Product Manual

OPERATION CONTINUED
The manual reset safety high limit shall de-energize the heating element(s) and/or control circuit should the
temperature exceed the setting of this device.
The fan safety override shall energize the fan motor any time the setting of this device is exceeded so as to
purge the heater casing of excess residual heat.
When accessory floor level fan switch is placed in the ON position (for summer air circulation) the unit heater
fan motor shall be energized.
NOTE: The thermostat is to be set to the OFF position during this mode of operation.
NOTE: EXCEPT IN CASES OF EMERGENCY, DO NOT OPEN MAIN DISCONNECT WHILE HEATER IS IN
OPERATION. THIS DISCONNECTS ALL POWER TO THE HEATER PREVENTING THE FAN FROM PURGING
THE HEATING ELEMENTS OF RESIDUAL HEAT AND MAY RESULT IN THE THERMAL CUT-OUT(S) OPEN-
ING.
THERMAL CUT-OUTS
If for any reason heater temperatures increase beyond normal limits, safety thermal cut-out(s) will open, de-
energizing the heating element(s) and/or control circuits. Check entire installation to determine cause of
overheating and after corrective measures have been taken, push thermal reset button(s) on side of power
wiring enclosure.
MAINTENANCE
IN CLEANING OR DISASSEMBLING HEATER, BE SURE TO DISCONNECT HEATER POWER CIRCUIT.
Heaters up to capacities of 20KW have permanently lubricated motors and therefore no maintenance other
than occasional cleaning is required.
Heaters over 20KW have motors which should be oiled once a season with S.A.E. No. 10 motor oil.
Motor and guard assembly can be removed for cleaning without removing heater from the ceiling as follows:
Remove optional diffuser is heater is so equipped. Disconnect motor and the capacitor leads inside power
wiring enclosure. Remove motor conduit locknut. Remove four nuts and lockwashers which hold motor mount
assembly to inside top of heater. To reassemble, reverse the above procedure.
FORM: 8932