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504,712M
*P504712M*
06/04
*2P0604*
2002 Lennox Industries Inc.
Dallas, Texas, USA
®
HP27 Outdoor Unit
HP27 outdoor units are designed for expansion valve sys-
tems only. They are not designed for RFC systems. Refer to
Lennox engineering handbook for expansion valve kits
which you must order separately.
Shipping & Packing List
1 − Assembled HP27 outdoor unit
2 − Grommets (for liquid and vapor lines)
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
The Clean Air Act of 1990 bans the intentional vent-
ing of refrigerant (CFC’s and HCFC’s) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarcera-
tion may be levied for noncompliance.
INSTALLATION
INSTRUCTIONS
HP27 SERIES UNITS
HEAT PUMP UNITS
504,712M
06/04
Supersedes 12/03
Table of Contents
HP27 Outdoor Unit
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List
1
. . . . . . . . . . . . . . . . . . . . . . . . .
General Information
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Unit
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Metering Device
10
. . . . . . . . . . . . . . . . . . . .
Service Valves
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manifold Gauge Set
13
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP27 Check Points
18
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
