BAC PCT Series, Operation & Maintenance Manual

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W W W . B A L T I M O R E A I R C O I L . C O M . A U
M A R 1 0 8 - 2
Fan Motors
Fan Drive System Descriptions
Direct Drive Motors: For direct driven units the motor is TEAO epoxy
coated IP66.
Belt Drive Motor: The fan motor used on belt driven PCT units is a
TEFC motor, with permanently lubricated ball bearings. The motor is
installed fully outside of the wet air stream.
Electrical Connection (by others): All electrical connections should
be carried out by qualified & approved/licensed electrical personnel
and conform to all local authority requirements. All overload devices,
fuses or other protective devices must be rated to suit motor running
& starting characteristics.
Initial Start-up:
1. Insulation resistance test - minimum value should be 1 Mega
Ohm (1,000,000 Ohms).
2. Thermistors, if fitted, should be checked for continuity with a
multimetre but never mega-tested.
3. Ensure supply voltage and frequency correspond to the motor
nameplate rating.
4. Ensure shaft turns freely.
5. Wire the motor in accordance with the wiring diagram as shown
on the motor nameplate and/or in the motor terminal box.
6. Turn on unit and check amp draw does not exceed nameplate rating.
Note: If unit is not run for a prolonged time (or motor is stored with
tower in kit form) the motor insulation should be checked with a
“megger” insulation tester prior to starting the motor. If motor is
stored it should be in a clean, dry place & have the shaft rotated
occasionally. Storage areas should not be subject to vibration.
Inspection and Maintenance
• Clean the outside of the motor at least quarterly to ensure proper
motor cooling.
• After prolonged shutdowns, check the motor insulation with an
insulation tester prior to restarting the motor.
• Check motor voltage and current following start-up and every three
months while in operation.
Adjustable Motor Base
Coat the motor base slides and adjusting screws prior to start-up, every
three months while in operation, and following shutdown. Use good
quality corrosion inhibiting grease such as one of those recommended
for lubricating the fan shaft bearings.
WARNING: Electricity is
dangerous and has the potential
to cause fatal injury. Work of any
nature involving electricity must
only be carried out by licensed
electricians, who must take
all the appropriate/regulated
safety precautions prior to
commencement of such work.