2
7.4. UnitDimensions......................................................22
7.5. OutdoorUnitClearances ........................................23
7.5.1. SingleUnits ..............................................23
7.5.2. MultipleUnits ............................................24
8. Refrigeration Pipe Work ..........................25
8.1. Single-ZoneRefrigerantCycleDiagram ................. 25
8.2. Single-ZonePipingLimitations ...............................25
9. Outdoor Unit Connections and Line
Set Usage .................................................26
9.1. PipeLength.............................................................26
9.2. TorqueRequirements .............................................26
10. Power and Communication Wiring for
Systems ...................................................27
11. Outdoor Unit Diagrams ...........................28
12. Installation Requirements ....................... 29
12.1. GasLeakCheckwithSoapWater: ......................... 30
12.2. AirandMoisture......................................................30
12.3. AirPurgingusingaVacuumPump .........................30
12.4. AddingRefrigerantifPipeLengthExceeds
ChargeLessPipeLength .......................................30
12.5. AddRefrigerantafterLong-TermSystem
Operation ................................................................ 30
12.6. ServicingIndoorUnitRefrigerationCircuit..............31
12.6.1. CollectingRefrigerantintoOutdoorUnit...31
12.6.2. AirPurgingwithVacuumPump ................ 31
12.7. EvacuationafterServicingtheOutdoorUnit
RefrigerationCircuit ................................................ 31
12.7.1. EvacuationoftheComplete
RefrigerationCircuit,Indoorand
Outdoor Unit ............................................. 31
12.7.2. RefrigerantCharging ................................ 31
13. Electronic Function .................................32
13.1. Abbreviation ............................................................32
13.2. ElectricControlWorkingEnvironment. ...................32
14. Adding Refrigerant - Single-Zone
Systems ....................................................32
15. Single-Zone Outdoor Unit LED
Locations .................................................. 32
16. SpecicationsandOperations ...............33
16.1. CoolingChart ..........................................................34
16.2. HeatingChart..........................................................34
16.3. CapacityRequestCalculations ...............................35
16.4. OutdoorFanControl ............................................... 36
16.4.1. CoolingMode ...........................................36
17. Indoor and Outdoor Unit Disassembly ..37
17.1. IndoorUnit(AllModels) ..........................................37
17.1.1. FrontPanel ...............................................37
17.1.2. ElectricalParts .........................................39
17.1.3. Evaporator ................................................41
17.1.4. FanMotorandFan ...................................42
17.1.5. Step Motor ................................................42
17.1.6. DrainHose ...............................................43
17.2. Outdoor Unit ...........................................................43
17.2.1. PanelPlate(SomeModels)......................43
17.2.2. PanelPlate(MWHA024S4) ......................44
17.2.3. ElectronicComponents(MWHA009S4
andMWHA012S4) ...................................45
17.2.4. ElectronicComponents(MWHA018S4) ... 46
17.2.5. ElectronicComponents(MWHA024S4) ... 46
17.2.6. FanDisassembly(MWHA009S4and
MWHA012S4) ..........................................46
17.2.7. FanDisassembly(MWHA018S4) .............47
17.2.8. FanDisassembly(MWHA024S4) .............48
17.2.9. SoundBlanket .......................................... 49
17.2.10.Four-WayValve ........................................ 49
17.2.11. Compressor ..............................................49
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