Greenheck Fan VSU Make-Up Air Unit with Direct-Fired Gas Heater 470654 - Manual (Page 23)

23 Model VSU Make-Up Air
®
Motor Overamps
Troubleshooting
Air volume too high?
Adjust drives or increase external
static pressure as needed.
Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14
Motor horsepower too low?
Resize motor.
Motor voltage correct?
Provide proper power supply.
Reference: Start-Up - Blower, Check the Voltage, pg. 14
Blower rotation correct?
Reverse blower rotation.
Reference: Start-Up - Blower, Check the Blower Rotation
Actual static pressure
lower than design?
Adjust drives to reduce blower RPM.
Reference: Start-Up - Blower, Air Volume Measurement and Check, pg. 14
No
No
Yes
Yes
Yes
Yes
No
Yes
No
No
Shorted windings in motor?
Replace motor.
Yes
Everything is working
properly, consult factory.
Yes