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WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of
California to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
General Information
The CB31MV air handler units are designed for installation
with optional field−installed electric heat and a matched
remote outdoor unit. These units are for indoor installation
only. The units are designed for multi−positional
installations and are shipped (completely assembled) from
the factory for installation in up−flow or horizontal
right−hand air discharge applications.
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.
Shipping and Packing List
Package 1 of 1 contains the following:
1 Assembled air handler unit
2 Drip shields (for down−flow application only)
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
505341M 04/08
This unit is approved for installation clearance to
combustible material as stated on the unit rating plate.
Accessibility
and
precedence over combustible material clearances.
Installing the Unit
Improper
installation,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and
service must be performed by a qualified installer or
service agency.
CB31MV units are factory−configured for installation in
up−flow or horizontal right−hand air discharge applications.
The units must be field−modified for installation in either
down−flow
or
applications.
DISASSEMBLE AND REASSEMBLE AIR HANDLER
UNIT
The CB31MV air handler 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:
Step 1.
Remove access panels.
Step 2.
Remove both blower and coil assemblies. This
will lighten the cabinet for lifting.
Step 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:
Step 1.
Align cabinet sections together.
Step 2.
Reinstall screws.
Step 3.
Replace blower and coil assemblies.
Step 4.
Replace access panel.
UP−FLOW AIR DISCHARGE APPLICATION
Use the following procedures to configure the unit for
up−flow operations:
Step 1.
Remove access panels.
Step 2.
Remove corrugated padding from the space
between the blower and coil assemblies.
Step 3.
Discard drip shields which are shipped inside
corner post packaging. The shields are used in
down−flow applications only.
Step 4.
The horizontal drain pan must be removed when
the coil blower is installed in the up−flow position.
Removing horizontal drain pain will allow proper
airflow and increase efficiency.
Page 4
service
clearances
WARNING
adjustment,
horizontal
left−hand
air
must
take
alteration,
discharge
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