Page 1
2015 Lennox Industries Inc.
Corp. 1005-L2
CBX32MV
Service Literature
Revised April 7, 2015
CBX32MV (HFC-410A) SERIES UNITS (iComfort
®
-enabled)
NOTICE
A thermostat is not included and must be ordered
separately.
A Lennox iComfort
®
thermostat must be used in
communicating applications.
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 for both communicating and non-
communicating applications is illustrated in diagrams,
which begin on page 24.
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.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take care
while handling this equipment and use protective cloth
ing
.
TABLE OF CONTENTS
Specifications
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Identification
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Heat Data
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upflow/Downflow Unit Dimensions
13
. . . . . . . . . . . . . .
Horizontal LH/RH Unit Dimensions
14
. . . . . . . . . . . . . .
Installation Clearances
15
. . . . . . . . . . . . . . . . . . . . . . . . .
General
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Requirements
15
. . . . . . . . . . . . . . . . . . . . . .
Brazing Connections
19
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensate Drain Requirements
22
. . . . . . . . . . . . . . . .
Inspecting and Replacing Filters
23
. . . . . . . . . . . . . . . . .
Sealing the Unit
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Control Wiring
24
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Handler Control Button, Display and Jumpers
31
. .
Configuring Unit
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Code Recall Mode
43
. . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower Test
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checkout Procedures
44
. . . . . . . . . . . . . . . . . . . . . . . . . .
Operation
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabinet Insulation
45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sequence of Operations
47
. . . . . . . . . . . . . . . . . . . . . . .
Unit Components
60
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Heat (ECB40)
66
. . . . . . . . . . . . . . . . . . . . . . . . .
This indoor unit is designed for installation with optional
field-installed electric heat and a matched remote outdoor
unit that is charged with HFC-410A refrigerant. These units,
designed for indoor installation in multiple positions, are
completely assembled for upflow and horizontal right-hand
discharge before being shipped from the factory.
All CBX32MV air handlers are equipped with a
factory-installed, internally mounted check expansion
valve (CTXV), which is suitable for use in HFC-410A
applications.
This air handler is compatible with the ComfortSense® 7000
non-communicating thermostat and non- communicating
outdoor units. In addition, newer model units have the
enhanced capability of communicating with iComfort
®
thermostats and compatible outdoor units using the Lennox
RSBus protocols.
NOTE -
For downflow or horizontal left-hand air discharge,
certain field modifications are required.
This document provides information only on the
CBX32MV-XXX-230-6-06
and later which features the new
iComfort
-enabled hardware. Refer to
Corp. 0206-L3
for
earlier model service related information.
