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Oven Burner Nozzle and Gas Orifice Check
The oven burner nozzle is mounted between the oven gas manifold and the u-burner assembly.
If burner operation seems poor and other systems have been checked, remove the burner
nozzle and check for blockage or damage as follows:
WARNING: Always perform the Electrical Lockout/Tagout procedure before removing
any sheet metal panels or attempting to service this equipment. Failure to comply with
this procedure can cause property damage, injury or death.
WARNING: Perform the GAS LOCKOUT/TAGOUT procedure before servicing the unit.
1. Perform the OVEN BURNER NOZZLE AND GAS ORIFICE REMOVAL procedure.
2. Remove the burner hood.
3. Check for blockage or damage.
WARNING: All gas joints disturbed during servicing must be checked for leaks. Do
not use an open flame. Use a hazardous gas tester or a soap and water solution
(Bubbles indicate a gas leak). Failure to comply can cause property damage, injury or
death.
4. Reverse the procedure to install the oven burner nozzle and gas orifice.
5. Test the oven to verify proper operation.
Figure 33: Oven Burner Nozzle and Gas Orifice Check
Air Shutter Adjustment
The efficiency of the burners depends upon a delicate balance between the air supply and the
volume of gas. When this balance is disturbed, poor operating characteristics and excessive
gas consumption will occur.
An air shutter on the front of each burner controls the air-gas mixture. With natural gas, the air
shutter will be approximately 50% open. On propane (LP) the air shutter will be approximately
90% open.
If the flame is soft, lazy, or yellow:
There is not enough primary air. To correct this condition:
1. Rotate the air shutter open until the burner flame begins to lift from the burner, then
close the shutter slightly.