water cooled packaged unit - acson international · the mcquay “scroll” mwcp water-cooled...

Water Cooled Packaged UnitModels: MWCP18A MWCP115A MWCP30A MWCP125A MWCP35A MWCP135A MWCP55A MWCP145A MWCP70A MWCP165A MWCP75A MWCP205A MWCP85A MWCP100A

Technical Manual MWCP-2007

�

Nomenclature...............................................................................................................................2

Features........................................................................................................................................2

Specification.................................................................................................................................3

Sound.Data....................................................................................................................................9

Performance.Data.......................................................................................................................17

Dimensional.Data.......................................................................................................................32

Electrical.Data.............................................................................................................................37

Wiring.Diagrams.........................................................................................................................42..

Refrigerant.Circuit.Diagram......................................................................................................50.

Troubleshooting.........................................................................................................................54

Exploded.View.and.Parts.List...................................................................................................55

Contents

Note:.Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment.

Caution:.Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

Warning:.Moving machinery and electrical power hazard may cause severe personal injury or death. Disconnect and lock off power before servicing equipment.

“McQuay” is a registered trademark of McQuay International. All rights reserved throughout the world.

© 2007 McQuay International

Bulletin illustrations cover the general appearance of McQuay International products at the time of

publication and we reserve the right to make changes in design and construction at any time without notice.

2

FeaturesThe McQuay “SCROLL” MWCP water-cooled packaged units are designed for duct type air-conditioning system in commercial and industrial application. An optional plenum is available for MWCP18A-MWCP70A, for free standing applications. The MWCP water-cooled packaged unit has single or multiple hermetic compressors with independent refrigerant circuits. Each refrigerant circuit consists of a high efficiency condenser, a sealed strainer, and capillary tubes. Every McQuay MWCP unit has been leak tested, evacuated and fully charged with refrigerant R22 at the factory.

High Efficiency Hermetic Compliant Scroll Compressor• Quiet operation. • Unmatched reliability with 70% fewer moving parts than comparably sized reciprocating compressors.• Greater capability at handling liquid and debris in the system.• High efficiency performance.

Enhanced.Copper.Tubes.Condenser.Extra-high efficiency is attained by special designed shell-and-tube condenser with “T” groove copper tube surfaces for superior refrigerant-water heat transfer.

Anti-Corrosion.Unit.CasingUnit casing is constructed of electro-galvanized steel sheet. Casing surface is finished with epoxy polyester powder coating. Therefore, units are suitable for both commercial and industrial application.

Whisper-.Quiet.OperationEach unit is divided into separate compartments such that compressor noise is kept away from the supply air stream. Internal insulation of 1/2 inch thick fiberglass and double blowers design further reduce noise level.

Quality AssuranceEach unit is leak-tested, evacuated, fully charged with refrigerant and run tested in McQuay’s ISO9001 certified factory.

Nomenclature

Capacity

Water-Cooled Packaged

Brand: McQuay

Power Source �80-415V/�N/50Hz

Description

Export

Design Series

M WCP 18 A F EAA

�

MODE MWCP18A MWCP30A MWCP35A MWCP55A MWCP70A MWCP75A

NOMINAL CAPACITYBtu/h 58100 88800 119600 181000 240000 270910

W 17000 26000 �5000 5�000 70200 79400

NOMINAL TOTAL INPUT POWER kW 4.�4 (4.16) 7.10 (7.10) 9.70 (9.00) 14.29 (1�.49) 16.70 (15.90) 22.00

ELECTRICAL HEATER W 6000 9000 12000 21000 27000 �6000

POWER SOURCE V/Ph/Hz �80-415/�/50

REFRIGERANT TYPE R22

AIR FLOWl/s / cfm

800/1695 1167/2470 1916/4058 2250/4765 �000/6�5� �778/8000

EXTERNAL STATIC PRESSUREPa /

in.wg80 (0)/0.� (0)

100 (0)/0.4 (0) 150 (0)/0.5 (0) 200/0.8

SOUND PRESSURE LEVEL dBA 52 6� 65 67 70 72

UNIT DIMENSION

LENGTH mm/in 1078/42 1078/42 1278/150 1722/68 1922/76 1962/77

WIDTH mm/in 647/25 647/25 677/27 7�6/29 8�6/�� 1060/42

HEIGHT mm/in1789 (2058)/

70 (81)1789 (2058)/

70 (81) 1902 (2172)/

75 (86)1921 (2195)/

76 (86)20�5 (2404)/

80 (95)1961/77

PACKING DIMENSION

LENGTH mm/in 1190/47 1190/47 1�90/55 1810/71 20�8/80 2050/81

WIDTH mm/in 816/�2 816/�2 845/�� 850/�� 990/�9 1265/50

HEIGHT mm/in 2020/80 2020/80 2115/8� 2160/85 2290/90 221�/87

UNIT WEIGHT kg/lb205 (220)/451 (484)

2�5 (250)/517 (550)

280 (�00)/616 (660)

455 (485)/1001 (1067)

610 (650)/1�42 (14�0)

720/1584

CONDENSATE DRAIN SIZE mm/in 25.4/1 25.4/1 25.4/1 25.4/1 25.4/1 25.4/1

WATER PIPECONNECTION

TYPE Female Thread

SIZE mm/in �1.75/1.25 �1.75/1.25 �1.75/1.25 50.80/2.00 50.80/2.00 50.80/2.00

REFRIGERANT CHARGE kg/lb 1.45/�.2 2.50/5.5 �.10/6.8 5.00/11.0 7.40/16.2 8.60/19.0

SpecificationsGeneral Data

NOTES:1. ALLSPECIFICATIONSARESUBJECTEDTOCHANGEBYTHEMANUFACTURERWITHOUTPRIORNOTICE.2. NOMINALCOOLINGANDHEATINGCAPACITYAREBASEDONTHECONDITIONSBELOW:COOLING-27°CDB/19°CWB

INDOORAND30°C/35°CENTEMNG/LEAVINGWATER.TEMPERATURE.3. SOUNDPRESSURELEVELAREACCORDINGTOJISB8615STANDARD.POSITIONOFTHEMEASUREMENTPOINTIS1mIN

FRONTAND1mBELOWTHEUNIT.4. DATAINTHEBRACKETISFORTHEMODELWITHPLENUMBOX.

