Energy Tech Laboratories RSIB 300-500 manual Checking and Changing Rotation of Rsib 350, 400

3002503 11.06

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

to see the cooling vanes, but it is difficult to see the rotation unless the 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

VARIABLE FREQUENCY
DRIVE (typical)	WEATHERPROOF BOX
L1 L2 L3 U V W

FAN

MOTOR

BLACK BLACK RED GREEN

POWER SUPPLY 200-240/3/60

or SWAP THESE WIRES - 440-480/3/60

ON THE OUTPUT SIDE!

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