McQuay M4AC080C User manual

Air-Cooled Mini Chiller and Heat Pump
M4AC 080 ÷ 150 C
Cooling capacity from 22,4 to 40,0 kW
M4AC 080 ÷ 150 CR
Cooling capacity from 21,7 to 38,7 kW
Heating capacity from 25,6 to 41,5 kW
50 Hz –HFC 407 C refrigerant
Product, Installation and Operation Manual 309 B/C –03/03 A
Date:
March 2003
Supersedes
:
none
Библиотека СОК 

309 B/C –03/03 A –page 2/28
"McQuay" is a registered trademark of McQuay International. All rights reserved throughout the world.
??????????????????????????????????????????2002 McQuay International
"Bulletin illustrations cover the general appearance of McQuay International products at the time of
publication and we reserve the right to make changes in design and construction at any time without notice."
Installation and maintenance are to be performed only by qualified personnel who are familiar with local
codes and regulations, and experienced with this type of equipment.
McQuay is not responsible for any unit damage, personal injury or death
due to not complying with these
requirements.
Caution
!
Warning
Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.
!
Moving machinery and electrical power hazards may cause severe personal injury or death. Disconnect
and lock off power before servicing equipment.
Warning
!

309 B/C –03/03 A –page 3/28
Introduction
For years, McQuay international has earned a reputation for providing the industry with various highest quality and most
technologically advanced air conditioning systems. Now McQuay is proud to introduce the new generation mini air-
cooled chiller-M4AC C series. Inherited from the advantage of the earlier product experiences and introduced the most
up-to-date technology, the new M4AC C series are designed with the always-in-mind concept -to satisfy customers’
requirements of high efficiency, comfort, safety, intelligence to maximum extent. The unit can be flexibly coupled with
multi fan coil units, easily operated with artificial intelligence. Additionally combined with indoor top level decoration, this
bring you to enjoy the nobility coming from central air conditioning.
Providing the features such as high efficiency, low noise, compactness, simple operation, safety running, easy
installation and maintenance etc., the unit is widely equipped in plant, station, hotel, villa, office building, top-level
apartment as well as process cooling application.
Nomenclature
M 4 AC 030 C R
Brand Name Air Cooled Generation
(McQuay) Chiller
HFC 407C
Refrigerant
Nominal Cooling Capacity
—
Cooling
R Heat Pump

309 B/C –03/03 A –page 4/28
Features
Superior Performance
Extensive research work coupled with world leading manufacturing technology has resulted the new design with superb
performance and high efficiency.
Stringent quality control and component selection ensure performance and reliability. Major components are rigorously
tested and qualified prior to usage in the machine.
Every machine design has passed many hours of rigorous testing to ensure the machine reliability, durability and quality.
Scroll compressor brings much higher energy efficiency. High efficiency heat exchanger ensures strenuous exertion of
equipment capacity. Dedicated water pump particularly designed for air conditioning engineering is operating steadily
with minimum vibration and noise.
M4AC080C/CR To M4AC150C/CR units are designed with double independent refrigerating system, greater energy
saving is achieved by only one compressor on duty under part load condition.
Simple To Operate
The machine is complete with intelligent microprocessor controller and temperature sensor to automatically control the
operation to its optimum condition, making it very simple to operate. All temperature settings are finished before
shipment. The only thing for user to do is to start the unit by pressing the ON/OFF button after ensuring unit proper
function, then every operation can be automatically performed by the unit itself.
Either wireless remote controller or wired remote controller is ready for choosing to meet satisfactory indoor unit control,
both compatible with the unit.
Friendly Installation
The machine has been designed with friendly installation in mind such that no refrigeration charging or copper pipe
brazing is required on site.
Threaded fitting is provided for easy water piping connection on site.
Water inlet and outlet are provided on both sides of the machine such that piping can be connected on either side of the
machine.
Rust resistant PP-R composite water pipe with good insulation property and high durability is standard parts in the
machine.
Stainless steel taper threaded fittings target convenient disassembly or assembly.
For M4AC080C/CR to M4AC150C/CR, expansion chamber, water pump and water flow switch are already equipped in
this compact packaged unit with top air discharge. Both front and rear sides can be served as access to performing
wiring and maintenance.
Safety Control
Protection devices such as dual pressure protection and overload protection etc. is provided to ensure unit operating
within safety condition range. The microprocessor-based controller automatically directs system on or off by processing
the water temperature feedback. If the water temperature falls to unacceptable low point, the controller automatically shut
off the system to prevent hydraulic system internal freeze for unit safety operation. Meanwhile, the microprocessor-based
controller automatically monitors every component operating status and malfunction, and feedback it to indoor controller
to greatly ease the work of status monitor and troubleshooting.
All Weather
The cabinet is made of electro galvanized mild steel sheet, coated with baked polyester power to ensure the units extra
durability in all climates against sun, rain, wind corrosion.
Space saving (small footprint) design of the machine eliminates large installation area requirement, no need for
equipment room.
The machine uses high quality parts to ensure durability in various climate conditions.
Simple To Maintain
The simple design of the machine allows for maximum serviceability. All components are with reach of the maintenance
personnel upon open up of the servicing panel. If emergency shutoff occurs, the microprocessor-based controller will
indicates the fault cause to quicken and ease troubleshooting.

