Vulcan-Hart F-37418 Oven Burner Nozzle and Gas Orifice Check, Air Shutter Adjustment

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.

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