Installation / Operation Instruction Manual
12
Venting continued-
Part I - Venting Specifications for:
48 Gallon (181.6 L)
65 Gallon (246.0 L)
This water heater is a power vented appliance and is designed to vent its
products of combustion through 3” (7.6 cm) or 4” (10.2 cm) diameter vent pipe
to the outdoors. This water heater may be either vented horizontally through the
wall or vertically through the roof. Use a 3” (7.6 cm) to 4” (10.2 cm) reducer to
connect to the vent outlet when using 4” (10.2 cm) vent pipe. Apply the proper
cement at the joint locations. Table 1 lists the maximum vent lengths for this
water heater using 3” (7.6 cm) vent pipe. If possible, locate the water heater so
that the venting length and number of elbows are kept to the minimum distance
necessary to reach the outside. If the installation requires venting lengths that
exceed the lengths listed for 3” (7.6 cm) vent pipe in Table 1, then use 4” (10.2
cm) vent pipe for the vent connector.
Table 2 lists the venting distances allowed with 4” (10.2 cm) diameter vent pipe.
When venting with 4” (10.2 cm) vent pipe, use a 4” (10.2 cm) to 3” (7.6 cm)
reducer to exit through the building wall with 3” (7.6 cm) vent pipe. Use the 3”
(7.6 cm) vent terminal supplied with the water heater to terminate on the
outside of the building. If the length of 3” (7.6 cm) vent pipe needed to go
through the wall is greater than 14” (35.5 cm), use 4” (10.2 cm) to go through
the wall and reduce to 3” (7.6 cm) vent pipe immediately after exiting the
outside wall. Refer to the venting illustrations on the following pages. Make sure
the vent pipe terminal elbow fitting is at least 1” (2.5 cm) away from the edge of
the wall.
TABLE 1 - VENT CONNECTOR LENGTHS
FOR 3” (7.6 cm) DIAMETER VENT PIPE
Terminating
# of Elbows
Maximum straight
Length ft (m)
Minimum
straight
Length
ft (m)
48, 65 gal.
Through the Wall
1
55 (16.8)
2 (.6)
Through the Wall
2
50 (15.2)
2 (.6)
Through the Wall
3
45 (13.7)
2 (.6)
Through the Wall
4
40 (12.2)
2 (.6)
Through the Roof
0
60 (18.3)
7 (2.1)
Through the Roof
1
55 (16.8)
7 (2.1)
Through the Roof
2
50 (15.2)
7 (2.1)
Through the Roof
3
45 (13.7)
7 (2.1)