309 B/C –03/03 A –page 5/28
General Specification
Compressor
McQuay Mini Chillers M4AC080C(R) to M4AC150C(R) are equipped with highly efficient, reliable and silence scroll
compressors.
Air-Cooler Condenser
The air-cooled condenser coil consists of staggered rows of 3/8’’ O.D. seamless copper tube, mechanically expanded
into die formed aluminum fins to ensure optimum heat exchange capability.
Condenser Fan Motor
To achieve the high air change requirement, the unit is equip with the high air flow propeller fan. The fan is direct driven
by weatherproof motor to ensure reliable continuos operation.
Evaporator
The heat exchanger is made of stainless steel plates closely arranged and brazed together to ensure high heat
exchange efficiency. The complete heat exchanger is insulated with thermal insulation closed cell rubber foam to give
optimum thermal insulation.
Refrigerant Circuit
The refrigerant circuit is factory brazed and evacuated before accurately charged with HFC 407C to ensure optimum
operating requirement. To ensure flawless continuous operation, each refrigerant circuit is equipped with a carefully
sized capillary tube.
Additional Safety Protection
The units are equipped with intelligently designed safety control to ensure continuous safe operation. High and low
pressure switch is provided to prevent the compressor damage resulting from both abnormally high discharge head
pressure or low pressure due to insufficient gas. The compressors are provided with crank case heater to prevent liquid
migration during the off cycle and also to ease the start up of the unit.
The standard electronic controller provides accurate water temperature control in the circuit by closely monitoring and
reacting to the input from the water entering temperature, water leaving temperature and ambient air temperature.
Flow switch is provided in the unit to protect against damage to the water pump.
During abnormal condition, the electronic controller will turn the unit off and the then display the faulty of operation. (See
Troubleshooting sheet)

309 B/C –03/03 A –page 6/28
Controller
The controller accomplishes its control function with its built-in microprocessor. The two parameters, temperature and
water flow rate, have been factory set before shipment, no need for users to reset them. The controller will display unit
operation status to favor specialized personnel to monitor unit operating condition for maintenance if necessary. When
the system is cut off due to malfunction, the controller will display the corresponding failure code for easy trouble
shooting.
Installation and connection
After removing the terminal box cover, you will find the indoor controller, 20m long indoor connection wire, and 1.5m long
maintenance connection wire. Decide a suitable place for installing the indoor controller, you can either mount it on wall
or embed it in wall. Open the back cover of the indoor controller, plug one end of the indoor connection wire to the CN3
connector located on controller, insert another end to the CN6 connector located on PCB, then assembly the terminal
box cover back, now this work is finished.
Please ensure the 1.5m maintenance connection wire being in good keep for later maintenance by specialized
personnel.
Indoor LCD controller
After switching on power, the indoor controller will display system time, indoor temperature and unit status.
During normal operation, it will display the unit return water temperature.
When failure occurs, it will emit alarm, both audible and visual. Meanwhile show a corresponding error code. Please see
Troubleshooting With Microprocessor sheet.
a) On/off
Start an operation
First press [MODE] button, select “cooling” or “heating” mode, then press [ON/OFF] button, the yellow lamp besides the
[ON/OFF] button lights up and the system starts.
Stop an operation
Press the [ON/OFF] button again, the yellow lamp goes off and the system stops.
b) Indicating lamps on PCB
When the power supply is switched on, the red lamp lights up.
When the system is on operation, the green lamp lights up.
c) Below are the controllers’ protection functions and features, not its faults.
When restarting the unit after last start or stop, the unit automatically starts compressor and fan after the lapse of
approximately three minutes.
During defrosting cycle, the outdoor fan is stopped.
PCB MAIN
BOARD
TRANSFORMER
RETURN WATER TEMP. SENSOR
HOUR
TIMER
MCH03A
PARAMETER
SET
GROUP
OPERATION
WEEK SET
EXIT WEEK
CLEAR UNIT
No. MODE
SC302A
CONTROLLER
OK
MINUTE
ROOM
TEMP.
ON/OFF
LED1 LED2
SUPPLY WATER TEMP. SENSOR
RETURN AIR TEMP. SENSOR
DEFROSTING TEMP. SENSOR1
DEFROSTING TEMP.
SENSOR2

