Lennox MMDB Service Manual

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6.3. TerminalConnections ................................................................37
7. Wired and Wireless Remotes ...................................................39
7.1. 22U49WirelessRemote ............................................................39
7.2. 22U50WirelessRemote ............................................................39
7.3. 22U52WirelessRemote ............................................................39
7.4. M0STAT61Q-1andM0STAT61Q-2WiredRemotes..................39
8. Connection to Centralized Controller, ON/OFF and
Alarm Devices ..........................................................................40
8.1. SetIndoorUnitAddressforCentralizedControl
(UsedwithVRFOnly) ................................................................40
8.2. CentralizedController ................................................................41
8.3. ON/OFFDevices .......................................................................41
8.4. AlarmDevices ...........................................................................41
8.5. ConnectingCables ....................................................................41
Outdoor Unit Information ..............................42
9. Single and Multiple Zone Outdoor Units .................................42
9.1. ModelNumberIdentication ......................................................42
9.2. MPCSingle-ZoneSpecications(0.75-1.5Ton) ......................43
9.3. MPCSingle-ZoneSpecications(2-4Ton) ..............................44
9.4. 3PCSingle-ZoneSpecications ................................................45
9.5. MLBSingle-ZoneSpecications(0.75-2Ton) .........................46
9.6. MLBSingle-ZoneSpecications(3-4Ton) ..............................47
9.7. MPCMulti-ZoneSpecications(1.5-2.5Ton) ..........................48
9.8. MPCMulti-ZoneSpecications(3-4Ton) ................................49
9.9. MLBMulti-ZoneSpecications(1.5-3Ton) ..............................50
9.10. MLBMulti-ZoneSpecications(4Ton) ......................................51
9.11. Single-ZoneOutdoorUnitDimensions ......................................52
9.12. Multi-ZoneOutdoorUnitDimensions ........................................53
9.13. OutdoorUnitClearances ...........................................................54
10. Indoor / Outdoor Unit Combinations .......................................56
10.1. MPCMulti-ZoneSystemCombinations .....................................56
10.2. MLBMulti-ZoneSystemCombinations .....................................62
11. Refrigeration Pipe Work ...........................................................65
11.1. MPCand3PCSingle-ZoneRefrigerantCycleDiagram ............65
11.2. MPCTwo-ZoneRefrigerantCycleDiagram ..............................65
11.3. MPCThree-ZoneRefrigerantCycleDiagram............................66
11.4. MPCFour-ZoneRefrigerantCycleDiagram .............................66
11.5. MPCFive-ZoneRefrigerantCycleDiagram ..............................67
11.6. MLBSix-ZoneRefrigerantCycleDiagram ................................67
11.7. Single-ZonePipingLimitations ..................................................68
11.8. Multi-ZonePipingLimitations ....................................................68
12. Master Valves (3 to 5 Zone Outdoor Units) .............................70
13. MPC Multi-Zone Outdoor Unit Connections and
Line Set Usage ..........................................................................71
14. MLB Multi-Zone Outdoor Unit Connections and
Line Set Usage ..........................................................................79
15. Power and Communication Wiring for Systems ................... 83
16. Outdoor Unit Condensate Piping ............................................84
17. MPC Condensate Pump Diagrams ..........................................85
18. Installation Requirements ........................................................ 86
18.1. TorqueRequirements ................................................................86
18.2. PipeLengthandElevation .........................................................86
19. Electronic Function...................................................................89
19.1. Abbreviations .............................................................................89
19.2. ElectricControlWorkingEnvironment. ......................................89
20. Start-Up ......................................................................................89
20.1. AddingRefrigerant-Single-ZoneSystems ...............................89
20.2. AddingRefrigerant-Multi-ZoneSystems ..................................90
21. Single-Zone Outdoor Unit LED Locations ..............................91
22. Multi-Zone Outdoor Unit LEDs and SW1 Locations ..............92
23. SpecicationsandOperations ................................................93
24. Pressure on Service Port .........................................................94
24.1. CoolingCharts ...........................................................................94
24.2. HeatingChart ............................................................................94
24.3. CapacityRequestCalculations ..................................................95
24.4. DefrostControl ..........................................................................98
24.5. DefrostTheory ...........................................................................98
24.6. DefrostTermination....................................................................98
24.7. OutdoorFanControl ..................................................................99
24.8. Four-WayValveControl ...........................................................100
24.9. ElectronicExpansionValve(EXV)Control ..............................100

Lennox MMDB Specifications

General

Brand	Lennox
Model	MMDB
Category	Air Conditioner
Language	English