Midea MGCT-F30W/PN1, MGBT-F60W/PN1, MGCT-D30W/PN1, MGBT-F120W/PN1, MGBT-F180W/PN1 User Manual

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

2

Content

1 General information ....................................................................................... 3

2. Features ......................................................................................................... 4

3. Specification ................................................................................................. 8

4 Dimension .................................................................................................... 14

5 Refrigeration system drawing ..................................................................... 22

6. Piping diagram ............................................................................................ 24

7 Wiring diagram ............................................................................................. 28

8 Electric characteristics ................................................................................ 36

9 Capacity tables ............................................................................................ 38

10 Exploded view ............................................................................................ 46

11 Trouble shooting ........................................................................................ 61

12 Installation .................................................................................................. 76

13 Commissioning ........................................................................................ 101

14 Maintenance ............................................................................................. 102

15 Control system ......................................................................................... 106

Appendix ..................................................................................................... 167

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

3

1 General information

1.1 Nomenclature

M G B T - F 60 W / P N1

1.2 Product list

No

Model

Power supply

Heat exchanger

type

Maximum

combinations

Maximum

capacity(kW)

Wired controller

1

MGCT-F30W/PN1

380V/3Ph/60Hz

Double pipe

16

480

KJRM-120D/BMK-E

2

MGCT-D30W/PN1

380V/3Ph/60Hz

Double pipe

16

480

KJRM-120D/BMK-E

3

MGBT-F60W/PN1

380V/3Ph/60Hz

Shell and tube

16

960

KJRM-120D/BMK-E

4

MGBT-F120W/PN1

380V/3Ph/60Hz

Shell and tube

8

960

KJRM-120D/BMK-E

5

MGBT-F180W/PN1

380V/3Ph/60Hz

Shell and tube

5

900

KJRM-120D/BMK-E

Refrigerant type

N1:R410A Omit for R22

Power Supply

P: 380V, 60Hz, 3Ph
D: 220V, 60Hz, 3Ph

Outdoor Unit
Rated cooling capacity (kW)
The special function code

D: Digital scroll
F: Fixed scroll
V: Inverter system

T: T3 condition

Omit for T1 condition

The heat exchanger type

A: Plate
B: Shell and tube
C: Double pipe

Light chiller system
Midea

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

4

1.3 External appearance

60kW

120kW

180kW

30kW

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

5

2. Features

1). Wide range of outlet water temperature

Cooling: 5~17˚C (7˚C is default, set in factory), 0~17˚C can be available by switch the S5 on PCB, the
antifreeze must be put into pipeline.

Heating: 40~50˚C (45˚C is default, set in factory), 22~50˚C can be available by switch the address.

Mode

Outlet water temp.

Cooling(S5
address)

Normally(OFF)

5~17℃

Low water temp.(ON)

0~17℃

Heating(S4
address)

Normally(OFF)

40~50℃

Low water temp. (ON)

22~50℃

2).Humanized remote control

S7 address on PCB should be switched to ON to realize remote
control, which including remote ON/OFF, remote heating and
cooling mode selection, remote alarm. The customer can simply
and conveniently control the chiller and acquire the running
information on real time in door.

3).Modular design, flexible combination, more convenient for design and installation.

The unit adopts modular design, which can make more units to connect together. The units can be
combined freely, meanwhile every separate module can be operated as main unit, also each module can be
a slave unit with modules combination, more convenient for design and installation.

4).The maximum combination of the system consists of 1 main unit and 15 slave units for
30kW&60kW modules, 1 main unit and 7 slave units for 120kW module, 1 main unit and 4 slave units
for 180kW module.

Easy connection between main unit and slave units.
All the units can be connected together with a wired controller in series type. Using three-core shielded
twisted wire as communication wire.

Wired controller

Three-core shielding
twisted pair

Three-core shielding
twisted pair

Water outlet temp.

Water outlet temp.

Water outlet temp.

Total water outlet temp.
(Just for master unit)

Total water outlet temp.

(Just for master unit)

Total water outlet temp.
(Just for master unit)

5).Environmental care

Ecological R410A refrigerant.

60kW

60kW

960kW

Max 16 modules

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

6

 Chlorine-free and environmental friendly refrigerant, zero ozone depletion potential.
 High-density refrigerant, therefore, less refrigerant required.
 Leak-tight refrigerant circuit, Brazed refrigerant connections for increased leak-tightness.

6) Economical operation

New design adopts electronic expansion valve precise refrigerant control in wider range. Electronic
expansion valve allows operation at lower condensing pressure, adjustment can be made fast linear
response, making the system more stable output, the indoor temperature more uniform, and enhance
human comfortable.

7).Back up function
When unit is failure

 If master unit fails, all the units will stop.
 If one slave unit fails, this unit will stop but the others will

keep running.

 When the master unit fails, any of the slave one can be set

as the master unit by manual setting.

When unit is under protection

 If master unit’s protection occurs, this unit will stop but the

others will keep running.

 If slave unit’s protection occurs, this unit will stop but the

others will keep running.

 ( Except PE, P9 protection happen)

8).Strong micro-computer intelligent control and monitor function.

Optimizing the design of system and using varieties of protection devices, to make the system more safe
and reliable.

9). Superior reliability

System will be more reliable with new type efficient heat exchanger. The 30kW module adopts double pipe
heat exchanger, the 60&120&180kW module adopt shell and tube heat exchanger for evaporator.

Shell and tube heat exchanger

Master Slave

Master Slave

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

7

10). Applicable temperature range

Mode

Ambient temperature range

Water outlet temperature range

Cooling

10˚C ~52˚C

0~17˚C(The antifreeze must be added.)

Heating

-10˚C ~24˚C

22˚C ~50˚C

Chilled outlet water temperature can be adjusted by wired controller according to customer’s demand.

-15˚C

Ambient temperature range

-10˚C

-5˚C

0˚C

5˚C

10˚C

15˚C

20˚C

25˚C

30˚C

35˚C

40˚C

45˚C

50˚C
Cooling range

10˚C

52˚C

Heating range

-10˚C

24˚C

Water outlet temperature range

5˚C

17˚C

50˚C

5˚C

17˚C

Heating range

Cooling range

40˚C

22˚C

0˚C

40˚C

50˚C

Cooling range

0˚C

17˚C

Heating range

22˚C

50˚C

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

8

3. Specification

Model

MGCT-F30W/PN1

MGCT-D30W/PN1

Cooling Capacity (*1)
kW

30

30

Btu/h

102,300

102,300

Cooling Capacity (*2)
kW

25.8

25.8

Btu/h

88,030

88,030

Heating Capacity

kW

32

32

Power input

Cooling (*1)

kW

10.0

10.0

Cooling rated current (*1)

A

16.3

16.3

Cooling (*2)

kW

12

12

Cooling rated current (*2)

A

19.56

19.56

Heating

kW

9.8

9.8

Heating rated current

A

16.0

16.0

Power supply

V/Ph/Hz

380/3/60

380/3/60

Power supply
Manual switch A 50

50

Fuse

A

36

36

Max. Input consumption

kW

14.8

13.8

Max. Current

A

25.3

24.2

Compressor

Type

Scroll (fixed speed)

Scroll (Digital +fixed speed)

Brand

Copeland

Copeland

Model

ZP57K3E-TF7-522

ZPD51K5E-TF7-532/

ZP57K3E-TF7-522

Quantity

Pieces

2

1+1

Capacity

Btu/h

58000

50400/58000

Input

kW

5.48

4.71/5.48

Rate load current(RLA)

A

10.1

9.6/10.1

Locked rotor Amp(LRA)

A

94

65.6/94

Refrigerant oil

ml

1685

1242/1685

Refrigerant
Type

R410A

R410A

Refrigerant control

EXV

EXV

Weight

lb

6.834×2

6.834×2

Condenser (Air side)

Air side heat-exchanger type

Fin-coil

Fin-coil

Quantity of fan motor

Pieces

1

1

Air flow volume

×103m3/h

12

12

Fan motor model

YDK550-8B

YDK550-8B

Fan motor rated current

A

4

4

Fan motor input

kW

0.85

0.85

Evaporator (Water
side)

Water side heat-exchanger type

Double pipe

Double pipe

Water resistance loss

kPa

60

60

Water inlet/outlet pipeline
inside normal diameter

inch

1-1/2”

1-1/2”

Water flow volume

m3/h

5.2

5.2

Max. Pressure

MPa

1

1

Water pipe connection type

Flexible joint

Flexible joint

Dimension
Net(W×H×D)

inch

59.61×73.43×33.11

59.61×73.43×33.11

Packing size(W×H×D)

inch

62.6×81.3×39.17

62.6×81.3×39.17

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

9

Weight
Net weight

lb

837.8

837.8

Gross weight

lb

881.8

881.8

Connection wiring
Power wire

mm2×No.

10×4+6 ×1

10×4+6 ×1

Signal wire

mm2×No.

0.75×3-core with shielding

Control type

Wired controller

Safety protection device

1) Protection for over-high discharge pressure

2) Protection for over-low suction pressure

3) Power supply phase sequence protection

4) Anti-freezing protection in cooling mode

5) Anti-freezing protection in winter

6) Protection for compressor over current

7) Protection for compressor overload

8) Outlet and inlet water temperature difference protection

9) Compressor discharge temperature protection

10) Water flow cut-off protection

11) Sensor malfunction protection

12) Low-temperature protection of shell and tube heat
exchanger.

Noise level

dB(A)

67

Operation water temperature

℃

Cooling：0～17(Less than 5℃ must add antifreeze.)
Heating：22～50

Ambient temperature

℃

Cooling：10～52 Heating：-10～21

Note:

Please refer to the water flow volume in the above table strictly to design and install.
Specifications are based on the following conditions:
Cooling : (*1)chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 35°C DB.

(*2) chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 46°C DB.
Heating : warm water inlet/outlet: 40℃ / 45℃, and outdoor ambient temp. 7°C DB/6°C WB.
Water side fouling factor: 0.086m2·℃/kW.
1m away in open field (sound pressure).

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

10

Model

MGBT-F60W/PN1

MGBT-F120W/PN1

Cooling Capacity (*1)
kW

60

120

Btu/h

204,700

409,400

Cooling Capacity (*2)
kW

51.6

103.2

Btu/h

176,100

352,100

Heating Capacity

kW

65

130

Power input

Cooling (*1)

kW

19.7

39.4

Cooling rated current (*1)

A

63

126

Cooling (*2)

kW

23.64

47.28

Cooling rated current (*2)

A

75.6

151.2

Heating

kW

19.9

39.8

Heating rated current

A

65.5

130

Power supply

V/Ph/Hz

380/3/60

380/3/60

Power supply
Manual switch A 125

200

Fuse

A

100

150

Max. Input consumption

kW

26.9

51.44

Max. Current

A

48.7

95

Compressor

Type

Scroll (fixed speed)

Scroll (fixed speed)

Brand

Danfoss

Danfoss

Model

SH105A9ALC

SH105A9ALC

Quantity

Pieces

2

4

Capacity

Btu/h

97060

97060

Input

kW

9.9

9.9

Rate load current(RLA)

A

21.4

21.4

Locked rotor Amp(LRA)

A

124

124

Refrigerant oil

ml

3300

3300

Refrigerant
Type

R410A

R410A

Refrigerant control

EXV+ capillary

EXV+ capillary

Weight

lb

14.33×2

14.33×4

Condenser (Air
side)

Air side heat-exchanger type

Fin-coil

Fin-coil

Quantity of fan motor

Pieces

2

4

Air flow volume

×103m3/h

24

48

Fan motor model

YS650-8C

YS650-8C

Fan motor rated current

A

2.1×2

2.1×4

Fan motor input

kW

1.03×2

1.03×4

Evaporator (Water
side)

Water side heat-exchanger type

Shell and tube

Shell and tube

Water resistance loss

kPa

15

25

Water inlet/outlet pipeline
inside normal diameter

inch

4”

2-1/2”

Water flow volume

m3/h

10.3

20.6

Max. Pressure

MPa

1

1

Water pipe connection type

Flexible joint

Flexible joint

Dimension
Net(W×H×D)

inch

78.74×74.02×35.43

78.74×82.28×66.34

Packing size(W×H×D)

inch

82.28×82.48×38.78

81.89×88.19×69.09

Weight
Net weight

lb

1,300.727

2,601.455

Gross weight

lb

1,388.889

2,711.64

Connection wiring

Power wire

mm2×No

16×4+10 ×1

35×3+16 ×2

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

11

Signal wire

mm2×No

0.75×3-core with shielding

0.75×3-core with shielding

Control type

Wired controller

Wired controller

Safety protection device

1) Protection for over-high discharge pressure

2) Protection for over-low suction pressure

3) Power supply phase sequence protection

4) Anti-freezing protection in cooling mode

5) Anti-freezing protection in winter

6) Protection for compressor over current

7) Protection for compressor overload

8) Outlet and inlet water temperature difference protection

9) Compressor discharge temperature protection

10) Water flow cut-off protection

11) Sensor malfunction protection

12) Low-temperature protection of shell and tube heat
exchanger.

Noise level

dB(A)

67

70

Operation water temperature

℃

Cooling：0～17(Less than 5℃ must add antifreeze.)
Heating：22～50

Ambient temperature

℃

Cooling：10～52 Heating：-10～21

Note:

Please refer to the water flow volume in the above table strictly to design and install.
Specifications are based on the following conditions:
Cooling : (*1)chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 35°C DB.

(*2) chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 46°C DB.
Heating : warm water inlet/outlet: 40℃ / 45℃, and outdoor ambient temp. 7°C DB/6°C WB.
Water side fouling factor: 0.086m2·℃/kW.

1m away in open field (sound pressure).