309 B/C –03/03 A –page 7/28
Cooling Only Unit
Note:
(1) Nominal cooling capacity referred to 12/7 ° C in/out evaporator water temperature 35 °C air ambient temperature
M4AC080C
M4AC100C
Watt
22.400
26.700
THICKNESS
mm
HEIGHT (H) mm (in)
WIDTH (W) mm (in)
DEPTH (D) mm (in)
kg
340
350
dB(A)
62
64
EVAPORATOR
m
2
2,26
2,78
l/s
1,08
1,31
kPa
74
82
kPa
104
121
WATER LINE(HYDRAULIC KIT)
POWER SUPPLY
V/Ph/Hz
RUNNING CURRENT
Amp
1,1
1,1
WATER FLOW RATE
GPM U.S. (l/s)
17.17(1.08)
20.70(1.31)
INSTALLATION PIPE CONNECTION
mm (in)
42 (Rc 1-1/4)
42 (Rc 1-1/4)
HEAD
m
26
23,5
CAPACITY / VOLUME
litres
8
8
CONDENSER COIL
WALL THICKNESS
mm (in)
OUTER DIAMETER
mm (in)
THICKNESS
mm (in)
2
2
14
14
m
2
(ft
2
)
2.5 (26.9)
2.5 (26.9)
CONDENSER FAN
2
2
mm (in)
600 (23.6)
600 (23.6)
V/Ph/Hz
220 / 1 / 50
220 / 1 / 50
Amp
0.9*2
0.9*2
Watt
120*2
120*2
Watt
200*2
200*2
8
8
cmm/cfm
100*2 / 3530*2
100*2 / 3530*2
COMPRESSOR
Scroll
Scroll
V/Ph/Hz
380 / 3 / 50
380 / 3 / 50
Amp
7.3*2
8.6*2
Watt
3,900*2
4,800*2
Amp
40
48
REFRIGERANT
kg
3.5*2
3.3*2
19.260
22.960
PLATE MATERIAL
FINISH
MODEL
NOMINAL COOLING CAPACITY
CASING
MATERIAL
kcal/hr
Electro-galvanised Mild Steel
Polyester Power
1,0
TOTAL
UNIT
DIMENSION
1260 (49.6)
1500 (59.1)
900 (35.4)
NET WEIGHT
NOISE LEVEL
TYPE
Brazed Plate Heat Exchanger
Stainless Steel
HEAT EXCHANGE AREA
NOMINAL WATER FLOW
BPHE PRESSURE DROP VS NOMINAL FLOW RATE
UNIT PRESSURE DROP WS NOMINAL FLOW RATE
PUMP
TYPE
Horizontal Multistage End-Suction
380 / 3 / 50
PIPING
EXPANSION
TANK
MATERIAL
Steel
TYPE
Cross Finned Tubes
TUBE
MATERIAL
Seamless Copper
0.35 (0.014)
9.52 (3/8)
FIN
MATERIAL
Aluminium
0.127 (0.0005)
ROWS
FINS PER INCH
FACE AREA
TYPE/DRIVE
Propeller/Direct
QUANTITY
BLADE MATERIAL
Aluminium
BLADE DIAMETER
POWER SUPPLY
RATED RUNNING CURRENT
RATED INPUT
POWER SUPPLY
RATED RUNNING CURRENT
RATED INPUT
RATED OUTPUT
MOTOR POLES
AIR VOLUME
TYPE
0-50-100
MAXIMUM STARTING CURRENT
PROTECTION DEVICES
Overload Protection, Flow Switch & H/L Pressure Switch
CHARGING MASS
TYPE
HFC407C
CONTROL
Capillary Tube
STAGE OF CAPACITY CONTROL (%)

309 B/C –03/03 A –page 8/28
Cooling Only Unit
Note:
(1) Nominal cooling capacity referred to 12/7 ° C in/out evaporator water temperature 35 °C air ambient temperature
M4AC120C
M4AC150C
Watt
33.400
40.000
THICKNESS
mm
HEIGHT (H) mm (in)
WIDTH (W) mm (in)
DEPTH (D) mm (in)
kg
470
550
dB(A)
67
70
EVAPORATOR
m
2
3,0
3,6
l/s
1,67
2,0
kPa
76
75
kPa
138
155
WATER LINE(HYDRAULIC KIT)
POWER SUPPLY
V/Ph/Hz
RUNNING CURRENT
Amp
2,5
2,5
WATER FLOW RATE
GPM U.S. (l/s)
26.42(1.67)
31.70(2.0)
INSTALLATION PIPE CONNECTION
mm (in)
42 (Rc 1-1/4)
42 (Rc 1-1/4)
HEAD
m
31
28
CAPACITY / VOLUME
litres
8
8
CONDENSER COIL
WALL THICKNESS
mm (in)
OUTER DIAMETER
mm (in)
THICKNESS
mm (in)
2
2
14
14
m
2
(ft
2
)
2.5 (26.9)
2.5 (26.9)
CONDENSER FAN
2
2
mm (in)
660 (26)
660 (26)
V/Ph/Hz
Amp
0.86*2
4.5*2
Watt
200*2
450*2
Watt
470*2
820*2
8
6
cmm/cfm
142*2 / 5000*2
142*2 / 5000*2
COMPRESSOR
Scroll
Scroll
V/Ph/Hz
380 / 3 / 50
380 / 3 / 50
Amp
10.3*2
11.5*2
Watt
5,300*2
6,240*2
Amp
55
62
REFRIGERANT
kg
6.3*2
5.7*2
34.390
Electro-galvanised Mild Steel
FINISH
Polyester Power
MODEL
NOMINAL COOLING CAPACITY
CASING
MATERIAL
1
kcal/hr 28.720
TOTAL
UNIT
DIMENSION
1260 (49.6)
1800 (70.9)
1150 (45.3)
Brazed Plate Heat Exchanger
PLATE MATERIAL
Stainless Steel
NET WEIGHT
NOISE LEVEL
TYPE
Horizontal Multistage End-Suction
380 / 3 / 50
HEAT EXCHANGE AREA
NOMINAL WATER FLOW
BPHE PRESSURE DROP VS NOMINAL FLOW RATE
UNIT PRESSURE DROP VS NOMINAL FLOW RATE
PIPING
EXPANSION
TANK
MATERIAL
PUMP
TYPE
TYPE
Cross Finned Tubes
TUBE
MATERIAL
Seamless Copper
0.35 (0.014)
Propeller/Direct
9.52 (3/8)
FIN
MATERIAL
Aluminium
0.127 (0.0005)
ROWS
FINS PER INCH
QUANTITY
BLADE MATERIAL
BLADE DIAMETER
FACE AREA
TYPE/DRIVE
POWER SUPPLY
380 / 3 / 50
RATED RUNNING CURRENT
RATED INPUT
RATED OUTPUT
MOTOR POLES
AIR VOLUME
TYPE
PROTECTION DEVICES
POWER SUPPLY
RATED RUNNING CURRENT
RATED INPUT
CHARGING MASS
Steel
TYPE
HFC 407C
CONTROL
Capillary Tube
Overload Protection, Flow Switch & H/L Pressure Switch
STAGE OF CAPACITY CONTROL (%)
0-50-100
MAXIMUM STARTING CURRENT

