Side View - Lennox Elite CBX32M-024 Installation Instructions Manual

PROPERLY-SIZED
i
FLOOR OPENING,,_
COMBUSTIBLE FLOOR
ADDITIVE BASE
Figure 6. Combustible Flooring Additive Base
On combustible flooring, use an additive base as
illustrated in figure 6. and use the following procedures:
WARNING
IMPORTANT
Jh 11-3/8
_1- (289) --I_
1-5/8(41)
T:
oox32 !i
CB30M-21/26
20 (508)
CBX32M-41 to -65
CB3OM-3_ t_65
_ i{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{;i; .............
_1-1-5/8 (41)
SUPPLY
AIR
OPENING
l inches
(mm)
18-1/4(464)
CBX32M-21/26
and 31
CB30M-21/26
23-1/4 (591)
CBX32M-41 to -65
B30M-31 to 65
221/8 562 -,.i
5/8 (16) 1OPENING3-3/8 (340) _ 1_
i I JI
2(51)
SIDE VIEW _i,
Figure 7. Downflow Combustible Base Dimensions
Step 1.. Cut an appropriately sized opening for
combustible base as illustrated figure 7.
Step 2.. Set the additive base into opening.
Step 3.. Connect supply air plenum to the additive base.
Step 4.. Set the unit on the additive base so flanges of the
unit drop into the base opening and seal against
the insulation strips. The unit is now locked in
place.
Step 5_ Install retum air plenum and secure with sheet
metal screws.
If the homeowner reports water dripping from supply air
diffusers, check the shields and tape. Make sure the tape is
completely attached to the edges of the drip shield, and
that the drip shield is wedged firmly in place.
All coils are equipped with a factory-installed, internally
mounted check/expansion valve, which is suitable for use
in applications as follows:
• valve suitable for HCFC-22 use (CBX32M unit)
• valve suitable for HFC-410A use (CB30M unit)
The CBX32M/CB30M air handler's coil line sizes are listed
in table 2. Use Lennox L15 (sweat) series line sets (refer to
the outdoor unit Engineering Handbook for proper size,
type and application). For field-fabricated refrigerant lines,
see the piping section of the Lennox Unit Information
Service Manual.
SUCTION LINE
LIQUID LINE
AIR HANDLER UNIT
Figure 8. Brazing Connections
NOTE - CBX32M series evaporators use nitrogen or dry
air as a holding charge. If there is no pressure when the
rubber plugs are removed, check the coil or line set for
leaks before installing. After installation, pull a vacuum
on the line set and coil before releasing the unit charge
into the system.
Page 7
CBX32M SERIES