Bradford White RTG 199 MEN, Инструкция по установке и эксплуатации

Страница: 14 / 56

Installation instructions
RTG 199 ME – 6 720 811 615 (2015/04) 14
Calculation example for 3" venting:
Exhaust
Combustion air
Calculation example for 4" venting:
Exhaust
Combustion air
System used Concentric
Number of 90° elbows needed: 1
Number of 45° elbows needed: 2
Table 11
Calculation of example
Max. length 28.5’
90° elbow reduction - 5’
sub-total = 23.5’
45° elbow reduction - 5’
Total = 18.5’
Table 12
For this example, the maximum allowable exhaust pipe
length is
18.5 feet .
System used Concentric
Number of 90° elbows needed: 2
Number of 45° elbows needed: 1
Table 13
Calculation of example
Max. length 28.5’
90° elbow reduction - 10’
sub-total = 18.5’
45° elbow reduction - 2.5’
Total = 16’
Table 14
For this example, the maximum allowable combustion
air pipe length is
16 feet .
System used Twin pipe
Number of 90° elbows needed: 2
Number of 45° elbows needed: 2
Table 15
Calculation of example
Max. length 61.25’
90° elbow reduction - 10’
sub-total = 51.25’
45° elbow reduction - 5’
Total = 46.25’
Table 16
For this example, the maximum allowable exhaust pipe
length is
46.25 feet .
System used Twin pipe
Number of 90° elbows needed: 1
Number of 45° elbows needed: 2
Table 17
Calculation of example
Max. length 61.25’
90° elbow reduction - 5’
sub-total = 56.25’
45° elbow reduction - 5’
Total = 51.25’
Table 18
For this example, the maximum allowable combustion
air pipe length is
51.25 feet .