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

12

Model

MGBT-F180W/PN1

Cooling Capacity (*1)
kW

180

Btu/h

614,100

Cooling Capacity (*2)
kW

154.8

Btu/h

528,200

Heating Capacity

kW

195

Power input

Cooling (*1)

kW

59.1

Cooling rated current (*1)

A

189

Cooling (*2)

kW

70.92

Cooling rated current (*2) A 226.8

Heating

kW

59.7

Heating rated current A 196.5

Power supply

V/Ph/Hz

380/3/60

Power supply
Manual switch

A

350

Fuse

A

300

Max. Input consumption

kW

76.5

Max. Current

A

140

Compressor

Type

Scroll (fixed speed)

Brand

Danfoss

Model

SH105A9ALC

Quantity

Pieces

6

Capacity

Btu/h

97060

Input

kW

9.9

Rate load current(RLA) A 21.4

Locked rotor Amp(LRA) A 124

Refrigerant oil

ml

3300

Refrigerant
Type

R410A

Refrigerant control

EXV+ capillary

Weight

lb

14.33×6

Condenser (Air side)

Air side heat-exchanger type

Fin-coil

Quantity of fan motor

Pieces

6

Air flow volume

×103m3/h

72

Fan motor model

YS650-8C

Fan motor rated current A 2.1×6

Fan motor input

kW

1.03×6

Evaporator
(Water side)

Water side heat-exchanger type

Shell and tube

Water resistance loss

kPa

30

Water inlet/outlet pipeline
inside normal diameter

inch

3”

Water flow volume

m3/h

31

Max. Pressure

MPa 1 Water pipe connection type

Flexible joint

Dimension
Net(W×H×D)

inch

112.21×83.07×78.74

Packing size(W×H×D)

inch

117.32×88.98×84.06

Weight
Net weight

lb

3,813.93

Gross weight

lb

3,924.16

Connection wiring

Power wire

mm2×No.

70×3+35 ×2

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

13

Signal wire

mm2×No.

0.75×3-core with shielding

Control type

Wired controller

Safety protection device

12) Protection for over-high discharge pressure

13) Protection for over-low suction pressure

14) Power supply phase sequence protection

15) Anti-freezing protection in cooling mode

16) Anti-freezing protection in winter

17) Protection for compressor over current

18) Protection for compressor overload

19) Outlet and inlet water temperature difference

protection

20) Compressor discharge temperature protection

21) Water flow cut-off protection

22) Sensor malfunction protection

12) Low-temperature protection of shell and tube
heat exchanger.

Noise level

dB(A)

74

Operation water temperature

℃

Cooling：0～17(Less than 5℃ must add

antifreeze.)

Heating：22～50

Ambient temperature

℃

Cooling：10～52 Heating：-10～24

Note:

Please refer to the water flow volume in the above table strictly to design and install.
Specifications are based on the following conditions:
Cooling : (*1)chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 35°C DB.

(*2) chilled water inlet/outlet: 12℃ / 7℃, and outdoor ambient temp. of 46°C DB.
Heating : warm water inlet/outlet: 40℃ / 45℃, and outdoor ambient temp. 7°C DB/6°C WB.
Water side fouling factor: 0.086m

2

·℃/kW.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

14

4 Dimension

30kW module

Model

Unit

A B C D E

F

MGCT-F30W/PN1

MGCT-D30W/PN1

mm

1514

841

1865

115

315

172

inch

59.6

33.11

73.43

4.53

12.4

6.77

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

15

No.

Name

1

Top cover

2

Air outlet

3

Air inlet

4

Water outlet

5

Water inlet

6

Electric control box

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

16

60kW module

Front view

Top view

Model

Unit

A B C D E F G H I J K

MGBT-F60W/PN1

mm

2000

900

1880

350

1420

225

1500

506

530

930

450

inch

78.74

35.4

74

13.78

55.91

8.86

59.06

19.92

20.87

36.61

17.72

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

17

No.

Name

1

Top cover

2

Air outlet

3

Air inlet

4

Water outlet

5

Compressor

6

Electric control box

7

Water inlet

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

18

120kW module

Front view Side view

Top view Anchor hole

Model

Unit

A B C D E F G

H

MGBT-F120W/PN1

mm

2000

1685

2080

355

1420

506

1550

1586

inch

78.74

66.34

81.89

13.98

55.91

19.92

61.02

62.44

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

19

No.

Name

1

Top cover

2

Condenser

3

Compressor

4

Evaporator

5

Electric control box air inlet

6

Water outlet

7

Water inlet

8

Compressor

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

20

180kW module

Model

unit A B C D E F G H

MGBT-F180W/PN1

mm

2850

2000

2110

3470

2156

506

1888

2388

inch

112.2

78.74

83.07

136.61

84.88

19.92

74.33

94.02

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

21

No.

Name

1

Top cover

2

Compressor

3

Evaporator

4

Water outlet

5

Electric control box

6

Water inlet

7

Condenser

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

22

5 Refrigeration system drawing

5.1 30kW module refrigeration system sketch drawing

Each module has two compressors with one separate unit, one double pipe evaporator for two refrigerant
systems.

Compressor A

Compressor B

Low pressure cylinder A

Low pressure cylinder B

4-way valve A

4-way valve B

Condenser

Evaporator

(Double-pipe heat exchanger)

Fan

Water outlet

Water inlet

EXV

EXV

5.2 60kW module refrigeration system sketch drawing

Each module has two compressors with one separate unit, one shell and tube evaporator for two refrigerant
systems.

Dry type evaporator

Condenser

Water flow direction

Compressor B

low pressure cylinder B

4-Way valve A

Fan A

EXV

Capillary

EXV

4"

Capillary

Fan B

4-Way valve B

Compressor A

low pressure cylinder A

Fan

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

23

5.3 120kW module refrigeration system sketch drawing

Each module has four compressors with two separate units, one shell and tube evaporator for four
refrigerant systems.

Dry type evaporator

Condenser

Water flow direction

Compressor B

low pressure cylinder B

4-Way valve A

Fan A

EXV

Capillary

EXV

2-1/2"

Unit 2

Capillary

Fan B

4-Way valve B

Compressor A

low pressure cylinder A

Unit 1

5.4 180kW module refrigeration system sketch drawing

Each module has six compressors with three separate units, one shell and tube evaporator for six refrigerant
systems.

Dry type evaporator

Condenser

Water flow direction

Compressor B

low pressure cylinder B

4-Way valve A

Fan A

EXV

Capillary

EXV

3"

Unit 2

Unit 3

Capillary

Fan B

4-Way valve B

Compressor A

low pressure cylinder A

Unit 1

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

24

6. Piping diagram

6.1 30kW module water pipeline sketch drawing

The table below describes the symbols.

Symbol

Symbol explanation

Symbol

Symbol explanation

Stop valve

Y-shaped filter

Pressure gauge

Thermometer

Water flow switch

Circulating pump

Gate valve

Check valve

Flexible joint

Automatic discharge valve

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

25

6.2 60kW module water pipeline sketch drawing

The table below describes the symbols.

Symbol

Symbol explanation

Symbol

Symbol explanation

Stop valve

Y-shaped filter

Pressure gauge

Thermometer

Water flow switch

Circulating pump

Gate valve

Check valve

Flexible joint

Automatic discharge valve

Main unit

Expansion tank

Water replenishing

Dirt discharge valve

Differential pressure by-pass valve

Drain valve

Two-way valve

Three-way valve

Terminal

Auxiliary electric heater

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

26

6.3 120kW module water pipeline sketch drawing

The table below describes the symbols.

Symbol

Symbol explanation

Symbol

Symbol explanation

Stop valve

Y-shaped filter

Pressure gauge

Thermometer

Water flow switch

Circulating pump

Gate valve

Check valve

Flexible joint

Automatic discharge valve

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

27

6.4 180kW module water pipeline sketch drawing

The table below describes the symbols.

Symbol

Symbol explanation

Symbol

Symbol explanation

Stop valve

Y-shaped filter

Pressure gauge

Thermometer

Water flow switch

Circulating pump

Gate valve

Check valve

Flexible joint

Automatic discharge valve

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

28

7 Wiring diagram

7.1 Wiring diagram

30kW module

XP8

XP7

XS8

XS7

T

3

B

T3A

COMP A

2

5

21

3

6

22

4

T3(W)

A1

A2

T2(V)

T1(U)

HEAT_A

QP

(E)

PMV(B)

RED BLACK

CH EC K

CN 18 ( WH I T E）

PO WE R

PW M

CN 17

CN 11 （BL AC K）

CN 24

PU MP

HE AT

CN 1（W HI TE ）

PM V (A )

CN 2（R ED）

PM V( B )

CN 5

H& L_ P RO

CN 6

CO M (I )

CN 25

CO M( O )

CN 10

CN 21 CN 14

PMV(A)

CN 19（W H IT E）

TR AN S O UT

FA N_ A

CN 30

FA N_ B

CN 31

COMP B

2

1

5213

6

22

4

T3(W)

A1

A2

T2(V)

T1(U)

RED

PUR PL E

BLA CK

BLU E

RE D

WH IT E

S1

T3 A T3 B T 4

XT 7

XT 6

W1 W 2

HE A T_ B

TR AN S

ON /O F F

AL AR M

BL AC K

RED

RE D

BLUE

BLACK

XS9

XP9

T

4

WHITE

R

E

D

B

L

U

E

K1(A)

H_PRO(A)

K1(B)

H_PRO(B)

L_PRO(1A)

L_PRO(1B)

BLACK

L1 L2

CN 7

CN 8

BLA CK

S2 S3

ON

SW 2

S4 S5

OFF

S7 S8

ON

SW 3

S9

OFF

ORA NG E

L_PRO(2B)

L_PRO(2A)

CN 15

CN 5

CN 6

L3 L4

CN 4

CN 22

CN 26

ON /O FFP Q E

BLA CK

XT 5

BLACK

BLACK

BLACK

5V

Y&G

RED

WHITE

KM1

HIGH

BLA C K

BL UE

RE LA Y

FAN C A P

WHITE

BLUE

RED

RED

CON DENS ER

TEM P B

CON DENS ER

TE MP A

HIG H PR ES SU RE

PRO TE CT OR B

LOW P RE SSU RE

PRO TE CT OR 1B

LOW P RE SSU RE

PRO TE CTO R 1A

HIG H PR ES SU RE

PRO TE CT OR A

TEM P PR OTE CT OR

SWI TC H A

TEM P PR OTE CT OR

SWI TC H B

ORANGE

RED

PURPLE

YELLOW

CURRENT(B2)

CURRENT(A2)

RED

PURPLE

CO M

NC

FLO W

SWT IC H

PU MP

（EFF ECT ON NO.0 MODU LE）

(ON / OFF SI GN AL !)

LO W VO L T A G E S I G NAL

DO N' T C O N N E C T H IGH VO LT A G E !

PRO VI DE

BY US ER

PRO VI DE

BY US ER

(O N / O FF S I G N AL ! )

11- WA Y

TER MI NA L

XT2

BLU E

BLU E

GRA Y

Y

E

L

L

O

W

B

L

A

C

K

G

R

A

Y

B

L

A

C

K

R

E

D

B

R

O

W

N

R

E

D

R

E

D

G

R

A

Y

(YE LLOW)(R ED )

BL UE

BL UE

YEL L OW

(B LU E)

B

L

U

E

MAIN BOARD

CURRENT BOARD

ORA N GE

BLUE

PU RP LE

RE D

PWM PRESSURE

RELIF VALVE

BLUE

Y&G

MIDD LE

WIRE J OINT

MIDD LE

WIRE J OINT

MID DLE

WIR E JOINT

S.V(A)

4-VALVE A

4- WA Y TE RM IN AL

XT 1

POW E R I N

SW3

S1

16- WAY D AIL S WIT CH FU NCT IO N

DAI L SWI TCH A DDR ESS

1 2 3

ON

3 4

SW2

1 2

OFF

S2 ON:COOL ONLY OFF:R&C

S3 ON:DIGITAL OFF:FIXED

S4 ON:H-EEPROM OFF:NORMAL

S5 ON:C-EEPROM OFF:NORMAL

S7 ON:REMOTE CONTROL OFF:WIRE CONTROL

S8 ON:LOW TEMP.MODE OFF:NORMAL

S9 ON:30KW OFF:65/130/200/260K W

S2 S3 S4 S5 S7 S8 S9

SW2/SW3 FUCTION DEFINATION

ON

OFF

DEFAULT SETTING

REMOTE TURN OFF

OFF

ON/OFF

S7

ON

REMOTE FUCTION SETTING

REMOTE COOL

ON OFF

REMOTE HEAT

ON OFF

SW 3

1 2 3

ON

3 4

SW 2

1 2

OFF

S2 S3 S4 S5 S7 S8 S9

ON

OFF

DIGITAL

FIXED

BLACK

R

E

D

B

L

U

E

AC C ON T AC TO R

AC C O NT A CT OR COM PRES SOR A

COM PRES SOR B

BLUE

RED

WHI TE

Y&G

CR AN KC AS E HEAT ER

Y&G

BLACK

BLUE

RED

WHI TEBLACK

IN- LE T WAT ER T EM P SEN SO R

ANT I- FR EE ZIN G TE MP SE NS OR

TOT AL O UT- LE T WA TE R TEM P

UNI T OU T- LE T WAT ER T EMP

MA R K：NO RM A L MO D UL E S DO N 'T I NC L UD E

BR O KE N L IN E AN D T HE IR JO IN T W IR E S

OUT D O O R W I R ING DIAG R A M

BROWN

BROWN

BLACK BLACK

BLU E

BRO WN

BLACK

RE D

BLUE

WH IT E

S.V(B)

4-VALVE B

CR AN KC AS E HEAT ER

BRO WN

BRO WN

BRO WN

BRO WN

BRO WN

H2 P 1 P 2H1

4- WA Y T ER MI NA L

XT 3

YE LL OW

KM2

RE LA Y

LOW

BLU E

（WH IT E）

BLU E

YE LL OW

YE LL OW

202090191107

HEA T

RES

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

29

60kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

30

120kW module

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

31

180kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

32

7.2 Networking communication schematic

30kW module

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

33

60kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

34

120kW module

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

35

180kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

36

8 Electric characteristics

Model

Outdoor Unit

Power Supply

Compressor

OFM

Hz

Phase

Voltage

Min.

Max.