309 B/C –03/03 A –page 9/28
Heat Pump Unit
Note:
(1) Nominal cooling capacity referred to 12/7 ° C in/out evaporator water temperature 35 °C air ambient temperature
(2) Heating capacity referred to: 40/45°C in/out Hot water temp. & air ambient temperature. 7°C, 90% R.H.
M4AC080CR
M4AC100CR
Watt
21.700
25.800
kcal/hr
22.010
25.970
Watt
25.600
30.200
THICKNESS
mm
HEIGHT (H)
mm (in)
WIDTH (W)
mm (in)
DEPTH (D)
mm (in)
kg
350
360
dB(A)
62
64
EVAPORATOR
m
2
2,26
2,78
l/s
1.08/1.14
1.31/1.39
kPa
74/72
82/80
kPa
104
121
WATER LINE(HYDRAULIC KIT)
POWER SUPPLY
V/Ph/Hz
RUNNING CURRENT
Amp
1,1
1,1
WATER FLOW RATE ( C / H )
GPM U.S. (l/s)
17.17(1.08)/18.05(1.14)
20.70(1.31)/22.02(1.39)
INSTALLATION PIPE CONNECTION
mm (in)
42 (Rc 1-1/4)
42 (Rc 1-1/4)
HEAD (C / H)
m
26/25
23.5/22.5
CAPACITY / VOLUME
litres
8
8
CONDENSER COIL
WALL THICKNESS
mm (in)
OUTER DIAMETER
mm (in)
THICKNESS
mm (in)
2
2
14
14
m
2
(ft
2
)
2.5 (26.9)
2.5 (26.9)
CONDENSER FAN
2
2
mm (in)
600 (23.6)
600 (23.6)
V/Ph/Hz
220 / 1 / 50
220 / 1 / 50
Amp
0.9*2
0.9*2
Watt
120*2
120*2
Watt
200*2
200*2
8
8
cmm/cfm
100*2 / 3530*2
100*2 / 3530*2
COMPRESSOR
Scroll
Scroll
V/Ph/Hz
380 / 3 / 50
380 / 3 / 50
Amp
7.3*2
8.6*2
Amp
7.3*2
8.6*2
Watt
3,900*2
4,800*2
Watt
3,900*2
4,800*2
Amp
40
48
REFRIGERANT
kg
4.0*2
4.6*2
kcal/hr 18660 22180
FINISH
MODEL
NOMINAL COOLING CAPACITY
NOMINAL HEATING CAPACITY
CASING
MATERIAL
TYPE
TOTAL
UNIT
DIMENSION
1260 (49.6)
1500 (59.1)
900 (35.4)
PLATE MATERIAL
HEAT EXCHANGE AREA
NOMINAL WATER FLOW (COOLING/HEATING)
Electro-galvanised Mild Steel
Polyester Power
1,0
Brazed Plate Heat Exchanger
Stainless Steel
NET WEIGHT
NOISE LEVEL
Horizontal Multistage End-Suction
Steel
BPHE PRESSURE DROP VS NOMINAL FLOW RATE (C/H)
UNIT PRESSURE DROP VS NOMINAL FLOW RATE
PUMP
TYPE
PIPING
EXPANSION
TANK
MATERIAL
380 / 3 / 50
Aluminium
0.127 (0.0005)
TYPE
TUBE
MATERIAL
Cross Finned Tubes
Seamless Copper
0.35 (0.014)
9.52 (3/8)
FIN
MATERIAL
ROWS
FINS PER INCH
FACE AREA
TYPE/DRIVE
QUANTITY
Propeller/Direct
BLADE MATERIAL
Aluminium
BLADE DIAMETER
POWER SUPPLY
RATED RUNNING CURRENT
RATED INPUT
RATED OUTPUT
MOTOR POLES
AIR VOLUME
RATED INPUT (HEATING)
MAXIMUM STARTING CURRENT
PROTECTION DEVICES
TYPE
POWER SUPPLY
RATED RUNNING CURRENT (COOLING)
RATED RUNNING CURRENT (HEATING)
TYPE
RATED INPUT (COOLING)
CONTROL
CHARGING MASS
STAGE OF CAPACITY CONTROL (%)
Overload Protection, Flow Switch & H/L Pressure Switch
0-50-100
HFC 407C
Capillary Tube

