McQuay MDS030A Design & Installation Manual
Mds multi system
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- Applications manual (116 pages) ,
- Service manual (166 pages) ,
- Manual (44 pages)
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Summary of Contents for McQuay MDS030A
- Page 1 Engineered for flexibility and performance. Design & Installation Guide For McQuay MDS Multi System...
- Page 2 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.
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Page 3: Table Of Contents
CONTENTS Foreword 1. Overview 1.1 General Information°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.2 Working Principle & System Principle°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.3 Main Features°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.4 Nomenclature°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.5 Products Series°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.6 Performance Parameter°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.7 Operating Range°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.8 Refnet°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.9 Outline of Indoor Units°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 1.10 Outline of Outdoor Units°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠ 2. Unit Control 2.1 Introduction of the Controller°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠°≠... -
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 PWM valve power off °ˆ PWM valve power on °ˆ °ˆ Valve close °ˆ Valve open °ˆ Fixed scroll move downwards °ˆ Fixed scroll moves upwards °ˆ Two scrolls gather together °ˆ...
- Page 6 Design & installation Guide For McQuay MDS Multi System 1.2.3 System principle MDS030A°¢MDS040A°¢MDS050A°¢MDS060A Note: MDS030A unit excludes the reservoir. MDS030AR°¢MDS040AR°¢MDS050AR°¢MDS060AR Note: MDS030AR unit excludes the reservoir.
- Page 7 Design & installation Guide For McQuay MDS Multi System MDS080R°¢ MDS100BR°¢ MDS120BR MDS150BR...
- Page 8 Design & installation Guide For McQuay MDS Multi System MDS180BR MDS200BR°¢MDS220BR°¢MDS240BR...
- Page 9 Design & installation Guide For McQuay MDS Multi System MDS260BR MDS280BR°¢MDS300BR...
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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 °ˆ Wide capacity modulation range£® 10%-100%) £ª °ˆ According to changing the ratio of °∞loading time°±and °∞unloading time, MDS can modulate the capacity steplessly£ª... - Page 11 Design & installation Guide For McQuay MDS Multi System 1.3.4 Energy saving °ˆ The inverter system ’s capacity modulation range is from 30% to 100%, while MDS system ’s capacity modulation range is from 10% to 100%; °ˆ Quick response to the capacity modulation;...
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Page 12: Nomenclature
Design & installation Guide For McQuay MDS Multi System 1.3.7 Space saving °ˆ Compared to large size central air conditioning, MDS system is high 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 °ˆ Indoor unit: Ceiling exposed/floor standing unit M CM 050 T - A M A Design serial No. Matching outdoor units: MDS series Power supply features: A:220V°´ /50Hz Design serial No Cooling capacity No.
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Page 14: Products Series
Design & installation Guide For McQuay MDS Multi System Air-cooled cooling duct indoor unit °ˆ M DB 050 T - A M A Design serial 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 °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò °Ò... - Page 16 Design & installation Guide For McQuay MDS Multi System 1.6.3 Ceiling cassette Model Indoor unit MCK010T MCK015T MCK018T MCK020T MCK025T MCK030T MCK040T MCK050T 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 1.6.5 Specification 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 1058x430x1044 1058x4230x1247...
- Page 18 Design & installation Guide For McQuay MDS Multi System 1.6.6 Specification Model MDS080B MDS080BR MDS100B MDS100BR MDS120B MDS120BR MDS150B MDS150BR MDS180B MDS180BR MDS200B MDS200BR Nominal cooling 24.5 24.5 28.0 28.0 32.5 32.5 40.0 40.0 47.5 47.5 50.0 50.0 capacity Nominal heating 26.0...
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Page 19: Operating Range
Design & installation Guide For McQuay MDS Multi System 1.7 Operating Range °æ Note°øThe t able 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 Distributor kit Type: MDS-C1 unit: mm -20-...
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Page 21: Outline Of Indoor Units
Design & installation Guide For McQuay MDS Multi System unit: mm 1.9 Outline of Indoor Units 1.9.1 MCK010°´ 050T unit: mm Model MCK010°´ 020T MCK025°´ 050T -21-... - Page 22 Design & installation Guide For McQuay MDS Multi System 1.9.2 MDB050T unit: mm 1.9.3 MDB060T 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 MCC030T 1314 1005 MCC040T 1300 1331 1664 1355 MCC050T...
