OPERATING INSTRUCTIONSOMEGA
Page 2
Precautions
! Use filtered air. Avoid grease,oil, or oil vapors, corrosive orreactive gaseswhich will damage heater.
! Use exposed junction type “K”thermocouple within one inch of the heater exit for good control.
Installation and Wiring
See attached drawings.
WARNING! Sensors are at or near line voltage. Use teflon jacketed, teflon insulated “K” thermocouple wire to
connect heater sensors to the over-temperature board.
1. Be sure heater issecurelymounted.
2. Followallapplicable electrical codes when mounting and wiring heater and control components.
Operation
1. Turn on air and setpressure or flowto desired operating level.
2. Turn on power to the over-temperature board.
3. Turn on power to the power controller.
4. Turn on power to the temperature controller.
5. Set desired temperature on temperature controller.
During operation, with steady-state airflow, the exit temperature should not varymore than a fewdegrees from set
point. Although the heater will not burn out with zero airflow, if the heater is operated in a vertical downward position
and an airflowof 100 SCFH or belowis run through the heater, the inlet temperature of the heater will exceed 150°F
and the Over-temperature board will begin to limitpower to the heater.
To Shut Down:
1. Turn off power to the temperature controller and the power controller.
2. Allowair to continue toflowfora minimum of 1minuteor until exit air temperatureis 150°C or less for
safety. Continue airflowlongerif hot equipmentcomponents present anypotential hazardto personnel.
3. Turn off airto the system.
Replacing Elements
Before replacing the element assembly, determine the cause of the element failure. Prior to powering the system
back up,make certain that theentire system is operating properly. Possiblecauses of element failure are:
1. Normal end of Life
2. Failure in Control System
3. Mechanical Damage to System
REPLACEMENT PROCEDURE
1. Turn off power to the system. Followlock-out/tag-outprocedures.
2. Unscrewthe 3 external housing screws and remove the stainless heater housing.
3. Unplug element from its socket and plug newelementinto the socket.
4. Slide the stainless heater housing back over the element andsecure housingwith the 3 external housing screws.
Performance Curves
The following curves showthe maximum temperature performanceof theSH-Series heater asmeasured bya “K”
type thermocouple located within 1” of heater exit. Use of other temperature measuring devices or varying the
distance of the measurementmaycause different temperature readings. The heaters will not generate temperatures
greaterthan indicatedon the graph in and if used correctlywill maintain operating life in excess of 5000 hours.
