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035-17405-000 Rev. B (0801)
All dimensions are in inches and are approximate.
FIGURE 2 : DOWNFLOW FURNACE DIMENSIONS
TABLE 4: RATINGS & PHYSICAL/ELECTRICAL DATA
DOWNFLOW MODELS
P*DN / G8T-DN / L8T-DN
O
N
U TPU T
OM
I
MBH
NPUT
MBH
CFM
40
32
1200
60
48
1200
80
64
1200
80
64
1600
100
80
1200
100
80
2000
115
92
1600
115
92
2000
130
104
2000
*.
AFUE numbers are determined in accordance with DOE test procedures.
†.
Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition)
•
For altitudes above 2,000 ft., reduce capacity 4% for each 1,000 ft. above sea level. Refer to Form 035-14446-000.
•
Wire size based on copper conductors, 60° C, 3% voltage drop.
•
Continuous return air temperature must not be below 55°F.
Unitary Products Group
C
A
T
A BINET
IR
EMP
*
AFUE
W
R
IDTH
ISE
"A" 14-1/2
80.0
20 - 50
"A" 14-1/2
80.0
25 - 55
"A" 14-1/2
80.0
35 - 65
"B"17-1/2
80.0
25 - 55
"B" 17-1/2
80.0
40 - 70
"C" 21
80.0
25 - 55
"C" 21
80.0
35 - 65
"C" 21
80.0
30 - 60
"D" 24-1/2
80.0
40 - 70
MODELS P*DN /
A
*
†
G8T-DN / L8T-DN
,
40 / 32 / 1200 / "A"
14-1/2
60 / 48 / 1200 / "A"
14-1/2
80 / 64 / 1200 / "B"
14-1/2
80 / 64 / 1600 / "B"
17-1/2
100 / 80 / 1200 / "B"
17-1/2
100 / 80 / 2000 / "C"
21
115 / 92 / 1600 / "C"
21
115 / 92 / 2000 / "C"
21
130 / 104 / 2000 / "C"
24-1/2
*.
Input / Output / CFM / Cabinet
†.
An "L" in the 1st or 8th position of the model number indicates a
LoNox unit.
B
LOWER
M
.
AX
O
UTLET
. ?F
T
EMP
HP
A
S
MPS
IZE
150
1/3
6.2
10 x 8
155
1/3
6.2
10 x 8
165
1/3
6.2
10 x 8
160
3/4
11.0
11 x 10
170
1/2
7.0
10 x 8
155
1
12.2
11 x 10
165
3/4
11.0
11 x 10
160
1
12.2
11 x 10
170
1
12.2
11 x 10
B
C
D
13-1/4
12-1/4
4
10-1/8
13-1/4
12-1/4
4
10-1/8
13-1/4
12-1/4
4
10-1/8
16-1/4
15-1/4
4
11-5/8
16-1/4
15-1/4
4
11-5/8
19-3/4
18-3/4
4
13-3/8
19-3/4
18-3/4
4
13-3/8
19-3/4
18-3/4
4
13-3/8
23-1/4
22-1/4
4
15-1/8
M
. W
IN
M
.O
T
AX
VER
OTAL
S
(AWG)
IZ E
-C
U
URRENT
NIT
@ 75 F
ROTEC T †
A
MPS
P
O
W
NE
9.0
20
14
9.0
20
14
9.0
20
14
12.0
20
14
12.0
20
14
14.0
20
12
12.0
20
14
14.0
20
12
14.0
20
12
E
F
3-3/4
3-3/4
3-3/4
3-3/4
3-3/4
3-3/4
3-3/4
3-3/4
3-3/4
IRE
O
. W
.
PER
GT
.
(L
)
T
B S
†
AY
100
110
120
130
125
140
150
150
160
7
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