40
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
•
Install manual main shutoff valve before the gas valve
accordance with state and local requirements.
•
Size and install gas piping system to provide sufficient gas
supply to meet maximum input at not less than minimum
supply pressure.
• 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. Boiler requires a 3/4” (19.5
mm) gas supply pipe.
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.
!
7 - GAS SUPPLY & PIPING
DANGER
Fire Hazard. Do not use matches, candles, open
flames, or other methods providing ignition source.
Failure to comply will result in death or serious injury.
!
NOTICE
If overheating occurs or gas supply fails to shut off, do
not turn off or disconnect electrical supply to pump.
Shut off gas supply at location external to the boiler.
WARNING
If overheating occurs or gas supply fails to shut off, do
not turn off or disconnect the electrical supply to the
pump. Shut off gas supply at a location external to the
appliance.
Do not use this boiler if any part has been under water.
Call a qualified service technician before use.
!
WARNING
Fire, explosion, asphyxiation and burn hazard. Boiler
piping and gas connections shall be leak tested before
placing boiler in operation. Failure to follow these
instructions and or improper installation could result in
death or serious injury.
!
Model
Gas Rate FT
3
/H (M
3
/H)
Nat.
LP
GMHB125
119.6 (3.38)
48.0 (1.35)
GMCB150
144.0 (4.08)
57.8 (1.64)
GMBH160
156.9 (4.44)
63.0 (1.78)
GMCB200
196.0 (5.55)
78.7 (2.22)
• 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 manual main gas shutoff valve and field
supplied ground joint union, and sediment trap upstream of
gas controls. See Figure 7-1.
• Install boiler so gas ignition system components are
protected from water dripping, spraying,rain, etc. During
appliance operation and service.
• Leak test boiler and gas line connections before placing
boiler into operation.
Required Gas Line Pressures:
Models
Gas
Manifold*
Minimum
Supply
Maximum
Supply
All
Models
Natural
Gas
0 inches
w.c.
(0.0 kPa)
3.0 inches
w.c.
(0.7 kPa)
10.5
inches w.c.
(3.3 kPa)
All
Models
Propane
Gas
0 inches
w.c.
(0.0 kPa)
5 inches
w.c.
(1.2 kPa)
13.5
inches w.c.
(3.3 kPa)
WARNING
Boiler and its individual shutoff valve must be
disconnected from gas supply piping system during
any pressure testing of that system at test pressures
in excess of 1/2 psi (3.40 kPa - 34.47 mbar).
Boiler must be isolated from the gas supply piping
system by closing its individual manual shutoff valve
during any pressure testing of gas supply piping
system at test pressures equal to or less than 1/2 psi
(3.5 kPa).
!
*
REFERENCE ONLY.
PN 240012363 REV. A [08/31/2018]
