08/06
504,954M
*2P0806*
*P504954M*
Page 1
2006 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.
Installation and service must be performed by a
qualified installer or service agency.
CAUTION
Physical contact with metal edges and corners
while applying excessive force or rapid motion can
result in personal injury. Be aware of, and use
caution when working near these areas during
installation or while servicing this equipment.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox’ Engineering Handbook.
Coils previously charged with HCFC−22 must be
flushed.
IMPORTANT
The Clean Air Act of 1990 bans the intentional vent-
ing of refrigerant (CFC’s, HFC’s, and HCFC’s) as of
July 1, 1992. Approved methods of recovery, recycl-
ing or reclaiming must be followed. Fines and/or in-
carceration may be levied for noncompliance.
INSTALLATION
INSTRUCTIONS
HPXA16
Series Units
HEAT PUMP UNITS
504,954M
08/06
Supersedes 03/06
Table of Contents
HPXA16 Outdoor Unit
1
. . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List
2
. . . . . . . . . . . . . . . . . . . . . . . .
General Information
2
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Unit
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Metering Device
8
. . . . . . . . . . . . . . . . . . . .
Flushing Existing Line Set & Indoor Coil
8
. . . . . . . . . .
Manifold Gauge Set
10
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Valves
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Charging
12
. . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories
21
. . . . . . . . . . . . . . . . . . . . . . . . . .
Check Points
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Homeowner Information:
Maintenance
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat Operation
24
. . . . . . . . . . . . . . . . . . . . . . . . . .
HPXA16 Outdoor Unit
Lennox HPXA16 outdoor units use HFC−410A refrigerant.
This unit must be installed with a matching indoor coil and
line set as outlined in the Lennox Engineering Handbook.
Elite
®
Series HPXA16 outdoor units are designed for use
in check expansion valve (CTXV) systems only and must
not be used with other refrigerant flow control devices.
See Lennox Engineering Handbook list of indoor expan-
sion valve kits (ordered separately).
Litho U.S.A.
