Manual

24
Problem 6
Heater does not Operate from Main Burner to Pilot Only.
Do
Environment Control
Thermostat Contacts Open
and Close? (Perform
Continuity Check.
Replace Thermostat.
Defective Solenoid Valve on Zone Panel, or Debris is Lodged in Plunger of Solenoid. Replace Solenoid Valve Assembly.
No
Yes
Heater Backflashes Gas Through Air Inlet.
Problem 5
Is Inner
Cone Seam
Fractured or is Tip
Damaged or
Missing?
Replace Combustion Cone.
Yes
No
Are
Injector
Body, Burner
Orifice,Filter, Venturi
Tube, or Inner Cone
Partially Plugged with
Dirt?
Clean these
Components.
No
Is Proper
Gas Pressure
Being Supplied to
the Heater?
Check for Proper
Gas Pressure.
Proper Pressure at
High Heat Should
Read 5 PSIG.
Yes
No
Combustion Cone KitS
Part NumbeR
21088
Yes
Are Burner
Assembly
Nuts Loose?
Yes
Tighten the Nuts
Is the Burner
Plate or Burner
Gasket
Cracked?
Yes
Replace the Burner
Plate.or Gasket
No
No
Is Inner Cone
Weld Seam
Aligned to
Burner Plate
Notch?
No
Position the Inner Cone
Weld Seam in Burner
Plate Notch.