11/10
506212−01
*2P1110*
*P506212-01*
Page 1
E
2010 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS FOR
FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
Improper 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.
General
The Lennox XPG15 outdoor units use HFC−410A
refrigerant. This unit must be installed with a matched
indoor coil and line set as outlined in the Lennox
Engineering Handbook. XPG15 series outdoor units are
designed for use in check expansion valve systems only,
and are not designed to be used with other refrigerant flow
control devices. The Lennox Engineering Handbook lists
compatible indoor check expansion valve kits which are
ordered separately.
The Lennox dedicated dual−fuel XPG15 outdoor unit
technology allows the system to alternate between heat
pump heating when outdoor temperature is ABOVE 32°F
{0°C} and automatically switching over to gas furnace
heating when outdoor temperature is BELOW 32°F {0°C},
making the most efficient use of fuel sources.
INSTALLATION
INSTRUCTIONS
Dave Lennox
Signature
®
Collection XPG15
Units
DUAL−FUEL HEAT PUMP UNITS
506212−01
11/10
Supersedes 10/09
TABLE OF CONTENTS
General
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Identification
2
. . . . . . . . . . . . . . . . . . . .
Unit Parts Arrangement
4
. . . . . . . . . . . . . . . . . . . . . . . .
Control Panel Parts Arrangement
4
. . . . . . . . . . . . . . .
Shipping and Packing List
5
. . . . . . . . . . . . . . . . . . . . . .
Operating Gauge Set and Service Valves
5
. . . . . . . .
Recovering Refrigerant from Existing System
7
. . . . .
Unit Placement
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing and Installing Panels
10
. . . . . . . . . . . . . . . . .
New or Replacement Line Set
12
. . . . . . . . . . . . . . . . . .
Brazing Connections
14
. . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Line Set and Indoor Coil
17
. . . . . . . . . . . . . . .
Installing Indoor Expansion Valve
18
. . . . . . . . . . . . . . .
Leak Test Line Set and Indoor Coil
19
. . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil
20
. . . . . . . . . . . . .
Electrical
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Setup Information
25
. . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge
30
. . . . . . . . . .
Unit Start−Up
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Charge
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Coil Matchups
34
. . . . . . . . . . . . . . . . . . . . . . . . . .
Operating and Temperature Pressures
35
. . . . . . . . . .
System Operations
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dealer Maintenance
53
. . . . . . . . . . . . . . . . . . . . . . . .
Homeowner Maintenance
53
. . . . . . . . . . . . . . . . . . .
Sound Reduction (SR1) Cover
55
. . . . . . . . . . . . . . . . . .
Start−Up and Performance Checklist
55
. . . . . . . . . . . . .
ATTENTION INSTALLERS
The ComfortSense 5000 and 7000 are the
ONLY room thermostats approved
by Lennox for use with the XPG15 series heat pump.
COMFORTSENSE
®
5000
CATALOG# X4147
COMFORTSENSE
®
7000
System setup information and field wiring connections for both thermostat
models are available starting on page 25.
IMPORTANT Setup is critical to ensure proper system operation.
Thermostat is not included and must be purchased separately.
CATALOG# Y0349
Litho U.S.A.
