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PowerFlo™ Fans |
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Check to see that all hardware is tight and the fan rotates freely by hand before starting the fan.
Make sure all guards are in place and that proper procedures are followed for removing any look out devices.
"Bump" the fan motor and verify the direction of fan rotation is correct.
Start the fan and watch both the fan and the fan ring as the fan comes up to speed. If any contact or excessive movement of the fan ring is observed, shut the fan off immediately and correct the cause of the problem. Allow the fan to operate several minutes so the fan drive system stabilizes.
Check the fan speed and the fan motor power consumption. When checking the power on an electric fan motor, be sure to measure the voltage and the motor current. Checking the motor amperage only may give a false power indication since high or low voltage affects the amperage of the motor at a constant load condition.
Caution - Obtaining amperage and voltage readings on an electric motor may require defeating the safety features of electrical enclosures. Please seek the assistance of a qualified electrician and follow all applicable safety precautions.
The HP value provided in the fan specifications is the HP required at the fan shaft to meet the specified air flow and static pressure requirements. The motor output HP required will be higher than the specified fan HP because of losses in the gear drive or belt drive. The actual fan HP may increase at temperatures lower than those used for the selection and rating of the fan due to changes in the density of the air moving through the fan.
Consult the factory if the difference between the measured HP of the motor and the specified fan HP seems excessive. Minor adjustments in pitch to achieve the desired fan HP are normal due to variations in equipment, fan ring geometry and tip clearances.
Warning - Do not increase the fan operating speed above the RPM listed in the fan specifications without first consulting the factory. Operating the fan at excessive speeds may shorten the life of the fan significantly.
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