4

General Data

MODE MWCP85A MWCP100A MWCP115A MWCP125A

NOMINAL CAPACITYBtu/h 297400 �24200 �9�160 4�4690

W 87000 95000 115000 127400

NOMINAL TOTAL INPUT POWER kW 23.5 2�.90 �2.50 �4.50

ELECTRICAL HEATER W �6000 - 48000 48000



AIR FLOW l/s / cfm �778/8000 4722/10000 5500/11647 6111/12941

EXTERNAL STATIC PRESSURE Pa / in.wg 200/0.8 250/1.0 250/1.0 �00/1.2

SOUND PRESSURE LEVEL dBA 72 74 75 76

UNIT DIMENSION

LENGTH mm/in 1962/77 1962/77 2182/86 2182/86

WIDTH mm/in 1060/42 1060/42 124�/49 124�/49

HEIGHT mm/in 1961/77 1961/77 2040/80 2040/80

PACKING DIMENSION

LENGTH mm/in 2050/81 2050/81 2�04/ 91 2�04/91

WIDTH mm/in 1265/50 1265/50 14�5/56 14�5/56

HEIGHT mm/in 221�/87 221�/87 2227/88 2227/88

UNIT WEIGHT kg/lb 800/1760 9�0/2046 1010/2222 10�0/2266

CONDENSATE DRAIN SIZE mm/in 25.4/1


TYPE Female Thread

SIZE mm/in 50.8/2.00 6�.5/2.50 6�.5/2.50 6�.5/2.50

REFRIGERANT CHARGE kg/lb 7.50/18.0 12.70/27.9 1�.20/29.1 1�.50/29.7

NOTES:1. ALLSPECIFICATIONSARESUBJECTEDTOCHANGEBYTHEMANUFACTURERWITHOUTPRIORNOTICE.2. NOMINALCOOLINGANDHEATINGCAPACITYAREBASEDONTHECONDITIONSBELOW:COOLING-27°CDB/19°CWBIN-

DOORAND30°C/35°CENTEMNG/LEAVINGWATER.TEMPERATURE.3. SOUNDPRESSURELEVELAREACCORDINGTOJISB8615STANDARD.POSITIONOFTHEMEASUREMENTPOINTIS1mIN


5

General Data

MODE MWCP135A MWCP145A MWCP165A MWCP205A

NOMINAL CAPACITYBtu/h 443690 491470 525600 679180

W 130000 144000 154000 199000

NOMINAL TOTAL INPUT POWER kW �2.20 �4.50 �9.20 47.80

ELECTRICAL HEATER W 48000 48000 60000 60000



AIR FLOW l/s / cfm 68��/14470 68��/14470 7��/15529 9167/19412

EXTERNAL STATIC PRESSURE Pa / in.wg �00/1.18 �00/1.18 �50/1.�8 �50/1.�8

SOUND PRESSURE LEVEL dBA 76 77 77 79

UNIT DIMENSION

LENGTH mm/in 2�82/86 2�82/86 2�82/94 �012/119

WIDTH mm/in 124�/49 124�/49 124�/49 15�4/60

HEIGHT mm/in 2040/80 2040/80 2040/80 208�/82

PACKING DIMENSION

LENGTH mm/in 2550/100 2550/100 2550/100 �510/1�8

WIDTH mm/in 1454/57 1454/57 1454/57 1625/64

HEIGHT mm/in 2262/89 2262/89 2262/89 2225/88

UNIT WEIGHT kg/lb 1225/2695 12�5/2717 1250/2750 1400/�081

CONDENSATE DRAIN SIZE mm/in 25.4/1 25.4/1 25.4/1 25.4/1


TYPE Female Thread

SIZE mm/in 6�.5/2.50 76.2/�.00 76.2/�.00 76.2/�.00

REFRIGERANT CHARGE kg/lb 16.90/�7.1 17.60/�8.6 20.00/44.0 4�.00/94.6

NOTES:1. ALLSPECIFICATIONSARESUBJECTEDTOCHANGEBYTHEMANUFACTURERWITHOUTPRIORNOTICE.2. NOMINALCOOLINGANDHEATINGCAPACITYAREBASEDONTHECONDITIONSBELOW:COOLING-27°CDB/19°CWBIN-

DOORAND30°C/35°CENTEMNG/LEAVINGWATER.TEMPERATURE.3. SOUNDPRESSURELEVELAREACCORDINGTOJISB8615STANDARD.POSITIONOFTHEMEASUREMENTPOINTIS1mIN


�

Components Data

NOTE:ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.

MODEL MWCP18A MWCP30A MWCP35A MWCP55A MWCP70A

FAN

TYPE DOUBLE INLET CENTRIFUGAL

QUANTITY 1

MATERIAL GI

DRIVE Belt Drive

DIAMETER mm/in 228/9 254/10 305/12 381/15 381/15

MOTOR

TYPE Squirrel Cage Induction

QUANTITY 1

INDEX OF PROTECTION (IP) IP54

COMPRESSORTYPE Scroll

OIL TYPE Mineral oil

EVAPORATOR COIL

TUBE

MATERIAL Copper

DIAMETER mm/in 9.52/0.375

THICKNESS mm/in 0.35/0.014

FIN

MATERIAL Aluminum


FACE AREA m2/ft2 0.51/ 0.02 0.�3/0.03 0.78/0.03 1.17/12.�4 1.35/14.58

ROW 3

FIN PER INCH 12

CONDENSER

TYPE TUBE IN TUBE SHELL AND TUBE

WATER FLOW m³/h 3.4 5.5 8.5 11 12.�

PRESSURE DROP Kpa 35 37 38 40 42

WATER PIPE SIZE in R1-1/4" R2"

AIR QUALITY FILTER

TYPE Nylon

QUANTITY pc 1

SIZE

LENGTH mm/in825/

32.48825/

32.481025/40.35

14��/57.72

1�5�/�5.20

WIDTH mm/in5�5/

22.24754/29.�9

775/30.51

725/28.54

825/32.48

THICKNESS mm/in 8/0.315

CASINGMATERIAL EG

COLOUR Light Grey(RALF032)

7

Components Data



FAN


QUANTITY 1

MATERIAL GI

DRIVE Belt Drive

DIAMETER mm/in 381/15 381/15 381/15 457/18 457/18

MOTOR


QUANTITY 1




EVAPORATOR COIL

TUBE

MATERIAL Copper



FIN

MATERIAL Aluminum


FACE AREA m2/ft2 2.05/22.14 2.05/22.14 2.05/22.14 2.3�/25.49 2.3�/25.49

ROW 3

FIN PER INCH 12

CONDENSER

TYPE SHELL AND TUBE

WATER FLOW m³/h 13.8 15 19 23 25.1

PRESSURE DROP Kpa 43 38 20 45 4�

WATER PIPE SIZE in R2" R2-1/2R2"

AIR QUALITY FILTER

TYPE Nylon

QUANTITY pc �

SIZE

LENGTH mm/in529/

20.83529/

20.83529/

20.83593/

23.35593/

23.35

WIDTH mm/in��0/

25.98��0/

25.98��0/

25.98�8�/

27.00�8�/

27.00


CASINGMATERIAL EG

COLOUR Light Grey (RALF032)

8

Components Data

MODEL MWCP135A MWCP145A MWCP165A MWCP205A

FAN


QUANTITY 1

MATERIAL GI

DRIVE Belt Drive

DIAMETER mm/in 457/18 457/18 457/18 559/22

MOTOR


QUANTITY 1 1 1 2




EVAPORATOR COIL

TUBE

MATERIAL Copper



FIN

MATERIAL Aluminum


FACE AREA m2/ft2 2.�3/28.40 2.�3/28.40 2.�3/28.40 3.47/37.45

ROW 3

FIN PER INCH 12

CONDENSER

TYPE SHELL AND TUBE

WATER FLOW m³/h 25.3 28 29.3 39

PRESSURE DROP Kpa 35 55 �0 115

WATER PIPE SIZE in R2-1/2R2" R3"

