cooling capacity - carriere).pdf · circuitb no. 111111 evaporator outlet tem. degc .7 flowrate l/s...

01

471~1739kW

Cooling Capacity

Model Number Nomenclature

Legend

Digits 1 to 3: liquid chiller with screw compressors

Digits 4: model series, A water cooled

Digits 5 to 8: model number based on cooling capacity in kW

Digits 10: Voltage

0:400V-3Ph-50Hz(Std)

1:415V-3Ph-50Hz

2:380V-3Ph-50Hz

Digits11: Option equipped

0:No option(Std)

1:Option equipped

Notes:

Digits 10&11 is only for order handling, not shown on ECAT, Chiller nameplate

Digit Number 1 2 3 4 5 6 7 8 9 10 11

Product Code 3 0 X W 0 4 5 2 - 0 0

Unit Operating Range

Cooling/Heating

Evaporator Minimum Maximum

Entering temperature at start-up -

Leaving temperature during operation

Entering/leaving temperature difference at full load

Condenser Minimum Maximum

Entering temperature at start-up -

Leaving temperature during operation

Entering/leaving temperature difference at full load

02

The 30XW liquid chillers are the premium solution for industrial and commercial applications where installers, consultants and building

owners require optimal performances and maximum quality.

-

Premium full load and part load performance

New twin-rotor screw compressor speci cally designed for HFC-134a equipped with a high-ef ciency motor and a variable

capacity valve that permits exact matching of the cooling capacity to the load.

Flooded multi-pipe evaporator and condenser for increased heat exchange ef ciency. The evaporator has a low pressure

drop-which results in reduced cost of water pump.

Electronic expansion device permitting operation at a lower condensing pressure and improved utilization of the evaporator

heat exchange surface (superheat control).

Economizer system with electronic expansion device for increased cooling capacity (30XW-P).

Absolute reliability

Screw compressors

- Industrial-type screw compressors with oversized bearings and motor cooled by

suction gas.

- All compressor components are easily accessible on site mini-

mizing down-time.

- Protection increased by an electronic board.

Refrigerant circuit

- Two independent refrigerant circuits (from

800 kW upwards); the second one au-

tomatically takes over, if the rst one

develops a fault, maintaining partial

cooling under all circumstances.

Evaporator

- E lec t ron ic paddle-f ree f low

switch. Auto-setting according to

cooler size and uid type.

Auto-adaptive control

- Control algorithm prevents exces-

sive compressor cycling (Carrier

patent).

- Automatic compressor unloading in

case of abnormally high condensing pres-

sure.

Exceptional endurance tests

- Partnerships with specialized laboratories and use of

limit simulation tools ( nite element calculation) for the design

of critical components.

- Transport simulation test in the laboratory on a vibrating table and then on an

endurance circuit.

Environmental care

R134a refrigerant

- Refrigerant of the HFC group with zero ozone

depletion potential.

Leak-tight refrigerant circuit

- Reduction of leaks as no capillary tubes and are

connections are used.

- Veri cation of pressure transducers and tempera-

ture sensors without transferring refrigerant charge.

- Discharge line shut-off valve and liquid line service

valve for simpli ed maintenance.

03

Easy and fast installation

Compact design

- The 30XW units are designed to offer the most compact dimensions on the market.

- With a width of approximately 1 m up to 1500 kW the units can pass through standard door openings and only require minimum oor

space in the plant room.

Simpli ed electrical connections

- Main disconnect switch with high trip capacity.

- Transformer to supply the integrated control circuit (400/24 V).

Simpli ed hydronic connections

- Victaulic connections on the evaporator and condenser.

- Practical reference marks for entering and leaving water connections.

- Possibility to reverse the heat exchanger water inlet and outlet at the factory.

Fast commissioning

- Systematic factory operation test before shipment.

- Quick-test function for step-by-step veri cation of the instruments, expansion devices and compressors.

Pro-Dialog control

Pro-Dialog combines intelligence with operating simplicity. The control con-

stantly monitors all machine parameters and precisely manages the opera-

tion of compressors, electronic expansion devices and of the evaporator

water pump for optimum energy ef ciency.

Energy management

- Internal time schedule clock: controls chiller on/off times and opera

tion at a second set-point.