309 B/C –03/03 A –page 10/28
Heat Pump Unit
Note:
(1) Nominal cooling capacity referred to 12/7 ° C in/out evaporator water temperature 35 °C air ambient temperature
(2) Heating capacity referred to: 40/45°C in/out Hot water temp. & air ambient temperature. 7°C, 90% R.H.
M4AC120CR
M4AC150CR
kcal/hr
27.690
33.280
Watt
32.200
38.700
kcal/hr
31.210
35.680
Watt
36.300
41.500
THICKNESS
mm
HEIGHT (H)
mm (in)
WIDTH (W)
mm (in)
DEPTH (D)
mm (in)
kg
480
560
dB(A)
67
70
EVAPORATOR
m
2
3,0
3,6
l/s
1.67/1.78
2.0/2.11
kPa
76/74
75/73
kPa
138
155
WATER LINE(HYDRAULIC KIT)
POWER SUPPLY
V/Ph/Hz
RUNNING CURRENT
Amp
2,5
2,5
WATER FLOW RATE ( C / H )
GPM U.S. (l/s)
26.42(1.67)/28.18(1.78)
31.70(2.0)/33.47(2.11)
INSTALLATION PIPE CONNECTION
mm (in)
42 (Rc 1-1/4)
42 (Rc 1-1/4)
HEAD (C / H)
m
31/29
28/26
Steel
CAPACITY / VOLUME
litres
8
8
CONDENSER COIL
WALL THICKNESS
mm (in)
OUTER DIAMETER
mm (in)
THICKNESS
mm (in)
2
2
14
14
m
2
(ft
2
)
2.5 (26.9)
2.5 (26.9)
CONDENSER FAN
2
2
mm (in)
660 (26)
660 (26)
V/Ph/Hz
Amp
0.86*2
4.5*2
Watt
200*2
450*2
Watt
470*2
820*2
8
6
cmm/cfm
142*2 / 5000*2
142*2 / 5000*2
COMPRESSOR
Scroll
Scroll
V/Ph/Hz
380 / 3 / 50
380 / 3 / 50
Amp
10.3*2
11.5*2
Amp
10.3*2
11.5*2
Watt
5,300*2
6,240*2
Watt
5,300*2
6,240*2
Amp
55
62
REFRIGERANT
kg
7.5*2
6.8*2
Electro-galvanised Mild Steel
Polyester Power
1
1260 (49.6)
CONTROL
CHARGING MASS
1800 (70.9)
1150 (45.3)
Brazed Plate Heat Exchanger
Stainless Steel
Horizontal Multistage End-Suction
380 / 3 / 50
Cross Finned Tubes
STAGE OF CAPACITY CONTROL (%)
TYPE
Seamless Copper
0.35 (0.014)
9.52 (3/8)
Aluminium
0.127 (0.0005)
Propeller/Direct
380 / 3 / 50
Overload Protection, Flow Switch & H/L Pressure Switch
RATED INPUT (COOLING)
MAXIMUM STARTING CURRENT
PROTECTION DEVICES
TYPE
POWER SUPPLY
RATED RUNNING CURRENT (COOLING)
RATED RUNNING CURRENT (HEATING)
RATED OUTPUT
MOTOR POLES
AIR VOLUME
RATED INPUT (HEATING)
BLADE DIAMETER
POWER SUPPLY
RATED RUNNING CURRENT
RATED INPUT
TYPE/DRIVE
QUANTITY
BLADE MATERIAL
MATERIAL
ROWS
FINS PER INCH
FACE AREA
TYPE
TUBE
MATERIAL
FIN
EXPANSION
TANK
MATERIAL
PLATE MATERIAL
HEAT EXCHANGE AREA
NOMINAL WATER FLOW (COOLING/HEATING)
BPHE PRESSURE DROP VS NOMINAL FLOW RATE (C/H)
UNIT PRESSURE DROP VS NOMINAL FLOW RATE
PUMP
TYPE
NOISE LEVEL
TOTAL
UNIT
DIMENSION
FINISH
PIPING
HFC 407C
Capillary Tube
MODEL
NOMINAL COOLING CAPACITY
NOMINAL HEATING CAPACITY
CASING
MATERIAL
TYPE
0-50-100
NET WEIGHT

