Installation / Operation Instruction Manual

14
Venting continued-
TABLE 3
3 in (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating
# of
Elbows
(excl.
vent
term.)
Maximum Straight
Length ft (m)
Minimum
Straight
Length
ft (m)
48, 65
gal.
25, 55
and 75
gal.
(2) 90 Elbows with (1) 90 Elbow
1
40 (12.2)
30 (9.1)
5 (1.5)
(2) 90 Elbows with (1) 90 Elbow
2
35 (10.7)
25 (7.6)
5 (1.5)
(2) 90 Elbows with (1) 90 Elbow
3
30 (9.1)
20 (6.1)
5 (1.5)
(2) 90 Elbows with (1) 90 Elbow
4
25 (7.6)
15 (4.6)
5 (1.5)
TABLE 4
4 in (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating
(Reduce 4 in to 3 in)
(Reduce 10.1 cm to 7.6 cm)
# of
Elbows
(excl.
vent
term.)
Maximum Straight
Length ft (m)
Minimum
Straight
Length
ft (m)
48, 65
gal.
25, 55
and 75
gal.
(2) 90 Elbows with (1) 90 Elbow
1
160
(48.8)
160
(48.8)
10 (3.1)
(2) 90 Elbows with (1) 90 Elbow
2
155
(47.2)
155
(47.2)
10 (3.1)
(2) 90 Elbows with (1) 90 Elbow
3
150
(45.7)
150
(45.7)
10 (3.1)
(2) 90 Elbows with (1) 90 Elbow
4
145
(44.2)
145
(44.2)
10 (3.1)
(2) 90 Elbows with (1) 90 Elbow
5
140
(42.7)
140
(42.7)
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.
Vent Pipe Preparation and Joining
Most failures in vent systems result from improper preparation and joining of
pipe and fittings. The guidelines below must be followed when installing the
venting system. If you have any question about the application or installation of
the venting system, contact the vent pipe manufacturer, supplier, or your
plumbing professional.