Fan Motors - BAC HXV Operation & Maintenance Manual

NOTICE: Ensure the controls for
the fan and pump motors are set
to allow a maximum of six on-off
cycles per hour to prevent motor
overheating.
DANGER: Rotating equipment
will cause severe personal injury
or death to persons who come in
contact. Do not perform any service,
maintenance, or inspection on or
near the fans, motors, and drives,
or inside the unit without first
ensuring that the fans and pump
motors are disconnected, locked
out, and tagged out.
16
WWW. B A LT IM ORE A IRCOIL.COM

Fan Motors

HXV Hybrid Coolers use cooling tower inverter duty, premium efficient, totally enclosed,
single-speed, single-winding, reversible ball bearing type motor(s).
Inspection & 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 (BALTIDRIVE
Coat the motor base slides and adjusting screws (refer to Figure 3 on page 8) 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.
Fan Motor Removal Instructions
If the motor has to be removed, follow the instructions below:
• Lockout and tag out fan and pump motors before entering the unit.
• Disconnect wiring from fan motor.
• Using the motor base adjusting screw, relieve tension from the drive belt and
remove belt
• Rotate the davit arm over the motor using 3/4" socket or wrench on the hex head
on the bottom of the davit.
• Attach a suitable lifting device of sufficient load capacity to the eye hook on the
davit arm.
• Attach the other end of the lifting device to the factory supplied lifting points which
are mounted on the motor. Verify that the lifting device is secure at all attachment
points.
• Position the lifting device to take up any slack, and to support the weight of the
motor with minimal movement when the motor mounting hardware is removed.
• Carefully loosen and remove motor mounting hardware.
• Remove the hardware and clips which fasten the removable grating section directly
below motor.
• Remove the grating section directly below the motor.
• Lower motor down to the internal walkway and remove the motor through unit
access door.
Fan Motor Installation Instructions
• Lock out and tag out fan motor, fan motor power supply, and pump motors before
entering the unit.
• Attach a suitable lifting device of sufficient load capacity to the eye hook on the
davit arm.
Power Train Only)
®
(For Units with the Motor Removal System Option)
(For Units with the Motor Removal System Option)