16
GAS SUPPLY PIPING
Figure 13 - Gas Piping At Boiler
CAUTION
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the
fi
re
department.
!
!
General
• Use piping materials and joining methods acceptable
to authority having jurisdiction. In absence of such
requirements National Fuel gas Code, ANSI Z223.1/
NFPA 54.
• Size and install gas piping system to provide suf
fi
cient
gas supply to meet maximum input at not less than
minimum supply pressure. See Table 6.
T able 6
Natural Gas
Propane
Min. Supply Pressure
5" w/c
11" w/c
Max. Supply Pressure
13.5" w/c
13.5" w/c
Manifold Pressure
3.5" w/c
10.5" w/c
• Support piping with hooks straps, bands, brackets,
hangers, or building structure components to prevent or
dampen excessive vibrations and prevent strain on gas
connection. Gas valve will not support piping weight.
• Use thread (joint) compound (pipe dope) suitable for
natural and lique
fi
ed petroleum gas.
• Install
fi
eld sourced manual main shutoff valve, ground
joint union, and sediment trap upstream of gas valve.
See Figure 13.
Propane Installation
WARNING
Fire, explosion, asphyxiation hazard. Verify boiler
is equipped with propane gas ori
fi
ces and gas valve
is con
fi
gured for propane. Failure to follow these
instructions may result in serious injury or death.
• Connections by licensed propane dealer only.
• Use two stage regulator provided by propane
supplier.
• Have propane supplier check piping.
DANGER
Fire Hazard. Do not use matches, candles, open
fl
ames, or other methods providing ignition source.
Failure to comply will result in death or serious
injury.
!
Leak Check Gas Piping
Pressure test boiler and gas connection before placing
boiler in operation. Avoid excessive pressure that could
damage pressure regulators, valves, or meters.
• Pressure test at 1/2 psig (3.5 kPa) or less. Isolate
boiler from gas supply system by closing manual gas
shutoff valve.
• Locate leakage using gas detector, noncorrosive
detection
fl
uid, or other leak detection method
acceptable to authority having jurisdiction. Do not
use matches, candles, open
fl
ames, or other methods
providing ignition source.
• Correct leaks immediately and retest.
!
