McQuay MDS030AR, MDS030A, MDS060A, MDS080BR, MDS300B Applications Manual

...

TM - MDS - 2006

Engineered for ﬂexibility and performance.

Application Manual

Multi-Digital Scroll Units

Models: MDS030A(R) - MDS060A(R) MDS080B(R) - MDS300B(R)

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

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Design & installation Guide For McQuay MDS Multi System

CHAPTER

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)

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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

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

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Design & installation Guide For McQuay MDS Multi System

Four-way valve

Outdoor

Filter Filter

Electronic expansion valve

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

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.

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Design & installation Guide For McQuay MDS Multi System

MDS080BR MDS100BR MDS120BR

Four-way valve

High pressure switch

Standard compressor

Electronic expansion valve

Check valve

Capillary Dry filter

Digital compressor

Low pressure sensor

Filter

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

Ball valve

Accumulator

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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

Oil separator

Standard compressorStandard compressorStandard compressor Digital compressor

Heat exchanger

High pressure switch

Pressure tapping point

Four-way valve

Four-way

valve

Capillary Dry filter

Electronic expansion valve

Check valve

Ball valve

Accumulator

MDS180BR

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

Four-way

valve

Capillary Dry filter

Electronic expansion valve

Check valve

Ball valve

Accumulator

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Design & installation Guide For McQuay MDS Multi System

Master unit

Slave unit

High pressure sensor

Filter

Low pressure sensor

Pressure tapping point

Low pressure sensor

Pressure tapping point

Filter

Oil separator

Standard compressor Standard compressor Standard compressor

Standard compressor Standard compressor

Heat exchanger

High pressure switch

Pressure tapping point

High pressure sensor

High pressure switch

Pressure tapping point

Four-way valve

Capillary Dry filter

Electronic expansion valve

Capillary

Dry filter

Electronic expansion valve

Digital compressor

Check valve

Ball valve

Accumulator

MDS280BR MDS300BR

MDS260BR

Master unit

Slave unit

High pressure sensor

Filter

Low pressure sensor

Pressure tapping point

Low pressure sensor

Pressure tapping point

Filter

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

Capillary Dry filter

Electronic expansion valve

Capillary

Dry filter

Electronic expansion valve

Digital compressor

Check valve

Ball valve

Accumulator

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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

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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

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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

Indoor unit: ceiling cassette

Cooling capacity No.

Design serial No.

Power supply features:220V

/50Hz

Matching outdoor units:MDS series

Design alternation No.

M CK 030 T - A M A

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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 T series

Hot water heater box

HW T 08-15

HD P 1.2 T 08-15

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

M CC 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

M DB 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

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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

Outdoor unit: MDS unit

MDS 060 A R- F AA

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

M WM 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.

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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

2000 2500 3650 4500 5600 6500 7800 10600 12400 14400

capacity

Heating

2200 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 m

/h 450 450 580 800 800 960 1200 1900 1900 2100

flow Medium m

/h 370 370 470 650 650 780 950 1520 1520 1750

Low m

/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) m

/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

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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

W 2800 3600 4500 5400 6500 7500 10000 12500

Nominal heating capacity

W 3200 3900 5000 5900 7200 8000 11000 13500

Nominal input W 26 34 36 42 75 84 110 140

Power supply 220V

/50Hz

High m

/h 520 600 650 700 1200 1300 1360 1650

Air flow Medium m

/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) m

/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 W 2200 2780 3520 5400 6500 Heating capacity W 2200 2780 3520 5400 6500 Air flow(High/Medium/Low) m

/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.