- Page 24 Design & installation Guide For McQuay MDS Multi System 1.9.6 Auxiliary heating coil unit: mm Model HWT08-15 HWT18-30 1022 1078 HWT40-50 1372 1314 1342 1438 HWT60 1632 1574 1602 1688 1.9.7 Auxiliary electric heating box unit: mm Model HDP1.2T08-15/HDP2.4T08-15 HDP2.4T18-30/HDP3.6T18-30...
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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) unit: mm 1.10.2 MDS040A(R)°¢MDS050A(R) unit: mm -25-... - Page 26 Design & installation Guide For McQuay MDS Multi System 1.10.3 MDS060A(R) unit: mm 1.10.4 MDS080B(R)°¢MDS100B(R)°¢MDS120B(R) unit: mm -26-...
- Page 27 Design & installation Guide For McQuay MDS Multi System 1.10.5 MDS150B(R) unit: mm 1.10.6 MDS180B(R)°¢MDS200B(R)°¢MDS220B(R)°¢MDS240B(R) unit: mm -27-...
- Page 28 Design & installation Guide For McQuay MDS Multi System 1.10.7 MDS260B(R) unit: mm 1.10.8 MDS280B(R)°¢MDS300B(R) unit: mm -28-...
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Page 29: Introduction Of The Controller
Design & installation Guide For McQuay MDS Multi System C H A P T E R Units Control 2.1 Introduction of 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 512 units (32groups). -
Page 30: Operation Of The Controller
Design & installation Guide For McQuay MDS Multi System 2.3 Operation of the Controller 2.3.1 Main features Both wire 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 31 Design & installation Guide For McQuay MDS Multi System Temp unit setting °Ò There is a switch on the PCB board. When switch OP1 is ON, the unit is °Ê; when it is OFF, the unit is 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 32 Design & installation Guide For McQuay MDS Multi System Timer setting °Ò Press °∞Timer °± to enter timer setting (When the unit is ON, it can only be set to OFF; When the unit is OFF, it can only be set to ON) and last timer will be shown on the LCD.
- Page 33 Design & installation Guide For McQuay MDS Multi System 2.3.3 Wire control panel For three-speed unit For the cooling and For the cooling and For three speed For single speed with wind wing heat pump unit with heat pump unit with...
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Page 34: Software Management System
2.4.1 Real-time monitor software Design & installation Guide For McQuay MDS Multi System 2.4 Software Management System 2.4.1 Real-time monitor software °ˆ System monitor software: The real time monitor software of MDS unit can perform such functions as indoor monitor, system monitor and service monitor, for the purpose of making the user or service test personnel see the detailed parameters and know the operation of the unit. - Page 35 Design & installation Guide For McQuay MDS Multi System °ˆ Loop monitor* °ˆ Service monitor* Select and see the outdoor unit system Display the current operation parameters figure, operation parameters and operation and history record curve of indoor outdoor parameters of all indoor unit inthe system.
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Page 36: Network Central Control
MDS system is equipped with strong alarm display and inquiry function to save the time and cost of maintenance. °ˆ 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 37: Wiring Diagram
Design & installation Guide For McQuay MDS Multi System 2.6 Wiring Diagram 2.6.1 Wiring diagram of the indoor unit °ˆ Model MCC008/010/015/018/020/025/030/040/050/060T °ˆ Model MCK010/015/018/020T -37-... - Page 38 Design & installation Guide For McQuay MDS Multi System Model MCK025/030/040/050T °ˆ °ˆ MCM020/030T -38-...
- Page 39 Design & installation Guide For McQuay MDS Multi System Model MCM050T °ˆ °ˆ Model MDB050/060T -39-...
- Page 40 Design & installation Guide For McQuay MDS Multi System 2.6.2 Wiring diagram of outdoor units °ˆ Model MDS030A °ˆ Model MDS030AR -40-...
- Page 41 Design & installation Guide For McQuay MDS Multi System °ˆ Model MDS040A Model MDS040AR °ˆ -41-...
- Page 42 Design & installation Guide For McQuay MDS Multi System Model MDS050A °ˆ °ˆ Model MDS050AR -42-...
- Page 43 Design & installation Guide For McQuay MDS Multi System Model MDS050AR °ˆ °ˆ Model MDS060A -43-...