TOCA

MFA

LRA

RLA

KW

FLA

MGCT-F30W/PN1

60 3 380

342

418

28.5

36

94(×2)

10.1(×2)

0.85

4

MGCT-D30W/PN1

60 3 380

342

418

28.5

36

65.6/94

9.6/10.1

0.85

4

MGBT-F60W/PN1

60 3 380

342

418

55.6

70

124(×2)

21.4(×2)

1.03(×2)

2.1(×2)

MGBT-F120W/PN1

60 3 380

342

418

222.4

260

124(×4)

21.4 (×4)

1.03 (×4)

2.1(×4)

MGBT-F180W/PN1

60 3 380

342

418

180

300

124(×6)

21.4(×6)

1.03 (×6)

2.1(×6)

Remark:

TOCA: Total Over-current Amps. (A)
MFA: Max. Fuse Amps. (A)
LRA: Locked Rotor Amps. (A)
RLA: Rated Load Amps. (A)
OFM: Outdoor Fan Motor.
KW: Rated Motor Input (KW)
FLA: Full Load Amps.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

38

9 Capacity tables

9.1 MGCT-F30W/PN1, MGCT-D30W/PN1

Cooling:

Chilled water

outlet temp.

Ambient temp.(℃)

21.00

25.00

30.00

35.00

40.00

46.00

52.00

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

5.00

33.59

8.81

31.63

9.08

29.84

9.36

28.20

9.65

26.42

10.13

24.31

10.64

21.88

11.17

6.00

34.72

8.94

32.66

9.22

30.79

9.51

29.07

9.80

27.27

10.29

25.11

10.80

22.63

11.34

7.00

35.93

9.13

33.77

9.41

31.80

9.70

30.00

10.00

28.17

10.50

25.97

11.03

23.43

11.58

8.00

37.04

9.40

34.78

9.69

32.72

9.99

30.84

10.30

28.99

10.82

26.76

11.36

24.16

11.92

9.00

38.09

9.49

35.73

9.79

33.58

10.09

31.62

10.40

29.75

10.92

27.49

11.47

24.85

12.04

10.00

39.53

9.63

37.05

9.93

34.79

10.24

32.73

10.56

30.83

11.08

28.52

11.64

25.81

12.22

11.00

40.63

9.73

38.05

10.03

35.69

10.34

33.54

10.66

31.63

11.19

29.29

11.75

26.54

12.34

12.00

41.56

9.87

38.88

10.18

36.44

10.49

34.22

10.82

32.30

11.36

29.94

11.92

27.16

12.52

13.00

42.31

9.95

39.54

10.26

37.02

10.58

34.73

10.90

32.82

11.45

30.46

12.02

27.65

12.62

14.00

43.36

10.02

40.48

10.33

37.87

10.65

35.49

10.98

33.58

11.53

31.19

12.10

28.35

12.71

15.00

43.92

10.07

40.97

10.38

38.29

10.70

35.85

11.03

33.95

11.58

31.57

12.16

28.73

12.77

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

39

Heating:

Hot water outlet

temp.

Ambient temp.(℃)

-10

-6

-2 2 7

10

13

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

40.00

19.89

6.13

24.86

6.97

29.25

7.74

32.50

8.42

35.33

8.86

39.57

9.39

45.50

10.14

41.00

19.22

6.26

24.06

7.11

28.34

7.90

31.52

8.59

34.30

9.04

38.34

9.58

44.02

10.35

42.00

18.67

6.38

23.39

7.26

27.58

8.06

30.72

8.76

33.46

9.22

37.34

9.78

42.79

10.56

43.00

18.22

6.52

22.86

7.40

26.98

8.23

30.08

8.94

32.80

9.41

36.54

9.98

41.81

10.77

44.00

17.86

6.65

22.44

7.55

26.53

8.39

29.61

9.12

32.32

9.60

35.94

10.18

41.04

10.99

45.00

17.60

6.78

22.14

7.71

26.21

8.57

29.28

9.31

32.00

9.80

35.52

10.39

40.49

11.22

46.00

17.26

6.85

21.74

7.79

25.76

8.65

28.81

9.40

31.52

9.90

34.92

10.49

39.74

11.33

47.00

16.75

6.99

21.12

7.94

25.06

8.82

28.06

9.59

30.73

10.10

33.99

10.70

38.61

11.56

48.00

16.09

7.20

20.31

8.18

24.13

9.09

27.05

9.88

29.66

10.40

32.74

11.02

37.13

11.90

49.00

15.21

7.49

19.23

8.51

22.87

9.45

25.67

10.27

28.17

10.81

31.05

11.46

35.15

12.38

50.00

14.23

7.86

18.02

8.93

21.45

9.92

24.10

10.79

26.48

11.36

29.13

12.04

32.92

13.00

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

40

9.2 MGBT-F60W/PN1

Cooling

Chilled water

outlet temp.

Ambient temp.(℃)

21.00

25.00

30.00

35.00

40.00

46.00

52.00

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

5.00

67.17

17.35

63.25

17.89

59.67

18.44

56.40

19.01

52.85

19.96

48.62

20.96

43.76

22.01

6.00

69.44

17.62

65.33

18.17

61.57

18.73

58.14

19.31

54.54

20.27

50.23

21.28

45.25

22.35

7.00

71.87

17.98

67.54

18.54

63.60

19.11

60.00

19.70

56.34

20.69

51.95

21.72

46.85

22.81

8.00

74.09

18.52

69.57

19.09

65.44

19.68

61.68

20.29

57.98

21.31

53.51

22.37

48.32

23.49

9.00

76.18

18.70

71.46

19.28

67.16

19.87

63.24

20.49

59.51

21.51

54.99

22.59

49.71

23.72

10.00

79.06

18.98

74.10

19.57

69.58

20.17

65.45

20.80

61.66

21.84

57.03

22.93

51.61

24.07

11.00

81.27

19.17

76.09

19.76

71.38

20.37

67.09

21.00

63.27

22.05

58.58

23.15

53.08

24.31

12.00

83.13

19.45

77.76

20.05

72.88

20.67

68.43

21.31

64.60

22.37

59.88

23.49

54.31

24.67

13.00

84.61

19.60

79.08

20.21

74.04

20.83

69.46

21.48

65.64

22.55

60.91

23.68

55.31

24.86

14.00

86.72

19.74

80.97

20.35

75.74

20.98

70.99

21.63

67.15

22.71

62.38

23.84

56.71

25.04

15.00

87.83

19.84

81.93

20.45

76.57

21.08

71.70

21.73

67.90

22.82

63.14

23.96

57.46

25.16

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

41

Heating

Hot water

outlet temp.

Ambient temp.(℃)

-10

-6

-2 2 7

10

13

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

40.00

40.40

12.45

50.50

14.15

59.41

15.72

66.02

17.09

71.76

17.99

80.37

19.07

92.42

20.59

41.00

39.04

12.71

48.87

14.44

57.56

16.04

64.02

17.44

69.67

18.36

77.89

19.46

89.41

21.01

42.00

37.92

12.96

47.51

14.73

56.03

16.37

62.39

17.79

67.97

18.73

75.85

19.85

86.93

21.44

43.00

37.00

13.23

46.42

15.03

54.81

16.70

61.10

18.16

66.63

19.11

74.23

20.26

84.92

21.88

44.00

36.28

13.50

45.58

15.34

53.88

17.04

60.14

18.53

65.65

19.50

73.00

20.67

83.37

22.33

45.00

35.76

13.77

44.98

15.65

53.23

17.39

59.48

18.91

65.00

19.90

72.15

21.09

82.25

22.78

46.00

35.06

13.91

44.15

15.81

52.32

17.57

58.52

19.09

64.03

20.10

70.94

21.30

80.73

23.01

47.00

34.02

14.19

42.90

16.13

50.90

17.92

56.99

19.48

62.42

20.50

69.04

21.73

78.43

23.47

48.00

32.68

14.62

41.26

16.61

49.01

18.46

54.94

20.06

60.24

21.12

66.50

22.38

75.42

24.17

49.00

30.90

15.20

39.07

17.27

46.45

19.19

52.13

20.86

57.23

21.96

63.06

23.28

71.39

25.14

50.00

28.91

15.96

36.60

18.14

43.57

20.15

48.95

21.91

53.79

23.06

59.17

24.44

66.87

26.40

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

42

9.3 MGBT-F120W/PN1

Cooling:

Chilled water

outlet temp.

Ambient temp.(℃)

21.00

25.00

30.00

35.00

40.00

46.00

52.00

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

5.00

134.35

34.70

126.50

35.77

119.34

36.88

112.80

38.02

105.69

39.92

97.24

41.49

87.51

43.57

6.00

138.88

35.24

130.65

36.33

123.14

37.45

116.28

38.61

109.07

40.54

100.45

42.14

90.51

44.24

7.00

143.73

35.96

135.09

37.07

127.20

38.22

120.00

39.40

112.68

41.37

103.89

43.44

93.71

45.61

8.00

148.17

37.04

139.13

38.18

130.88

39.36

123.36

40.58

115.96

42.61

107.03

44.74

96.65

46.98

9.00

152.35

37.40

142.92

38.55

134.32

39.75

126.48

40.98

119.02

43.02

109.97

45.18

99.41

47.43

10.00

158.13

37.96

148.20

39.13

139.15

40.34

130.91

41.59

123.31

43.67

114.07

45.85

103.23

48.15

11.00

162.54

38.33

152.19

39.52

142.77

40.74

134.18

42.00

126.53

44.10

117.17

46.31

106.15

48.62

12.00

166.26

38.89

155.53

40.10

145.76

41.34

136.86

42.62

129.20

44.75

119.77

46.98

108.63

49.33

13.00

169.22

39.20

158.15

40.42

148.08

41.67

138.92

42.96

131.28

45.10

121.82

47.36

110.62

49.73

14.00

173.43

39.48

161.94

40.70

151.48

41.96

141.97

43.25

134.31

45.42

124.77

47.69

113.42

50.07

15.00

175.66

39.67

163.86

40.90

153.14

42.16

143.39

43.47

135.79

45.64

126.29

47.92

114.92

50.32

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

43

Heating:

Hot water

outlet temp.

Ambient temp.(℃)

-10

-6

-2 2 7

10

13

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

40.00

80.80

24.90

101.00

28.30

118.83

31.44

132.03

34.18

143.51

35.98

160.73

38.13

184.85

41.19

41.00

78.09

25.41

97.73

28.88

115.11

32.08

128.05

34.87

139.33

36.71

155.77

38.91

178.83

42.03

42.00

75.83

25.93

95.03

29.47

112.06

32.74

124.79

35.59

135.93

37.46

151.70

39.71

173.85

42.88

43.00

74.00

26.46

92.85

30.07

109.62

33.41

122.21

36.31

133.27

38.22

148.46

40.52

169.84

43.76

44.00

72.57

27.00

91.17

30.68

107.76

34.09

120.27

37.05

131.30

39.00

146.01

41.34

166.74

44.65

45.00

71.52

27.55

89.96

31.31

106.46

34.79

118.95

37.81

130.00

39.80

144.30

42.19

164.50

45.56

46.00

70.12

27.83

88.31

31.62

104.63

35.13

117.04

38.19

128.05

40.20

141.88

42.61

161.46

46.02

47.00

68.05

28.38

85.81

32.25

101.79

35.84

113.99

38.95

124.85

41.00

138.08

43.46

156.86

46.94

48.00

65.36

29.23

82.52

33.22

98.01

36.91

109.88

40.12

120.48

42.23

133.01

44.77

150.83

48.35

49.00

61.80

30.40

78.13

34.55

92.90

38.39

104.27

41.73

114.46

43.92

126.13

46.56

142.78

50.28

50.00

57.82

31.92

73.19

36.28

87.14

40.31

97.90

43.81

107.59

46.12

118.35

48.88

133.73

52.80

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

44

9.4 MGBT-F180W/PN1

Cooling:

Chilled water

outlet temp.

Ambient temp.(℃)

21.00

25.00

30.00

35.00

40.00

46.00

52.00

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

5.00

201.52

52.05

189.75

53.66

179.01

55.32

169.20

57.03

158.54

59.88

145.86

62.88

131.27

66.02

6.00

208.32

52.86

195.98

54.50

184.71

56.18

174.42

57.92

163.61

60.81

150.68

63.85

135.76

67.05

7.00

215.60

53.94

202.63

55.61

190.80

57.33

180.00

59.10

169.02

62.06

155.84

65.16

140.56

68.42

8.00

222.26

55.56

208.70

57.28

196.33

59.05

185.04

60.87

173.94

63.92

160.54

67.11

144.97

70.47

9.00

228.53

56.10

214.38

57.83

201.48

59.62

189.72

61.46

178.53

64.54

164.96

67.76

149.12

71.15

10.00

237.19

56.94

222.30

58.70

208.73

60.51

196.36

62.39

184.97

65.51

171.10

68.78

154.84

72.22

11.00

243.81

57.50

228.28

59.28

214.15

61.11

201.27

63.00

189.80

66.15

175.75

69.46

159.23

72.93

12.00

249.38

58.34

233.29

60.14

218.64

62.00

205.29

63.92

193.80

67.12

179.65

70.47

162.94

74.00

13.00

253.84

58.81

237.23

60.63

222.13

62.50

208.37

64.43

196.91

67.66

182.74

71.04

165.92

74.59

14.00

260.15

59.22

242.91

61.05

227.23

62.93

212.96

64.88

201.46

68.13

187.15

71.53

170.12

75.11

15.00

263.49

59.51

245.79

61.35

229.71

63.24

215.09

65.20

203.69

68.46

189.43

71.88

172.38

75.48

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

45

Heating:

Hot water

outlet temp.