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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

A 13.6 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

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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 k W - 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 Y Type

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

-21-

Design & installation Guide For McQuay MDS Multi System

1.9 Outline of Indoor Units

1.9.1 MCK010 050T

B D

OD ͺ9.7

204

80 8080

OD ͺ12.9

OD ͺ16.1

OD ͺ19.3

250

550

Refnet joint type ͺ(mm)

Refnet 

joint type

MDS-C2

MDS-C3

28.6

A(outer

diameter)

25.4

28.9

B

25.7

C

22.5

D

19.3

19.5

16.1

E

Four places of silver & copper brazed

Unit: mm

Type: MDS-C2/C3

Model A B C D E F G H I J K L M

MCK010 020T

820 875 548 820 278 250 28 930 930 642 622 555 555

MCK025 050T

820 875 548 820 363 335 28 930 930 642 622 555 555

-22-

Design & installation Guide For McQuay MDS Multi System

1.9.2 MDB050T

350

340

823

702

1063

1032

998

957

995

1230

6-11.5x20



302

286

823

910

177

173

1.9.3 MDB060T

1430

350

302

286

823

910

177

173

1157

1195

1232

1198

1263

340

702

823

6-11.5x20

Unit: mm

-23-

Design & installation Guide For McQuay MDS Multi System

1.9.4 MCC008 010 015 018 020 025 030 040 050 060T

1.9.5 MCM020T MCM030T MCM050T

H H

Unit: mm

Model A B C D E F G H J K L M N

MCM020T 1174 75 1082 68 58 156 1214 57 670 216 319 879 517

MCM030T 1174 75 1082 68 93 156 1214 57 670 216 319 879 517

MCM050T 1674 75 1582 68 93 156 1714 57 670 216 319 1379 517

253

141

151

A B C

5218737

Model A B C D E F G H I J

No.of fans

MCC008T 690 722 1054 751 39 210 469 118 9 220 2

MCC010T 690 722 1054 751 39 210 469 118 9 220 2

MCC015T 690 722 1054 751 39 210 469 118 9 220 2

MCC018T 950 981 1314 1005 32 248 490 81 14 251 2

MCC020T 950 981 1314 1005 32 248 490 81 14 251 2

MCC025T 950 981 1314 1005 32 248 490 81 14 251 2

MCC030T 950 981 1314 1005 32 248 490 81 14 251 2

MCC040T 1300 1331 1664 1355 32 248 490 81 14 251 3

MCC050T 1300 1331 1664 1355 32 248 490 81 14 251 3

MCC060T 1560 1591 1924 1615 32 248 490 81 14 251 4

-24-

Design & installation Guide For McQuay MDS Multi System

1.9.6 Auxiliary Heating Coil

Model A B C D

HWT08-15 762 704 732 818

HWT18-30 1022 964 992 1078

HWT40-50 1372 1314 1342 1438

HWT60 1632 1574 1602 1688

Unit: mm

1.9.7 Auxiliary Electric Heating Box

Unit: mm

Water inlet

Water outlet

Rc3/4 taper pipe threads 



167

237

119

143

221

long hole for Mounting 4 - 10ġ20

163

3333

161

222

8-6x10

long hole for Mounting 4 - 10ġ20

38 38

173

1104

Power supply cable inlet hole

237

Model A B C D

HDP1.2T08-15/HDP2.4T08-15 762 704 732 844

HDP2.4T18-30/HDP3.6T18-30 1022 964 992 1104

HDP2.4T40/HDP3.6T40/HDP4.8T40-50/HDP7.2T40-50 1372 1314 1342 1454

HDP5.4T60/HDP7.2T60/HDP10.8T60 1632 1574 1602 1714

-25-

Design & installation Guide For McQuay MDS Multi System

1.10 Outline of Outdoor Units

1.10.1 MDS030A(R)

1.10.2 MDS040A(R) MDS050A(R) MDS060A(R)

Unit: mm

Model H1 H2 MDS040A(R) 1024 1044 MDS050A(R) 1024 1044 MDS060A(R) 1222 1242

840

590

900

460

4-12x18

125

378

318

408

330

240

124

6760

390

816

1006

128

11594

356

430

4-15

-26-

Design & installation Guide For McQuay MDS Multi System

1.10.3 MDS080B(R) MDS100B(R) MDS120B(R) MDS150B(R)

265

1575

Amplify here A-A

A-A

8-14x20 screw hole

(for setting)

