Leak Check Gas Piping; Gas Orifice - Dunkirk DCB-100 Manual

NOTICE
Sediment trap shall be located upstream of gas
controls.

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.
• 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.
7.4 Gas Orifice - See Figure 7-2
• Model 100, 115 = 4.6 mm ( Natural & LP)
• Models 125, 150 = 5.8 mm ( Natural & LP)
• Models 165, 205 = 9.0 mm ( Natural & LP)
7 - GAS SUPPLY PIPING
FIGURE 7-1
FIGURE 7-2
Gas Valve
40
Gas Orifice Location
Gas Orifice (Green
Side Down - Toward
gas valve)
240013360 REV A [07/01/2021]