TABLE 9

2” (5.1 cm) PVC VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR

LOW GROUND CLEARANCE INSTALLATIONS

Terminating

# of

Maximum

Minimum

 

Elbows

Length

Length

(2) 90° Elbows with Vent Terminal

0

35 ft (10.7

2 ft (.6 m)

 

 

m)

 

(2) 90° Elbows with Vent Terminal

1

30 ft (9.2 m)

2 ft (.6 m)

(2) 90° Elbows with Vent Terminal

2

25 ft (7.6 m)

2 ft (.6 m)

(2) 90° Elbows with Vent Terminal

3

20 ft (6.1 m)

3 ft (.9 m)

(2) 90° Elbows with Vent Terminal

4

15 ft (4.6 m)

4 ft (1.2 m)

TABLE 10

3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR LOW

GROUND CLEARANCE INSTALLATIONS

Terminating (Reduce 3” to 2”)

#of

Maximum

Minimum

(Reduce 7.6 cm to 5.1 cm)

Elbows

Length

Length

(2) 90° Elbows with Vent Terminal

0

90 ft (27.5 m)

10 ft (3.1 m)

(2) 90° Elbows with Vent Terminal

1

85 ft (25.9 m)

10 ft (3.1 m)

(2) 90° Elbows with Vent Terminal

2

80 ft (24.4 m)

10 ft (3.1 m)

(2) 90° Elbows with Vent Terminal

3

75 ft (22.9m)

10 ft (3.1 m)

(2) 90° Elbows with Vent Terminal

4

70 ft (21.4 m)

10 ft (3.1 m)

(2) 90° Elbows with Vent Terminal

5

65 ft (19.8 m)

12 ft (3.7 m)

HIGH ALTITUDE INSTAL LATIONS FOR ELEVATIONS OVER 2,000 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, the following guidelines must be followed. Refer to the venting tables below for maximum distances for the altitudes in your location.

TABLE 11 - HIGH ALTITUDE VENT CONNECTOR MODIFICATIONS

Altitude above sea

Maximum venting

Maximum venting

level

length reduction

length reduction from

 

from tables 7 & 9

tables 8 & 10

0 - 2,000 ft

No reduction in vent

No reduction in vent

(0 - 610 m)

length required

length required

over 2,000 - 5,000 ft

Reduce maximum vent

No reduction in vent

(over 610 - 1524 m)

length by 20 ft (6.1 m)

length required

over 5,000 - 8,000 ft

Use only 3” (7.6 cm)

No reduction in vent

(over 1524 - 2439 m)

PVC (Tables 8 & 10)

length required

over 8,000 - 10,000 ft

Use only 3” (7.6 cm)

Reduce maximum vent

(over 2439 - 2540 m)

PVC (Tables 8 & 10)

length by 20 ft (6.1 m)

23

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Image 23
Bradford-White Corp THROUGH-THE-WALL GAS WATER HEATER instruction manual Cm Vent Connector Lengths from Inside Wall for LOW