McQuay MDS030AR Instructions for use

TM - MDS - 2006
Engineered for flexibility and performance.TM
Application Manual
Multi-Digital Scroll Units
Models: MDS030A(R) - MDS060A(R)
MDS080B(R) - MDS300B(R)

c 2004 McQuay International. All Rights Reserved.
is a registered trademark of McQuay in the United States and other countries, licensed and
recognized all over the world. Without prior written consent of McQuay, use of the above-named
trademark for business purposes may constitute a violation of the federal and state laws in the Unites
states and laws of related countries, and remain subject to a charge of trademark infringement and unfair
competition.
This manual is prepared by the Market Department of McQuay s Shenzhen-based factory. Pursuant to
the copyright law, this manual may not be reproduced or otherwise distributed in whole or in part without
prior written permission of McQuay.
We have used our best endeavor to make sure the information contained in this manual is accurate. As
we are always committed to technological improvement, the units and specifications are subject to
change without further notice. In addition, to meet local criteria and customer requirements, we may
modify the units and specifications. Please also take notice that not all the models suit every market.
Discussed in this manual is a product made in China in compliance with the national standard GB/T18837-2002.

CONTENTS
1. Overview
1.1 General Information .........................................................................................................4
1.2 Working Principle & System Principle .............................................................................. 4
1.3 Main Features ................................................................................................................ 10
1.4 Nomenclature ................................................................................................................. 12
1.5 Products Series .............................................................................................................. 14
1.6 Performance Parameter ................................................................................................. 15
1.7 Operating Range ............................................................................................................ 19
1.8 Refnet ............................................................................................................................ 19
1.9 Outline of Indoor Units ................................................................................................... 21
1.10 Outline of Outdoor Units .............................................................................................. 25
2. Unit Control
2.1 Introduction of the Controller .......................................................................................... 27
2.2 Main Functions ............................................................................................................... 27
2.3 Operation of the Controller ............................................................................................. 28
2.4 Software Management System ...................................................................................... 32
2.5 Network Central Control ................................................................................................. 34
2.6 Wiring Diagram ..............................................................................................................35
2.7 Electric Connection ........................................................................................................ 49
2.8 Electric Data ................................................................................................................... 51
3. Selection
3.1 Load Calculation ............................................................................................................52
3.2 Selection of Indoor Units ................................................................................................ 54
3.3 Selection of Outdoor Units ............................................................................................. 55
3.4 Design of Air System ....................................................................................................... 58
3.5 Selection of Refnet Joint ................................................................................................ 63
3.6 Selection of E-EXV Box ................................................................................................. 66
4. Installation
4.1 Outdoor Unit Installation ................................................................................................ 67
4.2 Indoor Unit Installation ................................................................................................... 70
4.3 Refrigerant Piping Design and Installation ..................................................................... 78
4.4 Design, Processing and Installation of Condensated Drain Pipe ................................... 93
5. Testing
5.1 Hardware Diagram and Configuration ........................................................................... 97
5.2 Trial Run ...................................................................................................................... 104
6. Servicing and Maintenance
6.1 User Guide ................................................................................................................... 105
6.2 Servicing and Maintenance .......................................................................................... 106
7. Fault Code and Troubleshooting ...........................................................110
Annexes .......................................................................................................112

-4-
Design & installation Guide For McQuay MDS Multi System
CHAPTER
1
Overview
1.1 General Information
The MDS(Multi Digital Scroll) air conditioning system is operated by a digital compressor
and is accommodated by multiple evaporators (indoor units). It is touted as the next-
generation modular system in the world of high-efficiency air conditioning. lt has undoubt-
edly changed the face of cooling associated with high-storied buildings. It provides a broad
range of different applications for settings such as offices, hotels and schools. With its easy
installation and simple controlling system, the MDS will more than meet the demands of the
air conditioning market.
1.2 Working Principle & System Principle
1.2.1 Working Principle
The beauty of this technology is its inher-
ent simplicity. The standard digital scroll
compressor has a unique feature called
axial compliance. This allows the fixed
scroll to move in the axial direction, by
very small amounts, to ensure that the
fixed and orbiting scrolls are always
loaded together with the optimal force.
This optimal force holding the 2 scrolls
together at all operating conditions en-
sure the high efficiency of Copeland
scrolls. The Digital Scroll operation builds
on this principle.
The Digital Scroll operates in two stages - the "loaded state", when the solenoid valve is normally
closed and "unloaded state", when the solenoid valve is open. During the loaded state the
compressor operates like a standard scroll and delivers full capacity and mass flow. However,
during the unloaded state, there is no capacity and no mass flow through the compressor.
At this stage, let us introduce the concept of a cycle time. A cycle time consists of a "Loaded State"
time and "Unloaded State" time. The duration of these 2-time segments determine the capacity
modulation of the compressor. Example: In a 20 seconds cycle time, if the loaded state time is 10
seconds and the unloaded state time is 10 seconds, the compressor modulation is (10 seconds x
100% + 10 seconds x 0%)/ 20 = 50%. If for the same cycle time, the loaded state time is 15
fixed scroll
(movable in axial direction)
PWM vale
Orbiting scroll
(Rotatable in radial direction)

