Lennox CBX32MV User Manual

06/11 506274−01
*2P0611* *P506274-01*
Page 1
E2011 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 for both communicating and non−
communicating applications is illustrated in diagrams,
which begin on page 13.
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.
Shipping and Packing List
Check unit for shipping damage. Consult last carrier
immediately if damage is found.
Package 1 of 1 contains the following:
1  Assembled air handler unit
2  Downflow shields (if required for downflow
configuration only)
1  Drip shield (for −068 only)
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
®
Collection CBX32MV Units
MULTI−POSITION AIR HANDLER
506274−01
06/11
Supersedes 01/11
RETAIN THESE INSTRUCTIONS FOR FUTURE
REFERENCE
Table of Contents
Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . .
Upflow/Downflow Unit Dimensions 2. . . . . . . . . . . . . .
Horizontal LH/RH Unit Dimensions 3. . . . . . . . . . . . . .
Model Number Identification 4. . . . . . . . . . . . . . . . . . . .
General 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Clearances 4. . . . . . . . . . . . . . . . . . . . . . . . .
Requirements 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Unit 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brazing Connections 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Condensate Drain 11. . . . . . . . . . . . . . . . .
Inspecting and Replacing Filters 12. . . . . . . . . . . . . . . . .
Sealing the Unit 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Control Wiring 13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Handler Control Button, Display and Jumpers 21. .
Target CFM Tables 25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Unit 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Code Recall Mode 35. . . . . . . . . . . . . . . . . . . . . . . .
Indoor Blower Test 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checkout Procedures 36. . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabinet Insulation 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT INFORMATION TO INSTALLER
A
B
D
C
TOP CAP SHIPPING BRACKET (REPLACE
SCREWS IN TOP CAP AFTER REMOVAL).
HORIZONTAL DRAIN PAN (SEE
UPFLOW APPLICATIONS ON PAGE
5 AND DOWNFLOW APPLICATIONS
ON PAGE 8 )
BLOWER HOUSING SUPPORT PAD.
REFRIGERANT LINE PLUGS (SEE BRAZING CONNECTION
ON PAGE 9] .
CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.
FOR PROPER OPERATION THE ELECTRIC HEAT (IF APPLICABLE) MUST BE
CONFIGURED (SET−UP) THROUGH THE AIR HANDLER CONTROL (AHC)
WHENEVER ELECTRIC HEAT IS INSTALLED THE AHC MUST BE
MANUALLY CONFIGURED. SEE JUMPERS AND LINKS GUIDE ON
PAGE 20.
ELECTRIC HEAT SECTIONS MUST BE
CONFIGURED. IF INSTALLED SEE
PROCEDURE IN FIGURE 24 ON PAGE 30.
H
H
CONFIGURE ELECTRIC HEAT
ECB40
Litho U.S.A.

Lennox CBX32MV Specifications

General

Refrigerant	R-410A
Efficiency	High efficiency
Model Number	CBX32MV
Category	Air Handlers
Motor Type	ECM
Voltage	208/230V
Blower Motor	Variable Speed
Cabinet	Painted Steel
Nominal Cooling Capacity	2 to 5 tons
Nominal Airflow	Up to 2000 CFM
Filter Type	Standard
Heating Options	Electric Heat
Cooling Options	Compatible with Lennox air conditioners
Sound Level	Quiet operation

Summary

Shipping and Packing List

Upflow and Downflow Unit Dimensions

Horizontal Left- and Right-Hand Unit Dimensions

Model Number Identification

General

Describes the indoor unit's design, refrigerant type, and compatibility with thermostats.

Installation Clearances

Specifies minimum required distances for cabinet, plenum, and ductwork for safe installation.

Requirements

Outlines essential NFPA standards and unit approval for combustible material installation.

Installing the Unit

Disassemble and Reassemble Air Handler Unit

Instructions for separating and rejoining the two main sections of the air handler unit.

Upflow Application

Procedures for configuring the unit for upflow installation, including drain pan modification.

Horizontal Right-Hand Discharge Application

Steps for configuring the unit for horizontal right-hand discharge, including drip shield placement.

Horizontal Left-Hand Discharge Application

Detailed field modifications required for horizontal left-hand air discharge configuration.

Downflow Application

Guidance for configuring the unit for downflow installations, including drip shields and base.

Brazing Connections

Installing the Condensate Drain

Inspecting and Replacing Filters

Sealing the Unit

Field Control Wiring

Sensor Connections and Wiring Requirements

Discharge Sensor (DAT)

Details on mounting and wiring the discharge air sensor for proper operation.

Outdoor Air Sensor

Information on connecting the outdoor temperature sensor for system communication.

Air Handler Control 9-Pin Connector (P8)

Wiring specifications for the 9-pin connector, including electric heat connections.

Air Handler Control Button, Display and Jumpers

Push Button

How to use the on-board push button for navigating menus and recalling stored error codes.

Jumpers

Explanation of jumper settings for humidification, EvenHeat, blower speed, and delay profiles.

Display

Interpreting the single character LED display for system status, modes, and error codes.

Target CFM Tables

Unit Operating Sequences

Configuring Unit

Air Handler Control Checkout

Procedures for verifying unit configuration, including size code and heat section detection.

Configuring Unit Size Codes (Model Number)

Configuring/Detecting Electric Heat Sections

EVENHEAT OPERATION

EVENHEAT Operation (2 of 2)

Heat Pump Operation (Heating and Cooling)

Cooling Operation

Error Code / Recall Mode

Indoor Blower Test

Checkout Procedures

Operation

Emergency Heat (Heating Heat Pump)

Specific configuration for emergency heat operation with heat pump systems.

Maintenance

Cabinet Insulation

Indoor Unit

Instructions for inspecting, repairing, or replacing internal cabinet insulation for optimal performance.

Routine Maintenance

Outdoor Coil

Recommendations for cleaning and maintaining the outdoor unit's coil for efficient operation.

Preservice Check

Pre-service checks to perform before calling for professional assistance.