Ambient temp.(℃)

-10

-6

-2 2 7

10

13

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

Capacity

Power

(℃)

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

KW

40.00

121.21

37.35

151.51

42.45

178.24

47.16

198.05

51.27

215.27

53.96

241.10

57.20

277.27

61.78

41.00

117.13

38.12

146.60

43.31

172.67

48.13

192.07

52.31

209.00

55.07

233.66

58.37

268.24

63.04

42.00

113.75

38.89

142.54

44.20

168.09

49.11

187.18

53.38

203.90

56.19

227.56

59.56

260.78

64.33

43.00

111.00

39.69

139.27

45.10

164.43

50.11

183.31

54.47

199.90

57.34

222.69

60.78

254.76

65.64

44.00

108.85

40.50

136.75

46.02

161.64

51.13

180.41

55.58

196.95

58.51

219.01

62.02

250.11

66.98

45.00

107.28

41.32

134.94

46.96

159.69

52.18

178.43

56.72

195.00

59.70

216.45

63.28

246.75

68.34

46.00

105.18

41.74

132.46

47.43

156.95

52.70

175.56

57.28

192.08

60.30

212.82

63.91

242.19

69.03

47.00

102.07

42.57

128.71

48.38

152.69

53.75

170.98

58.43

187.27

61.50

207.12

65.19

235.29

70.41

48.00

98.04

43.85

123.79

49.83

147.02

55.37

164.82

60.18

180.72

63.35

199.51

67.15

226.25

72.52

49.00

92.70

45.60

117.20

51.82

139.35

57.58

156.40

62.59

171.68

65.88

189.19

69.83

214.17

75.42

50.00

86.73

47.88

109.79

54.41

130.70

60.46

146.86

65.72

161.38

69.18

177.52

73.33

200.60

79.19

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

46

10 Exploded view

10.1 MGCT-F30W/PN1

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

47

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

48

No.

Part Name

Qty

No.

Part Name

Qty

1

Net

2

23.7

Wire joint,11p

1

2

Right seal plate condenser components D

1

23.8

Wire joint,4p

1

3

Tube heat exchanger

1

23.9

Wire joint

1

4

A seal plate condenser components of the
right

1

23.10
Terminal block

3

5

B-I input tube assemblies

1

23.11

Compressor capacitor

1

6

A machine control components II input

1

24

Base ass'y

1

7

A machine control component input I

1

25

Base

1

8

B components of the left seal plate
condenser

1

26

Fixed compressor(Copeland)

2

9

A machine component output tube casing

1

27

Drainage pan holder

2

10

A four-way valve assembly machine

1

29

The door of electrical box

1

11

Enter the pipe component II B

1

30

Welding parts water tray

1

12

B unit 4-way valve ass'y

1

31

A condenser components

1

13

Suction pipe ass'y A

1

32

Cover

1

14

Suction pipe ass'y B

1

33

C components of the left seal plate
condenser

1

15

Support board

2

34

Part B condenser

1

16

Cover

1

35

Motor holder

2

17

Cover board

1

36

Side sealed board

7

18

The welding part of small baseplate

1

37

Clapboard supporting board

3

19

Accumulator cylinder

2

38

Motor bracket bonding parts

2

20

Fixed compressor(Copeland)

2

39

Cover

2

21

Base ass'y

1

40

Asynchronous motor

1

22

Base

1

41

Axial flow fan

1

23

Outdoor electrical box ass'y

1

42

Top cover

1

23.1

Electrical box welding part

1

43

Middle partition plate

1

23.2

Outdoor current detection board ass'y

1

44

Top cover

1

23.3

Outdoor main board ass'y

1

45

Sealed board

1

23.4

Relay

2

46

Rear Cover

1

23.5

Contactor

2

47

Front cover

1

23.6

Transformer

1

48

About clapboard

2

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

49

MGCT-D30W/PN1

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

50

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

51

No.

Part Name

Qty

No.

Part Name

Qty

1

Net

2

23.7

Wire joint,11p

1

2

Right seal plate condenser components D

1

23.8

Wire joint,4p

1

3

Tube heat exchanger

1

23.9

Wire joint

1

4

A seal plate condenser components of the right

1

23.10

Wire joint

3

5

B-I input tube assemblies

1

23.11

Compressor capacitor

1

6

A machine control components II input

1

24

Fixed compressor(Copeland)

1

7

A machine control component input I

1

25

Drainage pan holder

2

8

B components of the left seal plate condenser

1

26

The door of electrical box

1

9

A machine component output tube casing

1

27

Welding parts water tray

1

10

A four-way valve assembly machine

1

29

A condenser components

1

11

Enter the pipe component II B

1

30

Cover

1

12
B unit 4-way valve ass'y

1

31

C components of the left seal
plate condenser

1

13

Suction pipe ass'y A

1

32

Part B condenser

1

14

D machine back to the tube components

1

33

Motor holder

2

15

Support board

2

34

Compressor's cover

1

16

Cover

1

35

Side sealed board

7

17

Compressor's cover

1

36

Clapboard supporting board

3

18

The welding part of small baseplate

1

37

Motor bracket bonding parts

2

19

Accumulator cylinder

2

38

Cover

2

20

Digital compressor(Copeland)

1

39

Asynchronous motor

1

21

Base ass'y

1

40

Axial flow fan

1

22

Base

1

41

Top cover

1

23

Outdoor electrical box ass'y

1

42

Middle partition plate

1

23.1

Electrical box welding part

1

43

Top cover

1

23.2

Outdoor current detection board ass'y

1

44

Sealed board

1

23.3

Outdoor main board ass'y

1

45

Rear Cover

1

23.4

Relay

2

46

Front cover

1

23.5

Contactor

2

47

About clapboard

2

23.6

Transformer

1

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

52

10.2 MGBT-F60W/PN1

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

53

No.

Part Name

Qty

No.

Part Name

Qty

1

A combination of pieces of fixed plate
condenser

1

23

Vapor-liquid separator

2

2

Condenser side board

2

24

Shell and tube evaporator

1

3

Condenser ass'y A

1

25

Cover

1

4

Condenser ass'y B

1

26

Pole 4 5

Mid horizontal support

2

27

Electronic control box door

1 6 Fixed board

2

28

A unit suction pipe II

1 7 Mid upright support

2

29

B unit suction pipe ass'y

1

8

Pipe fixing clamp

2

30

A four-way valve assembly
machine

1

9

Evaporator input pipe ass'y

1

31

B unit four-way valve ass'y

1

10

Evaporator input pipe ass'y

1

32

Drainage pan ass'y

1

11

Cover

1

33

Middle partition plate

2

12

Cover

1

34

Net 2 13

Triangle reinforcement ass'y

8

35

Net 4 14

Reinforcement board

4

36

Top upright support

2

15

Base

1

37

Condenser seal connector

1

16

Compressor

2

38

Top cover

2

17

Cover

1

39

Axial flow fan

2

18

Wiring terminal fixing board

1

40

Motor

2

19

Cover

1

41

Mid horizontal support

2

20

Cover

1

42

Motor bracket ass'y

4

21

Outdoor unit electrical box ass'y

1

43

Motor mounting plate welded

2

21.1

Welding together pieces of electronic control
box

1

44

Condenser seal connector

1

21.2

Supporting board ass'y of wire joint

1

45

Temperature-kit card

1

21.5

21.4

21.6

21.7

21.8

21.9

21.10

21.11

21.12

21.13

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

54

No.

Part Name

Qty

No.

Part Name

Qty

21.3

Electric installation board

1

46

Suction pipe ass'y A

1

21.4

Current detection board ass'y of outdoor unit

1

47

Electronic expansion valve coil

2

21.5

Outdoor main control board ass'y

1

48

Discharge temp sensor

2

21.6

Relay

3

49

Room temp sensor ass'y T41

1

21.7

AC contactor

2

50

Coil temp. sensor ass'y

2

21.8

AC contactor

2

51

Temp.sensor ass'y

1

21.9

Transformer

1

52

Coil temp sensor ass'y

3

21.10

Wire joint,11p

1

53

Electrical heating belt
compression

2

21.11

Wire joint,4p

1

54

4-Ways valve solenoid

2

21.12

Wire joint

1

55

R410A

13

21.13

Wire joint

3

56

Total water temperature mouth
components

1

22

Wiring trough

0.5

10.3 MGBT-F120W/PN1

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

55

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

56

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

57

No.

Part Name

Qty

No.

Part Name

Qty

1

The top beam

2

29

I left panel

3

2

The condenser seal fittings. II

2

30

B2 machine evaporator inlet pipe assembly

1

3

Iron nets fixed plate. II

2

31

A2 machine evaporator inlet pipe assembly

1

4

Protect net around

4

32

B1 Evaporator inlet pipe assembly machine

1

5

pole

4

33

A1 machine evaporator inlet pipe assembly

1

6

Trough fixation plate

4

34

B1 machine four-way valve assembly

1

7

Left right panel by. II

1

35

A1 Machine four-way valve assembly

1

8

Iron nets fixed board I

2

36

Fixed plate

4

9

Protect network and

4

37

Pipe fixing clamp

6

10

In the frame beams

2

38

Welding parts water tray

2

11

Cover

1

39

Seal plate condenser

4

12

Outdoor electric box ass'y

1

40

A condenser components

2

12.1

Welding together pieces of electronic
control box

1

41

A combination of pieces of fixed plate
condenser

2

12.2

Outdoor current detection board
ass'y

1

42

Motor bracket bonding parts

8

12.3

Outdoor main board ass'y

2

43

Motor

4

12.4

Relay

6

44

Axial flow fan

4

12.5

AC contactor

4

45

Fixed plate with the condenser B

2

12.6

AC contactor

4

46

B condenser components

2

12.7

Transformer

1

47

A1 machine to take over the evaporator
component four-way valve

1

12.8

Transformer

1

48

4-way valve ass'y of B2 unit

1

12.9
A Terminal Block

1

49

B2 machines take over the four-way valve
assembly evaporator

1

12.10

A Terminal Block

3

50

A2 machine back to the tube components

1

12.11

Wire joint,11p

1

51

B1 machine back to the tube components

3

12.12

Wire joint,4p

1

52

A2 four-way valve assembly machine

1

12.13

Wire joint

6

53

I sealed connector condenser

2

13

Electronic control box cover plate

1

54

Roof rack beams II

1

14

Cover

1

55

Top cover

4

15

Cover

1

56

I beam roof rack

1

16

Cover

1

57

Vertical beam roof rack

2

17

Base weld parts

1

58

Total water temperature mouth components

1

18

Compressor

4

59

Accessory- wired controller(English)

1

19

Storage tank bottom II weld
installation

1

60

Coil temp sensor ass'y

2

20

Compressor installed base II weld

1

61

Pipe temperature sensor assemblies

1

21

Reinforcement board

4

62

Pipe temperature sensor assemblies

3

22

Triangle reinforcement ass'y

8

63

Coil temp sensor ass'y

4

23

Piping support-unit

2

64

Room temp sensor ass'y T41

2

24

Vapor-liquid separator

4

65

Pipe temperature sensor assemblies

1

25

Shell and tube evaporator

1

66

Discharge temperature controller

4

26

Storage tank bottom I weld parts
installation

1

67
Four-way valve coil

2

27

Compressor installed base I weld

1

68

Four-way valve coil

2

28

Vertical beams in the frame

2

69

Electronic expansion valve coil

4

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

58

10.4 MGBT-F180W/PN1

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

59

No.

Part Name

Qty

No.

Part Name

Qty

1

Column

4

35

Tube fixed plate II

2

2

About the protective screen

4

36

Welding parts water tray

3

3

Network Rail fixed plate II

2

37

In lane bridge II

2

4

Vertical beam in the frame

2

38

Tube fixed plate III

12

5

Roof rack crossbar

2

39

Evaporator tube assembly output

1

6

I sealed connector condenser

3

40

Evaporator tube assembly output

1

7

Vertical beam roof rack

2

41

Evaporator tube assembly output

1

8

Condenser sealed connector II

3

42

I four-way valve assembly

1

9

Roof rack beam welding parts

2

43

Four-way valve assembly III

1

10

Top cover

6

44

Evaporator tube assembly output

1

11

Rear Panel II

1

45

Evaporator tube assembly output

1

12

Condenser output tube II

3

46

Evaporator tube assembly output

1

13

In lane bridge I

2

47

Welding together pieces of the base

1

14

Block I installed electronic
control box

2

48
Left panel II

1

15

Block III electronic control box
installed

2

49
Strengthened beams II

2

16

Rear Panel I

1

50

I left panel

3

17

Block II Electronic Control Box
Installation

2

51
Panel fasteners II

8

18

Electronic control box cover
panel B

1

52
Triangular reinforcement

12

19

Air-cooled electronic control box
assembly module

1

53
Trunking II

1

19.1

Welding together pieces of
electronic control box

1

54
II trunking cover

1

19.2

Electrical component mounting
plate I

1

55

Four-way valve assembly Ⅳ

1

19.3

Electrical component mounting
plate II

1

56
Enter the evaporator tube assembly

1

19.4

Contactor

6

58

Enter the evaporator tube assembly

1

19.5

Wire joint

1

59

I output tube condenser

3

19.6
Wire joint

8

60

Output tube condenser (C drive)
transition tube assemblies

1

19.7

Three-phase power protection
devices

3

61

Condenser output tube (D drive)
transition tube assemblies

1

19.8

Transformer

2

62

Tube fixed plate Ⅳ

1

19.9

Outdoor control board assembly

3

63

Shell and tube evaporator

1

19.10

AC contactor

6

64

Duct I

1

19.11

A Terminal Block

1

65

I cover trunking

1

19.4

19.5

19.6

19.7

19.8

19.9

19.10

19.11

19.12

19.13 19.14

19.15

19.16

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

60

No.

Part Name

Qty

No.

