Armstrong Air Conditioning A96DS2V - Page 11

507405-05 Page 11 of 72Issue 1621
2. After opening is cut, set the combustible ooring base
into opening.
3. Check berglass strips on the combustible ooring base
to make sure they are properly glued and positioned.
4. Lower supply air plenum into the combustible ooring
base until plenum anges seal against berglass strips.
er opening is
NOTE: Be careful not to damage berglass 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
NOTE: Downow combustible ooring kit is not used.
1. Refer to reverse-ow 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.
Return Air Opening - Downow Units
Return air may be brought in only through the top opening of
a furnace installed in the downow position. The following
steps should be taken when installing plenum:
1. Bottom edge of plenum should be flanged with a
hemmed edge (See Figure 17 or 18).
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.
Figure 16
Figure 17
Figure 18
Combustible Flooring Base Opening Size
Table 2
Figure 15
Cabinet
Width
CAT
Number
Front to
Rear
Side to Side
in. mm in. mm
B Cabinet
(17.5”)
11M60 22 559 18-3/4 467
C Cabinet
(21”)
11M61 22 559 22-3/4 578