- Page 44 Design & installation Guide For McQuay MDS Multi System Model MDS060AR °ˆ °ˆ Model MDS060AR -44-...
- Page 45 Design & installation Guide For McQuay MDS Multi System Model MDS080/100/120B °ˆ °ˆ Model MDS080/100/120BR -45-...
- Page 46 Design & installation Guide For McQuay MDS Multi System Model MDS150B °ˆ °ˆ Model MDS150BR -46-...
- Page 47 Design & installation Guide For McQuay MDS Multi System Model MDS180B °ˆ °ˆ Model MDS180BR -47-...
- Page 48 Design & installation Guide For McQuay MDS Multi System Model MDS200/220/240B °ˆ °ˆ MDS200/220/240BR -48-...
- Page 49 Design & installation Guide For McQuay MDS Multi System Model MDS260BR °ˆ °ˆ Model MDS260/280/300BR -49-...
- Page 50 Design & installation Guide For McQuay MDS Multi System Model MDS280/300BR °ˆ -50-...
- Page 51 Design & installation Guide For McQuay MDS Multi System 2.7 Wiring Diagram 2.7.1 MDS030A/AR°¢MDS040A/AR°¢MDS050A/AR 2.7.2 MDS050A/AR°¢MDS060A/AR -51-...
- Page 52 Design & installation Guide For McQuay MDS Multi System 2.7.3 MDS080°´ 240B/BR 2.7.4 MDS260°´ 300B/BR -52-...
- Page 53 Design & installation Guide For McQuay MDS Multi System 2.8 Electrical Date 2.8.1 Outdoor unit£® MDS£© Model MDS030A/MDS030AR MDS040A/MDS040AR MDS050A/MDS050AR MDS060A/MDS060AR Power supply 220V°´ /50Hz Cross section area(mm 6(2.5) Power Q.T.Y 2(1) Model MDS050A/MDS050AR MDS060A/MDS060AR Power supply 380V /3N°´ /50Hz Cross section area(mm 4(2.5)
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Page 54: Selection
Selection 3.1 Load Calculation 3.1.1 Planning and cooperation McQuay recommends you to estimate and plan the following information before engineering. °ˆ Based on the air conditional area function, calculate out the cooling/heating load (depending on the temperature,humidity, and ventilation). °ˆ 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 55 Design & installation Guide For McQuay MDS Multi System If we know the heat performance index q [W/(m . °Ê)] and outside volume V (m ), we can calculate the °ˆ heating load as follows: – t = aq V( t...
- Page 56 3.2.1 The selection of ceiling concealed and duct unit For ceiling concealed and duct unit, McQuay has several types such as standard unit, auxiliary electric heater, auxiliary hot water heater, etc. °ˆ The selection is based on the following factors: °Ò...
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Page 57: Selection Of Outdoor Units
Design & installation Guide For McQuay MDS Multi System 3.3 Selection of Outdoor Units For the combinations allowed, please refer to the "Indoor unit total capacity indexes ” 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 58 Design & installation Guide For McQuay MDS Multi System 3.3.6 Actual capacity calculation °ˆ 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 rated temperatures of the indoor and outdoor units.
- Page 59 Design & installation Guide For McQuay MDS Multi System 3.3.9 Temperature-related cooling capacity correction factors 3.3.10 Temperature-related heating capacity correction factors -59-...
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Page 60: 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 61 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 62 Design & installation Guide For McQuay MDS Multi System Check the air speed according to the actual pipe diameter, and calculate the actual speed, which °Ò should not larger than the recommended value in the design manual. °Ò Select the loop of most resistance and that of minimum resistance, and then calculate the frictional resistance and local resistance loss of each pipe segment.
- Page 63 Design & installation Guide For McQuay MDS Multi System °ˆ Wall thickness of the air pipe The wall thickness directly relates to the effect and life of the pipe. A too thin wall will cause unstable installation, and thus the pipe will sway within a large range to increase the noise. Even worse, the friction might compound the problem, shortening the service life of the air pipe or even the entire air conditioning system.
- Page 64 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 (governmentagency)
- Page 65 Design & installation Guide For McQuay MDS Multi System 3.5 Refnet joint selection 3.5.1 Copper pipe selection ( MDS100BR ) °ˆ 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 66 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 ¶’...