-5-
Design & installation Guide For McQuay MDS Multi System
seconds and the unloaded state time is 5 seconds, the compressor modulation is 75%. The
capacity is a time averaged summation of the loaded state and unloaded state. By varying the
loaded state time and unloaded state time, any capacity (10%-100%) can be delivered by the
compressor.
Resident system Commerce system
1.2.2 Sketch Map of Installation
PWM valve power off
Valve close
Fixed scroll move downwards
Two scrolls gather together
Loading
PWM valve power on
Valve open
Fixed scroll moves upwards
Two scrolls separate
Unloading
Modulation chamber
Discharge pressure Solenoid valve
Bleed hole
Suction pressure
Unloading
Modulation chamber
Discharge pressure Solenoid valve
Bleed hole
Suction pressure
Loading

-6-
Design & installation Guide For McQuay MDS Multi System
Four-way valve
Outdoor
Filter Filter
Electronic expansion valve
Filter Filter
PWM
LPS
HPS
Cooling flow
Heating flow
Dry filter
indoor
Electronic expansion valve
Check valve
Digital compressor
Outdoor heat exchanger 
Electronic expansion valve
Indoor unit 1Indoor unit n
Accumulator
Liquid receiver
MDS030AR MDS040AR MDS050AR MDS060AR
1.2.3 Diagram of the Unit System
HPS
LPS
PWM
Dry filter
Filter Filter
indoor
Outdoor
Electronic expansion valve
Filter Filter
Outdoor heat exchanger
Digital compressor 
Indoor unit 1
Electronic expansion valve
Indoor unit n
Accumulator
Liquid receiver
MDS030A MDS040A MDS050A MDS060A
Note: The MDS030AR unit excludes the reservoir.
Note: The MDS030A unit excludes the reservoir.

-7-
Design & installation Guide For McQuay MDS Multi System
MDS080BR MDS100BR MDS120BR
Four-way valve
High pressure switch
Standard compressor
Electronic expansion valve
Electronic expansion valve
Check valve
Check valve
Capillary Dry filter
Digital compressor
Low pressure sensor
Filter
Ball valve
Ball valve
Filter
Pressure tapping point
Heat exchanger
Pressure tapping point
Oil separator
Accumulator
MDS150BR
High pressure sensor
Electronic expansion valve
Filter
Low pressure sensor
Pressure tapping point
Filter
Oil separator
Standard compressorStandard compressor Digital compressor
Heat exchanger
High pressure switch
Pressure tapping point
Four-way valve
Capillary Dry filter
Electronic expansion valve
Check valve
Check valve
Ball valve
Ball valve
Accumulator

-8-
Design & installation Guide For McQuay MDS Multi System
MDS200BR MDS220BR MDS240BR
Oil crock
High pressure sensor
Electronic expansion valve
Filter
Low pressure sensor
Pressure tapping point
Filter
Filter
Oil separator
Standard compressorStandard compressorStandard compressor Digital compressor
Heat exchanger
Heat exchanger
High pressure switch
Pressure tapping point
Four-way valve
Four-way
valve
Capillary Dry filter
Electronic expansion valve
Check valve
Check valve
Check valve
Ball valve
Ball valve
Accumulator
MDS180BR
High pressure sensor
Electronic expansion valve
Filter
Low pressure sensor
Pressure tapping point
Filter
Filter
Oil separator
Standard compressorStandard compressor Digital compressor
Heat exchanger
Heat exchanger
High pressure switch
Pressure tapping point
Four-way valve
Four-way
valve
Capillary Dry filter
Electronic expansion valve
Check valve
Check valve
Check valve Ball valve
Ball valve
Ball valve
Accumulator

