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2013 Lennox Industries Inc.
Corp. 1252-L11
July 24, 2013 (Revised on Dec. 11, 2014)
XP25
INSTALLATION AND SERVICE
PROCEDURE
Service Literature
Dave Lennox
Signature
®
Collection XP25 Series Units
IMPORTANT
This unit has refrigerant piping requirements that are
unique to this this model. Size and install the refrigerant
piping per table 2 (page 14) to ensure proper unit operation.
This unit is an integral component of a system that requires an
iComfort Wi-Fi
®
thermostat and iComfort
®
-enabled air handler
or furnace.
XP25 Heat
Pump
iComfort Wi-Fi
®
Thermostat
iComfort
™
-enabled
air handler or
furnace
IMPORTANT: Before applying any power (main, solar or low
voltage) to the outdoor unit, confirm iComfort Wi-Fi
®
thermostat
has Version 2.1 or higher software. (Reference iComfort Wi-Fi
®
thermostat manual.)
WARNING
I
mproper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property. Installation and service must be
performed by a licensed professional installer (or
equivalent) or a service agency.
TABLE OF CONTENTS
I. OVERVIEW
Model Number Identification
. . . . . . . . . . . . . . . . . . . .
Typical Serial Number Identification
. . . . . . . . . . . . . .
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Unit Parts Arrangement
. . . . . . . . . . . . . . . . .
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Service Valves
. . . . . . . . . . . . . . . . . . . . . . .
II. INSTALLATION
Unit Placement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and Installing Panels
. . . . . . . . . . . . . . . . .
New or Replacement Line Set
. . . . . . . . . . . . . . . . . .
Brazing Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing the System
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing the System
. . . . . . . . . . . . . . . . . . . . . . .
Evacuating the System
. . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge
. . . . . . . . . .
Unit Start-Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III. SYSTEM OPERATION AND SERVICE
7-Segment Alert and System Status Codes
. . . . . . .
Outdoor Control Push-Button Operation
. . . . . . . . . .
Configuring Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reconfiguring Outdoor Control using iComfort Wi-Fi
®
Thermostat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Information
. . . . . . . . . . . . . . . . . . . . . . . . .
Defrost Function
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Temperature Operational Range
. . . . . . . . .
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SunSource
®
Home Energy System
. . . . . . . . . . . . . .
Unit Wiring Diagrams
. . . . . . . . . . . . . . . . . . . . . . . . . .
Factory Wiring Diagrams
. . . . . . . . . . . . . . . . . . . . . . .
Unit Sequence of Operations
. . . . . . . . . . . . . . . . . . .
Component Testing
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs AND HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