- Set-point reset based on the return water temperature.

- Master/slave control of two chillers operating in parallel with operating

time equalization and automatic change-over in case of a unit fault.

Ease-of-use

- User interface with large touch screen (120 x 99 mm) for intuitive ac-

cess to the operating parameters. The information is in clear text and

can be displayed in local language (please contact your distributor).

Remote management (standard)

The 30XW is equipped with an RS485 serial port that offers multiple remote

control, monitoring and diagnostic possibilities. Carrier offers a vast choice

of control products, specially designed to control, manage and supervise the

operation of an air conditioning system. Please consult your Carrier repre-

sentative for more information.

The 30XW also communicates with other building manage-ment systems via

optional communication gateways.

A connection terminal allows remote control of the 30XW by wired cable:

- Start/stop: opening of this contact will shut down the unit.

- Dual set-point: closing of this contact activates a second set-point (ex-

ample: unoccupied mode).

- Demand limit: closing of this contact limits the maximum chiller capacity

to a prede ned value.

- Operation indication: this volt-free contact indicates that the chiller is op-

erating (cooling load) or that it is ready to operate (no cooling load).

- Alert indication: this volt-free contact indicates the necessity to carry out

a maintenance operation or the presence of a minor fault.

- Alarm indication: this volt-free contact indicates the presence of a major

fault that has led to the shut-down of one or several refrigerant circuits.

04

Model30XW

0452S 0502S 0552S 0 52S 0702S 0802S 0852S 1002S 1052S 1152S 1352S 1452S 1502S 1 2S 1702S

CapacitykW 471 521 539 3 717 773 828 1004 1045 1132 1279 1425 1500 1 40 1709

USRT 134 148 153 189 204 220 235 28 297 322 3 4 405 427 4 48

CompressorCircuit A No. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Circuit B No. 1 1 1 1 1 1 1 1

Evaporator

Outlet tem. degC .7

Flow rate L/s 20 22 23 29 31 33 3 43 45 49 55 1 5 71 74

Water Pressure

dropKpa 31 37 40 3 41 48 50 59 3 54 5 70 77 47 51

Water connection Dg 125 125 125 150 150 150 150 150 150 200 200 200 200 200 200

Fouling factor (sqm-K)/kW 0.018

Condenser

Inlet tem. degC 29.4

Flow rate L/s 25 28 29 3 39 42 45 54 5 1 9 77 81 89 92

Water Pressure

dropKpa 40 47 50 55 3 71 37 49 53 41 59 53 58 52 5

Water connection Dg 125 125 125 150 150 150 200 200 200 200 200 200 200 200 200


MotorPower V-Ph-Hz 380/400/415-3-50

Input power kW 8 99 99 121 130 145 150 185 195 202 221 245 2 3 281 298

Shipping weight(with refrigerant) kg 294 2983 3032 3770 3770 3778 3958 5454 5491 5781 714 7 47 7 4 8838 8853

Operation weight kg 2580 2 17 2 348 348 3493 3711 51 1 5198 5553 995 7549 75 8938 8953

Dimension

Length mm 274 274 274 305 305 305 2780 4008 4008 4008 4 95 4 95 4 95 47 0 47 0

Width mm 970 970 970 1119 1119 1119 1085 1050 1050 1050 1188 1231 1231 19 5 19 5

Height mm 1 93 1 93 1 93 1849 1849 1849 1900 184 184 189 20 4 20 4 20 4 1537 1537

Model30XW

0502P 0552P 0702P 0802P 0852P 1002P 1152P 1352P 1452P 1 02P 1752P

CapacitykW 505 572 730 784 852 1029 1147 130 1488 1 14 1739

USRT 144 1 3 207 223 242 293 32 371 423 459 495

CompressorCircuit A No. 1 1 1 1 1 1 1 1 1 1 1

Circuit B No. 1 1 1 1 1 1

Evaporator

Outlet tem. degC .7

Flow rate L/s 22 25 31 34 37 44 49 5 4 9 75

Water Pressure

dropKpa 22 28 2 29 34 38 4 30 38 44 51

Water connection Dg 150 150 200 200 200 200 200 200 250 250 250


Condenser

Inlet tem. degC 29.4

Flow rate L/s 27 31 39 42 4 5 2 71 80 87 94

Water Pressure

dropKpa 35 43 3 41 47 30 3 3 31 37 43

Water connection Dg 150 150 200 200 200 200 200 250 250 250 250


MotorPower V-Ph-Hz 380/400/415-3-50

Input power kW 85 9 121 134 144 173 193 213 242 2 2 283

Shipping weight(with refrigerant) kg 3275 3312 4331 4349 4379 74 749 8995 10848 10848 10848

