McQuay MDS030AR Applications Manual
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McQuay MDS030AR Applications Manual

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

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Summary of Contents for McQuay MDS030AR

  • Page 1 Application Manual TM - MDS - 2006 Multi-Digital Scroll Units Models: MDS030A(R) - MDS060A(R) MDS080B(R) - MDS300B(R) Engineered for flexibility and performance.
  • Page 2 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.

  • Page 3: Table Of Contents

    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 ..........................

  • Page 4: Overview

    Design & installation Guide For McQuay MDS Multi System C H A P T E R 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.
  • Page 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.
  • Page 6 Design & installation Guide For McQuay MDS Multi System 1.2.3 Diagram of the Unit System MDS030A MDS040A MDS050A MDS060A Outdoor Filter Filter Electronic expansion valve indoor Liquid receiver Filter Filter Dry filter Electronic expansion valve Note: The MDS030A unit excludes the reservoir.
  • Page 7 Design & installation Guide For McQuay MDS Multi System MDS080BR MDS100BR MDS120BR Ball valve Four-way valve Filter Pressure tapping point Low pressure sensor High pressure switch Pressure tapping point Check valve Accumulator Check valve Standard compressor Digital compressor Ball valve...
  • Page 8 Design & installation Guide For McQuay MDS Multi System MDS180BR Ball valve Check valve Filter Filter Ball valve Four-way Four-way valve valve High pressure sensor Pressure tapping point High pressure switch Low pressure sensor Pressure tapping point Check valve Accumulator...
  • Page 9 Design & installation Guide For McQuay MDS Multi System MDS260BR Ball valve Master unit Filter Four-way valve Pressure tapping point Check valve Low pressure sensor High pressure sensor High pressure switch Pressure tapping point Accumulator Ball valve Check valve Standard compressor...

  • Page 10: Main Features

    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.
  • Page 11 Design & installation Guide For McQuay MDS Multi System 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;...

  • Page 12: Nomenclature

    Design & installation Guide For McQuay MDS Multi System 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. Traditional central air conditioning MDS system 1.3.8 Easy to Install and Simple to Maintain...
  • Page 13 Design & installation Guide For McQuay MDS Multi System Indoor unit: ceiling concealed unit M CC 050 T -R (B)/(D)- A M A McQuay Ceiling concealed indoor unit Cooling capacity No. Design serial No. Design alternation No. Type of connecting pipe:...

  • Page 14: Products Series

    Design & installation Guide For McQuay MDS Multi System 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.

  • Page 15: Performance Parameter

    Design & installation Guide For McQuay MDS Multi System 1.5.2 Indoor Products Capacity range Model 0.8HP 1.0HP 1.5HP 1.8HP 2.0HP 2.5HP 3.0HP 4.0HP 5.0HP 6.0HP 1.6 Performance Parameter 1.6.1 Ceiling Concealed Indoor Model unit 008T 010T 015T 018T 020T 025T...
  • Page 16 Design & installation Guide For McQuay MDS Multi System 1.6.3 Ceiling Cassette Model MCK010T MCK015T MCK018T MCK020T MCK025T MCK030T MCK040T MCK050T Indoor unit Nominal cooling capacity 2800 3600 4500 5400 6500 7500 10000 12500 Nominal heating capacity 3200 3900 5000...
  • Page 17 Design & installation Guide For McQuay MDS Multi System 1.6.6 MDS-A Specification(Outdoor Unit) Model Unit MDS030A MDS030AR MDS040A MDS040AR MDS050A MDS050AR MDS060A MDS060AR Nominal cooling capacity 12.5 12.5 14.5 14.5 Nominal heating capacity 11.5 13.5 16.5 Power supply 220V~/50Hz 840x408x900...
  • Page 18 Design & installation Guide For McQuay MDS Multi System 1.6.7 MDS-B Specification (Outdoor Unit) Model 080B 080BR 100B 100BR 120B 120BR 150B 150BR 180B 180BR 200B 200BR Nominal cooling capacity 24.5 24.5 28.0 28.0 32.5 32.5 40.0 40.0 47.5 47.5 50.0...

