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ubbases,orCombus.bleF,oorsD,mens,ons
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Subbase for Combustible
Floors Part Number
Furnace Subbase
NAHHOOISB
NAHHOO2SB
NAHHOO3SB
NAHHOIOSB
Subbase for Coil Cabinets
NAHHOO4SB
NAHHOO5SB
NAHHOO6SB
NAHHOO9SB
Outside Dimension
_ Base Spacer Side To Side
3.
4,
5.
Subbase for Combustible
Floor Dimensions
H*
1511/16
195/16
225/16
24J/4
15]]/16
195/16
23
24]]/16
J_ K**
283/4 149/16 16
283/4 183/16 16
283/4 2113/16 16
28J/4 23u/16 16]/4
20u/16 14u/16 16]/4
209/16 183/16 161/4
209/16 2113/16 161/4
20u/16 23u/16 16
Set the base over the opening in the floor, centering it over
the opening. Fasten the base to the floor with screws or
nails. See Figure 37, Figure 38 and Figure 39.
Opening In Floor
M N
161/4 145/8
16114 18114
161/4 21 t/8
161/4 23b/8
161/4 145/8
161/4 181/4
161/4 21 t/8
161/4 23_/8
Opening In Base
For Plenum
P R
15 131/2
15 171/8
15 193/4
15 221/2
15 13]/2
15 171/8
15 193/4
15 22]/2
Coil Cabinet Subbase
Furnace Subbase
s
Plenum
Combustible
Floor Base
25-20-46
A - 41/4" Minimum clearance from back of hole
to wall or other obstruction.
Drop the plenum through the opening in the base. The
Plenum
Typical Plenum
Dimensions
flange of the plenum should rest on top of the subbase.
Position furnace or coil cabinet and furnace on subbase so
it aligns between the locating tabs.
S T
15 131/2
15 171/8
15 193/4
15 221/2
15 131/2
15 171/8
15 193/4
15 221/2
Combustible
FloorBase
/
i
Wood c o;
This subbase for combustible floors has been designed so that
the height of the subbase raises the downflow coil off the floor to
allow easy installation of the condensate drain. See Figure 40.
44001 111400 [_