Greenheck Fan Part #470655 Motor Overamps, Troubleshooting, Reference Blower Start-Up- Step #5

Page 18

Troubleshooting

Motor Overamps

Air volume too high?

Actual static pressure

lower than design?

Blower rotation correct?

Yes

Motor voltage correct?

Yes

Motor horsepower too low?

Shorted windings in motor?

Yes

Everything is working

properly, consult factory.

Yes

Adjust drives or increase external static pressure as needed.

(Reference Blower Start-Up – Step #5)

Adjust drives to reduce blower RPM.

Reverse blower rotation.

(Reference Blower Start-Up – Step #2)

Provide proper power supply.

(Reference Blower Start-Up – Step #1)

Resize motor.

Replace motor.

18 DGX Industrial Space Heating

Image 18

Contents If you smell gas 1.Open windows General Safety Information2.Do not touch electrical switches 3.Extinguish any open flameUnpacking Inspection and Maintenance during StorageReceiving HandlingInstallation Table of ContentsClearance to Combustibles / Service Clearances Troubleshooting2. Install Unit Installation of Indoor Unit1. Install Hangers 3. Seal Wall Opening2. Install Ductwork Installation of Arrangement DB / HZ1.Install Curb and/or Equipment Supports 4. Install Unit2. Install TSCP Installation of Diffuser and Remote Panel TSCP1. Install Diffuser Airflow3.Connect the Main Power Installation of Electrical Wiring1.Determine the Size of the Main Power Lines 4. Wire the Optional Convenience Outlet1.Determine the Supply Gas Requirements Installation of Gas Piping2.Install Additional Regulator if Required 3. Connect the Supply Gas Line5. Test the System for Leaks Start-Up- Blower4. Pipe the Optional Vent Line Pre Start-UpCheck3. Check for Vibration 5.Air Volume Measurement and Check2.Check the Blower Rotation 4. Motor Check1. Check the Supply Gas Pressure Start-UpDirect GasStart-UpDirect Gas • 100% Outside Air 4a. Set the Burner Air Pressure Differential5. Set the Low Fire Time Delay Start-UpDirect Gas 50/50 Recirculation4b. Set the Burner Air Pressure Differential 6. Set the Maximum Firing Rate7. Set the Minimum Firing Rate Start-UpDirect Gas continuedRegulators and Modulating Valves 8. Set Daytime Temperature10.Program the 7 Day Time Clock 11.Flame Signal Check9. Set Nighttime Temperature Flame Signal Check2.Switch S2 in Winter Mode Without 7-DayTimer1.Switch S2 in Summer Mode 3.Flame Safeguard FSG Sequence2.Switch S2 in Winter Mode Operation - Electrical Sequence With 7-DayTimer1.Switch S2 in Summer Mode 3.Flame Safeguard FSG SequenceTurn Supply Switch S2 On TroubleshootingBlower Does Not Operate ResetReference Blower Start-Up- Step #5 Motor OverampsTroubleshooting Reference Blower Start-Up- Step #2Troubleshooting Insufficient AirflowToo Much Airflow Reference Filters in the Maintenance sectionExcessive Noise or Vibration TroubleshootingReference Bearings in the Maintenance section Turn Heat Switch S4 On Heater Does Not OperateTroubleshooting Wire Heat Switch S4If problems remain, consult the factory TroubleshootingUncross wires and reconnect Heater Does Not OperateHeater Does Not Operate TroubleshootingAdjust drives as needed Reference Direct Gas Start-Up- Step #11Motors Maintenance - RoutineSnow Accumulation WheelsBearings FiltersBurner Maintenance - FallHigh Limit Gas TrainReference Typical Gas Train Layout 400 – 800 MBHDGX Industrial Space Heating Reference Dirty Filter SwitchTypical Control Center Layout 28 DGX Industrial Space HeatingTypical setting varies Start-UpChecklistTypical setting 5 minutes 45ºF ReferenceMaintenance Log Maintenance Log Warranty Copyright 2012 Greenheck Fan Corporation