Bryant BFIT 1000, Installation, Operation And Maintenance Manual

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Table 20: Specific Gravity Correction Factors
X. Gas Piping
(continued)
Specific
Gravity
Correction
Factor
Specific
Gravity
Correction
Factor
0.60 1.00 0.90 0.82
0.65 0.96 1.0 0.78
0.70 0.93 1.10 0.74
0.75 0.90 1.20 0.71
0.80 0.87 1.30 0.68
0.85 0.81 1.40 0.66
16. The gas pressure switches will trip if the
incoming gas pressure under or overshot the
switches' set point (see Table 21). A tripped
switch is indicated by a neon light. Manual
reset is required to reset the switch and resume
boiler operation.
Boiler
Model
Min. Gas
Pres.
(In. W.C.)
Max. Gas
Pres.
(In. W.C.)
High Gas
Pres.
Switch
1
(In. W.C.)
Low Gas
Pres.
Switch
1
(In. W.C.)
Inlet
Size
(In.)
BFIT 1000
4 14 1 3
1
BFIT 1250 1
BFIT 1500 1.25
BFIT 2000 1.25
1
Factory default high and low gas pressure switch set point.
WARNING
Failure to properly pipe gas supply to boiler
may result in improper operation and damage
to the boiler or structure. Always assure gas
piping is absolutely leak free and of the proper
size and type for the connected load.
An additional gas pressure regulator may be
needed. Consult gas supplier.
Failure to use proper thread compound on all
gas connectors may result in leaks of flammable
gas.
Gas supply to boiler and system must absolutely
shut off prior to installing or servicing boiler
gas piping.
Do not use matches, candle, open flame or other
ignition source to check for leaks.
Use to wrenches when tightening gas piping
at boiler, use one wrench to prevent boiler gas
train line from turning.
Failure to support the boiler connection pipe
could damage safety components.
Ensure that the high gas pressure regulator is
at least 10 feet (3 m) upstream of the appliance.
Table 21: Inlet Gas Pressure
Figure 20: High/Low Gas Pressure Switch