McElroy 2CU, Operator'S Manual

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Maintenance
5 - 4
Adjusting Heater Temperature
Turn knob to desired temperature. Measure the heater surface
temperature with a pyrometer. Any variance must be corrected to the
pyrometer reading.
Loosen setscrew in the knob. Turn knob to point to the same temperature
as the pyrometer. Tighten setscrew in the knob.
Turn knob to desired temperature. Allow heater to stabilize at the new
temperature (5 to 10 minutes) after adjusting.
The thermometer on the heater body indicates internal temperature and
should be used as a reference only.
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Heater Indicator Light
The heater has a green indicator light which will flash on and off. This
indicates that the controller is operating normally. If the green indicator is
not flashing then the controller may not be operating properly. If this occurs,
disconnect power and have the heater repaired by a McElroy Authorized
Service Center.
The heater has a red indicator light on the handle at the bottom of the
temperature scale. When the heater is plugged in and preheating the light
glows steadily until the set temperature is reached. The light then goes off
and on slowly as the heater maintains temperature.
If the heater is not operating properly, the control will attempt to turn the
heater off and the indicator light will flash rapidly. If this occurs, disconnect
the power and take it to a McElroy Authorized Service Center for repair.
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