- Page 67 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 68 Design & installation Guide For McQuay MDS Multi System Type : MDS-C1 Unit: mm Type£∫ MDS-C2°¢MDS-C3 Unit: mm -68-...
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Page 69: Installation
Design & installation Guide For McQuay MDS Multi System C H A P T E R Installation 4.1 Indoor unit installation 4.1.1 Ceiling cassette Do not install the indoor unit in a location where it will come into contact with the following elements: uneven circled air, saline gas, sulphide gas, machine oil, moist air and the place which can't support the weight of the unit. - Page 70 Design & installation Guide For McQuay MDS Multi System Make sure the distance between two Suspenders is 620.4mmX790.0mm; °Ò °Ò Use nut, Plat gasket and spring gasket to hang the unit though the suspender; °Ò Adjust the distance between the bottom surface of unit and ceiling to be 35.0mm;...
- Page 71 Design & installation Guide For McQuay MDS Multi System Connecting the hose to the drainage pipe of outdoor unit; °Ò °Ò Pour the water through the water inlet port and check if there is any water leakage; °Ò When the test is finished, connect the other side of the hose to the drainage pipe of the indoor unit.
- Page 72 Design & installation Guide For McQuay MDS Multi System Grille installation °ˆ °Ò Put the air filter into the its frame before install the grille first, °Ò Then put grille to the front panel; °Ò Please note that the white side of the air filter should face its frame;...
- Page 73 Design & installation Guide For McQuay MDS Multi System Some units need an electronic expansion valve box °Ò (throttle box) for condensate pipe installation, as shown in the right figure: Note: The electronic expansion valve box of the indoor unit must be placed in the throttle box and installed in an appropri- ate position of the liquid pipe.
- Page 74 Design & installation Guide For McQuay MDS Multi System 4.1.3 High static pressure duct unit °ˆ In order to keep the unit runs in a good condition, the air inlet port should be at least 3m. °ˆ Soft connecting joint should be used to reduce the sound level and the vibration.
- Page 75 Design & installation Guide For McQuay MDS Multi System °ˆ Make sure supports and hangers are provided to the horizontal and vertical air pipes, and stow- wood is added between the support or hanger of the insulation air pipe and the insulation layer.
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Page 76: Outdoor Unit Installation
Design & installation Guide For McQuay MDS Multi System 4.2 Outdoor unit installation 4.2.1 Lifting to mount the outdoor unit Please lift to mount the unit as shown below. When moving the outdoor unit, you should support it on four points, instead of 3 support points. If only 3 support points, the unit may be unstable, and even fall off. - Page 77 Design & installation Guide For McQuay MDS Multi System MDS030°´ 060A/AR Units °ˆ Min. distance 1500 °ˆ MDS080°´ 300B/BR -77-...
- Page 78 Design & installation Guide For McQuay MDS Multi System 4.2.2 Parallel Unit Installation (For MDS260/280/300) The parallel unit means to connect two outdoor units as an integrated unit to connect the indoor unit. The installation of the parallel unit is more complex than that of a single unit. Please read this manual carefully before installation, and install according to the instructions.
- Page 79 Design & installation Guide For McQuay MDS Multi System °ˆ Connection of the system balance pipe °ÒMake sure the system balance pipe is connected. The system balance pipe should be connected to the unit through the continuous side hole in the chassis or that in the side panel or that in the unit piping position.
- Page 80 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 ) °ˆ Capacity combination The indoor units & outdoor units should have a relationship as follows: °∆...
- Page 81 Design & installation Guide For McQuay MDS Multi System Equivalent length °ˆ °Ò 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.
- Page 82 Design & installation Guide For McQuay MDS Multi System °ˆ Connection of refnet joint and distributor kit Only connected by the refnet joint Only connected by the distributor kit Connected by the refnet joint and the distributor kit -82-...
- Page 83 Design & installation Guide For McQuay MDS Multi System Refrigerant piping installation: °ˆ °Ò Refrigerant piping should use the appointed diameter pipe; °Ò Refnet joint must be installed horizontally or vertically. °Ò Distributor kit must be installed horizontally. °Ò Distributor kit should be connected to indoor unit directly, it is not allowed to connected to the distributor kit or refnet joint.
