The Turbo Air® 3000 Centrifugal Compressor Compressor Handbook

Installation
Main Drive Motor Rotation Verification
Before coupling the compressor and main drive motor, it is necessary to verify that the phase sequence
wiring will provide the correct rotation direction.
To verify correct rotation, follow this sequence:
1. Verify that motor fastening bolts are properly torqued as listed in Section Two, Compressor Specifications.
2. Verify that the rating voltage and frequency shown on the motor nameplate match the power
supply.
3. Carefully follow all of the motor manufacturer’s instructions (provided under separate cover)
regarding preparation and installation.
4. “Bump” (energize and quickly de-energize) the motor so that the shaft rotates only a few revolutions,
and verify the direction of rotation using the directional arrow on the compressor gearbox
cover.
5. If required, change the phase wiring to reverse the direction of rotation.
Oil Pump Motor Rotation Verification
This inspection is required to ensure that the oil pump will generate the required pressure during
startup and subsequent operation.
Confirm the correct rotation of the oil pump motor as follows:
1. Note the arrow indicating the correct rotation direction on the mounting flange between the pump
and the motor.
2. Turn on the oil pump motor and observe the rotation direction of the motor fan. (The correct
rotation is clockwise, as indicated by the arrow.)
3. If the rotation of the motor fan is not clockwise, correct the pump rotation by interchanging two of
the three power phases connected to the motor.
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