AIR QUALITY FILTER

TYPE Nylon

QUANTITY pc � � � 8

SIZE

LENGTH mm/in ��1/2� ��1/2� ��1/2� �29/25

WIDTH mm/in �8�/27 �8�/27 �8�/27 �73/2�


CASINGMATERIAL EG

COLOUR Light Grey (RALF032)

MODEL MWCP18A~70A MWCP75A~205A

SAFETYDEVICE

HIGH PRESSURE SWITCH

TYPE Auto Reset Cartridge

OPEN MPa/psi 2.8/40�0 2.0�/299

CLOSE MPa/psi 2.3/3335 1.5�/22�

LOW PRESSURE SWITCH

TYPE Auto Reset Cartridge

OPEN MPa/psi 0.15/21.75

CLOSE MPa/psi 0.05/7.25

PHASE PROTECTION Phase sequencer

Safety Devices


9

Outdoor.Units1/1 Octave Sound Pressure Level (dB,ref 20μPa)

Overall.A(dBA)

Noise.Criteria

63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz

MWCP18A �2.0 41.0 42.0 44.0 45.4 42.5 �5.0 �0.0 52.0 44.5

MWCP30A 44.0 5�.0 54.0 56.5 58.0 54.0 50.5 47.5 6�.0 57.0

MWCP35A 42.0 56.0 56.0 59.0 60.0 57.0 51.0 48.0 65.0 58.�

MWCP55A 50.0 57.0 59.0 61.5 61.5 58.0 54.5 51.5 67.0 61.9

MWCP70A 47.0 57.0 6�.0 64.0 67.0 64.0 56.0 47.0 70.0 66.0

MWCP75A 49.0 60.0 6�.0 66.0 67.0 64.0 59.0 55.0 72.0 66.6

MWCP85A 49.0 6�.0 65.0 66.0 67.0 6�.0 58.0 55.0 72.0 66.6

MWCP100A 51.0 6�.0 67.0 68.0 71.0 68.0 60.0 51.0 74.0 70.8

MWCP115A 58.0 64.0 65.0 69.0 69.0 67.5 62.5 59.5 75.0 68.1

MWCP125A 56.0 6�.0 65.0 70.0 70.0 67.0 6�.0 60.0 75.0 68.5

MWCP135A 5�.0 67.0 67.0 70.0 71.0 68.0 62.0 59.0 76.0 71.0

MWCP145A 60.0 67.0 67.0 71.5 71.5 68.0 64.5 61.5 77.0 71.7

MWCP165A 54.0 64.0 70.0 71.0 74.0 71.0 6�.0 54.0 77.0 71.5

MWCP205A 56.0 70.0 70.0 7�.0 74.0 71.0 65.0 62.0 79.0 72.�

Sound Data

Sound Pressure Level

Model Measuring.location

�m

�m

�m

45

H

(H+

1)/

2

microphone

microphone

microphone

microphone

microphone

Standard: JIS B 8616-1999

MWCP18A MWCP115AMWCP30A MWCP125AMWCP35A MWCP135AMWCP55A MWCP145A..MWCP70A MWCP165AMWCP75A MWCP205AMWCP85A..MWCP100A.

�0

Octave-band frequency (Hz)

6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP18A/30A.NC.CURVE

MWCP�0A

MWCP18A

NC Curves


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP35A.NC.CURVE

MWCP�5A

��


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP55A.NC.CURVE

MWCP55A


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP70A.NC.CURVE

MWCP70A

�2


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP75A.NC.CURVE

MWCP75A


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP85A.NC.CURVE

MWCP85A

1�


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP100A.NC.CURVE

MWCP100A


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP115A.NC.CURVE

MWCP115A

14


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP125A.NC.CURVE

MWCP125A


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP135A.NC.CURVE

MWCP1�5A

15


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP145A.NC.CURVE

MWCP145A


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP165A.NC.CURVE

MWCP165A

�6


6� 125 250 500 �000 2000 4000 80000

�0

20

�0

40

50

60

70

80

90

Sou

nd p

ress

ure

leve

l (dB

,ref

20

MP

a)

NC15

NC20

NC25

NC�0

NC�5

NC40

NC45

NC50

NC55

NC60

NC65

NC70

MWCP205A.NC.CURVE

MWCP205A

17

Operating.Range

Performance Data

Wate

r E

nte

ring T

em

p. (°

C)

Indoor Temp. (°CWB)

20

15 2419.4

30

35

STD

18

MO

DE

L

AIR

.ON

.EV

AP

OR

AT

OR

WA

TE

R.T

EM

PE

RA

TU

RE

.OF

F.C

ON

DE

NS

ER

21ºC

35ºC

40ºC

NO

MIN

AL

.AIR

.F

LO

W.m

3 /h

DB

.TE

MP

.(ºC

).W

B.T

EM

P.(

ºC).

