Page 1
© 2005 Lennox Industries Inc.
Corp. 0510−L4
XP19
Service Literature
Revised 06−2008
XP19 SERIES UNITS
The XP19 is a high efficiency residential split−system heat
pump unit, which features a two−step scroll compressor
and R410A refrigerant. XP19 units are available in 2, 3 , 4
and 5 ton sizes. The series is designed for use with an ex-
pansion valve only (approved for use with R410A) in the in-
door unit. This manual is divided into sections which dis-
cuss the major components, refrigerant system, charging
procedure, maintenance and operation sequence.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are
subject to change.
CAUTION
Physical contact with metal edges and corners while
applying excessive force or rapid motion can result
in personal injury. Be aware of, and use caution when
working nearby these areas during installation or
while servicing this equipment.
CAUTION
To prevent personal injury, or damage to panels, unit
or structure, be sure to observe the following:
While installing or servicing this unit, carefully stow
all removed panels out of the way, so that the panels
will not cause injury to personnel, nor cause damage
to objects or structures nearby, nor will the panels be
subjected to damage (e.g., being bent or scratched).
While handling or stowing the panels, consider any
weather conditions, especially windy conditions,
that may cause panels to be blown around and bat-
tered.
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.
DANGER
Shock Hazard
Remove all power at disconnect be-
fore removing access panel.
XP19 units use single-pole contac-
tors. Potential exists for electrical
shock resulting in injury or death.
Line voltage exists at all components
(even when unit is not in operation).
Table of Contents
General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications / Electrical Data 2. . . . . . . . . . . . . . . . . .
I Application 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II Unit Components 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Refrigerant System 18. . . . . . . . . . . . . . . . . . . . . . . . . .
IV Charging 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V Service and Recovery 24. . . . . . . . . . . . . . . . . . . . . . . .
VI Maintenance 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIIBrazing Procedure 24. . . . . . . . . . . . . . . . . . . . . . . . . .
VIII Diagrams and Operating Sequence 25. . . . . . . . . .
To Next Page
Need help?
General