Table of Contents
Advertisement
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 CB30U series 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 CB30U units are designed for up−flow
operations with either bottom or side return air
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
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 clearances to
combustible materials as listed on the unit rating plate which
is located on the unit. Accessibility and service clearances
must
take
precedence
clearances.
over
combustible
material
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.
CB30U units come from the factory ready for up−flow,
bottom return installation. This unit is not designed for
down−flow or horizontal discharge. Return air for the
CB30U may be either from the bottom or sides of the unit.
Side
return
air
modifications.
Remove corrugated padding between the Blower
and coil assembly before operation on −41, −46, −51
and −65 units.
DISASSEMBLE/REASSEMBLE AIR HANDLER UNITS
The air handler units consists of two factory-assembled
sections. It may be necessary to disassemble the sections
when positioning the unit for installation.
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 APPLICATION
Use the following procedures to configure the unit for
up−flow operations:
Step 1.
Remove access panels and corrugated padding
between the blower and coil assembly before
operation.
Step 2.
Place unit in desired location. Set unit so that it
is level. Connect return and supply air plenums
as required using sheet metal screws.
Step 3.
Mount units that have no return air plenum on a
stand at least 14" from the floor for proper air
return. Lennox offers an optional up−flow unit
stand as listed in table 1.
Table 1. Optional Unit Side Stand (Up−Flow Only)
Model
−21, −26, and −31
−41 through −65.
Page 3
WARNING
adjustment,
applications
require
IMPORTANT
Kit Number
45K31
45K32
CB30U/CBX27UH SERIES
alteration,
some
field
Advertisement
Table of Contents