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

MW

CP

18A

2880

2� 27 �2

15 19 2�

15.4

216

.99

18.�

2

9.82

11.4

91�

.08

�.46

�.56

�.66

14.5

�16

.00

17.5

9

9.58

11.1

212

.96

4.24

4.�4

4.45

14.2

515

.61

17.5

7

9.66

11.1

81�

.28

4.56

4.71

4.8�

MW

CP

�0A

4200

2� 27 �2

15 19 2�

2�.1

�25

.48

27.4

8

14.9

017

.�5

19.8

1

5.71

5.87

6.02

21.7

924

.00

26.�

9

14.2

716

.70

19.4

8

6.94

7.10

7.28

21.�

72�

.42

26.�

6

14.�

416

.89

20.0

6

7.45

7.69

7.88

MW

CP

�5A

5400

2� 27 �2

15 19 2�

�0.8

4��

.97

�6.6

�

20.�

922

.69

25.9

7

9.4�

10.1

610

.79

29.0

5�2

.00

�5.1

8

18.9

422

.02

25.5

4

9.01

9.70

10.4

5

28.4

9�1

.22

�5.1

4

19.1

222

.29

26.�

2

8.88

9.52

10.4

4

MW

CP

55A

8100

2� 27 �2

15 19 2�

47.2

�52

.02

56.1

0

�1.4

6�6

.7�

41.7

9

11.6

711

.97

12.2

7

44.4

949

.00

5�.8

7

�0.6

1�5

.57

41.2

6

1�.9

910

.29

14.6

�

4�.6

�47

.81

5�.8

1

�0.9

8�6

.00

42.6

2

14.9

515

.40

15.7

6

MW

CP

70A

1080

02� 27 �2

15 19 2�

62.6

569

.01

74.4

1

40.6

047

.�4

54.2

4

15.5

215

.92

16.�

1

59.0

165

.00

71.4

6

�9.0

645

.70

5�.0

9

18.6

019

.00

19.4

5

57.8

86�

.42

71.�

8

�9.7

145

.85

54.2

5

19.8

820

.47

20.9

5

MW

CP

75A

1�60

02� 27 �2

15 19 2�

70.8

578

.0�

84.1

4

47.6

155

.�2

6�.0

2

17.8

218

.�0

18.7

7

66.7

�7�

.50

80.8

1

46.1

85�

.58

62.0

6

21.5

222

.00

22.5

4

65.4

571

.71

80.7

2

46.7

�54

.00

64.0

9

2�.0

52�

.77

24.�

4

MW

CP

85A

1�60

02� 27 �2

15 19 2�

79.0

487

.06

9�.8

8

5�.1

161

.7�

70.�

2

18.9

719

.49

20.0

0

74.4

582

.00

90.1

5

51.5

259

.78

69.2

4

22.9

82�

.50

24.0

9

7�.0

280

.00

90.0

5

52.1

460

.24

71.5

0

24.6

425

.41

26.0

4

MW

CP

100A

1700

02� 27 �2

15 19 2�

91.7

510

0.55

108.

0�

62.�

968

.�7

7�.4

6

19.2

219

.77

20.2

7

86.7

195

.00

10�.

95

58.9

664

.60

70.6

9

2�.�

52�

.90

24.5

0

85.1

492

.81

10�.

84

57.8

96�

.11

70.6

1

25.1

025

.81

26.5

�

Per

form

ance

.Tab

les

19

MO

DE

L

AIR

.ON

.EV

AP

OR

AT

OR

WA

TE

R.T

EM

PE

RA

TU

RE

.OF

F.C

ON

DE

NS

ER

21ºC

35ºC

40ºC

NO

MIN

AL

.AIR

.F

LO

W.m

3 /h

DB

.TE

MP

.(ºC

).W

B.T

EM

P.(

ºC).

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

TO

TAL

.C

AP

AC

ITY

.(k

W)

SE

NS

IBL

E.

CA

PA

CIT

Y.

(kW

)

INP

UT

.(k

W)

MW

CP

115A

1980

02� 27 �2

15 19 2�

106.

0�11

6.78

125.

9�

69.6

681

.05

92.5

6

26.2

�26

.95

27.6

6

99.8

711

0.00

120.

9�

67.1

178

.�2

91.1

8

�1.7

9�2

.50

��.�

2

97.9

510

7.�2

120.

80

68.�

778

.99

9�.8

6

�4.0

8�5

.15

�6.0

2

MW

CP

125A

2200

02� 27 �2

15 19 2�

11�.

7412

5.28

1�5.

09

74.8

487

.45

100.

51

28.2

�28

.95

29.6

6

107.

1�11

8.00

129.

7�

72.5

�84

.�7

97.9

5

��.7

9�4

.50

�5.�

2

105.

0811

5.1�

129.

58

7�.2

484

.85

100.

42

�6.0

8�7

.15

�8.0

2

MW

CP

1�5A

2200

02� 27 �2

15 19 2�

122.

561�

4.58

144.

81

8�.�

491

.51

98.4

7

25.8

926

.6�

27.�

1

115.

6712

7.10

1�9.

2�

78.6

686

.�7

94.6

8

�1.1

6�2

.20

��.0

1

11�.

5�12

4.01

1�9.

08

77.2

084

.��

94.5

7

��.8

1�4

.74

�5.7

4

MW

CP

145A

2460

02� 27 �2

15 19 2�

1�8.

5115

�.�7

166.

01

94.1

910

4.29

112.

89

27.7

428

.5�

29.2

6

1�0.

0014

4.00

159.

00

88.4

097

.92

108.

12

��.7

1�4

.50

�5.�

6

129.

�514

0.�0

158.

92

87.9

695

.40

108.

07

�6.2

��7

.26

�8.�

0

MW

CP

165A

2640

02� 27 �2

15 19 2�

148.

5116

�.�7

176.

01

100.

9911

1.09

119.

69

�1.5

2�2

.42

��.2

4

140.

0015

4.00

169.

11

95.2

010

4.72

114.

99

�8.�

0�9

.20

40.1

8

1�7.

�515

0.�0

168.

92

9�.4

010

2.20

114.

87

41.1

642

.�4

4�.5

1

MW

CP

205A

��00

02� 27 �2

15 19 2�

192.

�621

0.�5

225.

65

1�0.

8014

�.04

15�.

44

�8.1

��9

.5�

40.5

�

182.

0619

9.00

217.

29

12�.

801�

5.�2

147.

76

46.7

047

.80

49.0

0

178.

8519

4.52

217.

06

121.

621�

2.27

147.

60

50.1

951

.62

5�.0

6

Per

form

ance

.Tab

les

20

FIG.4 - ALIGNMENT AND BELT TENSION

FIELD SUPPLIED STRAIGHTEDGE

FOUR POINT METHOD

A B C D

Belt.Adjustment

Drive Alignment

Fan Performance Curves

Supply Air Blower AdjustmentThe RPM of the supply air blower will depend on the required CFM, the unit accessories and the static resistance of both the supply and the return air duct system. With this information, the RPM for the supply air blower can be determined from the fan performance curves.Knowing the required blower RPM and the blower motor HP, the supply air motor pulley can be determined.After the supply air blower motor is operating, adjust the resistance in both the supply and the return duct systems to balance the air distribution throughout the conditioned space.

To determine the deflection force required use the formula: Deflection = Belt Span/64

CAUTION:.. 1. Do not over tighten the belts or the bearings may be come damaged. The best tension for a belt drive is the lowest tension at which the belts will not slip under the highest required load. 2. The belts should be checked at a certain time in case too loose.

Table.5-Belt.Tensioning.Information

SUPER.GRIPBELTS

Belt.Cross.SectionSmall.P.D..Range.

(mm)

Deflection Force (N)

Min. Max

SPZ56~95

100~1401�20

2025

SPA80~1�2

140~20025�5

�545

SPB112~2242�6~�15

4565

6585

2�

Panel.ChecksA. Verify � phases power to unit.B. Close unit disconnect and verify that crankcase heaters are energized. Allow the heater to remain on a minimum

of 24 hours before attempting startup. This is important to assure no refrigerant is in the oil startup. Fail to do this could cause compressor failure.

Initial.StartupAfter the operator has familiarized itself with the sequence of operation for the unit and all options provided, the unit can be put in operation. Proceed as follows.1. Energize cooling tower water pump and tower fans.2. Turn the fan switch to the ON position.�. The “Sequence of Operation” instruction covered is shown in the control wiring diagrams.4. If no unusual noise or adverse conditions exist allow the unit to run. If these conditions do exist, turn off the unit

and investigate cause.Take an air flow measurement in the straight duct off the unit discharge using a pitot tube. This measurement should be taken about three quarters (�/4) of the way down the straight duct off the fan, just before any transition or elbow. If a condition of low or high air flow exists, a pulley change may be required.Once it is ascertained that the air quantity leaving the unit is at the design, the thermostats should be set to the desired space temperature. The system should now function as designed.

