Grain Systems Bin Accessories PNEG-524 - Manual (Page 27)

PNEG-524 Roof Exhaust Fan 27
8. Operating Instructions
Before Starting Fan
When starting the fan for the first time, check the following:
1. With the power OFF, rotate the fan blade to make sure it revolves easily and does not rub on the
venturi or fan tube.
2. Check all the fasteners to make sure they are tight. If any are loose, check for proper clearance
and retighten.
3. With the power OFF, check all electrical connections to make sure they are tight. Inspect the current
carrying wires to make sure they are not grounded. Make sure the fan and disconnect are grounded.
All control enclosure covers and access doors should be secured in place.
4. Refer to the wiring diagram on the motor and make sure the motor is wired correctly.
Starting the Fan
The roof exhaust fans should operate anytime the supply fans operate. The roof fans can operate
independently of the supply fans just to provide ventilation of the attic space, but this requires that vents
be used in the roof to provide an open area.
18" Fan............4 square feet per fan
24" Fan...........10 square feet per fan
Fan Shut Off
When shutting the fan down for the season, shut off the power at the fan disconnect rather than at the fan
controls to provide additional protection from unauthorized personnel operating the fan and potential
damage to the fan from a lightning strike.
Off Season Operation and Maintenance
During the off season, the fan blade should be allowed to turn freely. The fan should operate for
approximately 30 minutes every three (3) weeks. This helps keep the fan lubricant more evenly distributed
within the bearing cavity and dries out any condensation that could be in the motor.
Fan Service
When servicing the fan, switch power OFF at the fan disconnect switch. Activate power only when a check
is made. The following items will help pinpoint a possible malfunction of the fan unit and explain the
corrective action to take.
If the motor controller is turned ON and nothing happens, check the following:
1. Make sure power is available to the fan unit.
2. Check the motor thermostat (if present) to determine if the thermostat is open or closed. If the
thermostat is open, take the motor to the local authorized service center. When checking the
thermostat, make sure the motor has time to cool, if hot.
3. If power is available to the motor and it does not run, remove the motor and take it to an authorized
motor service center for repair or replacement.