN100

DN100

DN125

DN125

DN125

DN150

DN150

DN150

DN150

DN200

DN200

DN200

DN200

DN200

DN200

DN200

DN100

DN100

DN125

DN125

DN150

DN150

DN150

DN150

DN150

DN200

DN200

DN200

DN200

DN200

DN200

DN200

DN200

15

172 1400

1550

1550

701.5 647.5

Service distance Service distance

Service distance

Cooling water inlet

Cooling water outlet

Chilled water inlet

Chilled water outlet

Control cabinet

Secondary oil separator

Condenser

Evaporator


ModelQWCWF

Size mm Pipe and size

Evaporator Condenser

ModelQWCWF

Size mm Pipe and sizeEvaporator Condenser

1380B(high)

1440B(high)

1510B(high)

Note:"high"means voltage is 6000V OR10000V Note:"high"means voltage is 6000V OR10000V

high

high

high

high

high

Service distance


Cooling water inlet


Chilled water inlet


Control cabinet


Condenser

Evaporator

Service distanceService distance


R22 BASIC OUTLINE DIMENSIONSSINGLE HEAD

R22 BASIC OUTLINE DIMENSIONSDOUBLE HEAD


3029

16 17

Ser

vice

dis

tanc

e


Cooling water inlet


Chilled water inlet


Control cabinet


Condenser

Evaporator


Service distance

Service distance

Service distance

Cooling water inlet

Cooling water outletChilled water inlet


Control cabinet


Condenser

Evaporator



ModelQWCWF

Size mm Pipe and size

Evaporator CondenserModel

QWCWFSize mm Pipe and size

Evaporator Condenser

Note:"high"means voltage is 6000V OR10000V

high

high

high

high

high

R134A BASIC OUTLINE DIMENSIONSSINGLE HEAD

R134A BASIC OUTLINE DIMENSIONSDOUBLE HEAD


31 32

17

18

19

Service distance

Ser

vice

dis

tanc

e

Service distance

Cooling water inlet

Cooling water outletChilled water inlet


Control cabinet


Condenser

Evaporator

Service distance

Service distance

ModelQWCWF

Size mm Pipe and sizeEvaporator Condenser


Note:"high"means voltage is 6000V OR10000V

highhigh

highhigh

highhigh

highhighhigh

The engine room should have enough space for the installation and maintenance, so that the service people can access the unit without restriction or the components such as the compressor can be easily disassembled and lifted. The engine room should have sufficient space for tube drawing;The engine room should have a sufficient number of well-installed doors that open outward and fire resistance for more than 1 hour( doors should be automatically closed if installed inside the building) to ensure the people can leave freely in an emergency circumstances.The engine room on the ground should have natural ventilation openings. The area of the ventilation openings should be at least 0.14G1/2(m2), which G is the refrigerant filling weight(kg) of the unit installed in the engine room. Naturally ventilated airflow should not be hindered by the surrounding environment.When the engine room locate in a basement, a mechanical ventilation device should be installed. The exhaust volume of the device should be not less than the formula 13.88G(L/S). which G is the refrigerant charging(kg). In order to reduce the non-emergency exhaust capacity, multi-speed fans are recommended. The suction or suction duct of the exhaust fan should be near the unit and properly protected.An emergency stop or power-off switch shall be provided near the engine room. And a switch which control on/off of the mechanically ventilated fan is needed.In addition to the refrigerant filled in the chiller, other materials that are flammable and explosive can not be stored in the engine room. The allowed refrigerant should not exceed 150kg.The design of the engine room should facilitate the discharge, when the safety valve is opened, the refrigerant should be able to be discharged smoothly.The design of the engine room should meet the noise level requirements of the area, and measures should be taken to prevent the transmission of vibration during the unit installation pipes layout.

Do not collide with the ground to causing too much impact force when moving the unit.Avoid damage to refrigerant piping, insulation material and control box during hoisting.Installation platform:1, the construction of the foundation platform must be carefully considered during installation. especially when the machine is installed on the middle or top floor, a shock absorber( see installation diagram 2) should be installed to prevent transmission of noise and vibration. Discuss with designers to ensure that the floor can withstand the operating load of the unit.2, to facilitate the removal of cooling water and chilled water, drains must be provided around the foundation platform;3, foundation platform an unit fixing method can refer to the following example:

Reserved secondary pouring holes




Basic series

Heat recovery series

Single compressor Double compressors

Single compressor Double compressors

COMPUTER ROOMREQUIREMENTS

R134A BASIC OUTLINE DIMENSIONSDOUBLE HEAD



33 34

19

20

●

●

●

●●

21Anchor bolt

Gasket

Cushion plate

Foundation

Unit foot pedestal

Nuts

Shock absorbers

Unit foot pedestal

Nuts

Shock absorbers

Mounting holes

Installation diagram1 Installation diagram 2

Note:1, foundation need reinforced concrete structure;2, please consider the maintenance space of the unit when setting up the foundation;3, basic drainage ditch should be more than or equal to 0.5%, and the angle tens to drain;4, when the foundation needs to be set on the floor, communicate with the architectural designer and set it up on the load-bearing structure;5, the basic drawing is for reference only, please combine the actual construction conditions when making the specific drawings.

