Bryant 120 Roll-OutProtection, Floor and Plenum Opening Dimensions, Combustible Floor, 312A

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
312A	bottom return air is used. To remove bottom closure panel,
	perform the following:
	1.	Tilt or raise furnace and remove 2 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	D
	FLOOR
	OPENING
	C

A096283

Fig. 11 - Floor and Plenum Opening Dimensions

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE

FLOORING

DOWNFLOW

SUBBASE

SHEET METAL

PLENUM

FLOOR

OPENING

A096285

Fig. 12 - Furnace, Plenum, and Subbase installed on a

Combustible Floor

FURNACE

CD5 OR CK5

COIL ASSEMBLY

OR KCAKC

COIL BOX

COMBUSTIBLE

FLOORING

SHEET METAL

PLENUM

FLOOR

OPENING

A04140

A04140

Fig. 13 - Furnace, Plenum, and Coil Assembly or Coil Box

Installed on a Combustible Floor

12