General; Installation Clearances; Installation Requirements - Lennox CBX32MV-018/024 Manual

General

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.
NOTE - For downflow or horizontal left-hand air discharge,
certain field modifications are required.
These instructions are intended as a general guide and do
not supersede local or national codes in any way. Consult
authorities having jurisdiction before installation. Check
equipment for shipping damage; if found, immediately
report damage to the last carrier.

Installation Clearances

Cabinet
To Plenum
To Outlet Duct within 3 feet (914
mm)
Floor
Service / Maintenance
1
Units installed on combustible floors in the down-flow position with
electric heat require optional down-flow additive base.
2 Front Service Access - 24 inches (610mm) minimum.
NOTE - If cabinet depth is more than 24 inches (610 mm), allow a
minimum of the cabinet depth plus 2 inches (51 mm).
WARNING
The State of California has determined that this product
may contain or produce a chemical or chemicals, in very
low doses, which may cause serious illness or death. It
may also cause cancer, birth defects, or reproductive
harm.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
WARNING
During blower operation, the ECM motor emits energy
that may interfere
Interference is reduced by both the sheet metal cabinet
and distance.
0 inch (0 mm)
1 inch (25 mm)
1 inch (25 mm)
See Note #1
See Note #2
with pacemaker operation.
Improper installation of the air handler can result in
personal injury or death.
Do not allow external combustion products or other
contaminants to enter the return air system or to be mixed
with air that will be supplied to the living space. Use sheet
metal screws and joint tape or duct mastic to seal return
air system to air handler. In platform installations, the air
handler should be sealed airtight to the return air plenum.
A door must never be used as a portion of the return air
duct system. The base must provide a stable support and
an airtight seal to the air handler. Allow absolutely no
sagging, cracks, gaps. etc.
For no reason should return and supply air duct systems
ever be connected to or from other heating devices such
as a fireplace or stove. etc. Fire, explosion, carbon
monoxide poisoning, personal injury and/or property
damage could result.
Requirements
In addition to conforming to manufacturer's installation
instructions and local municipal building codes, installation
of Lennox air handler units (with or without optional electric
heat), MUST conform with the following National Fire
Protection Association (NFPA) standards:
S
NFPA No. 90A — Standard for Installation of Air
Conditioning and Ventilation Systems
S
NFPA No. 90B — Standard for Installation of Residence
Type Warm Air Heating and Air Conditioning Systems
This unit is approved for installation clearance to
combustible material as stated on the unit rating plate.
Accessibility and service clearances must take precedence
over combustible material clearances.

Installation Requirements

CBX32MV units are factory-configured for upflow and
horizontal right-hand discharge installation. For downflow or
horizontal left-hand discharge, certain field modifications are
required.
DISASSEMBLE AND REASSEMBLE AIR HANDLER
UNIT
This unit consists of two sections which are shipped
assembled from the factory. If necessary, the unit may be
disassembled to facilitate setting the unit. Follow the steps
below:
To disassemble:
1. Remove access panels.
2. Remove both blower and coil assemblies. This will
lighten the cabinet for lifting.
3. Remove one screw from the left and right posts inside
the unit. Remove one screw from each side on the back
of the unit. Unit sections will now separate.
To reassemble:
1. Align cabinet sections together.
2. Reinstall screws.
3. Replace blower and coil assemblies.
4. Replace access panel.
UPFLOW APPLICATION
Use the following procedures to configure the unit for
upflow operations:
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WARNING
CBX32MV