American Water Heater ABCG3, BCG3 - page 18

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 (gure 13) and tables
below which give sizing and data based upon NfPA 54/ANSi
Z223. 1992.
taBle 7. technical data Venting
model Bcg370t1205nox
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 Bcg380t1506nox
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 Bcg395, (a)Bcg3100-180, 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