Model 4
1500 - 6000 MBTU/hr
Rev. 03-08
Section B2-13
Table B2-5. Minimum required NATURAL GAS pressure at entrance to STANDARD UL, FM, & XL GAP gas
trains (upstream of gas pressure regulator)
BOILER
SIZE
INLET PIPE
SIZE
(inches)
HONEYWELL
VALVE SIZE
(inches)
PRESSUR E REQ UIRED
REQ UIRED FUEL
FLOW (SC FH)
MIN ("W .C.)
MAX ("W.C.)
1500
1.5
1.5
4.4
28.0
1500
2000
1.5
1.5
8.4
28.0
2000
2500
1.5
1.5
12.9
28.0
2500
3000
1.5
1.5
17.1
28.0
3000
3500
2.0
2.0
11.3
28.0
3500
4000
2.0
2.0
13.6
28.0
4000
4500
2.0
2.0
12.2
28.0
4500
5000
2.0
2.0
16.8
28.0
5000
6000
2.0
2.0
21.5
28.0
6000
N ote: For altitude above 1000 feet, contact your local Cleaver-Brook s representative.
N atural Gas @ 1000 Btu/c u-ft, specific gravity @ 0.65
Table B2-6. Minimum required NATURAL GAS pressure at entrance to OVERSIZED UL, FM, & XL GAP gas
trains (upstream of gas pressure regulator)
BOILER
SIZE
INLET PIPE
SIZE
(inches)
HONEYW ELL
VALVE SIZE
(inches)
PRESSUR E REQ UIRED
REQ UIRED FUEL
FLOW (SC FH)
MIN ("W.C.)
MAX ("W .C.)
1500
2.0
2.0
2.3
28.0
1500
2000
2.0
2.0
4.8
28.0
2000
2500
2.0
2.0
6.5
28.0
2500
2.5
2.5
5.7
3000
2.0
2.0
9.0
28.0
3000
2.5
2.5
6.8
3.0
3.0
6.0
3500
2.5
2.5
9.7
3500
3.0
3.0
7.1
4000
2.5
2.5
11.8
4000
3.0
3.0
8.5
4500
2.5
2.5
9.8
4500
3.0
3.0
5.6
5000
2.5
2.5
12.9
28.0
5000
3.0
3.0
7.1
4.0
4.0
5.6
6000
2.5
2.5
17.5
28.0
6000
3.0
3.0
10.0
4.0
4.0
7.9
N ote: For altitude above 1000 feet, contact your local Cl eaver-Brook s representati ve.
N atural Gas @ 1000 Btu/c u-ft, specific gravity @ 0.65
