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504,540M
*P504540M*
04/04
*2P0404*
©2002 Lennox Industries Inc.
Dallas, Texas
HSXA12 Outdoor Unit
HSXA12 outdoor units use R410A which is an ozone
friendly HFC refrigerant. This unit must be installed with a
matching indoor coil and line set as outlined in the Lennox
Engineering Handbook. HSXA12 outdoor units are de-
signed for use in expansion valve (TXV) and fixed orifice
systems. Refer to the Lennox Engineering Handbook for
expansion valve kits which must be ordered separately. A
filter dryer approved for use with R410A has been shipped
with the unit. This component must be installed prior to op-
erating the unit. Failure to install the provided filter dryer
will void the warranty.
Shipping and Packing List
1 − Assembled HSXA12 outdoor unit
1 − Liquid line filter drier (approved for use with R410A
systems)
1 − Fixed orifice refrigerant metering device
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
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.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox’ Engineering Handbook. Coils
previously charged with R22 must be flushed.
INSTALLATION
INSTRUCTIONS
HSXA12 Series Units
CONDENSING UNITS
504,540M
04/04
Supersedes 12/03
Table of Contents
HSXA12 Outdoor Unit 1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping And Packing List 1. . . . . . . . . . . . . . . . . . . . . . .
General Information 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Unit 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Existing Line Set & Indoor Coil 5. . . . . . . . . . .
Refrigerant Metering Device 11. . . . . . . . . . . . . . . . . . . .
Manifold Gauge Set 11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Valves 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−up 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 18. . . . . . . . . . . . . . . . . . . . . . . . . .
HSXA12 Check Points 19. . . . . . . . . . . . . . . . . . . . . . . . .
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
General Information
These instructions are intended as a general guide and do
not supersede national or 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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