22

VELOCITY PRESSURE - PA

MODEL.:.MWCP.18A

MODEL.:.MWCP30A


2�

MODEL.:.MWCP35A

MODEL.:.MWCP55A/75A/85A/100A(MWCP75A/85A/85A use.Double.Blowers)



24

MODEL:MWCP70A/115A/125A/135A/145A/165A(MWCP115A/125A/135A/145A/165A.use.Double.Blowers)

MODEL:.MWCP205A



25

Water.Flow.Rate/Pressure.Drop.Chart

0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

0 2 4 6 8 �0 �2 14 �6 18 20 22 24 26

Water Flow (m�/h)

Water.Flow.Rate/Pressure.Drop.Chart.(MWCP18A)

Pre

ssur

e D

rop

(KP

a)


0

�0

20

�0

40

50

60

70

80

90

�00

2 2.5 � �.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 �0

Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

26


0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

0 � 2 � 4 5 6 7 8 9 �0 �� 2 1� 14 15


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

1�0

140

150

0 2 4 6 8 �0 �2 14 �6 18 20 22


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

27


0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

1�0

0 2 4 6 8 �0 �2 14 �6 18 20 22 24


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

0 2 4 6 8 10 �2 �4 16 �8 20 22 24


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

28


0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

0 2 4 6 8 �0 �2 14 �6 18 20 22 24 26


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

0

5

�0

15

20

25

�0

�5

40

45

50

2 4 6 8 �0 �2 14 �6 18 20 22 24 26 28 �0


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

29



0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

140

150

�60

0 5 �0 15 20 25 �0 �5 40 45

Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a) 1�0

Pre

ssur

e D

rop

(KP

a)

0 5 �0 15 20 25 �0 �5 40 45


Water Flow (m�/h)

0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

1�0

140

�0


0

�0

20

�0

40

50

60

70

80

90

�00

��0

�20

0 5 �0 15 20 25 �0 �5 40 45


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

0

20

40

60

80

�00

�20

140

�60

180

0 5 �0 15 20 25 �0 �5 40 45 50


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

�1


0

40

80

�20

�60

200

240

280

0 5 �0 15 20 25 �0 �5 40 45 50 55 60 65


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

0

50

�00

150

200

250

�00

�50

0 5 �0 15 20 25 �0 �5 40 45 50 55 60 65 70


Water Flow (m�/h)

Pre

ssur

e D

rop

(KP

a)

�2

1�

EMERGENCY DRAIN 1"

CABLE ENTRY 2"

CONDENSATE DRAIN 1"

WATER INLET �/ "

TIME

SAVEREG

ON/OFF

TEMP UP

DOWNTEMP

COOL AUTO

COMPMODE

COMP�

COMP�

COMP2

HEAT

W-PUMP

RESET

FAN

� I� n� t� e� r� n� a� t� i� o� n� a� l

PLENUM

�4

WATER OUTLET �/ "4�

574

�5

69 180 �4�

677

85

60

�260

1278

85

�2

44 56� 4

�4�

286

�48 400 448

1902

670

1196

�00

4- 1�

A

WATER INLET 1 "

WATER OUTLET 1 "

4�

4�

EMERGENCY DRAIN 1"

CABLE ENTRY 2"

CONDENSATE DRAIN 1"

PLENUM

MODEL A B C D E

MWCP18A �47 �0� �47 �10 264

MWCP�0A 285 ��6 �75 284 291

B C

ED

5�6

�82

�0 60

66

81

647217

1078�060 5��

85

44

�2

640

996

�00

1789

Dimensional Data

INSTALLATIONCLEARANCES

FRONT: 900REAR: 600LEFT: 900RIGHT: 900

Dimensions in mm

MODEL.:.MWCP18A/30A



Dimensions in mm

MODEL.:.MWCP35A

��

WATER INLET 2"

WATER OUTLET 2" CABLE ENTER 2"

EMERGENCY DRAIN 1"

CONDENSATE DRAIN 1"

PLENUM

SAVEREG

� I� n� t� e� r� n� a� t� i� o� n� a� l

MODETEMP DOWNUP

TEMP

COMP2

COMP�

RESETCOMP

TIME

HEAT

COOL

FANCOMP�

W-PUMPAUTO

ON/OFF

609

25�

��0 119

8�6600

425 90 1902

1922

20�5

�00

28 7�0

4�

4 1�

828

1848�9

6

644 560 644

484

�10

WATER OUTLET 2"

WATER INLET 2" CABLE ENTER 2"

EMERGENCY DRAIN 1"

PLENUM

CONDENASATE RRAIN 1"

� I� n� t� e� r� n� a� t� i� o� n� a� l

586 475 586

406

272

728

1647

�00

6�0

64

98 180

7�6

�72 90

165

17021722

1921

4�

94

45 6004 1�



Dimensions in mm

MODEL.:.MWCP55A



Dimensions in mm

MODEL.:.MWCP70A

�4

4

79�898

CABLE ENTRY 2"

WATER OUTLET N

WATER INLET N

MODEL

MWCP100A Rc2 1/2

N(DIMENSION)

CONDENSATE DRAIN 1"

CONDENSATE DRAIN 1"

AIR FILTER COOLING COIL

50�

269

��0

42

998

5445�5

50

10�

2�2

1962

1880 15

1961

471�84471 290290

1878

127

5�5

�060

�62�

1�67

TEMP DOWNUPTEMP RESETCOMP

W-PUMP

FAN

COMP2

COMP�

COMP1

AUTO

MODE

HEAT

COOL

TIME

ON/OFF

EG SAVER

R

SYS.� SYS.2 SYS.�

LOW HIGH LOW HIGH LOW HIGH



Dimensions in mm

MODEL.:.MWCP75A/85A



Dimensions in mm

MODEL.:.MWCP100A

MWCP95/�05A

MWCP75A/85A

EMERGENCY DRAIN 1"

MODEL

CONDENSATE DRAIN �"

CABLE ENTRY 2"

WATER OUTLET N

WATER INLET N

N (DIMENSION)

2-1/2"2"

AIR FILTER COOLING COIL

50�

��0

269 42

5�5544

79�898998

�0�

50

2�2

1880

1962

�62�

1�67

290 471 �84 471 290

�27

5�5

�060

1878

196�

�5

EMERGENCY DRAIN 1"

CABLE ENTRY 2"

CONDENSATE DRAIN 1"

WATER OUTLET 2 / "

COOLING COIL AIR FILTER

� 2

WATER INLET 2 / "2�

SAVEREG

� I� n� t� e� r� n� a� t� i� o� n� a� l

COMPUP

TEMP MODETEMP DOWN

HEAT

COOL

RESET

TIME

FAN

COMP2

COMP�

COMP�

W-PUMPAUTO

ON/OFF

��8

520

264

40

177

74628

726964

1080

1180

50

2�00

2182

1814

2040

1424

124�

659

178

2089

27� 557 458 557 27�



Dimensions in mm

MODEL.:.MWCP115A/125A



Dimensions in mm

MODEL.:.MWCP135A/145A/165A

MWCP145A/165A

MWCP1�5A Rc2 1/2

Rc �

N(SIZE)

