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7-2 Manual Main Gas Shutoff Valve Outside
Boiler Jacket
7.3 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
boiler and its individual gas shutoff valve from
gas supply system.
•
Pressure test at 1/2 psig (3.5 kPa) or less.
Isolate boiler from gas supply system by closing
manual gas shutoff valve. See fi gure 7-3.
•
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.
Manual Main Gas
Shutoff Valve
7 - GAS SUPPLY PIPING
7-3 Gas Shutoff Valve
Gas shutoff valve
(shown in closed
position)
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.
!
G
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