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HALF-SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
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SERVICE PROCEDURES AND ADJUSTMENTS
WARNING:
CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR
MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL
TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST
EQUIPMENT AND REAPPLY POWER TO TEST.
TEMPERATURE PROBE
TEST (ALL MODELS)
WARNING:
UNPLUG UNIT BEFORE SERVICING.
1. Remove the right side panel as outlined under
"COVERS AND PANELS".
2. Remove the probe lead wires from the
electronic control.
3. Test the probe with an ohmmeter.
TEMPERA-
TURE
in F
RESISTANCE
in ±10%
77 90000
240 4077
260 3016
280 2266
300 1726
320 1332
340 1041
360 822
380 656
400 529
425 424
450 334
475 266
VERIFICATION OF SPARK
AT SPARK PROBE
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. Disconnect the high voltage lead from the
electrode.
WARNING:
DO NOT HOLD THE WIRE WITH
YOUR HANDS FOR THIS TEST. THE MANUAL
GAS VALVE MUST BE CLOSED.
3. Clamp the wire in such a manner that the end
of the wire is 3/16" from the frame of the oven.
NOTE:
It is critical that the wire be held 3/16" away
from the oven or sparking may not occur even
though the probe circuits are functioning properly.
WARNING:
THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
THE TEST. USE EXTREME CAUTION AT ALL
TIMES.
4. Plug the unit in and set the temperature
controller to the maximum setting.
5. Turn the power switch on.
6. Sparking should occur after a 15 second purge
time. Arcing from the lead wire to the oven
frame should be observed at this time.