309 B/C –03/03 A –page 11/28
Cooliing Only
Ambient Temperature °C
28 32 35 40 42
Unit
Size
Leaving water
temperature °C
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
5* 23,4 6,6 22,1 7,3 21,2 7,7 20,1 8,1 18,7 8,7
6* 24,2 7,2 22,9 7,8 22,0 8,2 20,8 8,6 19,5 9,2
724,6 7,5 23,3 8,3 22,4 8,6 21,3 9,1 19,9 9,7
825,0 8,0 23,7 8,7 22,9 9,1 21,7 9,5 20,2 10,0
925,6 8,6 24,2 9,4 23,4 9,7 22,2 10,1 20,8 10,7
M4AC080C
10 26,3 9,3 25,0 10,1 24,2 10,8 22,9 10,8 21,5 11,4
5* 27,8 7,5 26,3 8,2 25,2 8,6 23,9 9,1 22,3 9,7
6* 28,8 8,1 27,2 8,8 26,1 9,2 24,8 9,6 23,2 10,3
729,2 8,5 27,7 9,3 26,7 9,6 25,3 10,1 23,6 10,8
829,8 9,0 28,2 9,7 27,2 10,1 25,8 10,6 24,0 11,2
930,4 9,7 28,8 10,5 27,8 10,8 26,4 11,3 24,8 12,0
M4AC100C
10 31,2 10,5 29,7 11,3 28,8 12,1 27,2 12,1 25,6 12,7
5* 34,8 8,4 32,9 9,2 31,5 9,6 29,9 10,2 27,9 10,9
6* 36,0 9,1 34,0 9,8 32,6 10,3 31,0 10,8 29,0 11,5
736,5 9,6 34,6 10,4 33,4 10,8 31,7 11,4 29,5 12,1
837,2 10,1 35,2 10,9 34,0 11,4 32,2 11,9 30,0 12,6
938,0 10,9 36,0 11,8 34,8 12,2 33,0 12,7 31,0 13,4
M4AC120C
10 39,0 11,8 37,1 12,7 36,0 13,5 34,0 13,6 32,0 14,3
5* 41,7 9,5 39,4 10,4 37,8 10,9 35,8 11,5 33,4 12,3
6* 43,2 10,3 40,8 11,1 39,2 11,6 37,2 12,2 34,8 13,0
743,8 10,8 41,6 11,7 40,0 12,2 38,0 12,8 35,4 13,7
844,6 11,4 42,2 12,3 40,8 12,8 38,6 13,5 36,0 14,2
945,6 12,3 43,2 13,3 41,7 13,8 39,6 14,4 37,2 15,2
M4AC150C
10 46,8 13,3 44,5 14,3 43,2 15,3 40,8 15,3 38,4 16,5
Notes: The power input is for compressors only.

309 B/C –03/03 A –page 12/28
Heat Pump
Cooling Mode
Ambient Temperature °C
28 32 35 40 42
Unit
Size
Leaving water
temperature °C
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
Cooling
Cap.ty
kW
Power
input
kW
5* 22,6 6,8 21,4 7,5 20,5 7,8 19,4 8,3 18,1 8,8
6* 23,4 7,3 22,1 8,0 21,2 8,4 20,1 8,8 18,9 9,4
723,8 7,7 22,5 8,5 21,7 8,8 20,6 9,2 19,2 9,9
824,2 8,1 22,9 8,9 22,1 9,2 20,9 9,7 19,5 10,3
924,7 8,8 23,4 9,6 22,6 9,9 21,5 10,3 20,1 10,9
M4AC080CR
10 25,4 9,5 24,1 10,3 23,4 11,0 22,1 11,0 20,8 11,6
5* 26,9 7,7 25,4 8,4 24,4 8,8 23,1 9,3 21,5 9,9
6* 27,8 8,3 26,3 9,0 25,2 9,4 23,9 9,8 22,4 10,5
728,2 8,7 26,8 9,5 25,8 9,8 24,5 10,3 22,8 11,0
828,8 9,2 27,2 9,9 26,3 10,3 24,9 10,8 23,2 11,5
929,4 9,9 27,9 10,7 26,9 11,1 25,5 11,6 23,9 12,2
M4AC100CR
10 30,2 10,7 28,7 11,5 27,8 12,3 26,3 12,4 24,8 13,0
5* 33,6 8,6 31,8 9,4 30,5 9,8 28,9 10,4 26,9 11,1
6* 34,8 9,3 32,8 10,1 31,5 10,5 29,9 11,0 28,1 11,8
735,3 9,8 33,5 10,6 32,2 11,0 30,6 11,6 28,5 12,4
836,0 10,3 34,0 11,2 32,9 11,6 31,1 12,1 29,0 12,9
936,8 11,2 34,8 12,0 33,6 12,4 31,9 13,0 29,9 13,7
M4AC120CR
10 37,7 12,0 35,9 12,9 34,8 13,8 32,9 13,9 31,0 14,6
5* 40,3 9,7 38,1 10,6 36,6 11,1 34,6 11,7 32,3 12,5
6* 41,7 10,5 39,4 11,4 37,8 11,9 35,9 12,5 33,7 13,3
742,4 11,0 40,2 12,0 38,7 12,5 36,7 13,1 34,2 14,0
843,1 11,7 40,8 12,6 39,4 13,1 37,3 13,7 34,8 14,5
944,1 12,6 41,8 13,6 40,3 14,0 38,3 14,7 35,9 15,5
M4AC150CR
10 45,3 13,6 43,0 14,6 41,7 15,6 39,5 15,7 37,1 16,5
Notes: The power input is for compressors only.

