Bradford White TW4-75S-76B-3N - Manual (Page 18)

18
Venting (Part I) continued-
TABLE 3
3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating # of
Elbows
Max Straight
Length ft (m) Min
straight
Length
ft (m)
48,65 gal.
(2) 90  Elbows with (1) 90 Elbow 1 40 (12.2) 5 (1.5)
(2) 90  Elbows with (1) 90 Elbow 2 35 (10.7) 5 (1.5)
(2) 90  Elbows with (1) 90 Elbow 3 30 (9.1) 5 (1.5)
(2) 90  Elbows with (1) 90 Elbow 4 25 (7.6) 5 (1.5)
TABLE 4
4” (10.2 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR
LOW GROUND CLEARANCE INSTALLATIONS
Terminating (Reduce 4” to 3”)
(Reduce 10.1 cm to 7.6 cm)
# of
Elbows
Max straight
Length ft (m) Min
straight
Length
ft (m)
48,65 gal.
(2) 90  Elbows with (1) 90 Elbow 1 160 (48.8) 10 (3.1)
(2) 90  Elbows with (1) 90 Elbow 2 155 (47.2) 10 (3.1)
(2) 90  Elbows with (1) 90 Elbow 3 150 (45.7) 10 (3.1)
(2) 90  Elbows with (1) 90 Elbow 4 145 (44.2) 10 (3.1)
(2) 90  Elbows with (1) 90 Elbow 5 140 (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.