Page 8
Downow Installation
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Installation on Non-Combustible Flooring (Figure 6)
1 -
on unit rating plate. Also keep in mind gas supply
size.
2 - Flange warm air plenum and lower the plenum into
the opening.
3 - Set the unit over the plenum and seal the plenum to
the unit.
4 - Ensure that the seal is adequate.
SUPPLY AIR
PLENUM
OPENING
Figure 6
TABLE 1
NON-COMBUSTIBLE FLOOR OPENING SIZE
Cabinet
Width
Front to Rear Side to Side
in mm in mm
A (14.5”)
19-3/4 502
13-1/4 337
B (17.5”) 16-3/4 413
C (21”) 19-3/4 502
NOTE - Floor opening dimensions listed are 1/4 inch (6
mm) larger than the unit opening. See unit dimensions on
page 2.
Installation on Combustible Flooring (Figure 7)
1 -
base must be ordered separately.
See table 2 for opening size to cut in oor.
CAUTION
shall not be installed directly on carpeting, tile, or other
SUPPLY AIR PLENUM
DOWNFLOW
COMBUSTIBLE
FLOORING BASE
PROPERLY
SIZED FLOOR
OPENING
Figure 7
TABLE 2
COMBUSTIBLE FLOOR OPENING SIZE
Cabinet
Width
Front to Rear Side to Side
in mm in mm
A (14.5”)
22 569
15-3/4 400
B (17.5”) 18-3/4 476
C (21”) 22-3/4
578
into opening.
make sure they are properly glued and positioned.
strips.
NOTE - Be careful not to damage sealing strips.
Check for a tight seal.
5 - Set the furnace over the plenum.
6 - Ensure that the seal between the furnace and plenum
is adequate.
Installation on Cooling Cabinet (Figure 8)
1 -
of cabinet.
NOTE - Downow combustible ooring kit is not
used
2 - When cooling cabinet is in place, set and secure
the furnace according to the instructions that are
provided with the cooling coil. Secure the furnace to
the cabinet.
3 - Seal the cabinet and check for air leaks.
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