Roll-Out Protection; Bottom Return Air Inlet - Carrier 58CVA Installation, Start-Up, Operating And Service And Maintenance Instructions

A
PLENUM
OPENING
B
FLOOR
OPENING
C
Fig. 11—Floor and Plenum Opening Dimensions
clearance requirement on side, set unit on non-combustible blocks,
bricks or angle iron. For crawlspace installations, if the unit is not
suspended from the floor joists, the ground underneath unit must
be level and the unit set on blocks or bricks.

ROLL-OUT PROTECTION

Provide a minimum 17 3/4" X 22" piece of sheet metal for roll-out
protection in front of burner area for units closer than 12 inches
above the combustible deck or suspended units closer than 12-in.
to joists. The sheet metal MUST extend underneath the furnace
casing by 1 in. with the door removed.
D
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Fig. 13—Furnace, Plenum, and Coil Assembly or Coil
Box Installed on a Combustible Floor
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
The bottom closure pan on furnaces of widths 17 1/2 in. and larger
may be used for roll-out protection when bottom of furnace is used
for return air connection. See Fig. 17 for proper orientation of
roll-out shield.
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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 2 screws holding bottom filler
panel. (See Fig. 9.)
2. Rotate bottom filler panel downward to release holding tabs.
10
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
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