309 B/C –03/03 A –page 13/28
Heat Pump
Heating Mode
Ambient Temperature °C
-504710
Unit
Size
Leaving water
temperature °C
Heating
Cap.ty
kW
Power
input
kW
Heating
Cap.ty
kW
Power
input
kW
Heating
Cap.ty
kW
Power
input
kW
Heating
Cap.ty
kW
Power
input
kW
Heating
Cap.ty
kW
Power
input
kW
35 23,0 6,1 24,4 6,7 26,1 7,3 26,9 7,6 27,4 8,1
40 22,5 6,7 23,8 7,4 25,3 7,8 26,1 8,3 27,1 8,6
45 22,0 6,8 23,3 7,5 24,8 8,3 25,6 8,8 26,6 9,2
50 21,5 7,5 22,8 8,1 24,3 8,7 25,1 9,1 26,0 9,5
M4AC080CR
55 20,5 7,9 21,7 8,6 23,7 9,1 24,2 9,6 25,3 9,7
35 27,1 7,0 28,7 7,8 30,8 8,4 31,7 8,7 32,3 9,3
40 26,5 7,7 28,0 8,5 29,9 9,0 30,8 9,6 31,9 9,9
45 25,9 7,8 27,4 8,7 29,2 9,6 30,2 10,1 31,3 10,6
50 25,3 8,6 26,8 9,4 28,7 10,0 29,6 10,5 30,7 11,0
M4AC100CR
55 24,1 9,1 25,6 9,9 27,9 10,5 28,5 11,0 29,9 11,2
35 32,7 7,9 34,6 8,8 37,0 9,5 38,1 9,8 38,9 10,5
40 32,0 8,7 33,8 9,6 36,0 10,2 37,0 10,8 38,5 11,1
45 31,2 8,8 33,0 9,8 35,2 10,8 36,3 11,4 37,7 11,9
50 30,5 9,7 32,3 10,6 34,5 11,3 35,6 11,9 37,0 12,4
M4AC120CR
55 29,1 10,3 30,9 11,2 33,6 11,9 34,3 12,4 36,0 12,6
35 37,3 9,3 39,5 10,3 42,3 11,2 43,5 11,6 44,4 12,4
40 36,5 10,3 38,6 11,3 41,0 12,0 42,3 12,7 43,9 13,1
45 35,6 10,4 37,7 11,5 40,2 12,8 41,5 13,5 43,0 14,0
50 34,8 11,5 36,9 12,5 39,4 13,3 40,6 14,0 42,2 14,6
M4AC150CR
55 33,2 12,2 35,2 13,2 38,4 14,0 39,1 14,7 41,0 14,9
Notes: The power input is for compressors only.

309 B/C –03/03 A –page 14/28
Technical Data
Correction Factors With Glycol Use
Glycol % Cooling Capacity Water Flow Pressure Drop
10 0.990 1.015 1.06
20 0.980 1.040 1.12
30 0.970 1.080 1.18
40 0.965 1.135 1.24
Water Pressure Drop And Flow Rate
Water Flow Rate Water Pressure Drop
MODEL L/sm³/h kPa Bar
M4AC080C 1.08 3.9 74 0.74
M4AC100C 1.31 4.7 82 0.82
M4AC120C 1.67 6.0 76 0.76
M4AC150C 2.0 7.2 74 0.74
Cooling 1.08 3.9 74 0.74
M4AC080CR Heating 1.14 4.1 72 0.72
Cooling 1.31 4.7 82 0.82
M4AC100CR Heating 1.39 5.0 80 0.80
Cooling 1.67 6.0 76 0.76
M4AC120CR Heating 1.78 6.4 74 0.74
Cooling 2.0 7.2 75 0.45
M4AC150CR Heating 2.11 7.6 73 0.73

309 B/C –03/03 A –page 15/28
Model: M4AC 080C(R)/100C(R)/120C(R)/150C(R)
27 GE
253,5 128 D
C
HP Gauge (SYS2)
LP Gauge (SYS2)
Cable Port(OUT)
Chilled Water Out
Cable Port (IN)
F
B
100
Rc 1 1/4
Chilled Water In
Rc 1 1/4
UNIT:mm
Model
Dimension M4AC080C(R) M4AC100C(R) M4AC120C(R) M4AC150C(R)
A1500 1500 1800 1800
B900 900 1150 1150
C1260 1260 1260 1260
D1190 1190 1190 1190
E297.5 297.5 347.5 347.5
FMounting hole 307.5 307.5 307.5 307.5
GMounting hole 1446 1446 1546 1546

