L.B. White I3 - Page 17

Is
There a
Blockage in the
Venturi Tube?
16
Problem 11
Inner
Combustion
Cone
Will
Not
Light
Are the
Individual
Control Valve’s Bypass
Orifice or Main Burner
Orifices Plugged?
Remove both Orifices and Clean with a Soft Brush or Compressed Air.
Yes
Yes
Yes
Is the Inner
Combustion Cone
Plugged?
Is
There Air or
a Blockage in the
Gas Hose or
Gas Piping?
Remove Blockage with Compressed Air or Replace the Gas Hose or Pipe Section. Bleed Off any Air from the Gas Line.
Clean the Heater.
Clean the Heater.
No
No
No
Is Proper
Gas Pressure
Supplied to the
Zone Panel or
Heater?
Provide 5 PSIG
Gas Pressure.
Yes
No
Are all Fuel
Supply Valves to
Heater Open?
Open All Fuel
Supply Valves.
Yes
No
Defective
Safety Control Valve.
Replace the Safety
Control Valve.
Yes
No