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© 2007 Lennox Industries Inc.
Corp. 0719−L5
14HPX
Service Literature
1.5 to 5 ton
Revised 06−2008
14HPX SERIES UNITS
The 14HPX is a residential split-system heat pump. The
series is designed for use with expansion valves (TXV) and
HFC−410A refrigerant. All 14HPX units utilize scroll compres-
sors.
14HPX series units are available in 1−1/2, 2, 2 -1/2, 3, 3
-1/2, 4 and 5 ton capacities. All major components (indoor
blower and coil) must be matched according to Lennox rec-
ommendations for the compressor to be covered under
warranty. Refer to the Engineering Handbook for approved
system matchups.
This manual is divided into sections which discuss the
major components, refrigerant system, charging proce-
dure, maintenance and operation sequence.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are subject
to change.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect electronic
components. Take precautions during unit instal-
lation and service to protect the unit’s electronic
controls. Precautions will help to avoid control
exposure to electrostatic discharge by putting
the unit, the control and the technician at the
same electrostatic potential. Neutralize electro-
static charge by touching hand and all tools on an
unpainted unit surface before performing any
service procedure.
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.
Failure to follow this warning may result in person-
al injury or death.
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
Table of Contents
Specifications / Electrical Data Page 2. . . . . . . . .
I Unit Components Page 4. . . . . . . . . . . . . . . . . . .
II Refrigerant System Page 14. . . . . . . . . . . . . . . . .
III Charging Page 17. . . . . . . . . . . . . . . . . . . . . . . . .
IV Maintenance Page 22. . . . . . . . . . . . . . . . . . . . . .
V Diagrams Page 23. . . . . . . . . . . . . . . . . . . . . . . . .
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