-9-
Design & installation Guide For McQuay MDS Multi System
Master unit
Slave unit
High pressure sensor
Filter
Filter
Low pressure sensor
Pressure tapping point
Low pressure sensor
Pressure tapping point
Filter
Filter
Oil separator
Oil separator
Standard compressor Standard compressor Standard compressor
Standard compressor Standard compressor
Heat exchanger
Heat exchanger
High pressure switch
Pressure tapping point
High pressure sensor
High pressure switch
Pressure tapping point
Four-way valve
Four-way valve
Capillary Dry filter
Electronic expansion valve
Capillary
Dry filter
Electronic expansion valve
Electronic expansion valve
Electronic expansion valve
Digital compressor
Check valve
Check valve
Check valve
Check valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Accumulator
Accumulator
MDS280BR MDS300BR
MDS260BR
Master unit
Slave unit
High pressure sensor
Filter
Filter
Low pressure sensor
Pressure tapping point
Low pressure sensor
Pressure tapping point
Filter
Filter
Oil separator
Oil separator
Standard compressor
Standard compressor Standard compressor Standard compressor
Heat exchangerHeat exchanger
High pressure switch
Pressure tapping point
High pressure sensor
High pressure switch
Pressure tapping point
Four-way valve
Four-way valve
Capillary Dry filter
Electronic expansion valve
Capillary
Dry filter
Electronic expansion valve
Electronic expansion valve
Electronic expansion valve
Digital compressor
Check valve
Check valve
Check valve
Check valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Ball valve
Accumulator
Accumulator

-10-
Design & installation Guide For McQuay MDS Multi System
1.3 Main Features
1.3.1 Wide Range and Stepless Capacity Modulation
Wide capacity modulation range 10%-100%)
According to changing the ratio of loading time and unloading time, MDS can modulate
the capacity steplessly
Lower the energy consumption and running cost.
1.3.2 Accurate Temperature Control and Quick Response.
The cooling/heating capacity of the indoor units is controlled by the EXV,
which ensure the low temperature fluctuation of 0.3 ;
Stepless capacity modulation;
Quick response to output the capacity (40s).
1.3.3 Simple, Reliable and Long Life
The PWM valve has the longevity of 40 million times
Wide range of capacity modulation makes sure
the start/stop times reduces
Less components
No complicate inverter controller
The compressor has an excellent oil return
performance, there is no need for the oil return
circuit
Even the units run in 10% part load, the MDS
system can be in good stage.
100%
Running ratio of compressors(%)
Inverter system
MDS system
Total capacity of operating indoor units(%)
System control
Environment
Solenoid valve
Digital scroll
Time
Temp
Time
Temp

-11-
Design & installation Guide For McQuay MDS Multi System
Traditional air 
conditioning system
Traditional
inverter system MDS system
Digital 
compressor operating
Digital 
compressor operating
10HP system
HLLoad
Nominal capacity
compressor
100% operating
1.3.4 Energy Saving
The inverter system capacity modulation range is from 30% to 100%, while MDS system
capacity modulation range is from 10% to 100%;
Quick response to the capacity modulation;
Min. power consumption is only 10% of the full load power consumption;
Compared to the inverter system, there is no power consumption of transducer;
Compared to the nominal capacity scroll system, it can save 20% energy consumption.
1.3.5 Flexible Combination of Indoor Units
Max. capacity of the indoor units can reach 130% capacity of the outdoor unit;
Number of the indoor units connected to the outdoor unit depends on the capacity of the outdoor
unit;
One outdoor unit can be connected up to 48 indoor units;
Various types of indoor units are available according to the decoration of the room;
There are various indoor units for option: ceiling cassette, ceiling concealed, high static
pressure duct and ceiling exposed/floor standing.
1.3.6 Reliable Long Piping Connection Design
Max. piping length is 150m (12HP-30HP), max. height between outdoor unit and indoor
unit is 50m (8HP-30HP).
○○
Note OT means the outdoor unit is above the indoor unit. IT means the outdoor unit is below the indoor unit.
Max. piping total Max. piping Height(m)
length(m) length(m) OT IT
12~30HP 350 150 50 40
8~10HP 250 125 50 40
5~6HP 150 70 30 30
4HP 150 70 20 20
3HP 100 50 20 20

