Page 1
504,532M
*P504532M*
06/04
*2P0604*
2002 Lennox Industries Inc.
Dallas, Texas, USA
®
12HPB Outdoor Units
Lennox Merit
®
Series 12HPB outdoor units are approved
and warranted only for installation with specially
matched indoor coils, line sets, and refrigerant control
devices as designated by Lennox. Refer to Lennox engi-
neering handbook for expansion valve (TXV) kits which
must be ordered separately.
Shipping and Packing List
1 − Assembled 12HPB outdoor unit
Check unit for shipping damage. Consult last carrier imme-
diately if damage is found.
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
12HPB Series Units
HEAT PUMP UNITS
2 through 5 tons
504,532M
06/04
Supersedes 04/04
Table of Contents
12HPB Outdoor Units
1
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping & Packing List
1
. . . . . . . . . . . . . . . . . . . . . . . . .
General Information
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Unit
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Piping
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Metering Device
10
. . . . . . . . . . . . . . . . . . . .
Manifold Gauge Set
10
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Valves
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evacuation
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
18
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories
18
. . . . . . . . . . . . . . . . . . . . . . . . . .
Start−Up and Performance Check List
18
. . . . . . . . . . . .
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. Authori-
ties having jurisdiction should be consulted before installa-
tion.
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.