  • Page 19: Operating Range

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

  • Page 21: Outline Of Indoor Units

    Design & installation Guide For McQuay MDS Multi System Type: MDS-C2/C3 12.9 16.1 Four places of silver & copper brazed 19.3 Refnet joint type (mm) Refnet joint type A(outer diameter) MDS-C2 28.6 28.9 25.7 22.5 19.5 MDS-C3 25.4 25.7 22.5 19.3...
  • Page 22 Design & installation Guide For McQuay MDS Multi System 1.9.2 MDB050T 6-11.5x20 1032 1063 1230 Unit: mm 1.9.3 MDB060T 1195 1157 6-11.5x20 1198 1232 1263 1430 Unit: mm -22-...
  • Page 23 Design & installation Guide For McQuay MDS Multi System 1.9.4 MCC008 010 015 018 020 025 030 040 050 060T Unit: mm Model No.of fans MCC008T 1054 MCC010T 1054 MCC015T 1054 MCC018T 1314 1005 MCC020T 1314 1005 MCC025T 1314 1005...
  • Page 24 Design & installation Guide For McQuay MDS Multi System 1.9.6 Auxiliary Heating Coil Water outlet Rc3/4 taper pipe threads Water inlet long hole for Mounting 4 - 10 20 Unit: mm Model HWT08-15 HWT18-30 1022 1078 HWT40-50 1372 1314 1342...

  • Page 25: Outline Of Outdoor Units

    Design & installation Guide For McQuay MDS Multi System 1.10 Outline of Outdoor Units 1.10.1 MDS030A(R) 4-12x18 Unit: mm 1.10.2 MDS040A(R) MDS050A(R) MDS060A(R) 4- 15 1006 Unit: mm Model MDS040A(R) 1024 1044 MDS050A(R) 1024 1044 MDS060A(R) 1222 1242 -25-...
  • Page 26 Design & installation Guide For McQuay MDS Multi System 1.10.3 MDS080B(R) MDS100B(R) MDS120B(R) MDS150B(R) 8-14x20 screw hole (for setting) Amplify here A-A Unit: mm Model MDS080B(R) MDS100B(R) MDS120B(R) MDS150B(R) 1200 1290 1.10.4 MDS180B(R) MDS200B(R) MDS220B(R) MDS240B(R) 4-14x20 screw hole (for setting)

  • Page 27: Unit Control

    Design & installation Guide For McQuay MDS Multi System C H A P T E R 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.

  • Page 28: Operation Of The Controller

    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.
  • Page 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 F.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.
  • Page 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.
  • Page 31 Design & installation Guide For McQuay MDS Multi System 2.3.3 Wire Control Panel Fan ON/OFF Fan ON/OFF Fan ON/OFF Fan ON/OFF Fan ON/OFF Temp. Temp. Temp. Temp. Temp. Fan speed Sleep Sleep Sleep Heat Sleep Heat Sleep Timer Mode Timer...

  • Page 32: Software Management System

    Design & installation Guide For McQuay MDS Multi System 2.4 Software Management System 2.4.1 Real-time Monitor Software System monitoring software: The real-time MDS unit monitoring software features powerful functions, including indoor monitoring, system monitoring, loop monitoring and service monitoring. With it, the user or service debugging personnel can view detailed unit parameters and have a deep understanding of the unit operation.
  • Page 33 Design & installation Guide For McQuay MDS Multi System Loop monitoring* Service monitoring* Select and view the outdoor unit s system Display the current operation parameters figure, operation parameters and the operation and history record curve of indoor/outdoor parameters of all indoor units.

  • Page 34: Network Central Control

    MDS system features powerful fault display and query function greatly saving the maintenance time and costs. The real time monitor software of MDS is developed by McQuay and has huge performance. It can monitor each unit in the system and set the parameter in accordance with the requirement.

