06/10
506518−01
*2P0610*
*P506518-01*
Page 1
E
2010 Lennox Industries Inc.
Dallas, Texas, USA
NOTICE
A thermostat is not included and must be ordered
separately.
D
The Lennox icomfort Touch thermostat must be used
in communicating applications.
D
In non−communicating applications, the Lennox
ComfortSense
®
7000 thermostat may be used, as well
as other non−communicating thermostats.
In all cases, setup is critical to ensure proper system
operation.
Field wiring examples for non−communicating
applications begin on page 23.
See the icomfort Touch
t
thermostat
Quick Start Guide
for communicating and partial communicating field
wiring connections.
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.
General
This outdoor unit is designed for use with HFC−410A
refrigerant only. This unit must be installed with an
approved indoor air handler or coil. See the Lennox XC21
Engineering Handbook for approved indoor component
matchups.
IMPORTANT
This model is designed for use in expansion valve
systems only. An indoor expansion valve approved for
use with
HFC−410A
refrigerant must be ordered
separately, and installed prior to operating the system.
INSTALLATION
INSTRUCTIONS
Dave Lennox
Signature
®
Collection XC21
System
AIR CONDITIONER
506518−01
06/10
Supersedes 05/10
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
TABLE OF CONTENTS
General
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
1
. . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Identification
2
. . . . . . . . . . . . . . . . . . . .
Unit Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . . . . .
Operating Gauge Set and Service Valves
4
. . . . . . . . .
Recovering Refrigerant from Existing System
6
. . . . .
New Outdoor Unit Placement
7
. . . . . . . . . . . . . . . . . . .
Removing and Installing Panels
10
. . . . . . . . . . . . . . . . .
New or Replacement Line Set
11
. . . . . . . . . . . . . . . . . . .
Flushing the System
14
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Leak Testing the System
16
. . . . . . . . . . . . . . . . . . . . . . .
Evacuating the System
16
. . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A175 Main Control Jumpers and Terminals
22
. . . . . . .
Field Control Wiring
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge
25
. . . . . . . . . .
Unit Start−Up
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant
25
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating and Temperature Pressures
29
. . . . . . . . . . .
System Operations
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
A175 Main Control LED System Status
and Alert Codes
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance (Dealer and Homeowner)
42
. . . . . . . . . . .
Checklists
50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
Check unit for shipping damage. Consult last carrier
immediately if damage is found.
1 Assembled outdoor unit.
1 Bag assembly which includes the following:
1 Bushing (for low voltage wiring)
2 Isolation grommets for liquid and suction lines
Litho U.S.A.
Summary of Contents for XC21
Page 21: ...Page 21 XC21 SERIES Figure 8 Typical XC21 Wiring ...
Page 39: ...Page 39 XC21 SERIES Figure 19 High Pressure Switch Operation ...
Page 40: ...Page 40 506518 01 Figure 20 Low Pressure Switch Operation ...
Page 41: ...Page 41 XC21 SERIES Figure 21 High Discharge Temperature Sensor Operation ...