The size of the inner diameter of the discharge pipe should be able to meet the safety discharge rate requirements of the container;Drainage pipes should be provided with discharge pipes;The discharge pipe outside the engine room should be able to prevent the entry of rainwater and should be kept away from the air intake of the engine room. There must be no obstacle within one meter of the gas discharge port;If multiple units are installed at the same time, each unit must install its own discharge pipe;The refrigerant is heavier than air, to prevent accidental suffocation, do not vent the refrigerant into the air in the engine room.

Safety valve

Corrugated pipe

Angle valveO

utside engine roomInside engine room

Galvanized steel pipe

1, The power voltage must be stable during the operation. Taking all voltage drop factors into consideration. The unit operating voltage must be maintained within ±10% of the rated value. If the voltage is too high or too low, it will damage the unit.

2, The phase-to-phase voltage difference should not exceed ±2% of the rated value, and the difference between the highest and lowest phase current is less than 3% of the rated value to avoid overheating the compressor.

3, The power frequency should be kept within ±2% of the rated value.4, The minimum starting voltage of the unit must be maintained at more than 85% of the rated value.5, If the power cord is too long, the compressor can’ be started. Therefore, the length of the power cord must

ensure that the voltage difference between the beginning and the tail of the cords voltage is less than rated value of 2% during operation. If the length cannot be shortened, the power cord must be thickened,

6, The wirings must be constructed in strict accordance with the electrical code and regulations, and good insulation. After the unit is connected, the insulation between the terminal and the unit should be measured with a 500V high resistance meter, and the insulation resistance is not less than 5M Ohm.

7, In order to protect the human safety, and avoid a danger of electric shock from leakage of the unit, the unit's casing should have a good an reliable grounding protection device to prevent electric shock accidents. So it should be strictly constructed according to electrical regulations.

8, The wiring uses a three-phase five-wire system and only copper conductors are allowed.9, All field wiring and component installation must be operated by licensed electrician.10, Grounding of the unit must company with local regulations.11, Don't mix low voltage(<30V) and high voltage(> 30 V) control wires in the same wire tube.12, Wire connection must be firm, otherwise it may cause overheating, electric shock or fire etc, but it must not

be too hard on the terminal. Wrap the wire and do not loosen the protective layer and other related parts.13, In order to reduce the hazards of transformers, wiring and other electrical equipment in the event of a short-

circuit accident on the line, and to facilitate the independent control of the start-up and shutdown of each compressor. Each unit's power supply wire must be equipped with a property-capacity no-fuse breaker(NFB) and a separate set of power inlets. Its dynamic wiring is shown in the following diagram. The capacity is selected based on 1.8 times of the rated current value.

14, All compressor adopt star -delta starting (optional soft starter can be selected according to customer requirements)15, The main unit should be equipped with an independent transformer, which rated capacity is calculated

according to the total power input's 1.6-1.8times

n: compressor qty

Userside

ELECTRICAL WIRING


INSTALLATION OFFLOW SWITCH


22INSTALLATION INSTRUCTIONS FOR CHILLED WATER AND COOLING WATER SYSTEM1

35 36

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HOT WATER SYSTEM INSTALLATION INSTRUCTIONS2

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Considering the thermal inertia of water, the amount of water used and the amount of storage, the system must be equipped with a thermal insulation water tank and a circulating water pump so that the stored hot water is always maintained at the required temperature(50-60°C).The water tank must be provided with an insulating layer to reduce heat loss, the volume is designed by the engineering party according to the site, power, the used amount and the user’s requirements.In order to maintain the hot water temperature, the circulating pump must be running for a long time and a auxiliary pump need to be equipped.The hot water system provides ultra-low cost hot water for the user. Its flow and lift are designed according to the requirements, and the pressure is fully controlled for 24 hours. The hot water supply will be determined depending on the unit usage and seasonality. Users should use this system together with a hot water auxiliary system in parallel.For the hot water piping of a heat recovery water cooled screw chiller, refer to the piping diagram shown in reference diagram C.

The poor quality of chilled water and cooling water is not only easy to scaling in the heat transfer tubes, resulting in reduced heat transfer efficiency and attenuation of the unit performance, but also corrosion of the heat transfer tubes causing major unit accidents. The customer should strictly follow the requirements of GB50050-1995”Industrial circulating cooling water treatment design specification” for water quality treatment. Soft water is recommended when the chilled water system is a closed system. During the operation of the unit, the cooling water(including the open system cooing water) shall be sampled and analyzed regularly, and the water quality shall meet the requirements in the following table.If it does not meet the requirements, water treatment should be carried out. Untreated or improperly treated water may cause scale fouling, erosion, corrosion, accumulation of algae or sludge, and in severe cases it may cause the rupture of copper pipes. It is recommended that professional water treatment personnel handle the problem. We does not promise to use improperly treated or untreated water, and does not promise that this series of units can use salt water.In addition, when it is not used for a long time in winter, the water should be drained to prevent the heat exchange tube from freezing and damaging the unit.