- Page 84 Design & installation Guide For McQuay MDS Multi System °Ò The Exv must be installed vertically 4.3.2 Refrigerant piping assembly process install the indoor unit cut the piping required install the pipe nitrogen charging Sequence welding blow air leakage test...
- Page 85 Design & installation Guide For McQuay MDS Multi System 4.3.£≥ 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 86 Design & installation Guide For McQuay MDS Multi System 4.3.4 Transportation and conservation of copper tube °ˆ 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 pipe should be sealed as follows: °ˆ...
- Page 87 Design & installation Guide For McQuay MDS Multi System Steps: °ˆ °Ò Put the pressure adjustor on the nitrogen bottle °Ò Connect the pressure adjustor with the liquid pipe of the outdoor unit °Ò Seal any other connecting port, °Ò Open the valve of the nitrogen and adjust it which the pressure value is 5kg/cm2.
- Page 88 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 assembly finished released? check and maintain it °ˆ Main points of testing Please test as follows: °Ò...
- Page 89 Design & installation Guide For McQuay MDS Multi System 4.3.8 Air leak gap checking °ˆ Test 1 (when the pressure reduces) °Ò Hearing °™ use your ear to find it out. °Ò Touching °™ use your hand to find it out.
- Page 90 Design & installation Guide For McQuay MDS Multi System °ˆ Key points The thickness of insulation materials depends on the pipe size. Pipe size Thickness of the insulation material 6.4mm~25.4mm 10mm or more 28.6mm~38.1mm 15mm or more In case the environment is hot and damp, increase the recommended thickness (1 inch for the °Ò...
- Page 91 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 92 Design & installation Guide For McQuay MDS Multi System 4.3.11 Refrigerant filling Calculate the refrigerant amount accord- Add additional refrigerant ing to the length of the liquid pipe °ˆ The refrigerant amount of fill of the outdoor unit before delivery (excluding the refrigerant to be filled in the site pipe) °ˆ...
- Page 93 Design & installation Guide For McQuay MDS Multi System °Ò Selection of vacuum pump When selecting a vacuum pump, please pay attention to the follows: °Ù The range of vacuum pump must be up to -755mmHg °Ù The vacuum pump should have a large air flow (more than 40 litres/min).
- Page 94 Design & installation Guide For McQuay MDS Multi System Type of vacuum pump and the vacuity Application Type Max. air flow vacuum drying air discharge 0.02mmHg vacuum pump with lubricant Suitable Suitable 100L/min 10mmHg unsuitable Suitable 40L/min vacuum pump without lubricant 0.02mmHg...
- Page 95 Design & installation Guide For McQuay MDS Multi System Special vacuum drying °ˆ This vacuum drying way is used when there are some moisture in the copper pipe. Operating sequence: 1. Vacuum drying: pumping the system for 2 hours; 2. Nitrogen charging: Charge the nitrogen to the pressure of 0.5kg/cm As Nitrogen is a dried gas, so it can dry the system;...
- Page 96 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 °ˆ 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 97 Design & installation Guide For McQuay MDS Multi System 4.4.2 Making and mounting accessory condensate pipes Procedure: check for insulate the Install the connect the con- pipe from heat indoor units densate pipe water leakage 4.4.3 Slope and supporter of condensate pipe °ˆ...
- Page 98 Design & installation Guide For McQuay MDS Multi System 4.4.5 The main drainage pipe of multiple indoor units °ˆ The pipe should be mounted from the upstream, and the diameter of the downstream connecting pipe should be as long as possible.
- Page 99 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 If the drainage pipe needs to be lifted up, it unit is parallel to the ceiling, should be less than 300mm.
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Page 100: Testing
Design & installation Guide For McQuay MDS Multi System C H A P T E R Testing 5.1. MDS 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 101 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 -101-...
- Page 102 Design & installation Guide For McQuay MDS Multi System Model 1 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...
- Page 103 Design & installation Guide For McQuay MDS Multi System Description of controller hardware °ˆ 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 (used when 3 compressors are available) °ˆ...
- Page 104 Design & installation Guide For McQuay MDS Multi System J2 settings (1: ON: 0: OFF) D1°´ D5 indicate the local address during intercommunication: J2.1 J2.2 J2.3 J2.4 J2.5 Address J2.1 J2.2 J2.3 J2.4 J2.5 Address J2.6, ON: cooling only OFF: heat pump J2.7, J2.8 reserved...