� I� n� t� e� r� n� a� t� i� o� n� a� l

R

MODEL

WATER OUTLET N

WATER INLET N

CABLE ENTRY 2"

CONDENSATE DRAIN 2"

CONDENSATE DRAIN 2"

COOLING COIL AIR FILTER

520

��8

264 40

628726

96410801180

177

74

50

�7� 557 458 557 �7�

2040

2289

178

659

124�

1424

2014

4 152�002�82

�6

� I� n� t� e� r� n� a� t� i� o� n� a� l

WATER INLET Rc�

WATE OUTLET Rc�

CABLE ENTRY 2"

CONDENSATE DRAIN Rc1

CONDENATE DRAIN R1

AIR FILTER COOL ING COIL

1�57

��8

268 �26

4��

852

1�06

174

50.8

684 694 614 694 �26

5569

7

15�4

208�

2952.4

�012



Dimensions in mm

MODEL.:.MWCP205A

37


MOTOR

INSULATION GRADE IP54

POWER SOURCE V/Ph/Hz 380-415/3/50

RATED INPUT POWER W 4000 4000 5500 5500 7500

RATED RUNNING CURRENT A 8.82 8.82 11.80 11.80 15.60

MOTOR OUTPUT W 3360 3360 4675 4675 6525

POLES 4

COMPRESSOR

INSULATION GRADE E


CAPACITOR mF -

RATED OUTPUT POWER kW 18.00 19.50 24.68 21.00 24.68

RATED RUNNING CURRENT A 44.2 50 45 52.2 45

LOCKED ROTOR AMP. A 125 167 159 167 159

Electrical Data


MOTOR



RATED INPUT POWER W 550 1100 2200 3000 4000


MOTOR OUTPUT W 390 825 1760 2460 3360

POLES 4

COMPRESSOR

INSULATION GRADE E


CAPACITOR mF -

RATED OUTPUT POWER kW 3.79 6.00 7.50 11.29 15.00


LOCKED ROTOR AMP. A 66 95 125 125 125

NOTES:ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.

38

Electrical Data

MODEL MWCP135A MWCP145A MWCP165A MWCP205A

MOTOR



RATED INPUT POWER W 7500 11000 11000 15000

RATED RUNNING CURRENT A 15.60 22.30 22.30 31.20

MOTOR OUTPUT W 6525 9680 9680 13050

POLES 4

COMPRESSOR

INSULATION GRADE E


CAPACITOR mF -

RATED OUTPUT POWER kW 34.80 31.48 36.00 45.00

RATED RUNNING CURRENT A 62.4 76.3 88.4 110.5

LOCKED ROTOR AMP. A 159 125 125 125

NOTES:ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.

�9

Operation.Instruction. .

McQuay water-cooled packaged units are offering a high intelligent control system A.. AFTER.INSTRLLATION.BUT.PRIOR.TO.START.UP

1) Visually check power wiring for size and type. It must meet all local codes and N.E.C. codes.2) Verify that field wiring matches the �-phase power requirements of the unit. See caution on schematic diagram

in the control panel. �) Check the unit visually for indication of leaks in the refrigerant circuit. 4) Check the drive alignment of the pulleys using the four points method prior to adjusting belt tension (see page

2� for alignment and belt tension). 5) Check the fan wheel position in the scroll, by rotating the fan manually. If any rubbing occurs, make necessary

corrections. 6) Install all panels on the air side of the unit after internal unit inspection is completed. 7) Be sure all sensors are installed in the ductwork (supply and return) and in the cooling water lines. 8) Check to see that all piping such as cooling water and drains are completed and tested. The steam and drain

traps must be installed.9) Verify that water pumps (cooling) function properly and that proper flows have been set.10) Are recommended pressure taps and temperature wells installed for trouble shooting, if required.11) Be sure cooling tower fans are wired correctly and fans are turning in the right direction.

B.. FUNCTION.INSTRUCTION1) Features:

Operation Mode: COOL/HEAT/FAN/COOL&HEAT,Room temperature setting, ranging from 16ºC~�0ºC.TIMER On/Off setting, ranging from 0~24hoursEnergy saver function (EG-SAVER).Alarm functionLED display indicates the states of the unit.

2) Control panel operation instruction:

C.. OPERATION�) Finish checking all the items (after installation but prior to start up).2) Press MODE button to select the operation mode.�) If required, press TIMER button to preset time.4) Press ON/OFF button to start up the unit.

In Cool Mode, the start sequence is, switch ON → Water pump on → 50s → Fan on → �0s → Comp on → �min → Next comp on → �min → Next comp onIn Fan Mode, switch ON → Fan On.

5) When the unit runs, you can press TEMP button or EG-SAVER button, so that the temperature indoor is according to your requirement.

6) Shut off the unit. In Cool Mode, the start sequence is, switch OFF → 7S → Comp OFF → 2S → Next Comp OFF → 2S → Next Comp OFF → 7S → Fan OFF → MIN → Water pump OFF

40

7.2 Once an alarm occurs, LED will display the error code, meanwhile, the alarm output switch will be close. When there are more than one error, the LED will display their error codes one by one per second.

7.� When the trouble is settled, the system still maintains the state of error. Only after pressing the key RESET, the system will resume to work

7.4 When there is an Alarm, press key RESET, it will release the Alarm for service. Press the key RESET one more time, the system will check the Alarm signal again, if the trouble is still there, the system will alarm again, but temperature sensor fault and no feedback fault will reset automatically

8) Cool and Fan Mode can be selected before unit startup and related indicate lamp will light up. After unit startup, the lamp of ON/OFF will light up, and then, other indicate lamps will light up when its equipment is running.

9) The control system with networking can connect up to �2unit via RS-485 communication port. The unit address can be set via On or Off of KEY2.1—KEY2.5. In one networking system, there is no same unit address for different units. Our factory can provide the open communication protocol, please contact the factory if needed.

Error.Code Error.Description Error.Code Error.Description

L1 Comp 1 Low pressure E7 Water pump overload

H1 Comp 1 High pressure L8 Shortage of water flow

L2 Comp 2 Low pressure H9 Electric heater overload

H2 Comp 2 High pressure E0 Return air sensor fault

L3 Comp � Low pressure E5 Leaving water sensor fault

H3 Comp � High pressure E1 Coil 1 sensor fault

L4 Comp 4 Low pressure E2 Coil 2 sensor fault

H4 Comp 4 High pressure E3 Coil � sensor fault

H5 Comp 1 Overload E4 Coil 4 sensor fault

H6 Comp 2 Overload E6 Leaving water temp is too high

H7 Comp � Overload L9 Leaving water temp is too Low

H8 Comp 4 Overload L0 No feedback signal

H0 Fan motor overload E9 Communication fault

E7 Water pump overload E8 Memorizer fault

7) Error Code and Troubleshooting: 7.1 Error Code:

MODEPressing this button will advance the modeCOOL HEAT FAN COOL&HEAT

Auxiliary Electric HeaterIf the unti has auxiliary electric heater,press this key is to switch on/off the electric heater.

