Armstrong Air Conditioning A96DS2V - Page 10

507405-05Page 10 of 72 Issue 1621
Installation on Non-Combustible Flooring
1. Cut oor opening keeping in mind clearances listed
on unit rating plate. Also keep in mind gas supply
connections, electrical supply, flue and air intake
connections and sufcient installation and servicing
clearances. See Table 1 for correct oor opening 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.
Installation on Combustible Flooring
1. When unit is installed on a combustible oor, a downow
combustible ooring base must be installed between
the furnace and the oor. The base must be ordered
separately. See Table 2 for opening size to cut in oor.
The unit may be installed three ways in downflow
applications: on non-combustible ooring, on combustible
ooring using an additive base, or on a reverse-ow cooling
coil cabinet. Do not drag the unit across the oor in the
downow position. Floor and furnace ange damage
will result.
Refer to Figure
13 for clearances in downow applications.
Figure 13
Downow Application Installation Clearances
CAUTION
The furnace and combustible ooring base shall not be
installed directly on carpeting, tile, or other combustible
material other than wood ooring.
Table 1
Non-Combustible Floor Opening Size
Figure 14
WARNING
Improper installation of the furnace can result in
personal injury or death. Combustion and ue products
must never be allowed to enter the return air system
or air in the living space. Use sheet metal screws and
joint tape to seal return air system to furnace.
In platform installations with furnace return, the furnace
should be sealed airtight to the return air plenum. A
door must never be used as a portion of the return air
duct system. The base must provide a stable support
and an airtight seal to the furnace. Allow absolutely no
sagging, cracks, gaps, etc.
For no reason should return and supply air duct systems
ever be connected to or from other heating devices such
as a replace or stove, etc. Fire, explosion, carbon
monoxide poisoning, personal injury and/or property
damage could result.
Cabinet Width
Front to Rear Side to Side
in. mm in. mm
B Cabinet (17.5”)
19-3/4 502 16-5/8 422
C Cabinet (21”) 19-3/4 502 16-5/8 422
NOTE: Floor opening dimensions listed are 1/4 inch (6mm) larger than
the unit opening. See dimension drawing on page 2