Owner manual

10
TYPE B GAS VENT
Multiple Gas Fired Tank-Type Heaters
When venting mutiple tank type heaters using Type B
vent pipe, follow the installation diagram (gure 8) and
tables below which give sizing and data based upon
NFPA 54/ANSI Z223.
TECHNICAL DATA VENTING, TABLE 3
MODEL JWSM71120
Input: 120,000 Btuh Total Vent Height (Feet)
Draft Hood: 5” 6 8 10 15 20 30 50 100
Input Btuh Rise Vent Connector Diameter (inches)
120,000 1 Ft. 7 7 7 6 6 6 6 6
120,000 2 Ft. 6 6 6 6 6 6 6 5
123,000 3 Ft. 6 6 6 6 6 5 5 5
Number of Heaters
Combined Input in
Thousands of Btuh
Manifold and Common Vent Diameter (In inches)
2
3
4
240 10 8 8 7 7 7 6 7
360 10 10 10 10 8 8 7 7
480 12 12 12 10 10 10 8 8
MODEL JWSM95199, JWSM76199, & (A)JWSM100199
Input: 199,000 Btuh Total Vent Height (Feet)
Draft Hood: 6” 6 8 10 15 20 30 50 100
Input Btuh Rise Vent Connector Diameter (in inches)
199,000 - - 8 8 8 8 8 7
199,000 8 8 8 8 7 7 7 7
190,000 8 7 7 7 7 7 6 6
197,000 8 7 7 7 7 7 7 6
199,000 8 8 7 7 7 7 7 6
Number of Heaters
Combined Input in
Thousands of Btuh
Manifold & Common Vent Diameter
2
358 10 10 10 10 8 8 7 7
380 12 10 10 10 10 8 7 7
394/398 12 10 10 10 10 8 8 7
3
537 14 12 12 12 10 10 10 8
570 14 12 12 12 10 10 10 10
591/597 14 14 12 12 12 10 10 10
4
716 14 14 14 12 12 12 10 10
760 16 14 14 14 12 12 10 10
788/796 16 14 14 14 12 12 12 10
CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.COM)CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.COM)