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Before any disassembly, fan blades and hub should be match marked to ensure proper blade pitch angle
when reassembled.
No service work should be performed on or near the fans, motors, and drives or inside the unit
without first ensuring the fan and pump motors have been isolated, tagged and locked in the off
FAN MOTOR
The standard fan motor for this line of units is a TEFC (Totally Enclosed Fan Cooled) motor. The motor with frame
size smaller or equal than 200L has permanently lubricated ball bearings and special moisture protection on the
bearings, shaft and windings. The only servicing required during operation is to clean the outside surface of the
motor at least quarterly to ensure proper motor cooling. After prolonged shutdowns, the motor insulation should be
checked with a "Megger" insulation tester before restarting the motor.
Do not wash down the motor unless it is IP66 rated. On a quarterly basis check:
•
electric connections
•
motor protection devices
•
amp draw
•
motor bearings for noise/overheating
•
motor holding bolts
•
external surface of motor for corrosion
If the motor is equipped with space heaters, these must be activated when the motor is idle in order to prevent
condensation inside the motor.
Do not run/start the fan motor(s) when there is no heat load.
SPRAY WATER PUMP
The BAC pump contains a mechanical seal between pump housing and pump motor. This seal needs to be
checked quarterly for proper operation and replaced if necessary.
5 Maintenance Procedures
5 Maintenance Procedures
CAUTION
position.
CAUTION
W W W . B A L T I M O R E A I R C O I L . E U
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