Roll- -Out Protection; Side Return Air Inlet - Bryant 120/C Series Installation, Start-Up, Operating And Service And Maintenance Instructions

not pull away from the furnace sides, so that the strap attachment
screws are not in tension (are loaded in shear) for reliable support.
Platform Furnace Support
Construct working platform at location where all required furnace
clearances are met. (See Fig. 2 and 17.) For furnaces with 1- -in.
clearance requirement on side, set furnace on non- -combustible
blocks, bricks or angle iron. For crawlspace installations, if the
furnace is not suspended from the floor joists, the ground
underneath furnace must be level and the furnace set on blocks or
bricks.

Roll- -Out Protection

Provide a minimum 17- -3/4 in. X 22 in. piece of sheet metal for
flame roll- -out protection in front of burner area for furnaces
closer than 12 inches above the combustible deck or suspended
furnaces closer than 12 inches to joists. The sheet metal MUST
extend underneath the furnace casing by 1 in. with the door
removed.
The bottom closure panel on furnaces of widths 17- -1/2 in. and
larger may be used for flame roll- -out protection when bottom of
furnace is used for return air connection. See Fig. 17 for proper
orientation of roll- -out shield.
Bottom Return Air Inlet
These furnaces are shipped with bottom closure panel installed in
bottom return- -air opening. Remove and discard this panel when
bottom return air is used. To remove bottom closure panel,
perform the following:
1. Tilt or raise furnace and remove two screws holding
bottom filler panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding
tabs.
3. Remove bottom closure panel.
4. Reinstall bottom filler panel and screws.

Side Return Air Inlet

These furnaces are shipped with bottom closure panel installed in
bottom return- -air opening. This panel MUST be in place when
side return air inlet(s) are used without a bottom return air inlet.
A
PLENUM
OPENING
B
OPENING
C
Fig. 11 - - Floor and Plenum Opening Dimensions
D
FLOOR
A96283
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
Fig. 12 - - Furnace, Plenum, and Subbase Installed on a Com-
bustible Floor
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
Fig. 13 - - Furnace, Plenum, and Coil Assembly or Coil Box
Installed on a Combustible Floor
Not all horizontal furnaces are approved for side return air
connections (See Fig. 20.)
12
A96285
A04140
A04140