  • Page 35: Wiring Diagram

    Design & installation Guide For McQuay MDS Multi System 2.6 Wiring Diagram 2.6.1 Wiring Diagram of Indoor Units Model MCC008/010/015/018/020/025/030/040/050/060T SW-PB LINE KEY1 NEUTRAL Transformer low middle high Connecting indoor/ red blue outdoor units communication CON9 ROOM OUTID2 WATER CON6...
  • Page 36 Design & installation Guide For McQuay MDS Multi System Model MCK025/030/040/050T SW-PB LINE KEY1 NEUTRAL blue Connecting indoor/ outdoor units communication ROOM CON9 OUTID2 WATER CON6 white blue black black blue blue yellow/green Electronic brown expansion valve Transformer orange Swing motor Drainage pump Fan motor...
  • Page 37 Design & installation Guide For McQuay MDS Multi System Model MCM050T SW-PB LINE KEY1 NEUTRAL blue LF MF Connecting indoor/ outdoor units communication ROOM CON9 OUTID2 WATER CON6 blue yellow/green black black Electronic expansion valve black black Transformer Fan motor 1...
  • Page 38 Design & installation Guide For McQuay MDS Multi System 2.6.2 Wiring Diagram of Outdoor Units Model MDS030A 220V~/50Hz PWMV LIVE NEUTRAL NEUTRAL blue TRAN-H OV-COMP3 McQuay Trans- Shaft white former OV-COMP2 heater TRAN-L OV-COMP1 black white Compressor Fan 1 AI-IN...
  • Page 39 Design & installation Guide For McQuay MDS Multi System Model MDS040A 220V~/50Hz PWMV LIVE NEUTRAL NEUTRAL blue blue TRAN-H OV-COMP3 McQuay Trans- former OV-COMP2 TRAN-L OV-COMP1 white Fan 2 Fan 1 Compressor AI-IN Connecting indoor Coil middle unit communication temperature sensor(TH5)
  • Page 40 Design & installation Guide For McQuay MDS Multi System Model MDS050A 220V~/50Hz PWMV LIVE NEUTRAL NEUTRAL blue blue TRAN-H OV-COMP3 McQuay Trans- former OV-COMP2 TRAN-L OV-COMP1 white Fan 2 Compressor Fan 1 AI-IN Connecting indoor Coil middle unit communication temperature sensor(TH5)
  • Page 41 Design & installation Guide For McQuay MDS Multi System Model MDS050AR(380V/3N~/50Hz) DB3A PWMV DB3A LIVE NEUTRAL NEUTRAL TRAN-H OV-COMP3 McQuay Trans- former OV-COMP2 TRAN-L OV-COMP1 Shaft heater Digital Fan 1 Fan 2 compressor AI-IN Description of components and parts: Coil outlet...
  • Page 42 Design & installation Guide For McQuay MDS Multi System Model MDS060AR(220V~/50Hz) PWMV LIVE 6T3 22 NEUTRAL NEUTRAL TRAN-H OV-COMP3 McQuay Trans- Shaft former white white OV-COMP2 heater TRAN-L OV-COMP1 white black black Compressor Fan 1 Fan 2 AI-IN Coil outlet...
  • Page 43 Design & installation Guide For McQuay MDS Multi System Model MDS080/100/120B 380V/3N~/50Hz DB3A LOW-I HI-1 TH12 TH11 TH10 TH9 LOW-U HI-U BLACK MDS-M WHITE Connecting the indoor unit FIX3-OL FIX2-OL Connecting central control system FIX1-OL MDS-P 21 22 24 25 26...
  • Page 44 Design & installation Guide For McQuay MDS Multi System Model MDS150B 380V/3N~/50Hz DB3A LOW-I HI-1 TH12 TH11 TH10TH9 LOW-U HI-U BLACK MDS-M WHITE FIX3-OL Connecting the indoor unit FIX2-OL MDS-P Connecting central control system FIX1-OL 21 22 24 25 26...
  • Page 45 Design & installation Guide For McQuay MDS Multi System Model MDS180B 380V/3N~/50Hz DB3A LOW-I HI-1 TH11 LOW-U HI-U TH12 TH10 BLACK WHITE MDS-E MDS-M FIX3-OL FIX2-OL Connecting the indoor unit FIX1-OL DIG-OL Connecting central control system MDS-P OL6 18 32 33...
  • Page 46 Design & installation Guide For McQuay MDS Multi System Model MDS200/220/240B 380V/3N~/50Hz DB3A LOW-I HI-1 TH11 LOW-U HI-U TH12 TH10 BLACK WHITE MDS-E MDS-M OL3 11 FIX3-OL Connecting the indoor unit FIX2-OL Connecting central control system FIX1-OL DIG-OL 32 33...
  • Page 47 Design & installation Guide For McQuay MDS Multi System Model MDS260BR(Master Unit) DB3A HI-1 TH12 TH11 TH10 TH9 LOW-I LOW-U HI-U BLACK MDS-M WHITE Connecting the indoor unit FIX3-OL FIX2-OL Connecting central control system FIX1-OL MDS-P 21 22 24 25 26...
  • Page 48 Design & installation Guide For McQuay MDS Multi System Model MDS260/280/300BR(Slave Unit) 380V/3N~/50Hz DB3A LOW-I HI-1 TH12 TH11 TH10TH9 LOW-U HI-U BLACK MDS-M WHITE Connecting the indoor unit FIX3-OL FIX2-OL Connecting the master unit MDS-P FIX1-OL 21 22 24 25 26...