Operation weight kg 29 3 3025 4155 4173 4204 09 84 8945 10948 10948 10948

Dimension

Length mm 3055 3055 328 328 328 4 94 4 94 4783 4809 4809 4809

Width mm 1008 1008 1135 1135 1135 1070 1070 1985 21 0 21 0 21 0

Height mm 1743 1743 1949 1949 1949 1998 1998 1531 158 158 158

. .kW

Technical Data

Dimensions

05

Note:

1. Required clearances for maintenance,

Recommended space for tube removal (clearance 2 0 and 1000 can be either on the right or the left side).

2. Pi and Pi are two group of bolts to x the chiller, either group can be selected.

3. The water pipe connector is the Victaulic coupling. The Victaulic and the pipe are supplied with the chiller, the pipe length is 120mm.

30XW0452S～30XW0552S

Model A B C D E S R

30XW0452S/0502S 272 251 320 189 1 93 Dg125 Dg125

30XW0552S 272 251 320 189 1700 Dg125 Dg125

Model P1 P2 P3 P4 P1’ P2’ P3’ P4’ PT

30XW0452S 744 809 492 535 738 815 488 539 2580

30XW0502S 852 473 758 531

30XW0552S 780 891 530 902 458 537

Weight Distribution (kg)

06

Note:





30XW0652S～30XW0802S


1173 1050 597 1185 1037 590

30XW0702S 1173 1050 597 1185 1037 590

30XW0802S 1175 1052 598 1187 1039 591 3493


600

E

DC

BA

100

111

9

500

700

958

80

808

75

80

75

2501200

S

R

3056

2660

1000120

Detail A

Chiller

Pipe

Sealing

GasketVictaulic Coupling

Coupling Pipe

(Welded with the

customer pipe)

689

P1 P1’ P3 P3’

P2 P2’ P4 P4’

889 H

1119

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

2 2

Dimensions

Model A B C D H E S R

30XW0 52S 220 304 303 284 528 1849 Dg150 Dg150

30XW0702S/0802S 220 304 303 284 582 1849 Dg150 Dg150

07

Note:





30XW0852S

A B C D E S R

230 340 310 284 1900 Dg150 Dg200


30XW0852S 1097 1238 730 1089 735 3711


08

Note:





30XW1002S～30XW1152S

Model A B C D E S R

30XW1002S/1052S 284 311 340 230 184 Dg150 Dg200

30XW1152S 290 333 340 230 189 Dg200 Dg200


30XW1002S 1491 1208 1102 1508 1343 1222 1088

30XW1052S 1498 1381 1207 1113 1513 1219 1100 5198

30XW1152S 1283 1221 1572 1477 1291 1213 5553


Dimensions

60

0

E

DC

BA

10

0

10

50

50

07

00

96

71

42

76

7

42

125

2502239

S

R

4008

3860

1000

689

P1 P1’ P3 P3’

P2P2’ P4P4’

846

577

1050

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

2

2

Circuit A Circuit B

120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

09

Note:





30XW1352S

A B C D E S R

340 359 340 255 20 4 Dg200 Dg200


30XW1352S 2098 1980 1501 2111 1510 1407


120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

60

0

E

AB

CD

10

0

1188

50

0

70

0

11

08

40

908

14

0

250125

2585

S

R

4695

4560

1000

689

P1 P1’ P3 P3’

P2 P2’ P4 P4’

1013

655

1188

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

2 2

Circuit A Circuit B

10

Note:





30XW1452S～30XW1502S


30XW1452S 1979 2243 1559 1952 2271 1537 1789 7549

30XW1502S 1983 2247 1773 2275 1541 1794


Dimensions

A B C D E S R

340 359 340 255 20 4 Dg200 Dg200

120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

60

0

E

AB

CD

10

0

12

31

50

0

70

0

11

51

40

95

11

00

250

125

2585

S

R

4695

4560

1000

689

P1 P1’ P3 P3’