309 B/C –03/03 A –page 16/28
Model M4AC080C/100C Cooling only version
1.87A 1.87A
ENTERING WATER TEMP.SENSOR
PHASE PROTECTOR COMP. HP SWITCH COMP. LP SWITCH
WATER PUMP
DESCRIPTION
COMPRESSOR
SYMBOL
FAN MOTOR
CONTACTOR
SYMBOLDESCRIPTION
FUSE
WATER FLOW SWITCH
RELAY
MAC100C
THERMAL OVERLOAD RELAY AMPS
MAC80C
MODEL
10.5A 11.2A 11.2A
10.5A
OPEN
JP SETTINGS
LEAVING WATER TEMP.SENSOR
RETURN WATER TEMP.SENSOR
ALARM INDICATOR AC/DC SUPPLY
NOTES:
Field Wiring
Factory Wired
CAUTION:DRAWING No.:M08024325305
The setting shown in the diagram is factory set.
OPEN OPEN
SYMBOLDESCRIPTION
If want to activate two way valve interlock function, let JP6 open.
Don't change the JP settings and the value of parameters ( including thermal overload relays)

309 B/C –03/03 A –page 17/28
Model M4AC080CR/100CRHeat Pump version
10.5A 11.2A
THERMAL OVERLOAD RELAY AMPS
MAC100CR
MODEL
MAC80CR
10.5A 11.2A
JP SETTINGS
OPEN
ALARM INDICATOR AC/DC SUPPLY
KM4 is the auxiliary electric heater contactor (field supply part) If want to activate two way valve interlock function, let JP6 open.
1.87A 1.87A
NOTES:
Field Wiring
Factory Wired
CAUTION:
The setting shown in the diagram is factory set
Don't change the JP settings and the value of parameters ( including thermal overload relays).
DEFROST SENSOR 2
DEFROST SENSOR 1
RETURN AIR TEMP.SENSOR
LEAVING WATER TEMP.SENSOR
ENTERING WATER TEMP.SENSOR
????
SYMBOLDESCRIPTION
COMPRESSOR
WATER PUMP
FAN MOTOR
CONTACTOR
SYMBOLDESCRIPTION
PHASE PROTECTOR COMP. HP SWITCH COMP. LP SWITCH
SYMBOL
FUSE
RELAY
DESCRIPTION
FOUR WAY VALVE

309 B/C –03/03 A –page 18/28
Model M4AC120C/150C Cooling only version
RETURNAIRTEMP.SENSOR
ENTERINGWATERTEMP.SENSOR
LEAVINGWATERTEMP.SENSOR
ALARM INDICATOR AC/DC SUPPLY
THERMAL OVERLOAD RELAY AMPS
12.9A 14.4A
SYMBOL SYMBOL
SYMBOL
DESCRIPTION
COMPRESSOR
DESCRIPTION
PHASE PROTECTOR
DESCRIPTION
FUSE
??
WATER PUMP
FAN MOTOR
CONTACTOR
COMP. LP SWITCH COMP. HP SWITCH WATER FLOW SWITCH JP SETTINGS
OPEN Don't change the JP settings and the value of
If want to activate two way valve interlock function, let JP6 open.
Factory Wired
1.04A 1.68A
12.9A 14.4A
3.4A 3.4A
1.04A 1.68A
NOTES:
Field Wiring
OPEN
OPEN
CAUTION:
The setting shown in the diagram is factory set
parameters (including thermal overload relays)

309 B/C –03/03 A –page 19/28
Model:M4AC120CR/150CR Heat Pump version
AC/DC SUPPLY
ALARM INDICATOR
RETURN AIR TEMP.SENSOR
ENTERING WATER TEMP.SENSOR
LEAVING WATERTEMP.SENSOR
DEFORSTSENSOR1
DEFROSTSENSOR2
1.0A 1.68A
3.4A
12.9A
12.9A
THERMAL OVERLOAD RELAY AMPS
MODEL
14.4A
JP SETTINGS
14.4A 3.4A
OPEN
is the auxiliary electric heater contactor (field supply part)
If want to activate two way valve interlock function, let JP6 open.
Don't change the JP settings and the value of
Field Wiring
1.0A
NOTES:
CAUTION:
1.68A
Factory Wired
The setting shown in the diagram is factory set.
parameters (including thermal overload relays)
COMP. LP SWITCH COMP. HP SWITCH PHASE PROTECTOR
WATER PUMP
COMPRESSOR
DESCRIPTION
SYMBOL SYMBOL
CONTACTOR
FAN MOTOR
DESCRIPTION
FOUR WAY VALVE
DESCRIPTIONSYMBOL
FUSE
????
RELAY

309 B/C –03/03 A –page 20/28
Installation
Installation Notice
This equipment must be installed by your dealer or authorized McQuay qualified personnel, and the installation must
satisfy all the following requirements.
Location
In order to achieve unit maximum capacity and long lifeoperation, the location selection should fulfill the following
requirements:
a) The location must be well ventilated, so that air can be drawn in and discharge out efficiently.
Air Intake
Air Intake
Air Intake
Air Discharge
Air discharge
b) Install the unit in such a way that the hot air discharge cannot be drawn in again by itself or other units.
c) Ensure that there is no obstruction to air flow into or out of the unit. Remove obstacles which blocking intake or
discharge air if exist.
Obstacles Blocking Servicing Access
Obstacles Blocking Air Intake
Air
Intake
Air Discharge Air
Intake
Air Discharge
Air Intake
Obstacles blocking air intake
Obstacles blocking servicing access