-12-
Design & installation Guide For McQuay MDS Multi System
Indoor unit: Ceiling exposed/floor standing unit
1.3.7 Space Saving
Compared to traditional central air conditioning, MDS system is higher centralized, no need
for special equipment room to save more space, and bring more benefits.
1.3.8 Easy to Install and Simple to Maintain
Easy installation
MDS system is simple, and the pipe layout is clear. The site installation is accompanied by
little workload of easy indoor and outdoor units installation and pipe connection. The installa-
tion involves refrigerant piping system, and the maintenance is easy.
Independent system, installed by stages
Easy installation allows the owner to choose a suitable time for the MDS system installa-
tion in a longer period, greatly reducing the time limitation on the air conditioner installation
during the construction stage;
For new projects, installation by stages can reduce lump-sum investment;
For alteration projects, it is easy for the owner to install.
No need for special maintenance
It only involves simple refrigerant piping system , without complex maintenance;
Compared with the water-cooled system, it has no water system. So, there is no need to clean
water pipes, separate contaminant and maintain water system control devices. It is easy to use and
it is not required to assign dedicated personnel to manage and maintain.
Traditional central air conditioning MDS system
1.4 Nomenclature
Indoor unit: ceiling cassette
M CM 050 T - A M A
Design alternation No.
Matching outdoor units: MDS series
Power supply features: A:220V /50Hz
Design serial No.
Cooling capacity No.
Indoor unit: Ceiling exposed/floor standing unit
McQuay
McQuay
Indoor unit: ceiling cassette
Cooling capacity No.
Design serial No.
Power supply features:220V /50Hz
Matching outdoor units:MDS series
Design alternation No.
MCK 030 T - A M A

-13-
Design & installation Guide For McQuay MDS Multi System
Indoor unit: ceiling concealed unit
Hot water heater box
Electric heater box
08-15 means it can be used in MCC008/010/015T
18-30 means it can be used in MCC018/020/025/030T
40-50 means it can be used in MCC040/050T
60 means it can be used in MCC060T
T means that unit can be used in MCC Tseries
Hot water heater box
HW T08-15
HD P1.2 T08-15
18-15 means it can be used in MCC008/010/015T
18-30 means it can be used in MCC018/020/025/030T
40-50 means it can be used in MCC040 050T
60 means it can be used in MCC060T
T means the unit can be used in MCC T series
Heating capacity (kW)
Heating unit: P means the heating unit is PTC
Omitted means the heating unit is electric heating pipe
Electric heater box
MCC 050 T -R (B)/(D)- A M A
McQuay
Ceiling concealed indoor unit
Cooling capacity No.
Design serial No.
Type of connecting pipe:
R-right connecting pipe
L-left connecting pipe
Air return mode:
B-rear air return plenum
D-lower air return plenum
Omitted-no air return plenum
Design alternation No.
Matching outdoor units:
MDS series
Power supply features:
A:220V /50Hz
Air-cooled cooling duct indoor unit
MDB 050 T- A M A
Design serial No.
Cooling capacity No.
Air-cooled cooling duct indoor unit
McQuay
Design alternation No.
Matching outdoor units:MDS series
Power supply features: A:220V /50Hz

-14-
Design & installation Guide For McQuay MDS Multi System
1.5 Products Series
1.5.1 Outdoor Unit
Capacity range
3HP 4HP 5HP 6HP 8HP 10HP 12HP 15HP 18HP 20HP 22HP 24HP 26HP 28HP 30HP
Model
MDS-A
MDS-B
MDS-B
Outdoor unit: MDS unit
MDS 060 AR- FAA
Design serial No.
Cooling capacity No.
McQuay multi digital scroll unit
Description of the unit
Power supply:
A:220V /50Hz F:380V/3N /50Hz
Heat pump (omitted if cooling only)
MEX throttle box
Design serial No.
Pipe mode
Pipe size
MEX - 14 - 3 SA - A
McQuay expansion box
Valve opening size No.
Indoor unit: Wall Mounted Indoor Units
MWM 015 T - A M A
Design alternation No.
Matching outdoor units: MDS series
Power supply features: A:220V /50Hz
Design serial No.
Cooling capacity No.
Indoor unit: Wall Mounted Indoor Units
McQuay
________ MEX:Throttle box (one expansion valve)
________ Nominal diameter value 10
________ 2:1/4 inch
3:3/8 inch
4:1/2 inch
________ Flare fitting & nipple joint
________ Primary design
McQuay
Valve opening size No.
Pipe size:
Pipe mode:
Design serial No.

