20
MAINTENANCE
4. When the burner starts for the fourth time, the thermometer/pyrometer reading should be
within ± 5ºF (2ºC) of the temperature knob setting. If it is not, calibrate as follows:
a. Loosen the setscrew in the temperature control knob until the knob will rotate freely
on its shaft.
b. Rotate the knob until the index line on the knob is aligned with the marking that
corresponds to the thermometer or pyrometer reading.
c. Hold the knob and carefully tighten the setscrew.
d. Recheck the thermometer/pyrometer reading against the temperature control knob
setting the next time the burner comes on.
e. Repeat steps 4.a. through 4.d. until the thermometer/pyrometer reading and knob
setting agree within ± 5ºF (2ºC).
5. Remove the thermometer or pyrometer.
If calibration cannot be obtained for any reason, call a Montague Company Authorized Ser-
vice Agency for assistance.
Check Thermostat Calibration
1. Set the temperature control knob to 325°F (162°C) and insert a good grade thermometer or
pyrometer into the frypot so that it touches the thermostat.
2. When the burner cycles off, set the temperature control knob to 340°F (170°C). As the read-
ing on the thermometer or pyrometer nears the control knob setting, but before the burner
cycles off, reset the knob to 325°F (162°C). Just as the reading on the thermometer or pyrom-
eter drops below 325°F (162° C), the burner should cycle on. If it does not, calibration is re-
quired. Call your Montague Company Authorized Servicer to arrange this service.
Clean Gas Valve Vent Tube
1. Carefully unscrew the vent tube from the gas valve. NOTE: The vent tube may be straight-
ened for ease in removal.
2. Pass a piece of ordinary binding wire (.052 inch diameter) through the tube to remove any
obstruction.
3. Remove the wire and blow through the tube to ensure it is clear.
4. Reinstall tube and bend it so that the opening is pointing downward.
Summary of Contents for Legend RD18
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