INSTALLATION
INSTRUCTIONS
©
2021 Lennox Industries Inc.
Dallas, Texas, USA
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 Specifications 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.
This wall-mounted indoor unit is matched with an outdoor
heat pump unit to create a mini-split system that uses
HFC-410A refrigerant.
3PC036 Outdoor Unit with
3WMC036 Indoor Unit
SINGLE-ZONE MINI-SPLIT SYSTEM
(208/230V)
507784-02 10/2021
Supersedes 507784-01
Table of Contents
General ...........................................................................1
Included Parts.................................................................2
Model Number Identification
...........................................3
Indoor / Outdoor Unit Match-Ups
....................................4
Typical System Components ..........................................4
System Dimensions ........................................................5
Outdoor Units ........................................................................5
Indoor Units ...........................................................................6
System Clearances ........................................................7
Outdoor Unit ..........................................................................7
Indoor Unit .............................................................................7
Torque Requirements for Caps and Fasteners...............8
Indoor Unit Installation
....................................................8
Unit Placement Considerations .............................................8
Determining Wall Mounting Plate Location ...........................8
Installation of Wall Mounting Plate ........................................8
Installation of Wall Sleeve .....................................................9
Installation of Indoor Unit on Wall Mounting Plate .................9
Indoor Unit Condensate Piping Connections ........................9
Outdoor Unit Installation
...............................................10
Placement Considerations ..................................................10
Direct Sunlight, Rain, Snow and Ice Protection...................10
Prevailing Winds ..................................................................11
Buried Refrigerant Pipe Protection ......................................12
Outdoor Unit Condensate Piping.........................................12
Securing the Outdoor Unit ...................................................12
Refrigerant Piping Connections ....................................13
Leak Test and Evacuation
............................................15
Leak Test .............................................................................15
Triple Evacuation Procedure ...............................................15
Wiring Connections ......................................................16
Outdoor Unit .......................................................................16
Indoor Unit ...........................................................................16
Unit Start-Up
.................................................................18
Adding Refrigerant for Longer Line Set ........................18
Troubleshooting ............................................................19
Test Run .......................................................................20
Pre-Checks..........................................................................20
Procedure ............................................................................20
Double-Check Pipe Connections ........................................20
If Ambient Temperature is below 60°F (16°C) .....................20
Manual Control Button
..................................................21
Dry Mode Operation (Dehumidification)
.......................21
Procedure ............................................................................21
Sequence of Operation .......................................................21
Self Clean Feature........................................................22
User Information
...........................................................22
Indoor Unit Display ..............................................................22
Unit Features .......................................................................23
Louver Operations ...............................................................24
Manual Operation (without remote) .....................................24
Air Filter Reminders (Optional) ............................................24
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