LED DisplayEnergy Save

In cool or heat mode, press the key

EG-SAVER to enter the energy safe condition,

and the LED will light up. If cool mode,

the set temp that system accepts, is 1 degC

higher than the temp LED displays. If heat

mode, the set temp that system accepts, is

1 degC lower tht the temp LED displays.

Reset

Main Power ON/OFF

E-HEAT

International

COMP3

COMP1

COMP2

COMP4

TEMP UP TEMP DOWN MODE

HEAT

COOL

RESET

TIMER

EGSAVER

FAN

W-PUMP

ON/OFF

TimerTimer range is from 0-24 hours.time, TIMERlamp light means the sytem is in timer operation. When the unit is in ON mode,it will turn off after time's up and it willquit timer operation.hen the unit is in OFF mode,it will turn on after time's up and itwill quit timer operation.

Press or to set the desired temp ranging

Temp. setting

from 16°C~30°C.

41

Key2.5 Key2.4 Key2.3 Key2.2

OFF OFF OFF OFF

OFF OFF OFF OFF

OFF OFF OFF ON

OFF OFF OFF ON

OFF OFF ON OFF

OFF OFF ON OFF

OFF OFF ON ON

OFF OFF ON ON

OFF ON OFF OFF

OFF ON OFF OFF

OFF ON OFF ON

OFF ON OFF ON

OFF ON ON OFF

OFF ON ON OFF

OFF ON ON ON

OFF ON ON ON

ON OFF OFF OFF

ON OFF OFF OFF

ON OFF OFF ON

ON OFF OFF ON

ON OFF ON OFF

ON OFF ON OFF

ON OFF ON ON

ON OFF ON ON

ON ON OFF OFF

ON ON OFF OFF

ON ON OFF ON

ON ON OFF ON

ON ON ON OFF

ON ON ON OFF

ON ON ON ON

ON ON ON ON

NOTE:THEDIPSWITCHKEY1.1、KEY1.2、KEY1.3ANDKEY2.6HAVEBEENSETREADYBEFOREEX-FACTORY,PLEASEDONOTCHANGETHESETTING,ORTHEUNITMAYNOTBERUNNING.

Unit.Address.Table:.

42

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50

Refrigerant Circuit Diagrams

COMPRESSOR

COOLING CAP. TUBE

WATER INLET

COIL

FAN MOTORCHENCKJOINT

LP

CHENCKJOINT

HP

WATER OUTLET

TUBE IN TUBE

PG PG


MODEL.:.MWCP55A

COMPRESSOR 2

COOLING CAP. TUBE

COMPRESSOR �

COOLING CAP. TUBE

WATER INLET

LP1

CHENCKJOINT

COIL

FAN MOTORCHENCKJOINT CHENCK

JOINT

LP1

CHENCKJOINT

TUBE IN TUBE 1

WATER OUTLET

TUBE IN TUBE 2

HP1

PG

HP2

PGPG

PG

51

MODEL.:.MWCP70A

MODEL.:.MWCP75A/85A

EVAPORATOR SYS.2

gas back

COMPRESSOR SYS.2COMPRESSOR SYS.1gas back

exhaustexhaustliquid out

liquid out

CONDENSER SYS.� CONDENSER SYS.2

wind out

capillary

capillary

EVAPORATOR SYS.�

wind back

wind back

COMPRESSOR SYS.2COMPRESSOR SYS.�gas back

wind back

wind back

EVAPORATOR SYS.�

capillary

capillary

wind out

wind out

CONDENSER SYS.2CONDENSER SYS.�

liquid out

liquid outexhaust exhaust

gas back

EVAPORATOR SYS.2

52



gas back

gas back

COMPRESSOR SYS.1gas back

EVAPORATOR SYS.�

EVAPORATOR SYS.�

wind back

CONDENSER SYS.�

capillaryliquid out

exhaust

CONDENSER SYS.2 CONDENSER SYS.�

EVAPORATOR SYS.2

COMPRESSOR SYS.2 COMPRESSOR SYS.�

exhaust exhaust

liquid out

liquid out

capillary

capillary

wind back

wind backwind out

wind out

gas back

gas back

gas back

gas back

EVAPORATOR SYS.4

EVAPORATOR SYS.2

EVAPORATOR SYS.�

COMPRESSOR SYS.1 COMPRESSOR SYS.2 COMPRESSOR SYS.� COMPRESSOR SYS.4

CONDENSER SYS.� CONDENSER SYS.2 CONDENSER SYS.�

exhaust exhaust exhaustliquid out

liquid out

liquid outcapillary

capillary

capillary

wind back

wind back

wind back

EVAPORATOR SYS.1

wind out

wind out

CONDENSER SYS.4

liquid out

exhaust

5�

MODEL.:.MWCP205A

COMPRESSOR SYS.1gas back

gas back

gas back

gas back

COMPRESSOR SYS.4COMPRESSOR SYS.2 COMPRESSOR SYS.�

CONDENSER SYS.�

EVAPORATOR SYS.2

capillary

capillary

wind back

wind back

EVAPORATOR SYS.�

EVAPORATOR SYS.4

wind out

liquid out

liquid out

liquid out

liquid out

capillary

wind back

EVAPORATOR SYS.�

wind out

exhaust

CONDENSER SYS.4

exhaust exhaust

CONDENSER SYS.2 CONDENSER SYS.�

exhaust

COMPRESSOR SYS.5

gas back

EVAPORATOR SYS.5 liquid out

exhaust

CONDENSER SYS.5

54

Troubleshooting

PROBLEM POSSIBLE.CAUSE ACTION

Lack of Cooling Effect

1. Faulty compressor or lack of compression.2. Temperature of air entering evaporator too high. �. Fouled condenser tube surface.4. Low refrigerant charge.5. Improper air flow through evaporator.6. Eoom thermostat not operating properly.

1. Check discharge pressure forcompression. Inspect compressor and replace if necessary.

2. Reduce load to design kW value.�. Inspect surfaces and clean.4. Repair refrigerant leak, add refrigerant.5. Determine flow and adjust correctly belt tension.6. Inspect thermostat and replace if necessary.

Tripping of Compressor(s)

A. Due to Low Pressure Cut-out

1. Reduced air flow through evaporator.2. Low refrigerant charge.�. Restricted refrigerant line.4. Faulty low-pressure cut-out or improper setting.

1. Inspect surface & clean, check evaporator fa drive. 2. Repair refrigerant leak, add refrigerant.�. Determine the cause of restriction and repair.4. Readjust or replace.