P2 P2’ P4 P4’

698

1231

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

22

Circuit A Circuit B

11

Note:





30XW1662S~30XW1702S

A B C D E S R

340 391 350 334 1537 Dg200 Dg200


2391 2772 1748 2027 2794 1732 2043 8938

30XW1702S 2395 2777 1751 2030 2373 2799 1735 2047 8953


120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

600

E

CD

AB

100

1965

500

700

1885

40

1685

140

40

140

250

1745

SR

4760

4560

1000

689

P1 P1ʼ P3 P3ʼ

P2 P2ʼ P4 P4ʼ

1461 450 450 346

1965

629

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

2

2

Circuit A Circuit B

12

Note:





30XW0502P～30XW0552P


30XW0502P 891 885 592 892 884 591

30XW0552P 952 552 558 951 552 559 3025


Dimensions

A B C D E S R

242 299 304 222 1743 Dg150 Dg150

120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

13

Note:





30XW0702P～30XW0852P

Model A B C D E F G S R

30XW0702P 230 340 333 290 1949 50 328 Dg200 Dg200

30XW0802P 230 340 333 290 1949 50 328 Dg200 Dg200

30XW0852P 230 340 333 290 1949 801 3288 Dg200 Dg200


30XW0702P 1491 1758 490 1478 1771 412 494 4155

30XW0802P 1498 418 492 1484 1779 414 4173

30XW0852P 1454 1791 433 1437 1809 428 530 4204


120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

600

E

DC

BA

100

11

35

500

700

1085

25

985

75

220

1600

S

R

G

3160

1000

689

P1 P1’ P3 P3’

P2 P2’ P4 P4’

F599

1135

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

22

14

Note:





30XW1002P～30XW1152P


30XW1002P 1590 1998 1339

30XW1152P 1987 1580 1381 2019 1704 1355


Dimensions

A B C D E S R

340 359 340 255 1998 Dg200 Dg200

120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

15

Note:





30XW1352P

A B C D E S R

340 391 350 334 1531 Dg200 Dg250


30XW1352P 2719 1758 1774 2721 1757 1775 8945


16

Note:





30XW1452P～30XW1752P

Dimensions

120

Detail A

Chiller

Pipe

Sealing


Coupling Pipe

(Welded with the

customer pipe)

60

0

E

DC

BA

10

0

21

60

50

07

00

208

04

0

1880

14

0

40

14

0

2501745

SR

4809

4560

1000

689

P1 P1’ P3 P3’

P2 P2’ P4 P4’

1484

Connection Guide

See Detail A

Water Outlet,

Cooler

Water Inlet,

Cooler

Water Outlet,

Condenser

Water Inlet,

Condenser

1

1

1

22

Circuit A Circuit B 473 473 437

2160

767

Model A B C D E S R

30XW1452P 380 347 428 349 158 Dg250 Dg250

380 347 428 349 158 Dg250 Dg250


30XW1452P 3010 2317 2445 3001 3185 2310 2452 10948

3010 2317 2445 3001 3185 2310 2452 10948

30XW1752P 3010 2317 2445 3001 3185 2310 2452 10948


17

Foundation

ModelDimension (mm)

