Greenheck Fan 470654 manual Heater Does Not Operate Pilot Ignition

Page 26

Troubleshooting

Heater Does Not Operate (Pilot Ignition)

Does not attempt to light (No visible spark)

24 VAC between

terminals W1 and X?

Yes

115 VAC between

terminals 102 and 101?

Yes

115 VAC between

terminals 103 and 101?

Yes

115 VAC between

terminals 104 and 101?

Yes

115 VAC between

terminals 106 and 101?

Yes

Continuity between

terminals 107 and 108?

Yes

No

No

No

No

No

No

Heat switch (S4) off.

Turn heat switch (S4) on.

Heat switch not wired.

Wire heat switch (S4).

Primary fuses blown.

Replace fuses.

Main transformer (TR4) defective.

Replace transformer.

(Optional) inlet air sensor (TS4) holding.

Adjust TS4 setting.

Reference: Start-Up - Blower, Set-Up Optional Components, pg. 15

Heat relay (RH) defective.

Replace heat relay (RH).

The power light on the flame safeguard should

blink approximately every 5 seconds as it

performs a self-diagnostics check.

High limit (HLC1) tripped.

Reset or replace high limit (HLC1).

Check on cause of control loss.

(Optional) high/low gas pressure switch(es)

(PS3 and PS4) tripped.

Correct gas pressure and reset.

Reference: Start-Up - Direct Gas, Check the Pilot Gas Pressure, pg. 15

Airflow switch (PS2) holding for proper airflow.

Correct airflow across burner.

Reference: Start-Up - Direct Gas,

Check the Optional High and Low Gas Pressure Switches, pg. 15

At this time the heater should attempt to light.

The pilot light on the flame safeguard should illuminate.

26Model VSU Make-Up Air

®

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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 ViewDampers Burner SubassemblyControl Center Installation Service Platform Material List Complete InstallationInstallation of Optional Service Platform Assembly Figure CInstallation of Electrical Wiring Determine the Supply Gas Requirements Installation of Direct Gas PipingInstall Additional Regulator if Required Installation of Building Pressure Control optional Check blower rotation Check for vibration Supply fan RPM Start-Up ChecklistUnit Model Number 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 RateMaxitrol Series 44 9 Terminals The Maxitrol Set the Unit’s Operating TemperatureFlame Signal Check Pilot Ignition 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 LayoutDateTime AM/PM Maintenance LogWarranty

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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