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12/10 506640−01
*2P1210* *P506640-01*
Page 1
E20 Lennox Industries Inc.
Dallas, Texas, USA
These instructions are intended as a
general guide and do not supersede
local codes in any way. Consult
authorities having jurisdiction before
installation.
RETAIN THESE INSTRUCTIONS FOR FUTURE
REFERENCE
NOTICE TO INSTALLER
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 11 to avoid damaging the service valve’s internal seals.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HFCs, and HCFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox XP16 Engineering Handbook.
Coils previously charged with HCFC−22 must be
flushed.
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 near these areas during installation or while
servicing this equipment.
INSTALLATION
INSTRUCTIONS
Elite
®
Series XP16 Units
HEAT PUMPS
506640−01
12/10
Supersedes 11/10
TABLE OF CONTENTS
Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . .
General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Identification 2. . . . . . . . . . . . . . . . . . . .
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . . .
Caps and Fasteners Torque Requirements 3. . . . . . . .
Operating Gauge Set and Service Valves 3. . . . . . . . .
Recovering Refrigerant from Existing System 5. . . . .
New Outdoor Unit Placement 6. . . . . . . . . . . . . . . . . . .
Removing and Installing Panels 8. . . . . . . . . . . . . . . . .
Line Set Requirements 9. . . . . . . . . . . . . . . . . . . . . . . . .
Brazing Connections 11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Refrigerant Metering Device Removal and
Flushing Line Set and Indoor Coil 14. . . . . . . . . . . . . . . .
Installing New Indoor Metering Device 15. . . . . . . . . . . .
Leak Test Line Set and Indoor Coil 16. . . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil 17. . . . . . . . . . . . .
Electrical Connections 18. . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start−Up 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing and Weighing In Refrigerant for Units
Delivered Void of Charge 24. . . . . . . . . . . . . . . . . . . . . . .
Optimizing System Refrigerant Charge 26. . . . . . . . . . .
System Operation 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Two−Stage Modulation Compressors Checks 40. . . . . .
Maintenance 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklists 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
Check unit for shipping damage. Consult last carrier
immediately if damage is found.
1 − Assembled outdoor unit
General
The XP16 outdoor unit uses HFC−410A refrigerant. This
unit must be installed with a matching indoor blower coil
and line set as outlined in the XP16 Lennox Engineering
Handbook. Elite
®
Series outdoor units are designed for
use in check / expansion valve (CTXV) systems only and
are not to be used with other refrigerant flow control
devices. An indoor coil check / expansion valve approved
for use with HFC−410A must be ordered separately and
installed prior to operating the unit.
Litho U.S.A.