A B C P Q R

30XW0452S 704 920 75 970

30XW0502S 704 920 75 970

30XW0552S 704 920 75 970

1200 889 958 80 1119

30XW0702S 1200 889 958 80 1119

30XW0802S 1200 889 958 75 1119

30XW0852S 1200 751 2780 1035 75 1085

30XW1002S 2239 844 4008 100 1050

30XW1052S 2239 844 4008 100 1050

30XW1152S 2239 4008 100 1050

30XW1352S 2585 1013 1108 100 1188

30XW1452S 2585 1013 1151 100 1231

30XW1502S 2585 1013 1151 100 1231

1745 100

30XW1702S 1745 100

30XW0502P 1200 889 3055 958 75 1008

30XW0552P 1200 889 3055 958 75 1008

30XW0702P 1085 75 1135

30XW0802P 1085 75 1135

30XW0852P 1085 75 1135

30XW1002P 2585 1013 990 100 1070

30XW1152P 2585 1013 990 100 1070

30XW1352P 1745 1471 4783 1905 100 1985

30XW1452P 1745 1484 4809 2080 100

1745 1484 4809 2080 100

30XW1752P 1745 1484 4809 2080 100

18

Options

Options NO Description Advantages Use

Medium Brine 5temperature

application such

as ice storage

and industrial

processes

30XW1152S

30XW0502P

30XW0552P

30XW1002P

Low Brine

temperature

application such

as ice storage

and industrial

processes

30XW1152S

30XW0502P

to compressor motor electrical characteristics

30XW0552P

30XW1002P

Single power

connection81

This option is required to allow to connect on

single power supply line to one single location

where std machine require two

Quick and easy

installation

30XW1002S-1702S

30XW1002P-1752P

Evaporator &

Condenser water 104

Reinforced evaporator & condenser for extension

of the maximum water-side service pressure to

Covers applications

with a high water

column(high

buildings)

30XW0452S-1702S

30XW0502P-1752P

Evaporator &

Condenser water

pressue 2.1MPa

Reinforced evaporator & condenser for extension

of the maximum water-side service pressure to

2.1MPa

Covers applications

with a high water

column(high

buildings)

30XW0452S-1702S

30XW0502P-1752P

Evaporator with

reversed water

connection

107E Evaporator with reversed water inlet/outletwater piping

30XW0452S-1702S

30XW0502P-1752P

Condenser with

reversed water

connection

107C Condenser with reversed water inlet/outletwater piping

30XW0452S-1702S

30XW0502P-1752P

CCN to J bus

gateway148B

Two way protocol converter board between CCN

and J-Bus for easy connection to BMS. Easy connection

by communication

bus to a building

management

system

30XW0452S-1702S

Consist of:

-Electronic board mounted in the unit electrical

cabinet 30XW0502P-1752P

CCN to BAC Net/

Modbus gateway148C


and BAC Net/Modbus for easy connection to

BMS.Easy connection

by communication

bus to a building

management

system

30XW0452S-1702S

Consist of:



CCN to Lon work

gateway148D


and Lon walk for easy connection to BMS. Easy connection

by communication

bus to a building

management

system

30XW0452S-1702S

Consist of:



High condensing

temperature

unit (up to

leaving

condenser water

temperature)

150

Increased condenser leaving water temperature

.Allows applications

with high

condensing

temperature(for

heat reclaim or dry

cooler applications)

30XW0452S-0552S

30XW1002S-1152S

30XW0502P-0552P

to compressor motor electrical characteristics30XW1002P-1152P


Heat pump Max

condenser leaving 150A

Heat pump control logic to control condenser

LWT

Allows heating

applications with

max condenser

30XW0452S-0552S

30XW1002S-1152S

to compressor motor electrical characteristics30XW0502P-0552P

30XW1002P-1152P

Condenser

maxium leaving

temperature

limited to 45

150Bmaximum condenser leaving temperature

Avoids oversizing

of the protection

elements and the

power cables

30XW0452S-1702S

30XW0502P-1752P

Heat pump Max

condenser leaving

temp 50

150D

Heat pump control logic to control condenser

LWT Allows heating

applications with

max condenser

leaving temp 50

30XW0452S-1702S

30XW0502P-1752P

Condenser water

valve control

(0-10V signal)

152

Output signal (0-10V) to control the condenser

water inlet valve

Used for

applications with

cold water at the

condenser inlet

(well water). In

this case the

valve controls the

water entering

temperature to

maintain an

acceptable

condensing

pressure

30XW0452S-1702SConsist of:

- One 8DO+4AI/2AO Board

- Connector for 3 way valve

30XW0502P-1752PNote: Power supply for water valve is not

included

Energy

management

module

Remote control module. Additional contacts for

an extension of the unit control functions (without

communication bus)

Easy connection by

wired connection

to a building

management

system

30XW0452S-1702S

Consist of:

