18
type b gas Vent
multiple gas fired tank-type heaters
When venting multiple tank type heaters using Type B vent
pipe, follow the installation diagram (figure 13) and tables
below which give sizing and data based upon NfPA 54/ANSI
Z223. 1992.
table 7. technical data Venting
model n71120ne
input: 120,000 btu/hr total Vent height (feet)
Vent connector size: 5 inches
6
8
10
15
20
30
50
100
input btu/hr
rise
Vent connector diameter (inches)
120,000
1 ft.
6
6
5
5
5
5
5
5
120,000
2 ft.
5
5
5
5
5
5
5
5
120,000
3 ft.
5
5
5
5
5
5
5
5
number of
heaters
combined input
in thousands of btu/hr manifold and common Vent diameter (inches)
2
240,000
7
7
6
6
6
6
6
6
3
360,000
8
8
7
7
7
6
6
6
4
480,000
9
9
9
8
8
7
7
6
model n81154ne
input: 154,000 btu/hr total Vent height (feet)
Vent connector size: 6 inches
6
8
10
15
20
30
50
100
input btu/hr
rise Vent connector diameter (inches)
154,000
1 ft.
6
6
6
6
6
6
6
6
154,000
2 ft.
6
6
6
6
6
6
6
6
154,000
3 ft.
6
6
6
6
6
6
6
6
number of
heaters
combined input
in thousands of btu/hr manifold and common Vent diameter (inches)
2
308,000
7
7
6
6
6
6
6
6
3
462,000
8
8
7
7
7
6
6
6
4
616,000
9
9
9
8
8
7
7
6
model n100-180, 199, 200
input: 180,000 and 199,000 btu/hr total Vent height (feet)
Vent connector size: 6 inches
6
8
10
15
20
30
50
100
input btuh/hrrise
Vent connector diameter (inches)
180,000
1 ft.
7
7
6
6
6
6
6
6
199,000
1 ft.
7
7
7
6
6
6
6
6
180,000
2 ft.
6
6
6
6
6
6
6
6
199,000
2 ft.
7
7
6
6
6
6
6
6
180,000
3 ft.
6
6
6
6
6
6
6
6
199,000
3 ft.
6
6
6
6
6
6
6
6
number of
heaters
combined input
in thousands of btu/hr manifold and common Vent diameter (inches)
2
360,000
7
7
6
6
6
6
6
6
398,000
7
7
7
6
6
6
6
6
3
540,000
7
6
6
6
6
6
6
6
597,000
7
7
6
6
6
6
6
6
4
720,000
6
6
6
6
6
6
6
6
796,000
6
6
6
6
6
6
6
6
Содержание N71120NE
Страница 25: ...25 LIGHTING OPERATION LABEL FIGURE 22...
Страница 51: ...notes 51...
Страница 52: ...notes 52...
Страница 53: ...notes 53...
Страница 54: ...notes 54...