- Page 105 Design & installation Guide For McQuay MDS Multi System DIP switch setting Note: 1: 1: ON, 0: OFF S1 (1~2) MDS°´ A Cooling only MDS°´ B Heat pump S1 3~8 indicate the number of connected indoor units S2 2°´ 3 S2.1...
- Page 106 Design & installation Guide For McQuay MDS Multi System S2 (4~8) addresses of the outdoor unit Address No. Address No. 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...
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Page 107: Trial Run
Design & installation Guide For McQuay MDS Multi System 5.2 Trial Run °ˆ Precautions °Ò Power up the system 12 hours while you run it for the first time so that the shaft can be preheated in advance; °Ò After the main power supply is switched off, please don ’t start the second trial run until the system is powered for 2.5 hours;... -
Page 108: Servicing And Maintenance
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 ’s warranty during the warranty period. Only MacQuay’s technicians or experienced professionals designated by MacQuay are allowed to install, test, repair and maintain this product series. -
Page 109: Maintenance
Design & installation Guide For McQuay MDS Multi System 6.2 Servicing and Maintenance Caution: °ˆ Do not use or place inflammable and explosive articles beside the air-conditioning unit; °ˆ Power the indoor units in a centralized way; °ˆ Please check the parts like installing support often to see if they are damaged after longtime service;... - Page 110 Design & installation Guide For McQuay MDS Multi System Fan motor °Ò 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 111 Design & installation Guide For McQuay MDS Multi System °ˆ Maintenance and care of indoor unit MCK Although the air-conditioner is designed to have a long service life even with minimal care, be sure to check it at regular intervals throughout its service, so that you can use the air-conditioner better.
- Page 112 Care of the heat exchanger Maintain the heat exchanger once around the end of the running season. If a blade of the heat exchange falls sideways, be sure to put it upright. If any dust or foreign matter is present on the surface of the heat exchanger, use a clean together with a nylon brush to clean it.
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Page 113: Troubleshooting
C H A P T E R Fault Codes and Troubleshooting 7.1 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. 7.1.1 Fault codes for MDS-A/B series No. - Page 114 Indication Light Twinkle Related to Malfunction Code: Type Heat Sensor, outdoor Sensor, indoor System failure Type Heat Pump, indoor Over load, compressor Pressure sensor,outdoor Type Heat Pressure high/low Communication Others °Ò The following phenomena are not unit malfunctions: Some odorous gas blows from the unit, because the unit sucks cigarette smoke and smell from cosmetic, furniture and electric machine.
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Page 115: Annexes
C H A P T E R Annexes Annex 1 Outdoor weather parameters of major Chinese cities Outdoor temperature°Ê Annual average Designed indoor City temperature°Ê temperature Summer Winter Beijing 11.4 30°´ 36 -12°´ -5 22°´ 25 Shanghai 15.7 31°´ 40 -4°´... - Page 116 Annex 2 (1) Parameters designed for various kinds of buildings Cooling load (w/m Occupants Lighting Air flow Max. noise Building Sensible Total /person dB(A) cooling load cooling load Middle 35°´ 50 Far side 35°´ 55 office Individual office 30°´ 45 Meeting room 40°´...
- Page 117 Annex 2 (2) Heat load indexes designed for air-conditioning in some of the Chinese buildings No. Building type Heat load index Building type Heat load index and room name and room name Office building,school 58-80 Store 64-87 Residential building 46-70 85-105 Single-floor residential building...
- Page 118 Annex 9 Confirmation Form 1. Use the Confirmation table to add more secondary refrigerant °ˆ Calculate the additional amount of secondary refrigerant required according to the diameter and length of the copper pipes. °ˆ The table below lists the formula used to calculate the additional amount of secondary refrigerant needed for liquid copper pipes of various diameters (The amount of secondary refrigerant required for the pipes that come with the indoor unit is already available).
- Page 119 4. Table of codes for connected indoor Address Indoor unit model Location of the indoor unit Address Indoor unit model Location of the indoor unit Total capacity of the indoor units (HP): 5. Precautions for globe valve operation °ˆ Please do not open the globe valve after the (extension) accessory pipes are vacuumized on the spot. Otherwise, lubricating oil would flow out of the compressor.
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