B. Due to High Pressure Cut-out

1. Air in refrigerant system.2. Excess refrigerant charge.�. Faulty high-pressure cut-out or improper setting.

1. Re-evacuate refrigerant system and charge with new refrigerant.

2. Bleed off excess refrigerant.�. Readjust or replace.

C. Due to Compressor Overload Protector tripping

1. Compressor over-current, under voltage or single phasing.

2. Excessive discharge pressure.�. Compressor over-heating due to low refrigerant. 4. Compressor motor has a winding shorted.5. Liquid refrigerant in Compressor causing valve plate

damage and lack of compression.

6. Defective overload protector.

1. Check electrcal supply, contractors, wires and rectify fault.

2. See section B above.�. Check refrigerant charge (fix leak), add if necess-

ary. 4. Replace compressor.5. Check that crankcase heater is functioning porperly. 6. Replace portector.

Excessive belt “Scream” when fans start up.

1. Slipping belts. 1. Apply “Grako Sprazon” belt dressing.

NOTE:THISCONDITIONSERVICEWHICHSHOULDBEATTEMPTEDONLBYQUALIFIEDSERVICEPERSONNEL.CONTACTYOURNEARESTMCQUAYSERVICEREPRESENTATIVE.

55

7

9

8

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4

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18

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14

Exploded view & Part list

SPARE.PART.LIST.OF.MWCP18A

Part not in diagram

A02189008219 PRESSURE GAUGE �

M0�084702507 FILTER, 825*585*8*15mm �

No. Part.Number. Description Quantity

� M01014700474 FRONT PANEL BOTTOM �

2 M0101470045� FRONT PANEL MIDDLE �

� M01014700452 TOP PANEL FRONT �

4 M01014700602 REPAIR PANEL �

5 M01014700448 SIDE PANEL LEFT �

6 M010147005�� TOP PANEL �

7 M01014700459 PANEL TOP REAR �

8 M01014700455 REAR PANEL BOTTOM �

9 M01014700449 SIDE PANEL RIGHT �

�0 M0�029001028BLOWER, CENTRIFUGALSYT 9-9L YILIDA

�

�� M0�059002051 V-BELT, SPZ 6�0 �

�2 M0�049001620 PULLEY, 1SPZ 100/1210 �

1� M0�109004920 BUSH PULLEY, 1210/25 �

14 M01014700458 MOTOR UPPER BASE �

15 M0�0490016�� PULLEY, 1SPZ 71/1108 �


�6 M0�109004914 BUSH PULLEY, 1108/19 �

17 M0�0�9001151MOTOR, Y801-4 0.55kWHUANQIU �80V/�Ph/50Hz, F

�

18 M5002470�622 COIL ASSY �

19 M01014700450 DRAIN PAN �

20 M5002470�62� CONDENSER ASSY �

2� M10014701414 WATER PIPE 2

22 M5001470�460BASE FRAME WELD ASSEMBLY

�

2� M01014700492 TERMINAL BOX �

24 M04019002846COMPRESSOR ZR61KC-TFD-522 COPELAND

�

25 A50054009748 ACCESS VALVE 2

26 M04109012946HIGH PRESSURE SWITCH

2

27 M04109012947 LOW PRESSURE SWITCH 2

56


Part not in diagram


M0�084702507 FILTER, 825*754*8*15mm �



2 M0101470045� FRONT PANEL MIDDLE �




6 M01014700457 TOP PANEL �




�0 M0�029001029BLOWER, CENTRIFUGAL SYT 10-10L YILIDA

�

�� M0�059002054 V-BELT, SPZ 710 �

�2 M0�049001622 PULLEY, 1SPZ 112/1610 �

1� M0�109004926 BUSH PULLEY, 1610/25 �


15 M0�0490016�4 PULLEY, 1SPZ 75/1108 �


�6 M0�109004916 BUSH PULLEY, 1108/24 �

17 M0�0�900115�MOTOR, Y901-4 1.1kW HUANQIU �80V/�Ph/50Hz, F

�

18 M5002470�4�� COIL ASSY �

19 M01014700450 DRAIN PAN �

20 M5002470�422 CONDENSER ASSY �

2� M10014701414 WATER PIPE 2


�


24 A50049004676COMPRESSOR ZR94KC-TFD-522 COPELAND

�


26 M04109012946 HIGH PRESSURE SWITCH 2


7

9

8

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4

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2

5

20

22

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18

1925

26

27

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17

14

57


Part not in diagram


M0�08470240� FILTER, 1025*775*8*15mm �



2 M01014700416 FRONT PANEL MIDDLE �




6 M0101470042� TOP PANEL �




�0 M0�0290010�0BLOWER, CENTRIFUGAL SYT 12-12L YILIDA

�

�� M0�059002095 V-BELT, SPZ 772 2

�2 M0�049001664 PULLEY, 2SPZ 106/1610 �

1� M0�109004926 BUSH PULLEY, 1610/25 �

14 M01014700420 MOTOR UPPER BASE 4

15 M0�049001676 PULLEY, 2SPZ 75/1210 �


�6 M0�109004921 BUSH PULLEY, 1210/28 �

17 M0�0�9001155MOTOR, Y1001-4 2.2kW HUANQIU �80V/�Ph/50Hz, F

�

18 M5002470�4�0 COIL ASSY �

19 M01014700409 DRAIN PAN �

20 M5002470�412 CONDENSER ASSY �

2� M10014701414 WATER PIPE 2


�



�




7

9

8

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2�

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4

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5

20

22

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18

1925

26

27

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17

14

58


Part not in diagram

A02189008219 PRESSURE GAUGE 2

M0�084702512 FILTER, 1466*725*8*15mm �



2 M010147005�1 FRONT PANEL MIDDLE �




6 M010147005�� TOP PANEL �

7 M010147005�8 PANEL TOP REAR �

8 M010147005�7 REAR PANEL BOTTOM �

9 M010147005�4 SIDE PANEL RIGHT �


�

�� M0�059002054 V-BELT, SPZ 710 2

�2 M0�049001668 PULLEY, 2SPZ 1�2/1610 �

1� M0�109004926 BUSH PULLEY, 1610/25 �


15 M0�049001677 PULLEY, 2SPZ 80/1210 �


�6 M0�109004921 BUSH PULLEY, 1210/28 �

17 M0�0�9001156MOTOR, Y1100L2-4 �kW HUANQIU �80V/�Ph/50Hz, F

�

18 M5002470�517 COIL ASSY �

19 M01014700522 DRAIN PAN �

20 M50024714040 CONDENSER ASSY �

2� M10014711001 WATER PIPE 2


�



�

M04019002846COMPRESSOR ZR61KC-TFD-522 COPELAND

�




7

9

8

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©2007 McQuay International +1 (800) 432-1342 www.mcquay.com

REGISTEREDS&E

While utmost care is taken in ensuring that all details in the publication are correct at the time of going to press, we are constantly striving for improvement and therefore reserve the right to alter model specifications and equipment without notice.Details of specifications and equipment are also subject to change to suit local conditions and requirements and not all models are available in every market.

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