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9 - CONNECTING GAS SERVICE
9.1 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
•
gas supply to meet maximum input at not less than
minimum supply pressure. See Table 9-1.
• 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
•
joint union, and sediment trap upstream of gas valve.
See Figure 9-1.
MAXIMUM CAPACITY OF PIPE IN CUBIC FEET OF
GAS/HOUR
(Gas Pressure = 0.5 psig or less, Pressure Drop = 5
in. w/c)
Table 9-2
Length of
Pipe (Feet)
Nominal Iron Pipe Size
½” ¾” 1” 1¼”
10 175 360 680 1400
20 120 250 465 950
30 97 200 375 770
40 82 170 320 660
60 66 138 260 530
80 57 118 220 460
100 50 103 195 400
For additional information refer to the National Fuel Gas
Code Handbook.
Figure 9-1 - Gas Piping
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.
•
department.
!!
INSTALL MANUAL
VALVE WITHIN 6 FT.
(183 cm) OF BOILER
AND 5 FT. (152 cm)
ABOVE THE FLOOR
WHERE REQUIRED
BY LOCAL CODES
3" (8 cm) Minimum
Sediment Trap
To Gas Control Inlet
DANGER
Fire Hazard. Do not use matches, candles, open
Failure to comply will result in death or serious
injury.
!
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.
!
NOTICE
Use of CSA approved corrugated, semi-rigid
stainless steel tubing with polyethylene jacketing
is approved for use with boilers following tubing
manufacturer's instructions.
"whip" is not allowed per NFPA 54.
Table 9-1 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" w.c.
(4 sec. only)
10.5" w.c.
9.2 Leak Check Gas Piping
Pressure test boiler and gas connection before placing
boiler in operation.
•
Pressure test over 1/2 psig (3.5 kPa). Disconnect
supply system.
•
Pressure test at 1/2 psig (3.5 kPa) or less. Isolate
boiler from gas supply system by closing manual gas
•
Locate leakage using gas detector, non-corrosive
acceptable to authority having jurisdiction. Do not
providing ignition source.
•
Correct leaks immediately and retest.
Union
Recommended
for service
PN 240012787 Rev. C [11/15/2020]
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