Multi-Split Systems - McQuay

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Diagram 1Additional Charge (For Flare Connection)The refrigerant gas is charged in the outdoor unit and, if the piping length to every indoor is 7.62m, additionalcharge of the refrigerant after vacuuming is not necessary.When the piping length to every indoor is more than 7.62m, please add 15g of refrigerant for every addition of1m pipe length.Diagram 3 shows typical charging method.Diagram 2Diagram 328
Special Precautions When Dealing With Refrigerant R407C Unit1) What is new refrigerant R407C?R407C is a zeotropic refrigerant mixture which has Zero Ozone Depletion Potential (ODP = 0) and thusconformed to the Montreal Protocol regulation. It requires Polyol-ester oil (POE) oil for its compressor’slubricant. Its refrigerant capacity and performance are about the same as the refrigerant R22.2) ComponentsMixture weight composition R32(23%), R125(25%), R134a(52%)3) Characteristic• R407C liquid and vapor components have different compositions when the fluid evaporates or condenses.Hence, when leak occurs and only vapor leaks out, the composition of the refrigerant mixture left in thesystem will change and subsequently affect the system performance. DO NOT add new refrigerant toleaked system. It is recommended that the system should be evacuated thoroughly before recharging withR407C.• When refrigerant R407C is used, the composition will differ depending on whether it is in gaseous or liquidphase. Hence when charging R407C, ensure that only liquid is being withdrawn from the cylinder or can.This is to make certain that only original composition of R407C is being charged into the system.• POE oil is used as lubricant for R407C compressor, which is different from the mineral oil used for R22compressor. Extra precaution must be taken not to expose the R407C system too long to moist air.4) Check list before installation/servicing• TubingRefrigerant R407C is more easily affected by dust of moisture compared with R22, make sure to temporarilycover the ends of the tubing prior to installation• Compressor oilNo additional charge of compressor oil is permitted.• RefrigerantNo other refrigerant other that R407C• ToolsTools specifically for R407C only (must not be used for R22 or other refrigerant)i) Gauge manifold and charging hoseii) Gas leak detectoriii) Refrigerant cylinder/charging cylinderiv) Vacuum pump c/w adapterv) Flare toolsvi) Refrigerant recovery machine5) Handling and installation guidelinesLike R22 system, the handling and installation of R407C system are closely similar. All precautionary measures;such as ensuring no moisture, no dirt or chips in the system, clean brazing using nitrogen, and thorough leakcheck and vacuuming are equally important requirements. However, due to zeotropic nature of R407C and itshydroscopic POE oil, additional precautions must be taken to ensure optimum and trouble free system operation.a) Filter dryer must be installed along the liquid line for all R407C air conditioners. This is to minimise thecontamination of moisture and dirt in the refrigerant system. Filter dryer must be of molecular sieve type.For a heat pump system, install a two--way flow filter dryer along the liquid line.b) During installation or servicing, avoid prolong exposure of the internal part of the refrigerant system tomoist air. Residual POE oil in the piping and components can absorb moisture from the air.29
Page 1: CatalogMMS - 2008Multi-Split System
Page 8: OUTDOORINDOORCooling : MWM 010/015G
Page 14 and 15: MODEL :MMSH8K8A12
Page 16 and 17: MODEL :MMSH66K66A14
Page 18 and 19: MODEL :MMSD/M4MSD 1010 / 1015 / 151
Page 20 and 21: ControllersG7 Remote Controller146T
Page 22 and 23: SLM Operating InstructionsSLM1. “
Page 24 and 25: Operating State and Fault TableWire
Page 26 and 27: Installation In Zone Exposed To Str
Page 28 and 29: 2) MMST / M4MST3) MMSH26
Page 32 and 33: c) Ensure that the compressor is no
Page 34 and 35: d) When charging R410A, ensure that
Page 36 and 37: Engineering and Physical DatataMMSD
Page 38 and 39: General Data - Cooling Only (R22)1)
Page 40 and 41: General Data - Cooling Only (R22)1)
Page 42 and 43: General Data - Cooling Only (R22)MO
Page 52 and 53: General Data - Heatpump (R22)1) ALL
Page 54 and 55: General Data - Cooling Only (R407C)
Page 56 and 57: General Data - Heatpump (R407C)1) A
Page 58 and 59: Components Data - Cooling Only (R22
Page 74 and 75: Components Data - Heatpump (R22)1)
Page 78 and 79: Components Data - Heatpump (R407C)1
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MMSTGeneral Data - Cooling Only (R2
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General Data - Cooling Only (R22)1)
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General Data - Cooling Only (R22)MO
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General Data - Cooling Only (R22)OU
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General Data - Cooling Only (R22)MO
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General Data - Cooling Only (R22)IN
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General Data - Cooling Only (R22)IN
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General Data - Cooling Only (R22)OU
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General Data - Heatpump (R22)1) ALL
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General Data - Heatpump (R22)1) ALL
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General Data - Cooling Only (R407C)
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General Data - Heatpump (R407C)1) A
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General Data - Heatpump (R407C)1) A
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Components Data - Cooling Only (R22
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Components Data - Heatpump (R22)1)
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Components Data - Heatpump (R22)1)
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Components Data - Heatpump (R407C)1
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Components Data - Heatpump (R407C)1
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Capacity Data - Heatpump (R22)Cooli
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Capacity Data - Heatpump (R407C)OUT
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Capacity Data - Cooling Only (R22)O
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Capacity Data - Cooling Only (R22)O
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MODEL :MMSD 2020ANote : Dimension i
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MODEL :MMSH 8K66 ANote : Dimension
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INDOOR UNITMODEL : MWM 010/015 G/GR
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INDOOR UNITMODEL : MCK 025 AMCK 010
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Electrical Data - Cooling Only (R22
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Electrical Data - Heatpump (R22)1)
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MMSTElectrical Data - Cooling Only
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Electrical Data - Heatpump (R22)1)
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Electrical Data - Heatpump (R407C)1
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OUTDOOR UNIT - COOLING ONLYMODEL :
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OUTDOOR UNIT - COOLING ONLYMODEL :
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OUTDOOR UNIT - HEATPUMPMODEL : MMSD
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INDOOR UNIT - COOLING ONLYMODEL : M
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INDOOR UNIT - HEATPUMPMODEL : MWM 0
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INDOOR UNITMODEL : MCK 010CMODEL :M
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INDOOR UNITMODEL : MCC 010CMODEL :M
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Servicing and MaintenanceThe design
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MODEL : MMST 101025 / 101520 / 1015
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Generally, there are two kinds of c
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MODEL : MMSD 1020A / 1520A219
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MODEL : MMSD 1520ARNo Description P
Page 225 and 226:
MODEL :MMST 101010 / 101015 / 10151
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MODEL : MMST 101025 / 101525 / 1515
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MODEL : MMSH 8K66A / 66K66A / 66K55
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Products manufactured in an ISO cer
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Multi-Split Systems - McQuay

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