User Manual

33
Heater Maintenance Checklist
A.1 Periodic
࢞ Clean
 Finned Tubes
 Cabinet top and below unit
 Remove dust using compressed air. Do not spray
with water or solvents. Do not immerse in water

࢞ Check
 All explosion-proof covers for tightness.
A.2 Annual
࢞ Mechanical Check
 Check all enclosures. Inside of enclosures must
be clean, dry, and free of foreign materials.
Enclosure joints are metal to metal. Do not use

 Check the tightness of all hardware. All nuts and
bolts must be tight.
 
Check for warm air exiting heater through top
vents.
࢞ Electrical Check
 Check all terminal connections and conductors.
Tighten loose connections. Conductors with
damaged insulation must be replaced.
 Check all explosion-proof conduits. Replace
damaged conduits, unions, and plugs. Ensure
5 turns of engagement on all threaded
connections.
A. HEATER MAINTENANCE CHECKLIST
WARNING
WARNING. Disconnect heater from the power supply before opening enclosures or servicing heater.
Lock the switch in the “OFF” (open) position and/or tag the switch to prevent unexpected power application. For heaters
marked "IIC", ensure to loosen the setscrew before removing the cover.
This heater should only be serviced by personnel with heating and hazardous location equipment experience.
Heater Model
Serial Number
Comments
Date of Maintenance
Maintenance Done By
(before and as required during heating season)
(before heating season)
For assistance, please call
Toll Free: 1-800-661-8529 (24 hrs)
U.S. & Canada
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