  • Page 49: Electric Connection

    Design & installation Guide For McQuay MDS Multi System 2.7 Electric Connection 2.7.1 MDS030A/AR MDS040A/AR MDS050A/AR Indoor unit 1 Indoor unit 2 Outdoor Indoor Unit electric control box Unit electric control box Main board Main board Main power Main power...
  • Page 50 Design & installation Guide For McQuay MDS Multi System 2.7.3 MDS080 240B/BR Outdoor Indoor 380V/3N~/50Hz Indoor unit 1 Indoor unit 2 Unit electric control box L1 L2 L3 N Main board Main board Shielded wire Communic- Communic- ation port ation port...

  • Page 51: Electric Data

    Design & installation Guide For McQuay MDS Multi System 2.8 Electric Data 2.8.1 Outdoor Unit MDS MDS030A/ MDS040A/ MDS050A/ MDS060A/ MDS050A/ MDS060A/ Model MDS030AR MDS040AR MDS050AR MDS060AR MDS050AR MDS060AR Power supply 220V /50Hz 380V /3N /50Hz Cross section area(mm 6(2.5) 4(2.5)

  • Page 52: Selection

    Selection 3.1 Load Calculation 3.1.1 Planning and Cooperation McQuay recommends you to estimate and plan the following before engineering. Based on the air conditioning area function, calculate cooling/heating load (depending on the temperature,humidity, and ventilation). Query related meteorologic information, especially the sun light, wind direction in winter and summer, the ambient cooling/heating sources, and other external factors that may affect the running of the units.
  • Page 53 Design & installation Guide For McQuay MDS Multi System If we know the heat performance index q [W/(m )] and outside volume V (m ), we can calculate the heating load as follows: = aq V( t total Where, a is the correction factor. For details, see the table.

  • Page 54: Selection Of Indoor Units

    For ceiling concealed and duct unit, McQuay has several types such as standard unit, auxiliary electric heater, auxiliary hot water heater, etc.

  • Page 55: Selection Of Outdoor Units

    Design & installation Guide For McQuay MDS Multi System 3.3 Selection of Outdoor Units For the allowed combinations, please refer to the "Total Capacity Indexes of a Combination of Indoor Units" table. The standard combination is the one with which the total indoor unit capacity is most proximate to but less than 100% of the capacity of the outdoor unit combination.
  • Page 56 Design & installation Guide For McQuay MDS Multi System 3.3.7 Actual Capacity Calculation Based on the model and combination rate of the outdoor unit, select an appropriate door unit capacity table. Then find out the capacity of the outdoor unit (kW) and that of each indoor unit (kW) according to the related temperatures of the indoor and outdoor units.
  • Page 57 Design & installation Guide For McQuay MDS Multi System 3.3.10 Temperature-related Cooling Capacity Correction Factors 3.3.11 Temperature-related Heating Capacity Correction Factors -57-...

