Lennox MCA Series

2
8.3.4. -018(208/230V) .................................... 19
8.3.5. -024(208/230V) .................................... 19
8.4. Outdoor Unit Dimensions...................................... 20
8.5. OutdoorUnitClearances ...................................... 21
8.5.1. SingleUnits ............................................ 21
8.5.2. Multiple Units .......................................... 21
9. Refrigeration Pipe Work ..........................22
9.1. Single-ZoneRefrigerantCycleDiagram ............... 22
9.2. Single-ZonePipingLimitations ............................. 22
10. Outdoor Unit Connections and Line
Set Usage .................................................23
10.1. PipeLength........................................................... 23
10.2. Torque Requirements ........................................... 23
11. Power and Communication Wiring for
Systems ...................................................24
12. Outdoor Unit Diagrams ...........................24
13. Installation Requirements ....................... 25
13.1. GasLeakCheckwithSoapWater: ....................... 25
13.2. AirandMoisture.................................................... 25
13.3. AirPurgingusingaVacuumPump ....................... 25
13.4. AddingRefrigerantifPipeLengthExceeds
ChargeLessPipeLength ..................................... 25
13.5. AddRefrigerantafterLong-TermSystem
Operation .............................................................. 25
13.6. ServicingIndoorUnitRefrigerationCircuit............ 26
13.6.1. CollectingRefrigerantintoOutdoorUnit 26
13.6.2. AirPurgingwithVacuumPump .............. 26
13.7. EvacuationafterServicingtheOutdoorUnit
RefrigerationCircuit .............................................. 26
13.7.1. EvacuationoftheComplete
RefrigerationCircuit,Indoorand
Outdoor Unit ........................................... 26
13.7.2. RefrigerantCharging .............................. 27
14. Electronic Function .................................27
14.1. Abbreviation .......................................................... 27
14.2. ElectricControlWorkingEnvironment. ................. 27
15. Adding Refrigerant - Single-Zone
Systems ....................................................27
16. Single-Zone Outdoor Unit LED
Locations .................................................. 27
17. SpecicationsandOperations ...............28
17.1. CoolingChart ........................................................ 29
17.2. CapacityRequestCalculations ............................. 29
17.3. OutdoorFanControl ............................................. 30
17.3.1. CoolingMode ......................................... 30
18. Indoor and Outdoor Unit Disassembly ..32
18.1. IndoorUnit(AllModels) ........................................ 32
18.1.1. FrontPanel ............................................. 32
18.1.2. ElectricalParts ....................................... 34
18.1.3. Evaporator .............................................. 36
18.1.4. FanMotorandFan ................................. 37
18.1.5. Step Motor .............................................. 37
18.1.6. DrainHose ............................................. 37
18.2. Outdoor Unit ......................................................... 38
18.2.1. PanelPlate(MWCA009S4,
MWCA012S4andMWCA018S4)........... 38
18.2.2. PanelPlate(MWCA024S4) .................... 39
18.2.3. ElectronicComponents(MWCA009S4
andMWCA012S4) ................................. 40
18.2.4. ElectronicComponents(MWCA018S4) . 40
18.2.5. ElectronicComponents(MWCA024S4) . 40
18.2.6. FanDisassembly(MWCA009S4and
MWCA012S4) ........................................ 41
18.2.7. FanDisassembly(MWCA018S4) ........... 42
18.2.8. FanDisassembly(MWCA024S4) ........... 42
18.2.9. SoundBlanket ........................................ 43
18.2.10. Compressor ............................................ 43