Bradford White TW4-75S-76B-3N - Manual (Page 24)

24
Venting (Part II) continued-
TABLE 7
2” (5.1 cm) VENT PIPE LENGTHS FROM INSIDE WALL FOR LOW
GROUND CLEARANCE INSTALLATIONS
Terminating # of
Elbows
Max straight
Length ft (m) Min straight
Length ft (m)
(2) 90  Elbows with Vent Terminal 1 30 (9.1) 2 (.6)
(2) 90  Elbows with Vent Terminal 2 25 (7.6) 2 (.6)
(2) 90  Elbows with Vent Terminal 3 20 (6.1) 2 (.6)
(2) 90  Elbows with Vent Terminal 4 15 (4.6) 2 (.6)
TABLE 8
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
Maximum
Length ft (m)
Minimum
Length ft (m)
(2) 90  Elbows with Vent Terminal 1 100 (30.5) 10 (3.1)
(2) 90  Elbows with Vent Terminal 2 95 (29.0) 10 (3.1)
(2) 90  Elbows with Vent Terminal 3 90 (27.4) 10 (3.1)
(2) 90  Elbows with Vent Terminal 4 85 (25.9) 10 (3.1)
(2) 90  Elbows with Vent Terminal 5 80 (24.4) 10 (3.1)
HIGH ALTITUDE INSTALLATIONS FOR ELEVATIONS OVER 2,500
FEET (610 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.