05/04
*2P0504*
504,777M
*P504777M*
®
2002 Lennox Industries Inc.
Dallas, Texas
HPXA12 Outdoor Unit
HPXA12 Elite
®
outdoor units use R410A, which is an ozone
friendly HFC refrigerant. This unit must be installed with a
matching indoor blower coil and line set as outlined in the
Lennox Engineering Handbook. HPXA12 outdoor units are
designed for use in expansion valve systems only. They
are not designed to be used with other refrigerant flow con-
trol devices. An expansion valve approved for use with
R410A must be ordered separately and must be installed
prior to operating the unit.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox’ Engineering Handbook. Coils
previously charged with R22 must be flushed
Shipping & Packing List
1 − Assembled HPXA12 outdoor unit
Check the unit components for shipping damage. If you find
any damage, immediately contact the last carrier.
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.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a qualified installer or service
agency.
INSTALLATION
INSTRUCTIONS
HPXA12 SERIES UNITS
HEAT PUMP UNITS
504,777M
05/04
Supersedes 02/04
Table of Contents
HPXA12 Outdoor Unit 1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List 1. . . . . . . . . . . . . . . . . . . . . . . . .
General Information 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Unit 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Existing Line Set & Indoor Coil 6. . . . . . . . . . .
Refrigerant Metering Device 7. . . . . . . . . . . . . . . . . . . . .
Manifold Gauge Set 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Valves 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 18. . . . . . . . . . . . . . . . . . . . . . . . . .
Homeowner Information 18. . . . . . . . . . . . . . . . . . . . . . . .
HPXA12 Check List 20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
General Information
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
This product and/or the indoor unit it is matched with
may contain fiberglass wool.
Disturbing the insulation during installation, mainte-
nance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass wool is known to the State of California to
cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact your
supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
Litho U.S.A.
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