Coleman PxXU-V series Installation Instructions Manual page 9

035-17468-001 Rev. A (801)
Horizontal Installations
For installation of an air conditioning coil in a horizontal appli-
cation, the perforations in the wrapper flanges must be bent
away from the heat exchanger to create duct flanges so the
air conditioning coil can be properly seated on the furnace.
Refer to the installation instructions supplied with the air con-
ditioning coil for additional information and completion of the
coil installation.
NOTE: Duct pliers or other suitable tool can be used to bend
perforations. To help bend flanges in a straight line, scribe a
line between the perforations prior to bending.
DOWNFLOW APPLICATION
DOWNFLOW FILTERS
A top return filter rack is supplied with
the furnace. Two 14" x 20" permanent
washable filters are supplied with each
unit.
Downflow
installed with the filters located above
the furnace, extending into the return
air duct. See Figure 6.
Any branch duct must attach to the ver-
tical ductwork above the filter height
(FH).
The filter rack (provided) should be secured to the center of
the front and rear flanges at the furnace top. Drill a hole
through the front and rear duct flange into the filter rack and
secure it with a sheet metal screw.
Refer to the unit rating plate for furnace model then see the
dimensions page of this instruction for return air plenum
dimensions. Install the plenum following instructions under
Ductwork in this instruction
SUPPLY AIR DUCTS
Installations on combustible material or floors must use a
combustible floor base (shown in Figure 7 - 1CB0317 or
1CB0324) as specified on the rating plate or a matching cool-
ing coil. Follow the instructions supplied with the combustible
floor base accessory.
This base can be replaced with a matching cooling coil, prop-
erly sealed to prevent leaks. Follow the cooling coil instruc-
tions for installing the plenum.
All downflow application supply duct systems must be
designed and installed in accordance with the standards of
NFPA 90A and 90B, and/or all local codes.
Unitary Products Group
furnaces typically are
FILTER RACK
(FACTORY SUPPLIED)
A
RACK AND FILTERS SECURED
INSIDE BLOWER SECTION
FOR SHIPMENT
A
NOTE: FILTER ACCESS THRU DUCT-
WORK MUST BE PROVIDED FOR
REMOVAL AND CLEANING
FILTERS
FILTER
DUCTWORK
RACK
CROSS SECTION A-A
(WITH PLENUM AND FILTERS)
FIGURE 6 : DOWNFLOW FILTERS
FIGURE 7 : Combustible Floor Base Accessory
CASING SIZE DIMENSION FH
16-1/4 12-3/4
22-1/4 11
26-1/4 8-1/4
BRANCH
DUCTS
FH
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