Part Name

Qty

19.12

Seven Terminal Block

1

68

Four-way valve assembly II

3

19.13

Transformer

1

69

separator

6

19.14

A Terminal Block

3

70

The beams in the

2

20

A cover board electronic control

1

71

Front Panel

4

21

Components of the compressor
back to the trachea

5

72
Strengthen the beam I

4

22

I return to the trachea
compressor components

1

73
Network Rail fixed plate I

4

23

I return to the trachea
compressor components

1

74
Front grille

6

26
Part B condenser

3

75

Welding parts mounting base
compressors

6

27

B fixed plate with pieces of
condenser

3

76
Compressor

6

28

Axial flow fan

6

77

Enter the evaporator tube assembly

1

29

Motor

5

78

I fixed plate throttle parts

2

30

Three-phase asynchronous
motor

1

79
Enter the evaporator tube assembly

1

31

Motor bracket bonding parts

12

80.1

Electronic expansion valve

1

33

A fixed plate with pieces of
condenser

3

80.1
Enter the evaporator tube assembly

1

34

A machine Condenser Parts

3

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

61

11 Trouble shooting

11.1 Failure & Protection Codes

30kW module

No

Code

Trouble

1

E0

Error of outdoor EEPROM

2

E1

Power phase sequence error

3

E2

Communication error

4

E3

Total water outlet temperature sensor error

5

E4

Outlet water temp sensor error

6

E5

Pipe temperature sensor error in condenser A

7

E6

Pipe temperature sensor error in condenser B

8

E7

Outdoor ambient temperature sensor error

9

E8

Output of the power protector error

10

E9

Water flow detection error(manual recovery)

11

EA

(Reserved failure code)

12

Eb

Freeze-proof temperature sensor error in double pipe exchanger

13

EC

Wired controller detected that the units on-line have decreased

14

Ed

(Reserved failure code)

15

EF

Inlet water temperature sensor error

16

P0

High pressure or air discharge temperature protection in system A (manual recovery)

17

P1

Low pressure protection in system A (manual recovery)

18

P2

High pressure or air discharge temperature protection in system B (manual recovery)

19

P3

Low pressure protection in system B (manual recovery)

20

P4

Current protection in system A (manual recovery)

21

P5

Current protection in system B(manual recovery)

22

P6

Condenser high temperature protection in system A

23

P7

Condenser high temperature protection in system B

24

P8

(Reserved failure code)

25

P9

Protection of outlet and inlet water temperature difference

26

PA

Low ambient temperature drive-up protection

27

Pb

System freeze-proof protection

28

PC

Anti-freezing pressure protection in system A (manual recovery)

29

Pd

Anti-freezing pressure protection in system B (manual recovery)

30

PE

Low-temperature protection of evaporator (manual recovery)

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

62

60kW module

No

Code

Trouble

1

E0

Error of outdoor EEPROM

2

E1

Power phase sequence error

3

E2

Communication error

4

E3

Total water outlet temperature sensor error

5

E4

Outlet water temp sensor error

6

E5

Pipe temperature sensor error in condenser A

7

E6

Pipe temperature sensor error in condenser B

8

E7

Outdoor ambient temperature sensor error

9

E8

Output of the power protector error

10

E9

Water flow detection error(manual recovery)

11

EA

(Reserved failure code)

12

Eb

Freeze-proof temperature sensor error in shell and tube exchanger

13

EC

Wired controller detected that the units on-line have decreased

14

Ed

(Reserved failure code)

15

EF

Inlet water temperature sensor error

16

P0

High pressure or air discharge temperature protection in system A (manual recovery)

17

P1

Low pressure protection in system A (manual recovery)

18

P2

High pressure or air discharge temperature protection in system B (manual recovery)

19

P3

Low pressure protection in system B (manual recovery)

20

P4

Current protection in system A (manual recovery)

21

P5

Current protection in system B(manual recovery)

22

P6

Condenser high temperature protection in system A

23

P7

Condenser high temperature protection in system B

24

P8

(Reserved failure code)

25

P9

Protection of outlet and inlet water temperature difference

26

PA

Low ambient temperature drive-up protection

27

Pb

System freeze-proof protection

28

PC

Anti-freezing pressure protection in system A (manual recovery)

29

Pd

Anti-freezing pressure protection in system B (manual recovery)

30

PE

Low-temperature protection of evaporator (manual recovery)

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

63

120kW module

No

Code

Trouble

1

E0

Error of outdoor EEPROM

2

E1

Power phase sequence error

3

E2

Communication error

4

E3

Total water outlet temperature sensor error

5

E4

The unit outlet water temp sensor error

6

E5

Pipe temperature sensor error in condenser A

7

E6

Pipe temperature sensor error in condenser B

8

E7

Outdoor ambient temperature sensor error

9

E8

Output of the power protector error

10

E9

Water flow detection error(manual recovery)

11

EA

(Reserved failure code)

12

Eb

Freeze-proof temperature sensor error in shell and tube exchanger

13

EC

Wired controller detected that the units on-line have decreased

14

Ed

(Reserved failure code)

15

EF

Inlet water temperature sensor error

16

P0

High pressure or air discharge temperature protection in system A (manual recovery)

17

P1

Low pressure protection in system A (manual recovery)

18

P2

High pressure or air discharge temperature protection in system B (manual recovery)

19

P3

Low pressure protection in system B (manual recovery)

20

P4

Current protection in system A (manual recovery)

21

P5

Current protection in system B(manual recovery)

22

P6

Condenser high temperature protection in system A

23

P7

Condenser high temperature protection in system B

24

P8

(Reserved failure code)

25

P9

Protection of outlet and inlet water temperature difference

26

PA

Low ambient temperature drive-up protection

27

Pb

System freeze-proof protection

28

PC

Anti-freezing pressure protection in system A (manual recovery)

29

Pd

Anti-freezing pressure protection in system B (manual recovery)

30

PE

Low-temperature protection of evaporator (manual recovery)

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

64

180kW module

No

Code

Trouble

1

E0

Error of outdoor EEPROM

2

E1

Power phase sequence error

3

E2

Communication error

4

E3

Total water outlet temperature sensor error

5

E4

The unit outlet water temp sensor error

6

E5

Pipe temperature sensor error in condenser A

7

E6

Pipe temperature sensor error in condenser B

8

E7

Outdoor ambient temperature sensor error

9

E8

Output of the power protector error

10

E9

Water flow detection error(manual recovery)

11

EA

(Reserved failure code)

12

Eb

Freeze-proof temperature sensor error in shell and tube exchanger

13

EC

Wired controller detected that the units on-line have decreased

14

Ed

(Reserved failure code)

15

EF

Inlet water temperature sensor error

16

P0

High pressure or air discharge temperature protection in system A (manual recovery)

17

P1

Low pressure protection in system A (manual recovery)

18

P2

High pressure or air discharge temperature protection in system B (manual recovery)

19

P3

Low pressure protection in system B (manual recovery)

20

P4

Current protection in system A (manual recovery)

21

P5

Current protection in system B(manual recovery)

22

P6

Condenser high temperature protection in system A

23

P7

Condenser high temperature protection in system B

24

P8

(Reserved failure code)

25

P9

Protection of outlet and inlet water temperature difference

26

PA

Low ambient temperature drive-up protection

27

Pb

System freeze-proof protection

28

PC

Anti-freezing pressure protection in system A (manual recovery)

29

Pd

Anti-freezing pressure protection in system B (manual recovery)

30

PE

Low-temperature protection of evaporator (manual recovery)

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

65

11.2 Troubles and Solutions

Troubles

Possible reasons

Solutions

Over high air discharge
pressure(Cooling
operation).

Air or other non-condensing gas still in the
system.

Discharge gas from refrigerant charging inlet.
Re-vacuum the system if necessary.

Fins in the condenser are dirty or foreign
substance blocking fins.

Clean condenser fins.

Insufficient chilling air volume or condenser fan
error.

Check and repair the condenser fan, recover the
normal operation.

Excessive high air suction pressure.

See “Excessive high air suction pressure”.

Excessive refrigerant charging volume.

Discharge the excessive refrigerant.

Over high ambient temperature.

Check ambient temperature.

Over low air discharge
pressure (Cooling
operation).

Surrounding temperature is lower.

Measure the surrounding temp.

Refrigerant leak or insufficient.

Leak-hunting or recharging.

Low suction pressure.

Refer to the “low suction pressure”.

Over high air suction
pressure (Cooling
operation).

Refrigerant over-charged.

Discharge the additional refrigerant.

High temperature of the inlet chilled-water.

Check the heat insulation of water pipeline.

Over low air suction
pressure (Cooling
operation).
Insufficient water flow.

Measure the Temp difference between inlet and outlet
water, adjust the water flow.

Low temperature of inlet chilled-water.

Check installation.

Refrigerant leak or insufficient.

Leak-hunting or recharging.

Scaling in the evaporator.

Descaling.

Over high air discharge
pressure (Heating
operation).

Insufficient water flow.

Check temperature difference at water inlet and
outlet, and adjust the water flow volume.

Air or other non-condensing gas still in the
system.

Discharge gas from refrigerant charging inlet.
Re-vacuum the system if necessary.

Scaling in water side of heat exchanger.

Descaling.

Over high temperature in chilling water inlet.

Check water temperature.

Excessive high air suction pressure.

See “Excessive high air suction pressure”.

Over low air discharge
pressure (Heating
operation).

Over low temperature of chilling water.

Check chilling water temperature.

Refrigerant leakage or insufficient refrigerant
volume.

Test leakage or charge sufficient refrigerant to the
system.

Excessive low air suction pressure.

See “Excessive low air suction pressure”.

Over high air suction
pressure (Heating
operation).

Over heat air in the side of air heat exchanger.

Check ambient temperature around it.

Excessive refrigerant charging volume.

Discharge the excessive refrigerant.

Over low air suction
pressure (Heating
operation).

Insufficient refrigerant charging volume.

Charge sufficient refrigerant to the system.

Insufficient air flow volume.

Check fan rotating direction.

Air loop short-circuit.

Reason about remove air short-circuit.

Insufficient frost-removal operation.

Error comes out from 4-way valve or thermal resistor.
Replace a new one if necessary.

Compressor stops
because of freeze-proof
protection (Cooling
operation).

Insufficient chilling water flow volume.

Error comes from pump or flow-type water volume
control. Check and repaired or replace a new one.

Gas still in water loop.

Discharge air.

Thermal resistor error.

Upon error have been confirmed, please replace a
new one.

Compressor stops
because of high pressure
protection.

Over high air expelling pressure.

See “Over high air expelling pressure”.

High pressure switch error.

Upon error have been confirmed, please replace a
new one.

Compressor stops
because of motor
overload.

Over high air expelling pressure and air suction
pressure.

See “Over high air expelling pressure” and “Over high
air suction pressure”.

High voltage or low voltage, signal phase or
phase unbalance.

Confirm voltage not higher or lower than the rated
voltage 10%.

Short circuit comes out from motor or connecting
interface.

Confirm resistors at motor are connected
corresponding to terminals.

Overload assembly error.

Replace a new one.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

66

Troubles

Possible reasons

Solutions

Compressor stops
because of integrate
temperature sensor or air
discharge temperature
protection.

Over high or over low voltage.

Confirm voltage not higher or lower than the rated
voltage 10%.

Over high air expelling pressure or excessive
low air suction pressure.

See “Over high air expelling pressure” and “excessive
low air suction pressure ”.

Component error.

Check the integrated temperature sensor after motor
is cool down.

Compressor stops
because of low pressure
protection.

Filter in front (or rear) of expanding valve is
blocked.

Replace a new filter.

Low voltage switch error.

If the switch is defective, please replace a new one.

Excessive low air suction pressure.

See “Excessive low air suction pressure”.

Abnormal noise comes
from compressor.

Liquid refrigerant flows into compressor from
evaporator result in liquid slugging.

Adjust refrigerant charge volume.

Aging of compressor.

Replace a new compressor.

Compressor can’t start.

Over current relay trip up, fuse burnt out.

Replace damaged assembly.

Control circuit without power though.

Check the wring of control system.

High voltage or low voltage protection.

Reference to mention in above the parts of air suction
and discharge pressure error.

Coils in contactor are burnt out.

Replace damaged assembly.

Wrong connection of phase sequence.

Re-connect and adjust the any 2 wires among 3
phases.

Water system error and flow type volume
controller short connection.

Check water system.

Error signal delivered from wired controller.

Find out the error type and carry out the
corresponding measure to settle.

Air side heat exchanger
excessive frost.

4-way valve or thermal resistor error.

Check the running state. Replace a new one if
necessary.

Air loop short-circuit.

Settle the short-circuit of air discharge.

With noise.

Fixing screws at panel are loosen.

Fix up all assemblies.

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

67

11.3 Typical malfunction solutions

1) High pressure and discharged temperature protection

Yes

No

No

Yes

Yes

Yes

Yes

Yes

High pressure and
discharged

No

No

Yes

Yes

Yes

Yes

No

No

No

No

High pressure
protection.

Blower stops rotating or rotates in
reversed direction in cooling mode;
water pump is not open or the flow.

EXV cannot start running.

Pressure controller is broken
or the joint is loose.

Fin heat exchanger in cooling mode is
too dirty or aged; or too heavy
encrustation in shell-tube for heating.

EXV, capillary and filter are
dirty, blocking.

Discharged temp.
protection.

See the analysis of
discharge temp. protection
malfunction.

Inspect fan motor and
capacitor (1phase) or
start up the water pump.

Replace EXV or coil.

Replace press controller,
fixed joint.

Clean heat exchanger.

Replace EXV, capillary
and filter.

There is air and filled refrigerant
too much in system.(Generally
occur after maintenance.)

PCB make mistakes to
alarm.

Empty, vacuuming and
append refrigerant if
necessary.

Check if it happened
frequently, if yes, please
replace PCB.

Inform the customer
service center.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

68

2) Low pressure protection

Low pressure protection.

No

Discharge temp. protection

Discharge temp. switch is
broken or joint is loose.

Yes

Yes

Replace discharge temp.
switch, fixed joint.

Yes

Yes

Yes

Yes

No

No

No

No

Detect leakage for all
system, append
refrigerant.

Refrigerant is too less.

Replace the EXV or coil.

Cause of dirty and
blocked, replace the
EXV, capillary and filter.
Vacuuming and append

Check if happened
frequently, if yes, please
replace PCB.

EXV cannot be opened.

The EXV, capillary and filter
are dirty, blocked and ice
blocked.

PCB mistakes to alarm.

Inform the customer
service center.

Refrigerant is too less.

Inspect leakage in system,
append refrigerant.

Replace the EXV and coil.

Cause of dirty and blocked,
replace the EXV, capillary and
filter. Vacuuming and append
refrigerant if ice blocked.

Inspect if the water flow is
normal, refer to the water flow
malfunction to analysis.

EXV cannot be opened.

The EXV, capillary and filter are
dirty, blocked and ice blocked.

The pressure controller is
broken or joint is loose.

Anti-freezing lower pressure
protection.

Inform the customer service
center.

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

Replace the pressure
controller, fixed joint.

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

69

2) Current protection

3) High temperature protection of condenser

High temp. protection of
condenser.

Yes

Clean heat exchanger.

Check the fan motor,
capacitor (1 phase) or
start up water pump.

Empty, vacuuming and
append refrigerant if

Check power supply,
start up the unit after
normal power supply.

