Payne C Series Installation, Start-Up, Operating, Service And Maintenance Instructions page 14

A
PLENUM
OPENING
B
C
Fig. 11—Floor and Plenum Opening Dimensions
→
Fig. 13—Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor
Downflow Furnaces
Connect supply-air duct to supply-air outlet on furnace. Bend
flange inward past 90° with wide duct pliers. (See Fig. 14.) The
supply-air duct must be connected to ONLY the furnace supply-
outlet or air conditioning coil casing (when used). When installed
on combustible material, supply-air duct must be connected to
ONLY the accessory subbase, KGASB0201ALL, or factory ap-
D
FLOOR
OPENING
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Fig. 12—Furnace, Plenum, and Subbase Installed on
FURNACE
CD5 OR CK5
COIL ASSEMBLY
OR KCAKC
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
A04140
proved air conditioning coil casing. DO NOT cut main furnace
casing to attach supply side air duct, humidifier, or other accesso-
ries. All accessories MUST be connected external to furnace
casing.
13
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
a Combustible Floor
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