34
7.2 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.
7.3 Gas Orifice
- See Figure 7-2
Models 125, 150 = 5.8 mm (Natural & LP)
Models 165, 205 = 9.0 mm (Natural & LP)
Figure 7-1 - Gas Piping
NOTICE
Sediment trap shall be located upstream of gas
controls.
7 - GAS SUPPLY PIPING
NOTICE
If overheating occurs or gas supply fails to shut off, do
not turn off or disconnect electrical supply to pump.
Shut off gas supply at location external to the boiler.
FIGURE 7-2 Gas Orifice Location
Gas Orifice (Green Side
Down - Toward gas valve)
Gas Valve
240012879 REV A, [01/31/2020]
Summary of Contents for Dunkirk DCBF-125
Page 63: ...61 A 1 MODELS 125 Heat Only APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 64: ...62 APPENDIX A WIRING DIAGRAMS A 2 MODELS 165 Heat Only 240012879 REV A 01 31 2020...
Page 65: ...63 A 2 MODELS 150 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 66: ...64 A 4 MODELS 205 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 67: ...65 NOTES 240012879 REV A 01 31 2020...
Page 68: ...66 NOTES 240012879 REV A 01 31 2020...
Page 99: ...29 MODEL 150F Combi 150F FLOOR STANDING COMBI WIRING DIAGRAM PN 240012875 REV A 01 31 2020...
Page 101: ...31 205F FLOOR STANDING COMBI WIRING DIAGRAM MODEL 205F Combi PN 240012875 REV A 01 31 2020...
Page 106: ...36 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240012875 REV A 01 31 2020...
Page 114: ...44 NOTES PN 240012875 REV A 01 31 2020...
