Table of Contents
Advertisement
IMPORTANT: The minimum plenum height is 12" (30.5 cm). The fur-
nace will not operate properly on a shorter plenum height. The mini-
mum recommended rectangular duct height is 4 inches (10 cm)
attached to the plenum.
IMPORTANT: The air temperature rise should be taken only after the
furnace has been operating for at least 15 minutes. Temperatures and
external static pressures should be taken 6" (15 cm) past the first bend
from the furnace in the supply duct and the return duct. If an external fil-
ter box or an electronic air cleaner is installed, take the return air read-
ings before the filter box or air cleaner.
If a matching cooling coil is used, it may be placed directly on the fur-
nace outlet and sealed to prevent leakage. Follow the coil instructions
for installing the supply plenum. On all installations without a coil, a
removable access panel is recommended in the outlet duct such that
smoke or reflected light would be observable inside the casing to indi-
cate the presence of leaks in the heat exchanger. This access cover
shall be attached in such a manner as to prevent leaks.
B
A
FRONT
FIGURE 1: Dimensions
TABLE 4: Cabinet and Duct Dimensions
BTUH (kW)
CFM (m
Input/Output
40/32 (11.7/9.4)
1200 (34.0)
60/48 (17.6/14.1)
1200 (34.0)
80/64 (23.4/18.8)
1200 (34.0)
80/64 (23.4/18.8)
1600 (45.3)
80/64 (23.4/18.8)
1600 (45.3)
2000 (56.6)
80/64 (23.4/18.8)
2200 (62.3)
100/80 (29.3/23.4)
1200 (34.0)
100/80 (29.3/23.4)
1600 (45.3)
100/80 (29.3/23.4)
1600 (45.3)
100/80 (29.3/23.4)
2000 (56.6)
115/92 (33.7/27.0)
1600 (45.3)
115/92 (33.7/27.0)
2000 (56.6)
130/104 (38.1/30.5)
2000 (56.6)
Unitary Products Group
20
3/4
GAS INLET
40
1-1/4 x 2-1/2
28-1/2
LEFT SIDE
26-1/2
BOTTOM IMAGE
RETURN END
Cabinet
3
/min)
Size
A
A
14 1/2
A
14 1/2
A
14 1/2
B
17 1/2
C
2
C
21
B
17 1/2
B
17 1/2
C
21
C
21
C
21
C
21
D
24 1/2
The supply air temperature MUST NEVER exceed the Maximum
Supply Air Temperature, specified on the nameplate.
Operating the furnace above the maximum supply air temperature
will cause the heat exchanger to overheat, causing premature heat
exchanger failure. Improper duct sizing, dirty air filters, incorrect
manifold pressure, incorrect gas orifice and/or a faulty limit switch
can cause the furnace to operate above the maximum supply air
temperature. Refer to sections II, III and IX for additional informa-
tion on correcting the problem.
4" Diameter
(VENT CONNECTIONS)
POWER WIRING
7/8" HOLE
13-3/4
2-1/2
32-1/2
ACCESS
WIRING
7/8" K.O.
16
8-3/4
T'STAT WIRING 7/8" K.O.
1-3/8
20
1-1/4
D
C
24-3/4
4" Diameter
TOP IMAGE
SUPPLY END
Cabinet Dimension
A (cm)
B
B (cm)
36.8
13 1/4
33.6
36.8
13 1/4
33.6
36.8
13 1/4
33.6
44.4
16 1/4
41.3
53.3
19 3/4
50.2
53.3
19 3/4
50.2
44.4
16 1/4
41.3
44.4
16 1/4
41.3
53.3
19 3/4
50.2
53.3
19 3/4
50.2
53.3
19 3/4
50.2
53.3
19 3/4
50.2
62.2
23 1/4
59.1
166753-UIM-C-0706
14-3/4
5-3/8
2
14
23-1/2
2-1/4
1-1/8
RIGHT SIDE
5/8
5/8
B
C
C (cm)
D
11 1/2
29.1
10 1/8
11 1/2
29.1
10 1/8
11 1/2
29.1
10 1/8
14 3/8
36.5
11 5/8
17 3/4
45.1
13 3/8
17 3/4
45.1
13 3/8
14 3/8
36.5
11 5/8
14 3/8
36.5
11 5/8
17 3/4
45.1
13 3/8
17 3/4
45.1
13 3/8
17 3/4
45.1
13 3/8
17 3/4
45.1
13 3/8
21 3/8
54.3
15 1/8
D (cm)
25.7
25.7
25.7
29.5
34.0
34.0
29.5
29.5
34
34
34
34
27.6
5
Advertisement
Table of Contents