170

845

877

840

1840

539

1.10.4 MDS180B(R) MDS200B(R) MDS220B(R) MDS240B(R)

101 101

845

45 45

265

1575

1840

170 170

4-14x20 screw hole

(for setting)

1.10.5 MDS260/280/300B(R) are Combined Units,Made up by a Master Unit and a Slave Unit

Unit: mm

Model A B MDS080B(R) 900 990 MDS100B(R) 900 990 MDS120B(R) 900 990 MDS150B(R) 1200 1290

Model Master unit+Slave unit D MDS260B(R) MDS120B(R)+MDS150B(R)S 990+10+1290 MDS280B(R) MDS150B(R)+MDS130B(R)S 1290+10+1290 MDS300B(R) MDS150B(R)+MDS150B(R)S 1290+10+1290

Unit: mm

Model C D MDS180B(R) 950 1990 MDS200B(R) 950 1990 MDS220B(R) 950 1990 MDS240B(R) 950 1990

-27-

Design & installation Guide For McQuay MDS Multi System

CHAPTER

Unit Control

2.1 Introduction to the Controller

MDS system is controlled by the micro-computer. Several types of controller are available,

including wireless controller, wire controller, wire controller + remote controller and central

controller. One wireless controller can control one unit, one wire controller can control one unit

or up to 48 units, while central controller can control up to 1536 units (32 groups).

2.2 Main Functions

Cooling./heating/auto/air supply/dehumidity mode are available

LCD wired controller and remote control are available, or remote control only

Digital scroll compressor is used for load balancing to reduce the start/stop times of the

constant-capacity compressor.

Electronic expansion valve is used to control the refrigerant flow

One outdoor unit can connect up to 48 indoor units

Internetworking control is available

Both the indoor and outdoor units have three-speed

Timer for ON/OFF

Energy saving can be setting when the unit is running in cooling or heating condition

High/low pressure protection for the compressor

Overload protection for the fan motor in indoor unit and outdoor unit

Anti-icing function for the coil of indoor unit

Function of auto restart after power

Auto defrost and manual defrost can be set

Auto check function for the sensor malfunction

Overheat protection for the coil of indoor unit

Three minutes delayed protection when auto restart after power failure

Malfunction indicating

Temperature unit can be or oF.

-28-

Design & installation Guide For McQuay MDS Multi System

2.3 Operation of the Controller

2.3.1 Main Features

Both wired controller (using the key on board) and remote controller (equipped with infrared receiver

to receive the order from the remote controller ) to control the unit, and to perform such functions as

parameter setting, working mode setting, status display and malfunction indicating.

Features:

Working mode:

Cooling only unit: Cooling/air supply/dehumidity;

Heat pump unit: Cooling/heating/air supply/dehumidity.

Indoor units have several speed: Auto/ Low/ Medium/ High.

Temperature setting range: 16 /61 oF 30 /78 oF.

Timer for ON/OFF. Max. time is 24 hours.

Sleep.

Auxiliary electric heater & hot water heater control and the wind wing function.

LCD indicator is available to slow the setting temperature, working mode, real time, week, and

status of the units.

2.3.2 Operation of the Wired Controller

Buttons on the wired controller panel

POWER

RUN

Reset button

Fan M ode

Sleep

Heating/

wind wing

CLK button

Timer

Tem perature

ON/OFF

LCD

vision window

Operation manual

The omitted parameter

When the function of auto restart after power failure is not active: The unit is OFF and the temp

is 24 /75 oF cooling mode, high speed, no sleep function, no defrost, no wind wing, no

electric heater.

When the function of auto restart after power failure is active: the unit is the same as that before

power failure.

Temp setting

In normal mode condition, press

or to increase or reduce the temp by 1 or 1 oF.

Temp adjustment range is 16-30

(or 61-86 oF). When the temp reach the upper limit or floor

limit, the

or is invalid.

