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7.1 General
• Use piping materials and joining methods acceptable
to authority having jurisdiction. In absence of such
requirements:
• USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54
• Size and install gas piping system to provide sufficient gas
supply to meet maximum input at not less than minimum
supply pressure.
Required Gas Rate
GMHB227
GMHB380
Natural Gas =
225 FT
3
/H
(6.39 M
3
/H)
377 FT
3
/H
(10.7 M
3
/H)
LP =
89 FT
3
/H
(2.5 M
3
/H)
149 FT
3
/H
(4.2 M
3
/H)
• Gas meter and supply pipes must be capable of delivering
the listed quantity of gas in addition to demand from any
other appliances in the house. Support piping with hooks
straps, bands, brackets, hangers, or building structure
components to prevent or dampen excessive vibrations and
prevent strain on gas connection. Boiler will not support
piping weight.
• Use thread (joint) compound (pipe dope) suitable for
liquefied petroleum gas.
• Install external field sourced manual main gas shutoff
valve, ground joint union, and sediment trap upstream of
gas valve. See figures 7-2 and 7-3.
• Leak test boiler and gas line connections before placing
boiler into operation.
7.2 LP Conversion
• See conversion instructions included with LP Conversion
Kit. Purchased Separately.
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 fire
department.
!
FIGURE 7-1 Gas Connection
Gas Connection
Note
Figure 7-2- Drip Leg
Gas Supply
Pressure
Natural Gas
LP
Min
Max
Min
Max
3.0
13.5
5.0
13.5
Use two (2) wrenches when tightening and
fitting to pipe boiler's threaded fittings. Boiler's
internal piping can be damaged if subjected to
excessive torque.
PN 240012369, REV A [08/31/2018]
7 - GAS SUPPLY PIPING
Содержание GMHB227
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