-15-
Design & installation Guide For McQuay MDS Multi System
1.6 Performance Parameter
1.6.1 Ceiling Concealed
1.5.2 Indoor Products
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.
The above parameters are the parameters of the heat- pump unit.
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.
Model Indoor MCC MCC MCC MCC MCC MCC MCC MCC MCC MCC
unit 008T 010T 015T 018T 020T 025T 030T 040T 050T 060T
Cooling
W2000 2500 3650 4500 5600 6500 7800 10600 12400 14400
capacity
Heating W2200 2600 3700 4700 6100 7400 8900 11600 14500 17300
capacity
Nominal input W 47 47 81 82 82 123 158 276 276 280
Power supply 220V /50Hz
Air High m3/h 450 450 580 800 800 960 1200 1900 1900 2100
flow Medium m3/h 370 370 470 650 650 780 950 1520 1520 1750
Low m3/h 280 280 380 540 540 600 800 1300 1300 1460
ESP Pa 15(0/30/50)
30(15/50/70) 50(15/30/70)
Dimension mm 1030x469x220 1290x490x250 1640x490x250
1900x490x250
Weight kg 22 22 22 25 25 27 28 39 39 45
Sound(High/ dB (A)
31/29/27 31/29/27 34/32/30 35/32/29 35/32/29 37/36/35 42/40/38 47/45/43 47/45/43 48/46/44
medium/Low)
Piping
Liquid pipe mm(in) 6.35 (1/4 )6.35 (1/4 )6.35 (1/4 )9.52 (3/8 )9.52 (3/8 )9.52(3/8 )9.52(3/8 )9.52(3/8 )9.52(3/8 )9.52(3/8 )
size
Gas pipe mm(in) 9.52 (3/8 )9.52 (3/8 )12.7 (1/2 )15.88(5/8 )15.88(5/8 )15.88(5/8 )15.88(5/8 )19.05(3/4 )19.05(3/4 )19.05(3/4 )
Drainage pipe inch R3/4
1.6.2 High Static Pressure Duct Unit
Model Indoor unit Indoor unit MDB050T MDB060T
Nominal cooling capacity W 12500 14000
Nominal heating capacity W 14000 16500
Nominal input W 615 789
Power supply 220V /50Hz
Air flow(High/Medium/Low) m3/h 2550/2040/1650 3000/2540/1920
ESP Pa 100 100
Dimension mm 1230 910 350 1430 910 350
Weight kg 69 75
Sound Level(High/Medium/Low) dB(A) 58/55/52 60/56/53
Liquid pipe outside diameter mm(in) 9.52(3/8 )9.52(3/8 )
Piping size Gas pipe outside diameter mm(in) 19.05(3/4 )19.05(3/4 )
Drainage pipe inch R3/4
Capacity range
0.8HP 1.0HP 1.5HP 1.8HP 2.0HP 2.5HP 3.0HP 4.0HP 5.0HP 6.0HP
MCC
MCK
MCM
MDB
MWM
Model