  • Page 58: Design Of Air System

    Design & installation Guide For McQuay MDS Multi System 3.4 Design of Air System The air cooled pipeline unit is an important and complex part of the air system. The air system must be designed in compliance with Design Code for Heating, Ventilation and Air Conditioning and Code of Design on Building Fire Protection.
  • Page 59 Design & installation Guide For McQuay MDS Multi System The conflux of the return air inlet brings little affect on the air flow pattern in the room. So, its structure is simple. Some only have a metal mesh in the orifice, or a shutter or grille.
  • Page 60 Design & installation Guide For McQuay MDS Multi System Select the loop with most resistance and that with minimum resistance, and then calculate the frictional resistance and local resistance loss of each pipe segment. Check the unbalance ratio of the loop of most resistance to that of minimum resistance must be less than 15%.
  • Page 61 Design & installation Guide For McQuay MDS Multi System Wall thickness of the air pipe The wall thickness directly relates to the effect and life of the pipe.Too thin wall will cause unstable installation, and thus the pipe will heavily with noise increased. Even worse, the friction might compound the problem, shortening the service life of the air pipe or even the entire air conditioning system.
  • Page 62 Design & installation Guide For McQuay MDS Multi System Acceptable (CO ) density Acceptable CO density Room type g/kg Place where people stay for a long time Place where children and patients stay Place where people stay 1.25 1.75 regularly (government agency)

  • Page 63: Selection Of Refnet Joint

    Design & installation Guide For McQuay MDS Multi System 3.5 Slection of Refnet Joint 3.5.1 Copper Pipe Selection ( MDS100BR ) Diameter of the main pipe and that of the remotest pipe(equivalent length<90m) Main pipe: 12.7/ 28.6(the same as the outdoor unit...
  • Page 64 Design & installation Guide For McQuay MDS Multi System The following tables show the refrigerant copper pipe dimension specifications. For MDS-A series Outdoor unit capacit 3.0HP 4.0HP/5.0HP 6.0HP Specification Between the outdoor unit and the first tap joint Liquid pipe 9.52mmxt0.8...
  • Page 65 Design & installation Guide For McQuay MDS Multi System Refnet joint type selection Y type Unit: mm Length (mm) Diameter (mm) Diameter (mm) Diameter (mm) Refnet E(outer I(outer N(outer joint type diameter) diameter) diameter) MDS-Y1 553 172 293 120 28.6 28.9 25.7 22.5...

  • Page 66: Selection Of E-Exv Box

    Design & installation Guide For McQuay MDS Multi System Type : MDS-C1 Unit: mm Type MDS-C2 MDS-C3 12.9 16.1 Four places of silver & copper brazed 19.3 Refnet joint type (mm) Refnet joint type A(outer diameter) MDS-C2 28.6 28.9 25.7 22.5...

  • Page 67: Installation

    Design & installation Guide For McQuay MDS Multi System C H A P T E R Installation 4.1 Outdoor Unit Installation To choose location of installation To ensure good cooling and heating performance of the units, follow up the below to pick up right place to install units: To avoid discharged air returns to the air inlet, to avoid hot air discharged by other units;...
  • Page 68 Design & installation Guide For McQuay MDS Multi System BACK BACK BACK BACK FRONT FRONT FRONT FRONT FRONT FRONT FRONT FRONT BACK BACK BACK BACK 600mm Handling outdoor units Please refer to the followings to move units; To use 4 supporting points to move units instead of 3 points, to avoid unstable move and units drop off.
  • Page 69 Design & installation Guide For McQuay MDS Multi System Installation of the Combined Outdoor Units (Suitable for Model of MDS260/280/300) Two outdoor units can be grouped as one outdoor unit, to connect with indoor units. The installation of combined units is more complicated than that of the single outdoor unit; please read the below notes carefully before installation, and strictly follow the installation instructions.

