Carrier 140/E Series Installation, Start--Up, Operating, And Service And Maintenance page 12

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.
(25 ram) 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 n_ininmm 17-3/4-in. x 22-in. (451 x 559 ram) piece of
sheet metal for flame roll-out protection in front of burner area
for furnaces closer than 12 inches (305 ram) above the
combustible deck or suspended furnaces closer than 12 inches
(305 ram) to joists. The sheet metal MUST extend underneath the
furnace casing by 1 in. (25 ram) with the door removed.
The bottom closure panel on furnaces of widths 17-1/2 in. (445
ram) 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 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,
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
A96285
Fig. 12 - Furnace, Plenum, and Subbase installed on a
Combustible Floor
FURNACE
APPROVED
COIL ASSEMBLY
OR
COIL BOX
_ COMBUSTIBLE
FLOORING "_
SHEET METAL _
PLENUM
FLOOR
OPENING
/
Fig. 11 - Floor and Plenum Opening Dimensions
A96283
A08556
Fig. 13 - Furnace, Plenum, and Coil Assembly or Coil Box
Installed on a Combustible Floor
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