Replace PCB.

Inform the customer service
center.

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

Abnormal power supply.

Air is in system, filled in too
much refrigerant(Generally
happened after maintenance.)

PCB mistakes to alarm.

Yes

Yes

The fin of heat exchanger is
dirty or aged in cooling mode.

Clean heat exchanger.

Replace PCB.

Replace temp. sensor.

Check the fan motor,
capacitor (1 phase).

Replace installation
position of unit.

PCB mistakes to alarm.

No

The installation position of unit
results in bad heat transfer of
condenser.

Yes

Yes

Yes

Yes

No

In cooling mode, the fan motor
stop running, reversal and run
slowly.

The temp. sensor of condenser

bring drifting when collect
temp.

No

No

No

Inform the customer service
center.

Current protection

The fin of heat exchanger is
dirty or aged in cooling mode,
or the shell-tube scaled
strong.

The fan motor stopped
running in cooling mode,
reversal and run slowly. The

water pump didn’t start up or

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

70

4) Inlet &outlet water temperature difference protection

5) Low ambient temperature starting up protection

6) Low temperature anti-freezing protection of cooling evaporator

Inlet &outlet water temp.
difference protection.

Low temp. anti-freezing
protection of cooling

Inform the customer service center.

Yes

Replace PCB.

Replace temp. sensor.

Refer to the water flow
malfunction to analysis.

Yes

Yes

Yes

No

No

No

Water flow is lower.

The outlet water temp. sensor

or inlet water temp. sensor
brought drifting when collect

PCB mistakes to alarm.
Replace temp. sensor.

Replace PCB.

Inform the customer service
center.

PCB mistakes to alarm.

Yes

Yes

Yes

Yes

No

No

Water flow is slow.

Yes

Refer to the water flow
malfunction to analysis.

Replace temp. sensor.

Replace PCB.

Anti-freezing temp. sensor of
cooling evaporator brought

Yes

PCB mistakes to alarm.

Inform the customer service
center.

No

No

No

Low ambient temp. starting
protection in cooling mode.

Yes

Ambient temp. sensor brought
drifting when collect temp.

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

71

7) Power supply phase sequence malfunction

8) Communication malfunction

Power supply phase sequence
malfunction.

Communication malfunction

Yes

Inform the customer service
center.

Phase sequence error.

Lack of phase.

Phase lack protector is broken.

PCB mistakes to alarm.

No

Yes

Adjust connecting wire.

No

No

No

Yes

Check power supply.

Yes

Yes

Replace phase lack
protector.

Replace PCB.

Inform the customer service
center.

No power input to unit or wired
controller.

Communicating wire malfunction.

Address repeat.

PCB mistakes to alarm.

The attachments of unit have strong
electromagnetic interference.

Replace PCB.

Yes

Inspect power supply.

Yes

Yes

Inspect communicating
wire.

Adjust address.

Yes

Yes

Yes

Reduce electromagnetic
interference.

No

No

No

No

No

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

72

9) Water flow detection malfunction

Water flow detection malfunction

Yes

Yes

Water pump didn’t open or error.

Valve is not opened in system.

No

The water flow detection switch
error.

Inform the customer service
center.

PCB mistakes to alarm.

The water flow switch installed
out of criterion, result in mistaking
work.

Selected the capacity of water
pump is less (flow & head).

Designed the water pipe inner
dimension is too less.

Open the pump or change;
inspect the power supply or
control circuit of pump.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Open the valve.

Replace the water flow switch,
inspect the connecting wire.

Adjust the installation
position.

Replace water pump.

Replace water pipe.

Remove superfluous valve
or forced it is always on.

The filter or water pipe is dirty, the
shell-tube heat exchanger scaled.

Clean filter, water pipe,
shell-tube heat exchanger.

Air is in water.

Empty.

Yes

Replace PCB.

No

No

No

No

No

No

No

No

No

Installed the 2-way valve quantity
is more than 50% of indoor unit

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

73

10) Total outlet water temperature sensor malfunction

11) The unit outlet water temperature sensor malfunction

Total outlet water temp. sensor
malfunction

The unit outlet water temp. sensor

The circuit of total outlet water temp.
sensor is broken.

Inform the customer service center.
PCB mistakes to alarm.

The circuit of total outlet water
temp. sensor is shorten.

Replace PCB.

Fixed joint.

Replace temp. sensor.

Replace temp. sensor.

The joint of total outlet water
temp. sensor is loose.

Inform the customer service
center.

PCB mistakes to alarm.

The unit’s circuit of outlet water

Replace PCB.

Replace temp. sensor.

The unit’s circuit of outlet water

Replace temp. sensor.

The unit’s joint of outlet water

Fixed joint.

Yes

No

No

No

No

Yes

Yes

Yes

Yes

No

No

No

No

Yes

Yes

Yes

Yes

Yes

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

74

12) The unit inlet water temperature sensor malfunction

13) Pipe temperature sensor of condenser malfunction

The unit inlet water temp. sensor

Inform the customer service
center.

PCB mistakes to alarm.

The unit’s circuit of inlet water

Replace PCB.

Replace temp. sensor.

The unit’s circuit of inlet water

Replace temp. sensor.

The unit’s joint of inlet water temp.

Fixed joint.

No

Yes

Yes

Yes

Yes

Yes

No

No

No

Pipe temp. sensor of condenser

Inform the customer service
center.

PCB mistakes to alarm.

The circuit of condenser’s pipe

Replace PCB.

Replace temp. sensor.

The circuit of condenser’s pipe

Replace temp. sensor.

The joint of condenser’s pipe

Fixed joint.

No

Yes

Yes

Yes

Yes

Yes

No

No

No

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

75

14) Ambient temperature sensor malfunction

Ambient temp. sensor

Inform the customer service
center.

PCB mistakes to alarm.

The circuit of ambient temp.
Replace PCB.

Replace temp. sensor.

The circuit of ambient temp.

Replace temp. sensor.

The joint of ambient temp. sensor
Fixed joint.

No

Yes

Yes

Yes

Yes

Yes

No

No

No

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

76

12 Installation

12.1 Unit Installation

12.1.1 Transportation

The angle of inclination should not be more than 15º when carrying the unit, to avoid overturn of the unit.
a. Rolling handling: several rolling rods of the same size are placed under the base of the unit, and the
length of each rod must be more than the outer frame of the base and suitable for balancing of the unit.
b. Lifting: the strength lifting rope (belt) can bear should be 4 times the weight of the unit. Check the lifting
hook and ensure that it is firmly attached to the unit, and the lifting angle should be more than 60º. To avoid
damages to the unit, the contact position of the unit and lifting rope should be provided with an at least
50mm thick wood block, cloth or hard paper. Any person is not allowed to stand below the unit when lifting it.

Liftingangle

The position should be provided with an at
least 50mm thick wood block, cloth or hard
paper, to avoid damages to the unit.

Inform the customer
service center.

Ambient temp.
sensor malfunction

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

77

120kW module

180kW module

Lifting angle

The position should be provided with an at

least 50mm thick wood block, cloth or hard

paper, to avoid damages to the unit.

The position should be
provided with an at least
50mm thick wood block,
cloth or hard paper, to
avoid damages to the unit.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

78

12.1.2 Installation space

● Requirements of arrangement space of the unit

1) To ensure adequate airflow entering the condenser, the influence of descending airflow caused by the
high-rise buildings around upon the unit should be taken into account when installing the unit.

2) If the unit is installed where the flowing speed of air is high, such as on the exposed roof, the measures
including sunk fence and Persian blinds can be taken, to prevent the turbulent flow from disturbing the air
entering the unit. If the unit needs to be provided with sunk fence, the height of the latter should not be more
than that of the former; if Persian blinds are required, the total loss of static pressure should be less than the
static pressure outside the fan. The space between the unit and sunk fence or Persian blinds should also
meet the requirement of the minimum installation space of the unit.

3) If the unit needs to operate in winter, and the installation site may be covered by snow, the unit should be
located higher than the snow surface, to ensure that air flows through the coils smoothly.

30kW module

60kW module

Input of airflow

Input of airflow

A

B

D

C

Input of airflowInput of airflow

E

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

79

120kW module

180kW module

Input of airflow

Input of airflow

A

B

D

C

Input of airflowInput of airflow

E

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

80

The recommend space parameter

Module

Installation space (mm)

A B C D E

MGCT-F30W/PN1

≥1500

≥2000

≥2000

≥1500

≥8000

MGCT-D30W/PN1

MGBT-F60W/PN1

MGBT-F120W/PN1

MGBT-F180W/PN1

≥2000

● Space requirements for parallel installation of multiple modular units.

To avoid back flow of the air in the condenser and operational faults of the unit, the parallel installation of
multiple modular units can follow the direction A and D as shown in the figure above, the spaces between
the unit and the obstacle are given in the figure above, and the space between adjacent modular units
should not be less than 300mm; the installation can also follow the direction B and C as shown in the figure
above, the spaces between the unit and the obstacle are given in the figure above, and the space between
adjacent modular units should not be less than 600mm; the installation can also follow the direction
combination of A and D, and B and C, the spaces between the unit and the obstacle are given in the figure
above, the space between adjacent modular units in the direction A and D should not be less than 300mm,
and the space between adjacent modular units in the direction B and C should not be less than 600mm.

If the spaces mentioned above cannot be met, the air passing from the unit to the coils may be restricted, or
back flow of air discharge may occur, and the performance of the unit may be affected, or the unit may fail to
operate.

No

Model

Max unit combined

quantity

L(mm)

M(mm)

N(mm)

1

MGCT-F30W/PN1

16

≥600

≥300

≥300

2

MGCT-D30W/PN1

16

≥600

≥300

≥300

3

MGBT-F60W/PN1

16

≥600

≥300

≥300

4

MGBT-F120W/PN1

8

≥600

≥300

≥300

5

MGBT-F180W/PN1

5

≥600

≥300

≥300

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

81

12.1.3 Installation Foundation

 The unit should be located on the horizontal foundation, the ground floor or the roof which can bear

operating weight of the unit and the weight of maintenance personnel. Refer to the operating weight
parameters in specification table.

 If the unit is located so high that it is inconvenient for maintenance personnel to conduct maintenance,

the suitable scaffold can be provided around the unit.

 The scaffold must be able to bear the weight of maintenance personnel and maintenance facilities.
 The bottom frame of the unit is not allowed to be embedded into the concrete of installation foundation.

Location drawing of installation foundation of the unit (unit: mm)

30kW module

60kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

82

120kW module

180kW module

12.1.4 Installation of damping devices

※ Damping devices must be provided between the unit and its foundation.

By means of the Φ15mm diameter installation holes on the steel frame of the unit base, the unit can be
fastened on the foundation through the spring damper. See figure above (Schematic diagram of installation
dimension of the unit) for details about center distance of the installation holes. The damper does not go with
the unit, and the user can select the damper according to the relevant requirements. When the unit is
installed on the high roof or the area sensitive to vibration, please consult the relevant persons before
selecting the damper.

※ Installation steps of the damper

Step

Content

1

Make sure that the flatness of the concrete foundation is within ±3mm, and then place the unit on the
cushion block.

2

Raise the unit to the height suitable for installation of the damping device. Remove the clamp nuts of the
damper.

3

Place the unit on the damper, and align the fixing bolt holes of the damper with the fixing holes on the unit
base.

4

Return the clamp nuts of the damper to the fixing holes on the unit base, and tighten them into the damper.

5

Adjust the operational height of the damper base, and screw down the leveling bolts. Tighten the bolts by
one circle to ensure equal height adjustment variance of the damper.

6

The lock bolts can be tightened after the correct operational height is reached.

3.5.1 Location drawing of installation foundation of the unit: (unit:

mm)

230

Drainage channel

Anchor bolt

2388

1888

80

Concrete Cement mortarDrainage channel

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

83

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

84

12.2 Water System Installation

Notice:

● After the unit is in place, chilled water pipes can be laid.

● The relevant installation regulations should be abided with when conducting connection of water pipes.

● The pipelines should be free of any impurity, and all chilled water pipes must conform to local rules and

regulations of pipeline engineering.

12.2.1 Connection requirements of chilled water pipes

a. All chilled water pipelines should be thoroughly flushed, to be free of any impurity, before the unit is
operated. Any impurity should not be flushed to or into the heat exchanger.

b. Water must enter the heat exchanger through the inlet; otherwise the performance of the unit will decline.
c. The inlet pipe of the evaporator must be provided with a target flow controller, to realize flow-break

protection for the unit. Both ends of the water flow switch must be supplied with horizontal straight pipe
sections whose diameter is 5 times that of the inlet pipe. The water flow switch must be installed in strict
accordance with “Installation & Regulation Guide for water flow switch”. The wires of the water flow switch
should be led to the electric cabinet through shielded cable. The working pressure of the water flow switch is

1.0MPa, and its interface is 1 inch in diameter. After the pipelines are installed, water flow switch will be set
properly according to the rated water flow of the unit.

d. The pump installed in the water pipeline system should be equipped with starter. The pump will directly
press water into the heat exchanger of the water system.

e. The pipes and their ports must be independently supported but should not be supported on the unit.
f. The pipes and their ports of the heat exchanger should be easy to disassemble for operation and cleaning,

as well as inspection of port pipes of the evaporator.
g. The evaporator should be provided with a filter with more than 40 meshes per inch at site. The filter

should be installed near to the inlet port as much as possible, and be under heat preservation.
h. The by-pass pipes and by-pass valves as shown in the figure of “Connection drawing of pipeline

system” must be mounted for the heat exchanger, to facilitate cleaning of the outside system of water
passage before the unit is adjusted. During maintenance, the water passage of the heat exchanger can be
cut off without disturbing other heat exchangers.

i. The flexible ports should be adopted between the interface of the heat exchanger and on-site pipeline, to
reduce transfer of vibration to the building.

j. To facilitate maintenance, the inlet and outlet pipes should be provided with thermometer or manometer.
The unit is not equipped with pressure and temperature instruments, so they need to be purchased by the
user.

k. All low positions of the water system should be provided with drainage ports, to drain water in the
evaporator and the system completely; and all high positions should be supplied with discharge valves, to
facilitate expelling air from the pipeline. The discharge valves and drainage ports should not be under heat
preservation, to facilitate maintenance.

l. All possible water pipes in the system to be chilled should be under heat preservation, including inlet pipes
and flanges of the heat exchanger.

m. The outdoor chilled water pipelines should be wrapped with an auxiliary heating belt for heat preservation,
and the material of the auxiliary heat belt should be PE, EDPM, etc., with thickness of 20mm, to prevent the
pipelines from freezing and thus cracking under low temperature. The power supply of the heating belt
should be equipped with an independent fuse.

n. When the ambient temperature is lower than 2℃, and the unit will be not used for a long time, water inside
the unit should be drained. If the unit is not drained in winter, its power supply should not be cut off, and the
fan coils in the water system must be provided with three-way valves, to ensure smooth circulation of the
water system when the anti-freezing pump is started up in winter.

o. The common outlet pipelines of combined units should be provided with mixing water temperature sensor.
Warning:

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

85

● For the water pipeline network including filters and heat exchangers, dreg or dirt may seriously damages
the heat exchangers and water pipes.

