Installation / Operation Instruction Manual

15
Venting continued-
NOTE: For installations requiring both horizontal and vertical runs, the following
rule must be followed: Total length of straight pipe (both horizontally and
vertically) must NOT exceed the allowable length listed in the Table 3 and 4 for
total number of elbows used.
TABLE 3
2” (5.1 cm) Vent Pipe Lengths From Inside Wall For Low Ground
Clearance Installations
Terminating
# of Elbows
(excluding
vent
terminals)
Maximum
Straight
Length
ft (m)
Minimum
Straight
Length
ft (m)
(2) 90 Elbows with Vent Terminal
1
35 (10.6)
2 (.6)
(2) 90 Elbows with Vent Terminal
2
30 (9.2)
2 (.6)
(2) 90 Elbows with Vent Terminal
3
25 (7.6)
2 (.6)
(2) 90 Elbows with Vent Terminal
4
20 (6.1)
2 (.6)
TABLE 4
3” (7.6 cm) Vent Connector Lengths From Inside Wall For Low Ground
Clearance Installations
Terminating (Reduce 3” to 2”)
(Reduce 7.6 cm to 5.1 cm)
# of Elbows
(excluding
vent
terminals)
Maximum
Straight
Length
ft (m)
Minimum
Straight
Length
ft (m)
(2) 90 Elbows with Vent Terminal
1
105 (32.0)
10 (3.1)
(2) 90 Elbows with Vent Terminal
2
100 (30.5)
10 (3.1)
(2) 90 Elbows with Vent Terminal
3
95 (29.0)
10 (3.1)
(2) 90 Elbows with Vent Terminal
4
90 (27.4)
10 (3.1)
(2) 90 Elbows with Vent Terminal
5
85 (25.9)
10 (3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (762 m) ABOVE SEA LEVEL
The capacity of the induced draft blower declines with increasing altitude due to
a reduction in the air density. In order to assure safe and reliable performance
of the water heater, contact the supplier for high altitude kit.