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HALF-SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
12
GAS PRESSURE
ADJUSTMENT
WARNING:
UNPLUG UNIT BEFORE SERVICING.
WARNING:
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Remove the right side panel and control panel
as outlined under “COVERS AND PANELS”.
2. Remove the plug from the test port and install
the manometer.
WARNING:
THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
THE TEST. USE EXTREME CAUTION AT ALL
TIMES.
3. Plug in the unit and turn on the gas.
4. Set the temperature control to the highest
setting and turn the power switch on. The
burner must be lit while adjusting the pressure.
5. Turn the adjustment screw to obtain the proper
gas pressure.
• Turn screw clockwise
to increase pressure.
• Turn screw counterclockwise
to decrease
pressure.
GAS TYPE SETTING AT OUTPUT
OF GAS VALVE
Natural 3.5 inches W.C.
Propane 10 inches W.C.
NOTE:
If input pressure is below 4.0 (Natural) or
10.5 (Propane) inches W.C., the desired output
cannot be obtained and the oven will overate at a
lower BTU.
SPARK IGNITION CONTROL
TEST
WARNING:
UNPLUG UNIT BEFORE SERVICING.
NOTE:
Verify that the ground terminal is connected
to the oven ground.
No Gas Ignition & No Sparking
1. Remove the right side panel as outlined under
“COVERS AND PANELS”.
2. Plug in the unit and set the temperature
controller to 350°.
3. Turn the power switch on.
4. Check for 24 VAC between the power terminal
and ground terminal.
A. If 24 VAC is present, replace the spark
ignition control.
B. If 24 VAC is not present, check the
transformer, temperature controller, and
switches.
No gas ignition - sparking occurs
1. Remove the right side panel as outlined under
“COVERS AND PANELS”.
2. Plug in the unit and set the temperature
controller to 350°.
3. Turn the power switch on.
4. Check for 24 VAC between the gas valve
terminal and the ground terminal. The voltage
should be present after
the 15 second purge
and during the 10 second ignition period.
A. If 24 VAC is present, check the gas valve
and gas supply.
B. If 24 VAC is not present, replace the spark
ignition control.