Greenheck Fan 470654 manual Troubleshooting, Blower Does Not Operate

Page 22

Troubleshooting

Blower Does Not Operate

Proper supply power at

No

 

 

main disconnect

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

24 VAC between

No

 

terminals R and X?

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

24 VAC between

No

 

terminals G and X?

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

24 VAC across

No

 

terminals 3 and X?

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

24 VAC across

No

 

terminals 4 and X?

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

24 VAC across A2 and A1 on

No

 

supply contactor (ST1)

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22Model VSU Make-Up Air

Check main voltage.

Reference: Start-Up - Blower, Check the Voltage, pg. 14

Main disconnect (DS1) off.

Turn main disconnect (DS1) on.

Primary fuses blown.

Replace fuses.

Main transformer (TR1) defective.

Replace transformer.

Supply switch (S2) off.

Turn supply switch (S2) on.

Fire system contact (FSC) tripped/not installed.

Correct, replace.

Supply fan overload (ST1 OL) tripped.

Reset and check motor amps.

Reference: Start-Up - Blower, Motor Check, pg. 14

Optional exhaust fan interlocks (ST2-ST5) open.

Correct, replace.

(Optional) freeze protection (RT4) tripped.

Reset.

(Optional) damper limit switch (DL1) holding. Wait for actuator to open fully or adjust limit switch.

(Optional) damper limit switch jumper missing.

Install jumper, reference the units ladder diagram for terminals.

Fan relay (RF) is not energized.

Check for loose connection. Repair or replace relay.

Broken fan belt.

Replace.

Reference: Maintenance - Routine, V-Belt Drives, pg. 31

Defective motor or capacitor.

Repair, replace.

Blown motor fuse.

Replace.

One or more legs of three-phase is out.

Restore missing legs.

At this time the supply contactor (ST1) should pull in, passing power to the supply motor and the blower should start.

®

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Contents Installation, Operation and Maintenance Manual Model VSU General Safety InformationUnpacking Inspection and Maintenance during StorageReceiving HandlingTable of Contents Product Overview SubassembliesBurner, Blower and Control Center Section Open ViewControl Center Burner SubassemblyDampers Installation Installation of Optional Service Platform Complete InstallationService Platform Material List Assembly Figure CInstallation of Electrical Wiring Install Additional Regulator if Required Installation of Direct Gas PipingDetermine the Supply Gas Requirements Installation of Building Pressure Control optional Unit Model Number Start-Up ChecklistCheck blower rotation Check for vibration Supply fan RPM Start-Up Blower Set-Up Optional Components Check the Optional High and Low Gas Pressure SwitchesStart-Up Direct Gas Check the Supply Gas PressureSet the Maximum Firing Rate Maximum firing rate adjustmentSet the Burner Air Pressure Differential Measuring the Pressure DropRegulators and Modulating Valves Set the Minimum Firing RateFlame Signal Check Pilot Ignition Set the Unit’s Operating TemperatureMaxitrol Series 44 9 Terminals The Maxitrol Speed Variable Volume OperationOperation VAV Units optional ModulatingRecirculation Operation Operation Recirculating Units optionalOperation Electrical Electrical Sequence Exhaust Fan Contact S1 Closed optional3b. Heat Contact S4 Closed Direct Spark Flame Safeguard FSG Sequence3a. Heat Contact S4 Closed Pilot Ignition Heat Contact ClosedTroubleshooting Blower Does Not OperateMotor Overamps Insufficient Airflow Too Much AirflowExcessive Noise or Vibration Heater Does Not Operate Pilot Ignition Does not attempt to light No visible sparkAttempts to light, but no pilot visible spark Visible pilot Between 0.625 and 0.675 in. WC?Heater Does Not Operate Direct Spark Attempts to light, but no flame Visible spark Motors Maintenance RoutineBelt Drives WheelsMaintenance Fall Reference Typical Gas Train Layout with Direct Spark Ignition Heat Relay allows power to pass to heating controls Dirty Filter SwitchFan Relay allows power to pass to energize motor starter Control Center LayoutWarranty Maintenance LogDateTime AM/PM

470654 specifications

Greenheck Fan 470654 is a cutting-edge ventilation solution designed to meet the demanding requirements of commercial and industrial applications. Renowned for its reliability and efficiency, this fan model integrates advanced technologies and engineering to provide optimal air movement and control.

One of the standout features of the Greenheck Fan 470654 is its robust construction. Designed with high-quality materials, the fan promotes longevity and durability, making it suitable for use in tough environments. This fan features a heavy-gauge steel housing that minimizes vibration and enhances noise reduction, contributing to a quieter operation, a critical factor in maintaining a serene working environment.

The fan is equipped with a powerful motor that ensures efficient airflow, achieving high performance while consuming minimal energy. This energy efficiency is emphasized through the use of advanced motor technology, including variable frequency drive (VFD) compatibility. VFDs allow for precise control of the fan speed, enabling adjustments based on system demand, thus significantly reducing energy consumption and operating costs.

In terms of airflow performance, the Greenheck Fan 470654 is engineered to provide a high volume of air movement while maintaining static pressure. Its aerodynamic design minimizes resistance, enhancing overall efficiency. The fan is designed to operate across a range of static pressures, making it versatile for different applications, from commercial kitchens to large manufacturing facilities.

Additionally, the fan's installation is straightforward, thanks to its user-centric design. The model incorporates mounting brackets and options for various duct configurations, ensuring seamless integration into existing systems. Maintenance is also made easier with accessible components, allowing technicians to perform regular checks and upkeep without extensive downtime.

Safety features are a priority in the design of the Greenheck Fan 470654. It includes protective features such as thermal overload protection to prevent motor damage and extend operational life. The fan's design also adheres to industry standards and regulations, providing peace of mind for users.

In summary, the Greenheck Fan 470654 is a well-engineered solution that combines durability, efficiency, and advanced technology to deliver superior performance in ventilation applications. With its powerful motor, energy-saving capabilities, and ease of installation and maintenance, it stands out as a reliable choice for professionals seeking optimal airflow management.
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