Bryant 310AAV User Manual page 11

A
PLENUM
OPENING
B
FLOOR
OPENING
C
Fig. 11—Floor and Plenum Opening Dimensions
Fig. 13—Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor
When a furnace is installed so that the supply ducts carry air to
areas outside the space containing the furnace, the return air must
also be handled by a duct(s) sealed to the furnace casing and
terminating outside the space containing the furnace.
Secure ductwork with proper fasteners for type of ductwork used.
Seal supply- and return-duct connections to furnace with code
approved tape or duct sealer.
D
A96283
CD5 OR CK5
COIL ASSEMBLY
COMBUSTIBLE
SHEET METAL
Fig. 12—Furnace, Plenum, and Subbase Installed on
FURNACE
OR KCAKC
COIL BOX
FLOORING
PLENUM
FLOOR
OPENING
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Flexible connections should be used between ductwork and
furnace to prevent transmission of vibration. Ductwork passing
through unconditioned space should be insulated and sealed to
enhance system performance. When air conditioning is used, a
vapor barrier is recommended.
Maintain a 1-in. clearance from combustible materials to supply air
ductwork for a distance of 36 in. horizontally from the furnace. See
NFPA 90B or local code for further requirements.
10
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
a Combustible Floor
A96285