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)
P RES SUR E REQ UIRED
REQ UIRED F UE L
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
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