INSTALLATION
INSTRUCTIONS
©
2017 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, ser vice or
maintenance can cause property damage, personal
injury or loss of life.
Installation and service must be performed by a li censed
professional HVAC installer (or equivalent) or a service
agency.
WARNING
The clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs, and HFCs) as of July, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for non-compliance.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
General
Refer to the Product Specications bulletin (EHB) for more
product information.
These instructions are intended as a general guide and
do not supersede local or national codes in any way.
Authorities having jurisdiction should be consulted before
installation.
The MWMA, MWMB, M22A, M33A, M33B, MMDA, MCFA
and MCFB indoor units are matched with a two to ve port
multi-zone outdoor heat pump unit to create a mini-split
system that uses HFC-410A refrigerant.
MPA, MPB and MLA
MULTI-ZONE OUTDOOR
UNITS
MULTI-ZONE MINI-SPLIT OUTDOOR UNITS
(208/230V) --
507549-05
3/2017
Supersedes 10/2016
Table of Contents
General ...........................................................................1
Included Parts.................................................................2
Compatible Indoor Units .................................................2
Model Number Identication ...........................................2
Typical Multi-Zone System Components ........................3
Outdoor Unit Dimensions ...............................................4
Outdoor Unit Clearances ................................................4
Torque Requirements for Caps and Fasteners...............5
Outdoor Unit Installation .................................................5
Placement Considerations ..........................................5
Direct Sunlight, Rain, Snow and Ice Protection ..........5
Prevailing Winds .........................................................6
Buried Refrigerant Pipe Protection .............................7
Outdoor Unit Condensate Piping ................................7
Securing the Outdoor Unit ..........................................7
Refrigerant Piping Connections ......................................8
Indoor Unit Installation ....................................................9
Connecting Multiple Capacity Indoor Units .................9
Indoor / Outdoor Unit Match-Ups ..............................11
Leak Test and Evacuation ............................................16
Leak Test ..................................................................16
Triple Evacuation Procedure .....................................16
Wiring Connections ......................................................16
Outdoor Unit .............................................................17
Indoor Units...............................................................17
Unit Start-Up .................................................................24
Refrigerant Charge .......................................................24
WARNING
This product contains a chemical known to the State
of California to cause cancer, birth defects, or other
reproductive harm.
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