Lennox MPC048S4S - User Manual

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MINI-SPLIT SYSTEMS SERVICE MANUAL

Indoor and Outdoor Unit Information

100029

5/2022

Table of Contents

Indoor Unit Information ...................................3

1. M22A and M33C Cassette Non-Ducted Indoor Units ............... 3

1.1. ModelNumberIdentication ........................................................3

1.2. M22AIndoorUnitSpecications ..................................................3

1.3. M33CIndoorUnitSpecications .................................................4

1.4. M22AIndoorUnitDimensions .....................................................5

1.5. M33CIndoorUnitDimensions .....................................................6

1.6. M22AandM33CIndoorUnitClearances ....................................7

1.7. M22AandM33CIndoorUnitControlBoardSwitches

Location .......................................................................................8

1.8. M22AandM33CCondensateDrainTestProcedure ...................9

2. MMDB Ducted Indoor Units ......................................................10

2.1. MMDBModelNumberIdentication ..........................................10

2.2. MMDBIndoorUnitSpecications .............................................. 11

2.3. IndoorUnitBlowerData ............................................................12

2.4. MMDBIndoorUnitDimensions .................................................18

2.5. MMDBIndoorUnitClearances ..................................................19

2.6. CondensatePumpLift-MMDBandM22A/M33C .....................20

2.7. MMDBCondensateDrainTestProcedure.................................20

2.8. MMDBIndoorUnitGravityDrain ...............................................21

3. MWMC and 3WMC-036 Wall Mounted Indoor Units ............... 22

3.1. ModelNumberIdentication ......................................................22

3.2. IndoorUnitSpecications(009-012Ton)Units ......................23

3.3. IndoorUnitSpecications(018-030Ton)Units .......................23

3.4. IndoorUnitSpecications(3WMC) ...........................................23

3.5. IndoorUnitDimensions(MWMCand3WMC) ...........................24

3.6. IndoorUnitClearances(AllModelsandSizes) .........................25

3.7. MWMCand3WMC036S4UnitControlBoardSwitches

Location .....................................................................................25

3.8. DryModeOperation-MWMCand3WMC ................................26

3.9. TestRun-MWMCand3WMC ..................................................26

3.10. Double-CheckPipeConnections ...............................................26

3.11. AmbientTemperatureisBelow63°F(17°C) .............................27

4. MCFA and MCFB Ceiling / Floor Indoor Units ........................28

4.1. ModelNumberIdentication ......................................................28

4.2. IndoorUnitSpecications(018-048Ton)Units .......................28

4.3. IndoorUnitDimensions .............................................................29

4.4. IndoorUnitClearances ..............................................................30

4.5. MCFAandMCFBIndoorUnitControlBoardSwitches

Location .....................................................................................31

5. MFMA Floor Indoor Unit ...........................................................32

5.1. ModelNumberIdentication ......................................................32

5.2. IndoorUnitSpecications(012Ton)Unit ..................................32

5.3. IndoorUnitDimensions .............................................................33

5.4. IndoorUnitClearances ..............................................................33

6. Indoor and Outdoor Power and Communication

Wiring Requirements ............................................................... 34

6.1. Overview ....................................................................................34

6.2. WiringGuide ..............................................................................35

MCFA and MCFB

M22A and M33C

MMDB

MWMC and 3WMC036

MPC, 3PC, and MLB

Single Zone

MLB and MPC

Multi-Zone

MFMA

Please refer to service manual 100030 for indoor and

outdoor unit error codes and component diagnostics.

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Lennox MPC048S4S Specifications

General

Model	MPC048S4S
Cooling Capacity	48, 000 BTU/h
Cooling Capacity (tons)	4 tons
Refrigerant Type	R-410A
Compressor Type	Scroll
Voltage	208/230V
Phase	1
Sound Level (Outdoor Unit)	76 dB

Summary

M22 A and M33 C Cassette Non-Ducted Indoor Units

M22 A Indoor Unit Specifications

Provides technical specifications for the M22A cassette indoor unit.

MMDB Ducted Indoor Units

MMDB Indoor Unit Specifications

Provides technical specifications for MMDB ducted indoor units.

MWMC and 3 WMC-036 Wall Mounted Indoor Units

Indoor Unit Specifications (009 - 012 Ton) Units

Provides technical specifications for MWMC units of 0.5 to 1 ton capacity.

MCFA and MCFB Ceiling; Floor Indoor Units

Indoor Unit Specifications (018 - 048 Ton) Units

Provides technical specifications for MCFA/MCFB units of 1.5 to 4 ton capacity.

MFMA Floor Indoor Unit

Indoor Unit Specifications (012 Ton) Unit

Provides technical specifications for the MFMA012S4 floor indoor unit.

Indoor and Outdoor Power and Communication Wiring Requirements

Overview

Wiring Guide

Details wiring requirements for single and multi-zone systems, including wire gauge.

Single and Multiple Zone Outdoor Units

MPC Single-Zone Specifications (0.75 - 1.5 Ton)

Provides specifications for MPC single-zone outdoor units from 0.75 to 1.5 tons.

MPC Multi-Zone Specifications (1.5 - 2.5 Ton)

Provides specifications for MPC multi-zone outdoor units from 1.5 to 2.5 tons.

Indoor; Outdoor Unit Combinations

MPC Multi-Zone System Combinations

Lists valid combinations of MPC outdoor units with various indoor units and capacities.

MLB Multi-Zone System Combinations

Lists valid combinations of MLB outdoor units with various indoor units and capacities.

Refrigeration Pipe Work

MPC and 3 PC Single-Zone Refrigerant Cycle Diagram

Single-Zone Piping Limitations

Defines maximum line set lengths and elevation differences for single-zone systems.

Multi-Zone Piping Limitations

Defines piping limitations for multi-zone systems, including line set length and elevation.

Installation Requirements

Torque Requirements

Pipe Length and Elevation

Air Purging using a Vacuum Pump

Evacuation after Servicing the Outdoor Unit Refrigeration Circuit

Start-Up

Adding Refrigerant - Single-Zone Systems

Details how to add refrigerant to single-zone systems based on pipe length.

Adding Refrigerant - Multi-Zone Systems

Explains how to add refrigerant to multi-zone systems based on pipe length and zones.

Pressure on Service Port

Cooling Charts

Provides cooling charge pressure data at different indoor and outdoor temperatures.

Heating Chart

Provides heating charge pressure data at different indoor and outdoor temperatures.

Capacity Request Calculations

Defrost Control

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