Figure 9
115V, 60Hz
I
NEUT.
Electrical Connections
Connection
_round
Thermostat
,@
I I i
1 i,
Low Voltage
Terminal Board 25-21-05a
7. DuctworkandFilter
Subbase for Combustible Floors - Furnace Only
The Subbase for Combustible Floors MUST be used when a
downflow furnace is set on combustible material even when the
furnace is installed on a coil box.
NOTE: Supply opening is 37/8" from the rear of the furnace.
Therefore maintain a 37/8', clearance from wall (where applica-
ble).
since the base is equipped with locating tabs that center the
base over the opening.
The opening in the base is 11/4"(32mm) shorter and 11/8"(29mm)
narrower than the recommended size of the opening in the floor.
This is done to maintain a 1" clearance between the floor and the
plenum.
1. Cut the opening in the floor according to Table 6. The hole
in the floor must be cut to the dimensions listed in Table 6
2. Fabricate the plenum to the dimensions given in Table 6.
Note that the dimensions given are outside dimensions.
Table 6 Subbases for Combustible Floors Dimensions
Subbase for Com-
bustible Floors Part
Number
(Furnace Only)
NAHH001SB
NAHH002SB
NAHH003SB
Subbase for
Coil Box
NAHH004SB
NAHH005SB
NAHH006SB
H 1
1511/16
195/16
2215/16
1511/16
195/16
2215/16
Subbase for Combustible
Floor Dimensions
j1 K2
283/4 149/16
283/4 183/16
283/4 2t13/16
209/16 149/16
209/16 183/16
209/16 2t13/16
L
16
16
16
16
16
16
Opening In Floor
M N
161/4 145/8
161/4 181/4
161/4 217/8
161/4 145/8
161/4 181/4
161/4 217/8
Opening In
Base For Plenum
P R
15 131/2
15 171/8
15 193/4
15 131/2
15 171/8
15 193/4
Typical Plenum Di-
mensions
S T
t5 131/2
t5 171/8
t5 193/4
t5 131/2
t5 171/8
t5 193/4
Equivalents 1511/16= 398
in mm 195116=491
2215116= 583
Outside Dimension
283/4=730
209/16=
522
14_16=370
18916=462
211916 = 554
16=406 161/4=412
14_8= 37t
181/4=464
21718= 556
15= 381
13112=343 1
17118= 435
19314= 502
t5 =381
I 13112=343
17118=435
19314=502
2 Base Spacer Side To Side
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