036-21581-001 Rev. B (0904)
2
Unitary Products Group
.
Three elbows (two in vent pipe and one in the air intake pipe) are already accounted for and need not be included in the elbow count from the Table
above.
30-7/8
21-1/2
13-7/8
7
11
7/8
23-3/4
7/8
30-1/8
26-1/2
24-5/8
A
40
26-1/2
25-3/8
28-3/8
21-1/2
11
8
26-3/4
1-3/8
1-1/4
C
24-3/8
20
5/8
5/8
B
26-1/2
1-3/4
D
1-1/2” GAS
PIPE ENTRY
7/8” JUNCTION
BOX HOLE
T-STAT WIRING
7/8” K.O.
CONDENSAATE
DRAIN 7/8” K.O.
OPTIONAL RETURN AIR
CUT-OUT (either side)
FOR USE WITH
EXTERNAL FILTER
FRAME
LEFT SIDE
FRONT
RIGHT SIDE
BOTTOM IMAGE
RETURN END
TOP IMAGE
SUPPLY END
1-1/2” GAS
PIPE ENTRY
7/8” JUNCTION
BOX HOLE
T-STAT WIRING
7/8” K.O.
CONDENSAATE
DRAIN 7/8” K.O.
DIMENSIONS
BTUH
Input/Output
CFM
Cabinet
Size
Cabinet Dimension
A (in.)
B (in.)
C (in.)
D (in.)
PT9A12N040UP11
1200
A
14-1/2
13-1/4
12-1/8
6-1/4
PT9B12N060UP11
1200
B
17-1/2
16-1/4
15-1/8
8-1/2
PT9B12N080UP11
1200
B
17-1/2
16-1/4
15-1/8
8-1/2
PT9C16N080UP11
1600
C
21
19-3/4
18-1/2
8-7/8
PT9C16N100UP11
1600
C
21
19-3/4
18-1/2
8-7/8
PT9C20N100UP11
2000
C
21
19-3/4
18-1/2
8-7/8
PT9D20N120UP11
2000
D
24-1/2
23-1/4
21-7/8
10-5/8
COMBUSTION AIR SUPPLY AND VENT PIPING
MAXIMUM ELBOWS AND VENT LENGTHS
Models Input
BTUH
Pipe Size
Inches
Maximum Number of Elbows*
Minimum
Length
1 2 3 4 5 6 7 8
40,000
1-1/2
30
25
20
10
N/A
N/A
N/A
N/A
5
40,000
2
70
65
60
55
50
45
35
25
5
60,000
1-1/2
30 25 20 10 N/A
N/A
N/A
N/A
5
60,000
2
60 55 50 45 40 30 20 10
5
60,000
3
85 80 75 70 65 60 50 40
20
80,000
1-1/2
20 15 N/A N/A N/A N/A N/A N/A
5
80,000
2
60 55 50 45 40 30 20 10
5
80,000
3
85 80 75 70 65 60 50 40
20
100,000
2
25 20 15 N/A N/A N/A N/A N/A
5
100,000
3
85 80 75 70 65 60 50 40
20
120,000
3
75 70 65 60 55 45 35 25
5
