Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual page 33

!
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.
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 figure 7-2.
• Locate leakage using gas detector, noncorrosive
detection fluid, or other leak detection method
acceptable to authority having jurisdiction. Do
not use matches, candles, open flames, or other
methods that can provide ignition source.
• Correct leaks immediately and retest.
7 - GAS SUPPLY PIPING
FIGURE 7-2 Manual Main Gas Shutoff Valve Outside
Boiler Jacket
Manual Main Gas
FIGURE 7-3 Gas Shutoff Valve - 050/075/100/150/200
FIGURE 7-4 Gas Shutoff Valve - 299
33
Shutoff Valve
Gas shutoff valve
(shown in closed
position)
Gas shutoff valve
(shown in open
position)