HELIX VX-399 Installation, Operation & Maintanance Manual page 30

!
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 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 - Inside Boiler
Jacket
FIGURE 7-3 Gas Shutoff Valve - OPEN Parallel To Pipe
FIGURE 7-3 Gas Shutoff Valve - CLOSED Perpendicular To Pipe
30
Gas Valve
Supplied Manual Main Gas
Shutoff Valve
(shown in open position)
OPEN
CLOSED
P/N 240010943, Rev. C [09/07/2016]