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12
3002503 11.06
BLACK
BLACK
RED
GREEN
POWER SUPPLY
200-240/3/60
or
440-480/3/60
WEATHERPROOF BOX
VARIABLE FREQUENCY
DRIVE (typical)
FAN
MOTOR
L1 L2 L3 U V W
SWAP THESE WIRES -
ON THE OUTPUT SIDE!
4.6 Checking and Changing Rotation of RSIB 350, 400, and 500
To check the rotation of the impeller, it is necessary to be able to
see the impeller or the rotation of the cooling vanes at the end of the
motor housing.
Standing in front of the fan with the motor pointing towards you, the
rotation must be clockwise. This is indicated by an arrow on the
motor end cover. There are holes in the end cover that allow you
toseethecoolingvanes,butitisdifculttoseetherotationunlessthe
fan is running very slowly.
For a more precise determination, you may also see down inside the
fan housing, as shown in Fig.13. The arrow shown
(not actually inside fan housing) shows the proper rotation.
It is possible for the fan to operate with improper rotation. However,
although some performance can be seen the fan will probably
only provide 25-30% of full capacity. Improper rotation wears on the
motor, and causes various electrical faults at the Variable Frequency
Drive.
Fan rotation can be changed by swapping the two phase wires as
shown on the wiring diagram in Fig.14.
Fig. 13
Fig. 14