-16-
Design & installation Guide For McQuay MDS Multi System
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.
1.6.4 Ceiling Exposed / floor Standing
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.
1.6.3 Ceiling Cassette
Model Indoor unit MCK010T MCK015T MCK018T MCK020T MCK025T MCK030T MCK040T MCK050T
Nominal cooling capacity W2800 3600 4500 5400 6500 7500 10000 12500
Nominal heating capacity W3200 3900 5000 5900 7200 8000 11000 13500
Nominal input W 26 34 36 42 75 84 110 140
Power supply 220V /50Hz
High m3/h 520 600 650 700 1200 1300 1360 1650
Air flow Medium m3/h 430 520 550 600 1100 1060 1200 1450
Low m3/h 380 430 400 530 960 850 1110 1350
Dimension mm 930X930X278 930X930X363
Weight kg 26 30 39.5
Sound(High/medium/Low) dB(A) 29/28/26 32/30/27 38/34/30 39/35/31 42/40/38 45/43/41 46/44/42 48/45/42
Piping Liquid pipe mm(in) 6.35(1/4 )9.52(3/8 )9.52(3/8 )
Size Gas pipe mm(in)
9.52(3/8 )12.7(1/2 ) 15.8(5/8 )19.05(3/4 )
Drainage pipe mm 20.5
Model Indoor unit MCM020T MCM030T MCM050T
Cooling capacity W 5800 7500 12500
Heating capacity W 5800 8000 13500
Air flow(High/Medium/Low) m3/h 1100/970/750 1300/1100/870 1850/1550/1200
Rated power input W 81 116 161
Power supply 220V /50Hz
Dimension mm 1214x670x214 1214x670x249 1714x670x249
Weight kg 39 44 44
Sound(High/medium/Low) dB(A) 48/45/42 50/46/43 52/48/44
Liquid pipe outside diameter mm(in) 9.52(3/8 )9.52(3/8 )9.52(3/8 )
PiPing Gas pipe outside diameter mm(in) 15.88(5/8 )15.88(5/8 )19.05(3/4 )
Size Drain pipe mm 20.5
Model Indoor unit MWM008T MWM010T MWM015T MWM020T MWM025T
Cooling capacity W2200 2780 3520 5400 6500
Heating capacity W2200 2780 3520 5400 6500
Air flow(High/Medium/Low) m3/h 460/330/270 510/420/320 590/500/370 860/720/590 1100/790/680
Rated power input W24 36 404868
Power supply 220V~/50Hz
Dimension(WxDxH) mm 799x198x260 899x198x260 899x198x260 1062x222x3041062x222x304
Weight kg 25 30 35 36 36
Sound(High/medium/Low) dB(A) 39/34/28 39/34/28 42/36/29 44/40/35 49/43/40
PiPing Liquid pipe outside diameter mm(in.) 6.35(1/4) 6.35(1/4) 6.35(1/4) 6.35(1/4) 9.52(3/8)
Size Gas pipe outside diameter mm(in.) 9.52(3/8) 9.52(3/8) 12.7(1/2) 15.88(5/8) 15.88(5/8)
Drain pipe 20.5
1.6.5 Wall Mounted Indoor Units
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.

-17-
Design & installation Guide For McQuay MDS Multi System
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The specification parameters may change with the product improvement; Please take the parameters listed in the nameplate
of the unit as the reference parameter.
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The specification parameters may change with the product improvement; Please take the parameters listed in the nameplate
of the unit as the reference parameter.
Model Unit MDS050A MDS050AR MDS060A MDS060AR
Nominal cooling capacity kW 12.5 12.5 15 15
Nominal heating capacity kW - 13.5 - 17
Power supply 380V/3N~/50Hz
Dimension (L x W x H) mm 1058x430x1044 1058x430x1247
Weight kg 117 120 123 130
Cooling rated power input kW 4.4 4.4 5.0 5.0
Cooling rated current A 8.4 8.4 9.6 9.6
Heating rated power input kW - 4.2 - 4.23
Heating rated current A - 8.0 - 8.8
Refrigerant R22
Type of connecting pipe
Liquid pipe Copper flare fitting & nipple joint
Gas pipe Copper flare fitting & nipple joint
Piping size Liquid pipe (mm/in) 9.52(3/8 )
Gas pipe (mm/in) 19.05(3/4 )
1.6.6 MDS-A Specification(Outdoor Unit)
Model Unit MDS030A MDS030AR MDS040A MDS040AR MDS050A MDS050AR MDS060A MDS060AR
Nominal cooling capacity kW 8.5 8.5 10 10 12.5 12.5 14.5 14.5
Nominal heating capacity kW - 9.0 - 11.5 - 13.5 - 16.5
Power supply 220V~/50Hz
Dimension (L x W x H) mm
Weight kg 82 85 112 115 117 120 123 130
Cooling rated power input kW 3.0 3.0 3.5 3.6 4.4 4.4 5.0 5.0
Cooling rated current A13.6 13.6 15.9 15.9 20 20 22.8 22.8
Heating rated power input kW - 2.5 - 3.4 - 4.2 - 4.2
Heating rated current A- 11.4 - 15.5 - 19 - 20.3
Refrigerant
R22
Type of connecting pipe copper flare fitting & nipple joint
Liquid pipe (mm/in)
Gas pipe (mm/in)
840x408x900 1058x430x1044 1058x4230x1247
9.52(3/8 )9.52(3/8 )9.52(3/8 )9.52(3/8 )
15.88(5/8 )19.05(3/4 )19.05(3/4 )19.05(3/4 )
Piping size

