Figure 38, Furnace subbase – Sears 9MPD125L20B1 User Manual
Page 37
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Table 11
Subbases for Combustible Floors Dimensions
Subbase for Combustible
Floors Part Number
Subbase for Combustible
Floor Dimensions
Opening In Floor
Opening In Base
For Plenum
Typical Plenum
Dimensions
H*
J*
K"
L
M
N
P
R
S
T
Furnace Subbase
NAHH001SB
I
5
IV
16
28
V
4
14% 6
16
I
6
V
4
14Vg
15
I
3
I
/2
15
I
3
I
/2
NAHH002SB
19 Vi 6
28
V
4
18 Vi 6
16
161/4
I
8
V
4
15
171/3
15
171/3
NAHH003SB
22
V
16
21'Vi6
16
21 Vs
15
WÜ
15
I
9
V
4
NAHH010SB
24^7^
WTn
23% 6
WÜ
23Vg
15
221/2
15
22
V
2
Subbase for Coil Cabinets
NAHH004SB
15'Vis
20
V
16
14% 6
WÜ
14Vg
15
WT2
15
WT2
NAHH005SB
19 Vi 6
20
V
16
18% 6
161/4
161/4
П8ПП^
15
171/3
15
171/3
NAHH006SB
23
20
V
16
21'% 6
161/4
161/4
21'/g
15
19
V
4
15
19
V
4
NAHH009SB
24''-'/i6
20
V
16
16
23Vg
15
22
V
2
15
221/2
* Outside Dimension
“ Base Spacer Side To Side
3.
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 38, Figure 39 and Figure 40.
4.
Drop the plenum through the opening in the base. The
flange of the plenum should rest on top of the subbase.
5.
Position furnace or coil cabinet and furnace on subbase so it
aligns between the locating tabs.
Figure 38
Furnace Subbase
25-20-46
Figure 39
Coil Cabient Subbase
25-20-46b
A = 4 1 /4" Minimum clearance from back of hole to wall or other obstruction,
Figure 40
Setting the Subbase
Wood Floor
Wood Sere'
Plenum
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 41.
440
01 1020 04
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