User Manual

14
Heater Maintenance Instructions
I. HEATER MAINTENANCE CHECKLIST
Heater Model
Serial Number
Comments
Date of Maintenance
Maintenance Done By
I.1 Periodic (before and as required during heating season)
• Clean - Use compressed air only.
 Heating Elements
 Louvers
 Motor
 Inlet Grille
 Fan
• Mounting & Motor Check
 All mounting hardware condition and
tightness
 Motor for smooth, quiet operation
I.2 Annual (before heating season)
• Electrical Check
 All terminal connections and conductors.
Tighten loose connections. Conductors with
damaged insulation must be replaced.
 Electrical resistance on all load side legs.
Reading should be balanced (± 5%).
WARNING
WARNING. Disconnect heater from power supply at
integral disconnect or fuse box before opening enclosures
or servicing heater.
Lock the switch in the “OFF” (open) position and tag the
switch to prevent unexpected power application.
This heater should only be serviced by qualied personnel
with electrical heating equipment experience.
WARNING
WARNING. Use this heater only as described in this
manual. Any other use not recommended by the
manufacturer may cause re, electric shock, or injury
topersons.
• Mechanical Check
 Check heating elements for corrosion and
debris buildup. Clean as required.
 Check motor shaft bearing play. Replace
motor if play is excessive, or if motor does
not run quietly and smoothly. Bearings are
permanently lubricated.
 Check fan. Replace immediately if cracked,
damaged, or out of balance.
 Check tightness of all hardware. All fasteners
must be tight.
 Turn heater on for a minimum of ve minutes.
Check for warm air exiting heater through
discharge louvers.