● The installation persons or the users must ensure the quality of chilled water, and de-icing salt mixtures
and air should be excluded from the water system, since they may oxidize and corrode steel parts inside the
heat exchanger.

12.2.2 Water Quality

※Water quality control

When industrial water is used as chilled water, little furring may occur; however, well water or river water,
used as chilled water, may cause much sediment, such as furring, sand, and so on. Therefore, well water or
river water must be filtered and softened in softening water equipment before flowing into chilled water
system. If sand and clay settle in the evaporator, circulation of chilled water may be blocked, and thus
leading to freezing accidents; if hardness of chilled water is too high, furring may occur easily, and the
devices may be corroded. Therefore, the quality of chilled water should be analyzed before being used, such
as PH value, conductivity, concentration of chloride ion, concentration of sulfide ion, and so on.

※ Applicable standard of water quality for the unit

PH
value

Total
hardness

Conductivity

Sulfide
ion

Chloride
ion

Ammonia
ion

Sulfate
ion

Silicon

Iron
content

Sodium ion

Calcium
ion

7～

8.5

<50ppm

<20μV/cm(25℃)

No

<50ppm

No

<50ppm

<30ppm

<0.3ppm

No
requirement

<50ppm

Performance adjustment factors

The chilled fluid must be required according to anyone condition as following:

1. The outlet water temperature is below 5oC;

2. The ambient temperature is below 0 oC;

3. Don’t start up the unit for a long time.

4. The power supply was cut off and needn’t change the water in system.

Ethylene and Propylene Glycol Factors

A glycol solution is required when the unit with condition as mentioned. The use of glycol will reduce the
performance of the unit depending on concentration.

Ethylene Glycol

Quality of glycol（%）

modification coefficient

Freezing

point ℃

Cooling capacity

modification

Power

modification

Water

resistance

Water flow

modification

0

1.000

1.000

1.000

1.000

0

10

0.984

0.998

1.118

1.019

-4.000

20

0.973

0.995

1.268

1.051

-9.000

30

0.965

0.992

1.482

1.092

-16.000

40

0.960

0.989

1.791

1.145

-23.000

Propylene Glycol

Quality of glycol

（%）

Modification coefficient

Freezing

point ℃

Cooling capacity

modification

Power

modification

Water

resistance

Water flow

modification

0

1.000

1.000

1.000

1.000

0

10

0.976

0.996

1.071

1.000

-3.000

20

0.961

0.992

1.189

1.016

-7.000

30

0.948

0.988

1.380

1.034

-13.000

40

0.938

0.984

1.728

1.078

-22.000

Units operating with glycol solutions are not included in the ARI Certification Program.

Altitude correction factors

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

86

Performance tables are based at sea level. Elevations other than sea level affect the performance of the unit.
The decreased air density will reduce condenser capacity and reduce the unit’s performance. For
performance at elevations other than sea level refer to Table 3. Maximum allowable altitude is 1800meters.

Evaporator temperature drop factors

Performance tables are based on a 5oC temperature drop through the evaporator. Adjustment factors for
applications with temperature ranges from 3 oC to 6 oC in follow table. Temperature drops outside this range
can affect the control system’s capability to maintain acceptable control and are not recommended.

Fouling factor

Fouling refers to the accumulation of unwanted material on solid surfaces, most often in an aquatic
environment. The fouling material can consist of either living organisms (biofouling) or a non-living
substance (inorganic or organic). Fouling is usually distinguished from other surface-growth phenomena in
that it occurs on a surface of a component, system or plant performing a defined and useful function, and
that the fouling process impedes or interferes with this function.

Other terms used in the literature to describe fouling include: deposit formation, encrustation, crudding,
deposition, scaling, scale formation, slagging, and sludge formation. The last six terms have a more narrow
meaning than fouling within the scope of the fouling science and technology, and they also have meanings
outside of this scope; therefore, they should be used with caution.

Fouling phenomena are common and diverse, ranging from fouling of ship hulls, natural surfaces in the
marine environment (marine fouling), fouling of heat-transfer components through ingredients contained in
the cooling water or gases, and even the development of plaque or calculus on teeth, or deposits on solar
panels on Mars, among other examples.

Foreign matter in the chilled water system will adversely affect the heat transfer capability of the evaporator,
and could increase the pressure drop and reduce the water flow. To provide optimum unit operation, proper
water treatment must be maintained. Refer to the able as following.

Fouling Factor

ALTITUDE

(m)

Difference of water
inlet and outlet temp.
(℃)

Fouling Factor

0.018℃ /kW

0.044m 2 ℃ /kW

0.086m 2 ℃/kW

0.172m 2 ℃/kW

C P C P C P C

P

Sea level

3

1.036

1.077

1.019

1.076

0.991

0.975

0.963

0.983

4

1.039

1.101

1.022

1.080

0.994

0.996

0.971

0.984

5

1.045

1.105

1.028

1.086

1.000

1.000

0.977

0.989

6

1.051

1.109

1.034

1.093

1.006

1.004

0.983

0.994

600

3

1.024

1.087

1.008

1.064

0.980

0.984

0.951

0.991

4

1.027

1.111

1.011

1.068

0.983

1.005

0.959

0.992

5

1.034

1.115

1.017

1.074

0.989

1.009

0.965

0.997

6

1.043

1.115

1.026

1.084

0.998

1.009

0.973

0.999

1200

3

1.013

1.117

0.996

1.052

0.969

1.011

0.942

1.002

4

1.015

1.118

0.998

1.055

0.971

1.012

0.948

1.003

5

1.023

1.122

1.006

1.063

0.979

1.015

0.955

1.005

6

1.031

1.125

1.015

1.072

0.987

1.018

0.962

1.007

1800

3

1.002

1.128

0.986

1.042

0.959

1.021

0.935

1.007

4

1.005

1.129

0.989

1.045

0.962

1.022

0.941

1.010

5

1.012

1.132

0.995

1.051

0.968

1.024

0.945

1.012

6

1.018

1.134

1.001

1.058

0.974

1.026

0.949

1.014

C--Cooling capacity
P--Power

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

87

12.2.3 Installation & regulation guide for water flow switch

● Please carefully check flow switches before conducting installation of the water flow switch. Packing
should be in good condition, and the appearance should be free of damage and deformation. If any problem,
please contact the manufacturer.

● Flow switches can be installed in the horizontal pipeline or the vertical pipeline with upward flowing
direction but cannot be mounted in the pipeline with downward flowing direction. The inlet water of gravity
should be taken into account when flow switches are installed in the pipeline with upward flowing direction.

●Water flow switch must be installed on a section of straight-line pipeline, and the both ends must be
supplied with straight-line pipes whose length is at least 5 times diameter of the pipe. In the meanwhile, the
fluid flowing direction in the pipeline must be consistent with the direction of arrow on the controller. The
connection terminal should be located where wiring connection can be easily done.

● Pay attention to the following items when conducting installation and wire connection:
a. Collision of the wrench with the soleplate of the flow switch is prohibited, since such collision may cause

deformation and failure of the flow switch.
b. To avoid electric shock and damages to the devices, the power supply should be cut off, when wires are

connected or adjustment is done.
c. When wiring connection is conducted, adjustment of other screws except connection terminals of micro

switches and ground screws is prohibited. In the meanwhile, over great force should not applied when wires
of micro switches are connected, otherwise micro switches may suffer displacement, thus leading to failure
of flow switches.

d. Special grounding screws should be used for earth connection. Bolts should not be installed or removed
at will; otherwise flow switches may suffer deformation and failure.

e. Flow switches have been set at minimal flow value before leaving the factory. They should not be adjusted
below the setting value at the factory, or they may suffer failure. After installing flow switches, please press

the flow switch lever several times to check them. When the lever is found not to respond with “clatter”,
rotate the screw in a clockwise direction, until “clatter” occurs.

f. Be sure to determine the model of target slice according to the rated flow of the unit, the diameter of the
outlet pipe and the adjustment range of the target slice of the flow switch. Besides, the target slice should not
contact with other restrictors in the pipeline or on the inner wall of the pipeline, or the flow switch cannot be
reset normally.

● Determine whether the flow switch and the system connected with it are in good operation according to the
measured value by flow meter, namely, when the measured value on flow meter is less than 60% of rated
water flow of the unit, the water flow switch should be cut off and observed for 3 working periods, and it
should be covered with flow switch shell timely.

Schematic diagram of water flow switch

12.2.4 Installation of water system pipeline for 30kW module

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

88

Installation of multi-module water system pipeline

1) Installation mode I (recommended installation mode)

n :the module quantity, max 16

2) Installation mode II
n :the module quantity, max 16

12.2.5 Installation of water system pipeline for 60kW module

Total water outlet
temperature sensor

Water outlet

Water inlet

Electric

control box

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

89

Installation of single-module water system pipeline

Installation of multi-module water system pipeline

1) Installation mode I (recommended installation mode)

n :the module quantity, max 6

less than 6 modules

2) Installation mode III (recommended installation mode)
n : the module quantity, max 16

Installation mode A: less than 16 modules

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

90

3) Installation mode IV
n : the module quantity, max16

Installation mode A: less than 16 modules

4) Installation mode V
n : the module quantity, max8
m : the module quantity, max8

No.n module

No.(n-1) address

No.1 moduleNo.(n-1) module

No.(n-2) address No.0 address

No.(n-2) module

No.(n-3) address

No.2 moduleNo.(n-3) module

No.(n-4) address No.1 address

Drill dead hole at the

position, and move

the total effluent
temperature sensor

at No.0 address to

the position

Water flow switch

Pump

Yes

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

91

Installation mode A: less than 16 modules

12.2.6 Installation of water system pipeline for 120kW module
Installation of single-module water system pipeline

Electric control box

Total water outlet
temp sensor

Water intlet

Water outlet

Installation of multi-module water system pipeline

1) Installation mode I (recommended installation mode)
n : the module quantity, max8

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

92

Installation mode B: less than 8 modules

2) Installation mode II
n : the module quantity, max8

Installation mode B: less than 8 modules

12.2.7 Installation of water system pipeline for 180kW module
Installation of single-module water system pipeline

No.1 unit

No.0 address(main unit)

No.n unit (n≤8)No.(n-1) unit

No.(2n-3) address No.(2n-1) address

No.1 address No.(2n-4) address No.(2n-2) address

Pump

Drill dead hole at the

position, and move the
total effluent temperature
sensor at No.0 address to
the position

Water flow switch

Water flow switch

Drill dead hole at the

position, and move the
total effluent temperature

sensor at No.0 address to

the position

No.1 unit

No.0 address(main unit)

No.n unit (n≤8) No.(n-1) unit

No.(2n-3) addressNo.(2n-1) address

No.1 addressNo.(2n-4) addressNo.(2n-2) address

Pump

Total water outlet temperature sensor

Water outlet

Water inlet

Electric control box

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

93

Multi-module combination installation involves special design of the unit, so relevant explanation is
given as follows.

Installation mode of multi-module combination water system pipeline

1) Installation mode I (recommended installation mode)
n : the module quantity, max5

2) Installation mode II
n : the module quantity, max5

Notice:

1) For installation of multi-module, the most modules should be not more than 8 modular units.

2) For installation of multi-module, please drill a dead hole(Φ9mm) at the total water outlet pipeline,
and move the total water effluent temperature sensor at No.0 address to the hole.

No.1 unit

No.0 address(main unit)

No.n unit (n≤5)No.(n-1) unit

No.(3n-4) address No.(3n-1) address

No.1 address No.(3n-5) address No.(3n-2) address

Pump

No.2 address No.(3n-6) address No.(3n-3) address

Drill dead hole at the

position, and move the
total effluent temperature
sensor at No.0 address to
the position

Water flow switch

Water flow switch

Drill dead hole at the

position, and move the

total effluent temperature

sensor at No.0 address to

the position

No.1 unit

No.0 address(main unit)

No.n unit (n≤5) No.(n-1) unit

No.(3n-4) addressNo.(3n-1) address

No.1 addressNo.(3n-5) addressNo.(3n-2) address
No.2 addressNo.(3n-6) addressNo.(3n-3) address

Pump

Yes

Replace temp. sensor.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

94

12.2.8 Diameter parameters of main inlet and outlet pipes
Table of diameter parameters of main inlet and outlet pipes for 30kW module

Unit model x quantity

Total inlet and outlet water

pipe diameter

Unit model x quantity

Total inlet and outlet water

pipe diameter

30×1

DN40

30×9

DN100

30×2

30×10

30×3

DN65

30×11

30×4

30×12

DN125

30×5

30×13

30×6

DN80

30×14

30×7

30×15

30×8

30×16

Table of diameter parameters of main inlet and outlet pipes for 60kW module

Unit model x quantity

Total inlet and outlet water

pipe diameter

Unit model x quantity

Total inlet and outlet water

pipe diameter

60×1

DN65

60×9

DN125

60×2

60×10

60×3

DN80

60×11

DN150

60×4

DN100

60×12

60×5

60×13

60×6

60×14

60×7

DN125

60×15

DN200

60×8

60×16

Table of diameter parameters of main inlet and outlet pipes for 120kW module

Unit model x quantity

Total inlet and outlet water

pipe diameter

Unit model x quantity

Total inlet and outlet water

pipe diameter

120×1

DN65

120×5

DN125

120×2

DN80

120×6

DN150

120×3

DN100

120×7

DN150

120×4

DN125

120×8

DN200

Table of diameter parameters of main inlet and outlet pipes for 180kW module

Unit model x quantity

Total inlet and outlet water

pipe diameter

Unit model x quantity

Total inlet and outlet water

pipe diameter

180×1

DN80

180×4

DN150

180×2

DN100

180×5

DN200

180×3

DN125

Please pay attention to the following items when installing multiple modules:

● Each module corresponds to an address code which can’t be repeated.