Chiller

Bypass

User side

Water tank

(Heat R

etaining)

Supply water

Note: all the water pipes and valves are all supplied from the user

1, softy connection3,11,2, butterfly4, pressure gauge5, temperature gauge6, check valve7, water pump8, drain valve9, Y-filter

C: Domestic hot water piping

1, The inlet and outlet pipes and valves of the unit should be kept at a proper temperature to avoid the loss of refrigeration and condensation.

2, In order to ensure the water side heat exchanger and piping system have enough water, to avoid the high pressure is too high and the internal cold water is frozen under cooling mode. And also avoid the low pressure is too low and the coil return to the system, so the unit chilled water and cooling water outlet shall be provided with a water flow switch and interlocked with the compressor.

3, When two or more heat exchangers are used in parallel with a chiller, the cold water flow must be kept the same to prevent bias current. Therefore, the resistance to reciprocating piping of the chillers to the heat exchangers should be equal. If necessary, balance valve need to be installed.

4, The water piping of the evaporator adopts a closed circuit type, in order to be able to relieve the expansion or contraction of the water volume caused by changes in the water temperature and the influence of the isolated supply water pressure on the water piping, an expansion tank should be installed and its position must be installed at the highest point of the entire water piping, the water level in the expansion tank must be at least 1m higher than the highest point of the water piping.

5, The chilled water pump should be installed on the inlet side of the evaporator.6, To avoid air stuck in the pipe, automatic exhaust air valves should be set on the highest point of the pipes. And horizontal

piping of the water piping system must be constructed upwards at an inclination of 1/250.7, The water piping inlet and outlet should be installed with shockproof hoses to reduce the vibration of the unit through

the water pipe to each room, and the water pipes should be properly fixed. The weight of the water pipes should not be bear by the unit. The water inlet and outlet of the pump should be connected with the corresponding water pipes with shockproof hoses or rubber joints to prevent shock, vibration, noise transmission and mutual interference.

8, The inlet and outlet of the unit should be equipped with thermometers and pressure gauge to facilitate inspection during daily operation.9, when the chiller is in operation, the chilled water flow rate must not be less than 60% of the unit's rated water flow to prevent accidents.10, The chilled water and cooling water inlet and outlet pipe fittings shall be provide with a connection seat so that they can

be easily separated from the water piping in the event of future maintenance.11, For the basic chiller cooling

water piping. Please refer to the piping shown in diagram A. If the unit for the whole years running purpose, it should be equipped with a proportional bypass valve(proportional valve is optional, its control is standard). Refer to the operation manual for details.

12, For the basic chiller chilled water piping, refer to the piping diagram shown in reference diagram B.

Diagram A cooling water pipe

Diagram B Chilled water pipe

Chiller Expansion tank

Water inlet

Water supply

Bypass circuit

water outlet

1, shockproof soft connect 2, flow switch3,11,12, butterfly valve 4, pressure gauge5, thermometer 6, automatic vent valve7, check valve 8, water pump9, drain valve 10, Y-filter

Chiller

Cooling tow

er

Byp

ass

valv

e

1, shockproof soft connect 2,11,12 butterfly valve3, pressure gauge 4, thermometer5, automatic vent valve 6, check valve7, water pump 8, drain valve9, Y-filter 10, flow switch

WATER QUALITYMANAGEMENT

ELECTRICAL CONNECTION


23

37 38

24STANDARD PERFORMANCE PARAMETERS1

STANDARD DELIVERY INSTRUCTIONS2

SPARE PARTS LIST3

If the customer needs, we can provide spare parts as follows: refrigeration oil, dry ball, oil filter, refrigerant

At the time of delivery, the compressors, evaporators, condensers, control cabinets, startup cabinets, throttling valves, and other refrigeration accessories and piping accessories have been assembled as a complete unit;When the unit are delivered, the factory has completed testing; The charging of refrigerant and refrigeration oil has been completed before delivery, and with the water flow switch;We can supply rubber anti-vibration pacts according to the needs of users.

The standard design working condition: chilled water outlet temp.7°C, cooling water inlet temp.30°C; evaporator waterside fouling factor is 0.44(m2.°C/kw), condenser waterside fouling factor is 0.088(m2.°C/kw), refrigerant is R22 or R134a. If you have any other special requirements, please contact with us.

Basic item

sR

eference item

PH valueConductivity

Chloride ionSulfate ion

Acid consumption

Full hardnessIron

Sulfide ion

Ammonium ionsSilica

no found no found

Item Unit Supplemental water Cooling(chilled) water Corrosion Scaling

WATER QUALITY MANAGEMENT

STANDARD SUPPLYDETAILS


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