66832-UIM-D-1205
18
Unitary Products Group
VENT PIPING ASSEMBLY
The final assembly procedure for the vent piping is as follows:
1.
Cut piping to the proper length beginning at the furnace.
2.
Deburr the piping inside and outside.
3.
Dry-fit the vent piping assembly from the furnace to the termination
checking for proper fit support and slope. Piping should be sup-
ported with pipe hangers to prevent sagging. The maximum spac-
ing between hangers is 4 feet (1.22 m).
4.
Assemble the vent piping from the furnace to the termination
securing the pipe connections with screws.
VENT CLEARANCES
IMPORTANT: The vent must be installed with the following minimum
clearances as shown in Figure 33, and must comply with local codes
and requirements.
FIGURE 29: Typical Sidewall Vent Application
FIGURE 30: Typical Sidewall Vent and Termination Configuration
FAN ASSISTED FURNACE
& WATER HEATER
FAN ASSISTED
FURNACES
VENT
PIPE
HOT
WATER
TANK
FURNACE
OPTIONAL
SIDEWALL
VENT SYSTEM
(field supplied)
EXTERIOR
VENT HOOD
VENT PIPE
FLUE
PIPE
BURNER
ACCESS
PANEL
CELLAR
WALL
OPTIONAL
SIDEWALL
VENT SYSTEM
(field supplied)
TOP
COVER
VENT
DAMPER
FIGURE 31: Typical Chimney Connections
FIGURE 32: Horizontal Air Inlet, Outlet and Chimney Connections
FURNACE
W
A
TER
HEA
TER
CHIMNEY OR
GAS VENT
OPENING
OPENING
FURNACE
W
A
TER
HEA
TER
OUTLET
AIR DUCT
INLET
AIR DUCT
TABLE 10: Horizontal Sidewall Venting Clearances
Horizontal Vent Length Ft. (m) with 4 Elbows
Heating
Heating
Heating
Heating
Furnace
Furnace
Pipe Size
Min. Vent Length
Max. Vent Length
Input
Input
Output
Output
Airflow
Airflow
Inches
cm
BTU/H
kW
BTU/H
kW
CFM
cm/m
Feet
meters
Feet
meters
40,000
11.72
32,000
9.38
1200
33.98
4
10.16
4.5
1.37
34.5
10.82
60,000
17.58
48,000
14.07
1200
33.98
4
10.16
4.5
1.37
34.5
10.82
80,000
23.44
64,000
18.76
1200
33.98
4
10.16
4.5
1.37
34.5
10.82
80,000
23.44
64,000
18.76
1600
45.31
4
10.16
4.5
1.37
34.5
10.82
100,000
29.31
80,000
23.45
1200
33.98
4
10.16
4.5
1.37
34.5
10.82
100,000
29.31
80,000
23.45
2000
56.63
4
10.16
4.5
1.37
34.5
10.82
115,000
33.70
92,000
26.96
1600
45.31
4
10.16
4.5
1.37
34.5
10.82
115,000
33.70
92,000
26.96
2000
56.63
4
10.16
4.5
1.37
34.5
10.82
130,000
38.10
104,000
30.48
2000
56.63
4
10.16
4.5
1.37
34.5
10.82
