HELIX VX-050 Installation, Operation & Maintenance Manual page 32

!
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
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 and 7-4.
• 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 Gas Shutoff Valve - Outside
Boiler Jacket (view from top rear of boiler)
Supplied Manual
Main Gas
Shutoff Valve
(shown in open
position)
FIGURE 7-3 Gas Shutoff Valve - OPEN PARALLEL TO
PIPE
OPEN
FIGURE 7-4 Gas Shutoff Valve - OFF PERPENDICULAR
TO PIPE
GAS SHUTOFF
VALVE
PIPE
32
OPEN
PIPE
GAS SHUTOFF
VALVE