  • Page 70: Indoor Unit Installation

    Design & installation Guide For McQuay MDS Multi System Balance pipe connection Balance pipe must be installed. Balance pipe shall be connected through the hole of side panel or base panel or the position with the other outdoor unit. Balance pipe shall be installed horizontally and orderly, and shall be lower than the access valve for balance pipe.
  • Page 71 Design & installation Guide For McQuay MDS Multi System 4.2 Indoor Unit Installation To choose the position of installation Improper installation position will affect the cooling and heating performance, or even cause malfunction or accident. Follow the below instructions: Ensure air flow everywhere of room.
  • Page 72 Design & installation Guide For McQuay MDS Multi System Duct Working Installation Air supply duct working installation Two types of air supply duct working: round and rectangle. Round air duct working can be connected up to the air supply inlet directly; while the rectangle one needs to be connected with a transition air duct to air supply inlet, and separate to the air diffuser.
  • Page 73 Design & installation Guide For McQuay MDS Multi System h. To adjust distance between the bottom panel and ceiling to 35.0mm. i. To check whether the installation is horizontal, and indoor units are fixed tightly without dropping off and vibration.
  • Page 74 Design & installation Guide For McQuay MDS Multi System There are also the hole for fresh air and exhaust air for connection with outside in indoor unit, but as for air piping, and only be the other side of refrigerant piping connector. If the indoor unit is installed to the place with a barrier (such as a head lamp) or a small space, the connecting pipe can improve air supply to two rooms at one time.
  • Page 75 Design & installation Guide For McQuay MDS Multi System Installation of MDB-T series indoor unit To mount the MDS050~060T in ceiling. As the air outlet flange is close to the unit bottom, when the unit is mounted in ceiling, the pipe can be laid out easier, effectively reducing the requirement for room height.
  • Page 76 Design & installation Guide For McQuay MDS Multi System Installation of MCM-T Series Indoor Unit To Check the Accessories are Ready To install the indoor unit There are two types of installation. Make sure the hook can bear the unit weight in ceiling mounting;...
  • Page 77 Design & installation Guide For McQuay MDS Multi System 2. To fix the suspending panel with screw bolt as shown as above right figure. 3. To hang the unit to the suspending panel and fix screw bolts, after installation of refrigerant pipe...

  • Page 78: Refrigerant Piping Design And Installation

    Design & installation Guide For McQuay MDS Multi System 4.3 Refrigerant Piping Design and Installation 4.3.1 Refrigerant Piping Design ( Including Selection of Refnet Joint ) Capacity combination The indoor units & outdoor units should have a relationship as follows:...
  • Page 79 Design & installation Guide For McQuay MDS Multi System Equivalent length Equivalent length = actual pipe length + number of elbows X equivalent length of each elbow + number of oil traps X equivalent length of each oil trap. Item...
  • Page 80 Design & installation Guide For McQuay MDS Multi System Connection of refnet joint and distributor kit Outdoor unit Refnet joint Indoor unit controller Only connected by the refnet joint Outdoor unit Distributor kit Indoor unit controller Only connected by the distributor kit...
  • Page 81 Design & installation Guide For McQuay MDS Multi System Refrigerant Piping Installation: Refrigerant piping should use the appointed diameter pipe; Refnet joint must be installed horizontally or vertically. (Horizontal line) A viewer (Horizontal line) B viewer Distributor kit must be installed horizontally.
  • Page 82 Design & installation Guide For McQuay MDS Multi System The EXV must be installed vertically The throttle is installed vertically To indoor unit To outdoor unit 4.3.2 Refrigerant Piping Assembly Process install the indoor unit cut the piping required install the pipe...
  • Page 83 Design & installation Guide For McQuay MDS Multi System leakage Moisture Dust 4.3.3 Exchange Way of Nitrogen Gas (When Welding Copper Tube) Suppose no nitrogen gas is injected into refrigerant pipe when welding, the oxide air bubble will come into being in the internal surface of tube. This will result in some damage to the system. In order to avoid these, nitrogen gas should be injected into refrigerant pipe when welding, this process is called nitrogen gas exchange method.
  • Page 84 Design & installation Guide For McQuay MDS Multi System 4.3.4 Transportation and Conservation of Copper Tube When transport the connecting pipe, please be careful to keep it in shape. Copper cap should be used to prevent the dirt and water from entering it. When store it, the side of the connecting...
  • Page 85 Design & installation Guide For McQuay MDS Multi System Steps: Put the pressure adjustor on the nitrogen bottle Connect the pressure adjustor with the liquid pipe of the outdoor unit Seal any other connecting port, Open the valve of the nitrogen and adjust it which the pressure is 5kg/cm Check to see if the nitrogen go through the liquid pipe of point A.