● Main water outlet temperature sensing bulb, target flow controller and auxiliary electric heater are under

control of the main module.

● One wired controller and one target flow controller are required and connected on the main module.

● The unit can be started up through the wired controller only after all addresses are set and the
aforementioned items are determined. The wired controller is ≤500m away from the outdoor unit.

12.2.9 Chilled water flow

Minimum chilled water flow

The minimum chilled water flow is shown in the below table.
If the system flow is less than the minimum unit flow rate, the evaporator flow can be recalculated, as shown

in the diagram.

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

95

Maximum chilled water flow

The maximum chilled water flow is limited by the permitted pressure drop in the evaporator. It is provided in
the below table.

If the system flow is more than the maximum unit flow rate, bypass the evaporator as shown in the diagram
to obtain a lower evaporator flow rate.

Minimum and Maximum water flow rates

Item

Water flow rate(m3/h)

Model

Minimum

Maximum

MGCT-F30W/PN1

4.68

5.72

MGCT-D30W/PN1

4.68

5.72

MGBT-F60W/PN1

9.27

11.33

MGBT-F120W/PN1

18.54

22.66

MGB-F180W/PN1

27.9

34.1

12.2.10 Design of the store tank in the system

a. kW is the unit for cooling capacity, L is the unit for (G) minimum water flow volume in the formula.
Comfortable type air conditioner
G= cooling capacity×2.6L
Process type cooling
G= cooling capacity×7.4L
b. In certain occasion (especially in manufacture cooling process), for conforming the system water content

requirement, it’s necessary to mount a tank equipping with a cut-off baffle at the system to avoid water
short-circuit, Please see the following schemes:

Evaporator

Recirculation

For minimum chilled water flow rate

For maximum chilled water flow rate

Evaporator

Recirculation

Error

Recommendation

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

96

12.2.11 Design of expansion tank

If a closed expansion tank with its filled volume of air is too small, the system pressure will easily exceed the
maximum allowable pressure and cause water to discharge from the pressure relief valve, thus wasting
water. If the closed tank is too large, when the water temperature drops, the system pressure may decrease
to a level below the minimum allowable value and cause trouble in the aire vent. Therefore, accurate sizing
of a closed expansion tank is essential.

For diaphragm expansion tanks, the minimum volume of the water tank, Vt, gal(m3),can be calculated by the
following formula, recommended by ASHRAE Handbook 1996, HVAC Systems and Equipment:

Vt=Vs v2/v1-1-3α(T2-T1)

1-p1/p2

T1=lower temperature,oF (℃)

T2=higher temperature, oF (℃)
Vs=volume of water in system, gal(m3)

p1=absolute pressure at lower temperature,psia(kPa abs.)
p2=absolute pressure at higher temperature,paia(kPa abs.)
v1,v2=specific volume of water at lower and higher temperature, respectively, ft3/lb(m3/kg)

α=linear coefficient of thermal expansion; for steel, α=6.5x10-6in./in·oF(1.2x10-5per ℃); for copper,
α=9.5x10-6in./in·oF(1.7x10-5per ℃)

In a chilled water system, the higher temperature T2 is the highest anticipated ambient temperature when
the chilled water system shuts down during summer. The lower temperature in a heating system is often the
ambient temperature at fill conditions(for example, 50 oF or 10℃).

12.2.12 Selection and installation of the pump

(1)Select the pump

a. Select the water-flow of the pump
The rated water-flow must no less than the unit rated water-flow; in terms of multi-connect the units, that

water-flow must no less than total units’ rated water-flow.
b. Select the left of the pump.
H=h1+h2+h3+h4
H: The lift of the pump.
h1: Main unit water resistance.
h2: Pump water resistance.
h3: Water resistance of the longest water-loop distance, includes: pipe resistance, different valve’s

Error

Recommendation

Error

Recommendation

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

97

resistance, flexible pipe resistance, pipe elbow and three-way resistance, two-way resistance or three-way
resistance, as well as filter resistance.

H4: the longest terminal resistance.
(2) Installation the pump
a. The pump should be installed at the water inlet pipe, both of which sides must mount the soft connectors

for vibration-proof.
b. The backup pump for the system (recommended).
c. Units must with a main unit controls (Please see “4.5 fielding wiring” for the controls diagram).

12.3 Wiring Installation

All wiring installation should be done by qualified person.

12.3.1 Precautions:

1. The air-conditioner should apply special power supply, whose voltage should conform to rated voltage.

2. Wiring construction must be conducted by the professional technicians according to the labeling on the
circuit diagram.

3. Only use the electric components specified by our company, and require installation and technical
services from the manufacturer or authorized dealer. If wiring connection fails to conform to electric
installation norm, failure of the controller, electronic shock, and so on may be caused.

4. The connected fixed wires must be equipped with full switching-off devices with at least 3mm contact
separation.

5. Set leakage protective devices according to the requirements of national technical standard about electric
equipment.

6. After completing all wiring construction, conduct careful check before connecting the power supply.

7. Please carefully read the labels on the electric cabinet.

8. The user’s attempt to repair the controller is prohibited, since improper repair may cause electric shock,
damages to the controller, and so on. If the user has any requirement of repair, please contact the
maintenance center.

12.3.2 Power supply specification

Items

Model

Outdoor power supply

Wiring

Power supply

Manual switch

Fuse

MGCT-F30W/PN1

380V～3Ph～60Hz

50A

36A

10mm2
(<30m)

MGCT-D30W/PN1

380V～3Ph～60Hz

50A

36A

10mm2
(<30m)

MGBT-F60W/PN1

380V～3Ph～60Hz

125A

100A

16mm2

(<20m)

MGBT-F120W/PN1

380V～3Ph～60Hz

200A

150A

Base on the actual distance of the
wire, more than 35 mm2 for each
module

MGBT-F180W/PN1

380V～3Ph～60Hz

350A

300A

According to the actual distance of
wiring,70mm2 or lager for each unit.

12.3.3 Requirements of wiring connection

● No additional control components are required in the electric cabinet (such as relay, and so on), and the
power supply and control wires not connected with the electric cabinet are not allowed to go through the
electric box. Otherwise, electromagnetic interference may cause failure of the unit and control components
and even damages to them, which thus lead to protective failure.

● All cables led to the electrical box should be supported independently by the electric box.

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

98

● The strong current wires generally pass the electrical box, and 380V alternating current may also pass the
control board, so wiring connection should conform to the principle of separation of strong current and weak
current, and the wires of power supply should be kept more than 100 mm away from the control wires.

● Only use 380V 3Ph~ 60Hz rated power supply for the unit, and the maximum allowable range of voltage is
342V-418V.

● All electric wires must conform to local wiring connection norm. The suitable cables should be connected
to power supply terminal through wiring connection holes at the bottom of the electric cabinet. According to
Chinese standard, the user is responsible for providing voltage and current protection for the input power
supply of the unit.

● All power supplies connected to the unit must pass one manual switch, to ensure that the voltages on all
nodes of electric circuit of the unit are released when the switch is cut off.

● The cables of correct specification must be used to supply power for the unit. The unit should use
independent power supply, and the unit is not allowed to use the same power supply together with other
electric devices, to avoid over-load danger. The fuse or manual switch of the power supply should be
compatible with working voltage and current of the unit. In case of parallel connection of multiple modules,
the requirements of wiring connection mode and configuration parameters for the unit are shown in the
following figure.

● Some connection ports in the electric box are switch signals, for which the user needs to provide power,
and the rate voltage of the power should be 380V AC. The user must be aware that all power supplies they
provided should be obtained through power circuit breakers (provided by the user), to ensure that all
voltages on the nodes of the provided power supply circuit are released when the circuit breakers are cut off.

● All inductive components provided by the user (such as coils of contactor, relay, and so on) must be
suppressed with standard resistance-capacitance suppressors, to avoid electromagnetic interference, thus
leading to failure of the unit and its controller and even damages to them.

● All weak current wires led to the electric box must apply shielded wires, which must be provided with
grounding wires. The shield wires and power supply wires should be laid separately, to avoid
electromagnetic interference.

● The unit must be provided with grounding wires, which are not allowed to be connected with the grounding
wires of gas fuel pipelines, water pipelines, lightning conductors or telephones. Improper earth connection
may cause electric shock, so please check whether earth connection of the unit is firm or not frequently.

Notice:

1) 30kW module only 16 modular units can be combined at most.

2) 60kW module only 16 modular units can be combined at most.

3) 120kW module only 8 modular units can be combined at most.

4) 180kW module only 5 modular units can be combined at most.

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

99

12.3.4 Wiring steps

Step

Content

1

Check the unit and ensure that it is connected with grounding wires correctly, to avoid leakage, and the
grounding devices should be mounted in strict accordance with the requirements of electrical engineering rules.
The grounding wires can prevent electric shock.

2

The control box of the main power switch must be mounted in a proper position.

3

Wiring connection holes of the main power should be provided with glue cushion.

4

The main power and neutral wires and grounding wires of power supply are led into the electric box of the unit.

5

The wires of the main power must pass the bonding clamp.

6

Wires should be connected firmly to the connection terminals A, B, C, and N.

7

Phase sequences must be consistent when the wires of the main power.

8

The main power should be located out of easy reach of non-professional maintenance personnel, to avoid
mal-operation and improve safety.

9

Connection of control wires of water flow switches: the wire leads (prepared by the user) of water flow switches
are connected to the connection terminals W1 and W2 of the main unit.

10

Connection of control wires of auxiliary electric heaters: the control wires of AC contactor of the auxiliary electric
heater must pass the connection terminals H1 and H2 of the main unit, as shown..

11

Connection of control wires of pump: the control wires of AC contactor of the pump must pass the connection
terminals P1 and P2 of the main unit, as shown.

12

The connection way of the wired controller connects with every signal wires from package units: signal wires P,
Q, E are connected in the same way of main wires connection method and accordingly connect to the terminals
P, Q, E in the wired controller.

H1

H2

P

o

w

e

r

s

u

p

p

l

y

(

2

2

0

-

2

4

0

V

~

6

0

H

z

)

Overcurrent relay

Control coil of AC contactor

P1

P2

P

o

w

e

r

s

u

p

p

l

y

(

2

2

0

-

2

4

0

V

~

6

0

H

z

)

Overcurrent relay

Control coil of AC contactor

Switch (For trial run of pump)

R410A tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09

100

12.3.5 Fielding wiring

○

1 .Wiring of “ON/OFF” weak electric port

Corresponding parallel connect the “ON/OFF” port of the main unit’s electric control box, then, connect the
“ON/OFF” signal (provide by user) to the “ON/OFF” port of main unit as follows.

○

2 .Remote mode selection: Wiring of “HEAT/COOL” weak electric port

Corresponding parallel connect the “HEAT/COOL” port of the main unit’s electric control box, then, connect
the “ON/OFF” signal (provide by user) to the “HEAT/COOL” port of main unit as follows.

○

3 .Wiring of “ALARM” port

Connect the device provided by user to the “ALARM” ports of the module units as follows.

If the unit is operating normally, the ALARM port is closed, otherwise, the ALARM port is not closed.

0# electric

control box

“ON/OFF” port

ON/OFF signal

Power (DC 12V)

Main control board is provided

Red

Blue

0# electric
control box

“HEAT/COOL” port

ON/OFF signal

Power (DC 12V)

Main control board is provided

Brown

Black

electriccontrol box

“ALARM” port

Deviceprovided

byuser

Red

Red

MCAC-ATSM-2014-09 R410A tropical air-cooled scroll chiller unit 60Hz

101

13 Commissioning

1. Preparation

● After the water system pipeline is flushed several times, please make sure that the purity of water meets
the requirements; the system is re-filled with water and drained, and the pump is started up, then make sure
that water flow and the pressure at the outlet meet the requirements.

● The unit is connected to the main power 12 hours before being started up, to supply power to the heating
belt and pre-heat the compressor. Inadequate pre-heating may cause damages to the compressor.

● Setting of the wired controller. See details of the manual concerning setting contents of the controller,
including such basic settings as refrigerating and heating mode, manual adjustment and automatic
adjustment mode and pump mode. Under normal circumstances, the parameters are set around standard
operating conditions for trial run, and extreme working conditions should be prevented as much as possible.

● Carefully adjust the target flow controller on the water system or the inlet stop valve of the unit, to make the
water flow of the system accord with the water flow in specification table.

2. Test run

6.3.1 Start up the controller and check whether the unit displays a fault code. If a fault occurs, remove the

fault first, and start the unit according to the operating method in the “unit control instruction”, after

determining that there is no fault existing in the unit.

6.3.2 Conduct trial run for 30 min. When the influent and effluent temperature becomes stabilized, adjust the
water flow to nominal value, to ensure normal operation of the unit.

6.3.3 After the unit is shut down, it should be put into operation 10 min later, to avoid frequent start-up of the
unit. In the end, check whether the unit meets the requirements in specification table.

Notice:

● The unit can control start-up and shut-down, so when the water system is flushed, the operation of the
pump should not be controlled by the unit.

● Do not start up the unit before draining the water system completely.

● The water flow switch must be installed correctly. The wires of the water flow switch must be connected

according to electric control schematic diagram, or the faults caused by water breaking while the unit is in

operation should be the user’s responsibility.

● Do not re-start the unit within 10 min after the unit is shut down during trial run.

● When the unit is used frequently, do not cut off the power supply after the unit is shut down; otherwise the

compressor cannot be heated, thus leading to its damages.

● If the unit is not in service for a long time, and the power supply needs to be cut off, the unit should be
connected to the power supply 12 hours prior to re-starting of the unit, to pre-heat the compressor.