Lennox MWHA018S4-1P User Manual

1
MINI-SPLIT SYSTEMS SERVICE MANUAL
MHA Series Unit Information
CORP1913-L8
11/2020
Table of Contents
1. Indoor Units ................................................3
1.1. ModelNumberIdentication ..................................... 3
1.2. IndoorUnitSpecications ......................................... 3
1.3. IndoorUnitDimensions ............................................4
1.4. IndoorUnitClearances ............................................. 4
1.5. IndoorUnitWallMounts ...........................................5
1.6. Indoor/OutdoorMatches ........................................... 5
2. Air Throw Data ...........................................6
3. Power and Communication Wiring for
Systems .....................................................7
3.1. Overview ...................................................................7
3.2. WireGauge...............................................................7
3.3. TerminalConnections ...............................................8
4. Indoor Unit Diagrams ................................8
5. Wireless Remote ........................................ 9
5.1. Requirements ...........................................................9
5.2. RemoteControlSpecications .................................9
6. Connection to Centralized Controller .... 11
6.1. SetIndoorUnitAddressforCentralizedControl(Used
withVRFOnly) ........................................................ 11
6.2. IndoorUnitConnectionPointsforCentralized
Controller ................................................................12
6.3. DryModeOperation-IndoorUnits .........................12
6.3.1. Procedure .................................................12
6.3.2. DryModeOperationSequence ................13
6.4. TestRun-IndoorUnits ........................................... 13
6.4.1. TestRunInstructions ................................13
6.4.2. BeforeTestRun ........................................13
6.5. Double-CheckPipeConnections ............................13
6.6. AmbientTemperatureisBelow63°F(17°C) ........... 13
7. Single Zone Outdoor Units .....................15
7.1. ModelNumberIdentication ................................... 15
7.2. Specications..........................................................15
7.3. CoolingandHeatingCapacities .............................16
7.3.1. Cooling-009(115V) ................................16
7.3.2. Heating-009(115V) ................................17
7.3.3. Cooling-009(208/230V) .........................17
7.3.4. Heating-009(208/230V) ......................... 18
7.3.5. Cooling-012(115V) ................................18
7.3.6. Heating-012(115V) ................................19
7.3.7. Cooling-012(208/230V) .........................19
7.3.8. Heating-012(208/230V) ......................... 20
7.3.9. Cooling-018(208/230V) .........................20
7.3.10. Heating-018(208/230V) ......................... 21
7.3.11. Cooling-024(208/230V) .........................21
7.3.12. Heating-024(208/230V) ......................... 22
MHA Single Zone Air
Conditioning Outdoor Unit
MWHA Wall Mount Single Zone
Air Conditioning Indoor Unit
Please refer to Corp1914-L8 for indoor and outdoor unit error codes and component diagnostics.

Lennox MWHA018S4-1P Specifications

General

Brand	Lennox
Model	MWHA018S4-1P
Category	Air Conditioner
Language	English