  • Page 86: Work Flow

    Design & installation Guide For McQuay MDS Multi System 4.3.7 Process Sequence of Air Leakage Test Pressure refrigerant piping is the pressure Pass charging released? assembly finished check and maintain it Main points of testing Please test as follows: The Pressure charging must be tested both in liquid pipe and gas pipe.
  • Page 87 Design & installation Guide For McQuay MDS Multi System 4.3.8 Air Leak Gap Checking Test 1 (when the pressure reduces) Hearing use your ear to find it out. Touching use your hand to find it out. Soap water use soap water to find it out.
  • Page 88 Design & installation Guide For McQuay MDS Multi System Only the gas pip e is heat- The gas and liquid pipe are heat- Moisture preservation support insulated insulated Gas pipe Heat Heat Liquid pipe preservation preservation Gas pipe Liquid pipe...
  • Page 89 Design & installation Guide For McQuay MDS Multi System A Valve handle (Before pipe connection, vacuum pumping and additional refriger- ant filling for delivery, make sure this valve is closed completely. After the above operations, please fully open it.) B Stop pin (prevent the valve handle from turning over 90 degrees)
  • Page 90 Design & installation Guide For McQuay MDS Multi System 4.3.11 Refrigerant charging Calculate the refrigerant amount accord- Add additional refrigerant ing to the length of the liquid pipe The refrigerant amount of fill of the outdoor unit before delivery (excluding the refrigerant to...
  • Page 91 Design & installation Guide For McQuay MDS Multi System Selection of vacuum pump When selecting a vacuum pump, please pay attention to the follows: The range of vacuum must be up to -755 mmHg The vacuum pump should have a large exhaust volume(more than 40 litres/min).
  • Page 92 Design & installation Guide For McQuay MDS Multi System Ordinary vacuum drying kg/cm -200 -400 -600 -700 -755mmHg -760 Vacuum drying Vacuum pump Refrigerant charging Total for 3 hours Special vacuum drying This vacuum drying way is used when there are some moisture in the copper pipe.

  • Page 93: Design, Processing And Installation Of Condensated Drain Pipe

    Design & installation Guide For McQuay MDS Multi System 4.4 Design, Processing and Installation of Condensated Drain Pipe 4.4.1 Design of Condensated Piping Size selection of main pipe and vertical pipe of condensated water Choose the pipe size according to the condensated water flow from the main pipe of indoor unit and the following table;...
  • Page 94 Design & installation Guide For McQuay MDS Multi System 4.4.2 Making and Mounting Condensate Pipes Procedure: insulate the Install the connect the con- check for pipe from heat indoor units densate pipe water leakage 4.4.3 Slope and Supporter of Condensate Pipe...
  • Page 95 Design & installation Guide For McQuay MDS Multi System 4.4.5 The Main Drainage Pipe of Multiple Indoor Units The pipe should be mounted from the upstream, and the diameter of the downstream connecting pipe should be as long as possible.
  • Page 96 Design & installation Guide For McQuay MDS Multi System 4.4.8 Installation of the Drainage Lift Pipe Use the gradienter to check if the indoor unit If the drainage pipe needs to be lifted up, it is parallel to the ceiling, should be less than 300mm.

  • Page 97: Testing

    Design & installation Guide For McQuay MDS Multi System C H A P T E R Testing 5.1 Hardware Diagram and Configuration 5.1.1 MDS Series Indoor Units 3-speed fan Power supply Electronic expansion valve Temperature measurement indicator Communication port 1...
  • Page 98 Design & installation Guide For McQuay MDS Multi System Address settings (SW2.1 ___ SW2.6) Unit address SW2.1 SW2.2 SW2.3 SW2.4 SW2.5 SW2.6 -98-...
  • Page 99 Design & installation Guide For McQuay MDS Multi System Model 2 setting SW3.5 SW3.8 Model 2 SW3.5 SW3.6 SW3.7 SW3.8 MDBX Reserve Power setting SW3.1 SW3.4 Power SW3.1 SW3.2 SW3.3 SW3.4 0.8HP 1.0HP 1.5HP 1.8HP 2.0HP 2.5HP 3.0HP 4.0HP 5.0HP 6.0HP...
  • Page 100 Design & installation Guide For McQuay MDS Multi System Description of controller hardware Input port: The system contains 5 test ports designed for high/low pressure test, digital compressor overload, constant speed compressor overload 1 and constant speed compressor overload 2...
  • Page 101 Design & installation Guide For McQuay MDS Multi System DIP switch setting J1 settings (1:ON: 0:OFF) Initial opening extent Initial opening extent J1.1 J1.2 J1.1 J1.2 of the expansion valve of the expansion valve J1.3 reserved J1.4: J1.5: J1.6: J1.7 capacity settings J1.4...
  • Page 102 Design & installation Guide For McQuay MDS Multi System 5.1.3 MDS-B Series Outdoor Units Fixing hole socket Reset Power indicator unit communication terminals controlled communication terminals unication indicator trol system DIP switch setting Note: 1: 1: ON, 0: OFF S1 (1~2)
  • Page 103 Design & installation Guide For McQuay MDS Multi System S1 3~8 indicate the number of connected indoor units S2 (1) S2 (2 3) Slave module Initial opening Master module extent of the valve S2 (4~8) addresses of the outdoor unit Address No.

