Lennox MWCA009S4, Service Manual

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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. Specifications 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