Bradford White TW4-75S-76B-3X - Manual (Page 16)

16
Venting (Part I) continued-
TABLE 3
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Max Straight
Length ft (m) Terminating # of
Elbows
48,65
gal.
75 gal.
Min
straight
Length
ft (m)
(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” (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Max straight
Length ft (m) Terminating (Reduce 4” to 3”)
(Reduce 10.1 cm to 7.6 cm)
# of
Elbows
48,65
gal.
75 gal.
Min
straight
Length
ft (m)
(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.