-29-

Design & installation Guide For McQuay MDS Multi System

Temp unit setting

There is a switch on the PCB board. When switch OP1 is ON, the unit is

; when it is OFF, the

unit is oF.Alternate method is as follows: Press fan key and last for 5 seconds in the normal

condition, the temp unit setting will be successful and there will be a buzzer to indicate.

Real time setting

Press CLK to enter, the first time is week setting and indicate its icon, press or

to adjust the week from Sunday to Saturday. If there is no press on any key within 5 seconds,

the unit will exit from the real time setting and back to the normal status. If you press CLK one

more time within 5 seconds, the setting will be OK and it is the real time setting icon, as well as

the light is twinkling. At this time, you can press

to increase the hour while press to

increase the minute. If there is no press on any key within 5 seconds, the unit will exit from the

real time setting and the time setting is valid. If you want to confirm the setting, you need to press

CLK one more time. If any other key is press during the setting, the system will exit and back

to the normal condition without saving

Mode setting

When the unit is in off status, you can press Mode to enter and the current mode is twinkling.

The mode will be changed when you press Mode one more time. The mode changing

sequence is as follows:

When outdoor unit is OFF:

Heat pump: Cooling ,heating, air supply, dehumidifying, cooling

Cooling only: Cooling, air supply, dehumidifying, cooling

When outdoor is in cooling condition: Cooling, air supply, dehumidifying, cooling

When outdoor is in heating condition: Heating, air supply, heating

Note: In one system, the follows are not available: some units are in cooling condition while the other

is in heating condition.

Air flow setting

In normal condition, when the Fan key is pressed, the air flow will be changed as the following

sequence: High, Auto, Low, Medium, High. When the unit is in air supply condition, there is no

Auto function.

Sleep

Press Sleep key, the icon will be ON or OFF.

Setting of auto restart after power failure

There is a switch on the PCB board to fulfill the setting of auto restart after power failure.

When OP2 is set

ON , then this function is active and the icon is shown on the LCD.

Manual defrost

When the unit runs in heating mode condition, press

Heater key and last for 5 seconds, you

will enter manual defrost mode , and Defrost mode is shown on the LCD. When it is auto

defrost, Defrost mode is also shown on the LCD and it will disappear when the defrost

finishes.

-30-

Design & installation Guide For McQuay MDS Multi System

Timer setting

Press

Timer to enter timer setting (When the unit is ON, it can only be set to OFF;

When the unit isOFF , it can only be set to ON) and last timer will be shown on the LCD.

If there is no press on any key within 5 seconds, it will exit and cancel the timer setting at

the same time. During this 5 seconds, press

to increase the hour while

press to increase the minutes, please press Timer within 5 seconds

to confirm the setting.When it is timer setting, the system will show the real time and the

setting time on the LCD. When the setting time is reaching, the unit will be Power on or off,

and the timer setting function is cancel. When you need the timer setting function, you

need to reset.

Keyboard locked and unlocked setting

Press Sleep and last for 5 seconds, the keyboard will be alter between locked and

unlocked. When it is locked, a icon will be shown on the LCD. During the locked stage, only

the ON/OFF keyboard is valid.

ON/OFF setting

Press ON/OFF keyboard, the unit will be alter between ON and OFF, and a relative

icon will be shown on the LCD.

Reset

This keyboard is used to restart the unit because of some uncertain factors.

Remote controller

The remote controller can be used with the wire controller and it has the same

keyboard as the wire controller, But the keyboard

Fan , Sleep , Heater do not

have the second function.

Central control

The units can be central controlled by the computer or centralized controller. When it is

locked, the keyboard on the wire controller is invalid and the key icon is twinkling. It can only

be unlocked by the computer or by the centralized controller. When it is central control, the

wire controller can communicate with the computer and the centralized controller.

+ 86 hidden pages

McQuay MDS030AR, MDS030A, MDS060A, MDS080BR, MDS300B Applications Manual

Specifications and Main Features

Frequently Asked Questions

User Manual