30XW0502P-1752P- Electrinoc board mounted in the unit electrical

cabniet

Evaporator

connections

314E Victaulic to Flange water connections Easy installation30XW0452S-1702S

30XW0502P-1752P

Condenser

connections

314C Victaulic to Flange water connections Easy installation30XW0452S-1702S

30XW0502P-1752P

Nitrogen charge 320 Unit nitrogen factory charged.Less weight. No

refrigerant charged

30XW0452S-1702S

30XW0502P-1752P

Australia code 312AMeets Australia government pressure vessel

code AS 1210 and AS 4343

Meets Australia

government

pressure vessel

code AS 1210 and

AS 4343

30XW0452S-1702S

30XW0502P-1752P

Multi-piece

shipment51

"Side-by-side" Units only. Unit shipped in

connections, no refrigerant charge (Nitrogen

holding charge)

Easy installation

30XW1352P-1752P

Low noise 257

Provide 2 to 4 dBA sound attenuation vs std to

meet low noise applicationLower operating

sound levels

30XW0452S-1702S

30XW0502P-1752P

19


Super low noise 258meet super low noise application Lower operating

sound levels

30XW0452S-1702S

30XW0502P-1752P

Super low noise 258Ameet super low noise application

Lower operating

sound levels with

waterproof

30XW0452S-1702S

30XW0502P-1752P

Super low noise 258B

Provide 8 to 10 dBA sound attenuation vs std to

meet super low noise application Lower operating

sound levels

30XW0452S-1702S

30XW0502P-1752P

20

Options

Notes:

2. Compatibility: Medium brine option PT005 is not compatible with PT150/PT150A/PT312A.

3. PT150A only suitable for 30XW0452/0502/0552/1002/1052/1152/0502P/0552P/1002P/1152P

4. Condenser water valve control option is not include 3 way valve and power supply for water valve.

2.5

mm

2M

AX

.

0-1

0V

DC

24

VA

C-4

8V

DC

MA

X

20

V-M

IN

1.5

mm

2M

AX

1.5

mm

2M

AX

.

24

VA

C-3

0V

AM

AX

1.5

mm

2M

AX

.

ALARM

ALERT

READY

REMOTE ON / OFF SWITCH

SET POINT SWITCH

DEMAND LIMIT SWITCH

WATER PUMP FEEDBACK

PUMP 1 COMMAND

PUMP 2 COMMAND

CNN CONNECTOR

80mA MIN-3A MAX

80mA MIN-3A MAX

80mA MIN-3A MAX

30A

31A

30B

31B

30B

31B

32

33

5

3

4

71

72

73

74

0.5A MAX

0.5A MAX

J3CH24

+C

CH11

+C

CH12

+CCH13

+C

CH14

+C

+C

CH10

CCNJ12CN

GND

+

A1

24

VA

C,2

0m

ACH25

+C

CH2

+C

J8

J5

J2

CH18

+C

CH19

-

CH20

-

Wiring Diagram

21

General description

Factory assembled single piece water-cooled liquid chiller. Contained within the unit shall be all factory wiring,

piping, controls, refrigerant charge (HFC-134a), refrigeration circuits set, screw compressors, electronic expan-

Quality assurance

1. Unit construction shall comply with standard including the following:

A. Code of design of heating, ventilation and air conditions (GBJ 19-87, GB50019-2003)

B. GB/T 18430.1-2007, ARI Standard 550/590-2003

ISO 9001 and environmental management system ISO 14001

3. Unit shall be run tested at the factory.

4. Unit components shall be capable of withstanding 60°C storage without damage, failure, refrigerant

loss, or safety risks.

Product features

1. Compressors:

A. Unit shall have semi-hermetic twin-screw compressors with internal relief valve and check valve to avoid

reverse rotation on shut down.

B. Each compressor shall be equipped with a discharge shut-off valve.

D. Capacity control shall be provided by a variable control slide valve capable of reducing compressor capacity

down to 15% of full load. Compressor shall start in unloaded condition.

E. Motor shall be cooled by suction gas and protected by internal winding temperature sensors. Compressor

bearings shall be designed for minimum 73000 hours at maximum operating conditions.

2. Evaporator:

A. Unit shall be equipped with a single evaporator.

B. Evaporator shall be manufactured, tested and stamped in accordance with the GB150-1998.

C. The maximum refrigerant-side operating pressure will be 2100 kPa, and the maximum waterside pressure

D. The evaporator shall be mechanically cleanable, shell-and-tube type with removable heads. Tubes shall

be internally and externally grooved, seamless-copper, and shall be rolled into tube sheets. Shell shall be

insulated with 19 mm closed-cell foam with a maximum K factor of 0.28. Evaporator thermal insulation

E. The evaporator shall have a drain and vent in each head.

F. The evaporator shall incorporate an active refrigerant level control system to ensure optimum heat transfer

performance under all load conditions.