-18-
Design & installation Guide For McQuay MDS Multi System
1.6.7 MDS-B Specification (Outdoor Unit)
Model MDS MDS MDS MDS MDS MDS MDS MDS MDS MDS MDS MDS
080B 080BR 100B 100BR 120B 120BR 150B 150BR 180B 180BR 200B 200BR
Nominal cooling capacity kW 24.5 24.5 28.0 28.0 32.5 32.5 40.0 40.0 47.5 47.5 50.0 50.0
Nominal heating capacity kW - 26.0 - 30.0 - 34.0 - 43.0 - 50.0 - 53.0
Power supply 380V/3N /50Hz
Sound level dB(A) 62 62 64 64 66 66 67 67 66 66 66 66
Dimension (Lx W x H) mm 990x840x1840
1290x840x1840 1990x840x1840
Weight kg 275 290 285 300 290 305 355 370 520 550 560 590
Cooling rated power input kW 7.5 7.5 8.5 8.5 9.8 9.8 12.9 12.9 14.1 14.1 15.2 15.2
Cooling rated current A 14.6 14.6 16.8 16.8 18.8 18.8 23.1 23.1 28.2 28.2 31.1 31.1
Heating rated power input kW - 7.2 - 8.3 - 9.0 - 11.1 - 13.2 - 14.7
Heating rated current A - 13.6 - 15.7 - 16.7 - 22.6 - 27.1 - 29.4
Refrigerant R22
Type of con- Gas side Welding & flange
necting pipe Liquid side Flare fitting & nipple joint
Liquid pipe mm(in) 12.7(1/2 )15.88(5/8 )
Gas pipe mm(in) 28.6(1-1/8 )34.9(1-3/8 )
Notes:
The nominal cooling capacity is gotten in the return air temperature of 27 /19 , and the ambient temperature of 35 /24 .
The nominal heating capacity is gotten in the return air temperature of 20 /15 , and the ambient temperature of 7 /6 .
The sound level is gotten from the test room, it may differ in actual use due to the ambient noise or other causes.
Model MDS MDS MDS MDS MDS MDS MDS MDS MDS MDS
220B 220BR 240B 240BR 260B 260BR 280B 280BR 300B 300BR
Nominal coolingcapacity kW 55.0 55.0 65.0 65.0 70.0 70.0 75.0 75.0 80.0 80.0
Nominal heating capacity kW - 58.0 - 68.0 - 75.0 - 80.0 - 85.0
Power supply 380V/3N /50Hz
Sound level dB(A) 66 66 68 68 68 68 69 69 69 69
Dimension (L x W x H) mm 1990x840x1840
2280x840x1840 2580x840x1840
Weight kg 560 590 570 600 645 675 710 740 710 740
Cooling rated power input kW 16.7 16.7 19.8 19.8 21.3 21.3 22.8 22.8 26.2 26.2
Cooling rated current A 32.7 32.7 38.5 38.5 40.0 40.0 42.5 42.5 46.5 46.5
Heating rated power input kW - 16.2 - 18.5 - 20.9 - 22.0 - 23.6
Heating rated current A - 31.0 - 33.8 - 37.2 - 41.0 - 43.1
Refrigerant R22
Type of con- Gas side Welding & flange
necting pipe Liquid side Flare fitting &nipple joint
Liquid pipe mm(in) 19.05(3/4 )19.05(3/4 )
Gas pipe mm(in) 38.1(1-1/2 )41.3(1-5/8 )

-19-
Design & installation Guide For McQuay MDS Multi System
1.7 Operating Range
Note The table is gotten based on the equivalent length of 16m and the height is 0 m.
1.8 Refnet
1.8.1 YType
Unit mm
Length(mm) Diameter (mm) Diameter (mm) Diameter (mm)
Refnet
AB C D
E(outer
FGH
I(outer
JKLM
N(outer
OPQR
model
diameter diameter diameter
MDS-Y1 553 172 293 120 28.6 28.9 25.7 22.5 28.6 28.9 25.7 22.5 19.3 22.2 19.3 16.1 12.9 9.7
MDS-Y2 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 12.7 12.9 9.7 6.5
MDS-Y3 420 142 223 80 15.88 16.1 12.9 9.7 12.7 12.9 9.7 6.5 15.88 16.1 12.9 9.7
MDS-Y4 493 142 223 80 22.2 22.5 19.3 16.1 19.1 19.3 16.1 12.9 9.7 19.1 19.3 16.1 12.9

-20-
Design & installation Guide For McQuay MDS Multi System
1.8.2 C Type
Unit: mm
Type: MDS-C1
Type: MDS-Y5
Unit: mm