  • Page 104: Trial Run

    Design & installation Guide For McQuay MDS Multi System S3 (1~4) capacity of the outdoor unit:MDS-A Address No. S3 (1~4) capacity of the outdoor unit:MDS-B Address No. 10HP 12HP 15HP 18HP 20HP 22HP 26HP 28HP 32HP 5.2 Trial Run Precautions Power up the system 12 hours while you run it for the first time so that the shaft can be preheated in advance;...

  • Page 105: User Guide

    Design & installation Guide For McQuay MDS Multi System C H A P T E R Servicing and Maintenance 6.1 User Guide 6.1.1 Responsibilities and Obligations This product is covered under MacQuay warranty during the warranty period. Only MacQuay technicians or experienced professionals designated by MacQuay are allowed to install, test, repair and maintain this product series.

  • Page 106: Servicing And Maintenance

    Design & installation Guide For McQuay MDS Multi System 6.2 Servicing and Maintenance Caution: Do not use or place inflammable and explosive articles beside the air-conditioning unit; Power the indoor units in a centralized way; Please check the parts like installing support often to see if they are damaged after longtime service;...
  • Page 107 Design & installation Guide For McQuay MDS Multi System Fan motor This component requires only a little care. As the motor is lubricated and sealed before the equipment leaves factory, no more lubrication is needed. After the unit remains in service for six months, be sure to check the fan motor is entirely insulated from the ground.
  • Page 108 Design & installation Guide For McQuay MDS Multi System Part Procedure Recommended interval 1. Open the air input grid and take out the air filter and air refresher; 2. Disassemble the air filter and the air refresher; 3. Clear the dust away from the air filter using a cleaner or water below 40 containing neutral detergent.
  • Page 109 Design & installation Guide For McQuay MDS Multi System compressed air source is available, please use it to blow away the dust from the surface of the heat exchanger. If the unit is operating in an oily, salty, wet or dirty environment, do clean it with special-purpose detergent.

  • Page 110: Fault Code And Troubleshooting

    Design & installation Guide For McQuay MDS Multi System C H A P T E R Fault Codes and Troubleshooting Fault codes here refer to the codes that appear on the remote control. If a host computer is available, the fault cause is directly displayed.
  • Page 111 Design & installation Guide For McQuay MDS Multi System 7.2 Indoor Unit Malfunction Code Sensor broken (indoor inlet coil) Sensor broken (indoor mid coil) Sensor broken (indoor outlet coil) Sensor broken (indoor return air ) Sensor broken (indoor supply air)

  • Page 112: Annexes

    Design & installation Guide For McQuay MDS Multi System C H A P T E R Annexes Annex 1(1) Parameters designed for various kinds of buildings Cooling load (w/m Occupants Lighting Air flow Max. noise Building Sensible Total /person dB(A)
  • Page 113 Design & installation Guide For McQuay MDS Multi System Annex 1 (2) Heat load indexes designed for air-conditioning in some of the Chinese buildings Building type Heat load index Building type Heat load index and room name and room name...
  • Page 114 Design & installation Guide For McQuay MDS Multi System Annex 6 Confirmation Form 1. Use the Confirmation table to add more secondary refrigerant Calculate the additional amount of secondary refrigerant required according to the diameter and length of the copper pipes.
  • Page 115 Design & installation Guide For McQuay MDS Multi System -115-...
  • Page 116 WWW.MCQUAY.COM EN0601-500-A Printed in China...

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