G. Design shall incorporate either 1 or 2 independent refrigerant circuits

22

H. Chiller shall have only one water inlet & outlet connection with victaulic couplings to avoid vibrations trans-

mission and accept small misalignment (water connection kit on demand).

pressure switches shall not be acceptable.

3. Condenser:

A. Unit shall be equipped with a single condenser.

B. Condenser shall be manufactured, tested and stamped in accordance with the GB150-1998.

C. The maximum refrigerant-side operating pressure will be 2100 kPa, and the maximum waterside pressure

D. The condenser shall be mechanically cleanable shell-and-tube type with removable heads.

E. Tubes shall be internally and externally grooved, seamless-copper, and shall be rolled into tube sheets.

F. Design shall incorporate either 1 or 2 independent refrigerant circuits and the oil separator.

G. The condenser shall have a drain and vent in each head.

H. Chiller shall have only one water inlet & outlet connection with victaulic couplings to avoid vibrations trans-

mission and accept small misalignment (water connection kit on demand).

4. Refrigeration circuits:

A. Refrigerant circuit components shall include, compressor, oil separator, high and low side pressure relief

indicating sight glasses, long stroke electronic expansion device, and complete operating charge of both

refrigerant HFC-134a and compressor oil.

B. To facilitate service and maintenance and avoid refrigerant charge transfers, it must be possible to isolate

-

pressor (with service valves option).

5. Controls:

A. Unit controls shall include as a minimum: microprocessor with non-volatile memory, picture guided unit/

operator interface, the LOCAL/OFF/REMOTE/CCN selector and a touch-screen display with with multiple

language capability.

B. Pressure sensors shall be installed to measure suction, discharge, and oil pressure.

C. Thermistors shall be installed to measure cooler entering and leaving temperatures (on cooler and con-

denser side).

D. Unit shall be capable of performing the following functions:

- Automatic change-over and cycling of compressors to equalize running hours and number of starts.

- EXV control, based on throttling optimizes evaporator charging, ensuring condenser superheat and sub-

cooling.

23

minute to prevent excessive demand spikes at start-up.

- Enable reset of leaving chilled water temperature according to the return water temperature or by means

of a 0-10V signal.

- Provide a dual set point for the leaving chilled water temperature activated by a remote contact closure

signal or by the built in time clock.

- Enable a 2-level demand limit control (between 0 and 100%) or a maximum current drawn limit activat

edby a remote contact closure or by the built in time clock.

- Control evaporator water pump and the condenser pump.

- Allow two time scheduling programs to enable unit start-up control, demand limit and set-point changes.

- Enable lead lag control of two chillers running in series or parallel.

6. Diagnostics:

A. Display module shall be capable of displaying set points, system status including temperatures, pressures,

current for each compressor, run time and percent loading.

B. The control system shall allow a quick test of all machine elements to verify the correct operation of every

switch, circuit breaker, contactor etc. before the chiller is started.

7. Safeties:

A. Unit shall be equipped with all necessary components, and in conjunction with the control system shall

provide the unit with protection against the following:

- Reverse rotation.

- Low chilled water temperature.

- Low oil pressure (per compressor).

- Current imbalance.

- Compressor thermal overload

- Automatic compressor unloading in case of excessive condensing temperature

- High pressure.

- Electrical overload.

- Loss of phase.

B. Control shall provide separate general alert (minor incident) and alarm (circuit down) remote indication.

8. Operating characteristics:

9. Electrical characteristics:

A. Unit shall operate on 3-phase power supply without neutral.

B. Control voltage shall be supplied by a factory-installed transformer.

C. Unit shall be supplied with factory-installed electrical disconnect/isolator switch integrating main fuses.

D. Unit shall have a factory installed star/delta starter as standard to limit electrical inrush current.

cooling capacity - carriere).pdf · circuitb no. 111111 evaporator outlet tem. degc .7 flowrate l/s...

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