Allied Air 92G1DF Installation Instructions Manual page 11

COMBUSTIBLE FLOORING BASE OPENING SIZE
Cabinet Catalog
Width Number
B Cabinet
11M60
(17.5")
C Cabinet
11M61
(21")
FURNACE
PROPERLY
SIZED FLOOR
OPENING
FIGURE 13
2. After opening is cut, set the combustible flooring base
into opening.
3. Check fiberglass strips on the combustible flooring base
to make sure they are properly glued and positioned.
4. Lower supply air plenum into the combustible flooring
base until plenum flanges seal against fiberglass strips.
er opening is
NOTE: Be careful not to damage fiberglass 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 Coil Cabinet (Figure 14)
NOTE: Downflow combustible flooring kit is not used.
1. Refer to reverse-flow coil installation instructions for
correctly sized opening in floor and installation of
cabinet.
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.
506725-01
Front to Rear Side to Side
in. mm in.
22 559 18 − 3/4
22 559 22 − 3/4
TABLE 2
SUPPLY AIR
PLENUM
COMBUSTIBLE
FLOORING BASE
mm
476
578
PROPERLY
SIZED FLOOR
OPENING
Return Air Opening - Downflow Units
Return air may be brought in only through the top opening
of a furnace installed in the downflow position. The following
steps should be taken when installing plenum:
1. Bottom edge of plenum should be flanged with a
hemmed edge (See Figure 15 or 16).
2. Sealing strips should be used to ensure an airtight seal
between the cabinet and the plenum.
3. In all cases, plenum should be secured to top of furnace
using sheet metal screws.
4. Make certain that an adequate seal is made.
PLENUM
(Field Provided)
SEALING STRIP
(Field Provided)
PLENUM
(Field Provided)
SECURE FROM
INSIDE CABINET
Issue 1109
FURNACE
COOLING COIL
PLENUM
FIGURE 14
SECURE FROM
OUTSIDE CABINET
CABINET
SIDE PANEL
Side View
FIGURE 15
SEALING STRIP
(Field Provided)
CABINET
SIDE PANEL
Side View
FIGURE 16
Page 11 of 48