Troubleshooting

Heater Does Not Operate (Pilot Ignition)

Attempts to light, but no pilot (visible spark)

Check inlet gas pressure.

Reference: Start-Up - Direct Gas,

Check the Supply Gas Pressure, pg. 27

Yes

Gas pressure between the

minimum and maximum shown

on the direct gas label?

Air in the gas line?

No

Check for proper airflow.

Reference: Start-Up - Direct Gas,  Set the Burner Air Pressure Differential, pg. 16

Yes

Pressure drop across the burner between 0.625 and 0.675 in. WC?

Yes

Proper spark?

Yes

Check for proper pilot pressure.

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

No

Pilot pressure correct?

Yes

No

Yes

No

No

No

Note: The minimum and maximum gas pressures for your unit are shown on the direct gas label.

Reference: Start-Up - Direct Gas, Check the Supply Gas Pressure, pg. 27

Correct gas pressure.

Reference: Start-Up - Direct Gas, Check the Supply Gas Pressure, pg. 27

Purge gas line.

Verify gas at the pilot.

Note: The airflow may satisfy the airflow switch, but may make lighting the pilot difficult. Adjust the pressure drop across the burner between 0.625 and 0.675 in. WC Reference: Start-Up - Direct Gas, 

Set the Burner Air Pressure Differential, pg. 16

Adjust burner baffles.

Reference: Start-Up - Direct Gas, 

Set the Burner Air Pressure Differential, pg. 16

Crossed flame and spark wires.

Uncross wires and reconnect.

Incorrect spark plug gap.

Set spark plug gap to 0.062 inches.

Defective spark plug.

Replace spark plug.

Note: A high pilot pressure will make lighting more difficult. Lower the pilot pressure in increments until the unit lights.

Then set the pilot per the instruction.

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

Adjust the pilot pressure.

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

With proper airflow, gas pressure and spark,

the unit should light.

If problems remain, consult the factory.

Model VSU Make-Up Air 27

®

Page 26 Page 28
Page 27
Image 27
Greenheck Fan 470654 manual Attempts to light, but no pilot visible spark
Page 26 Page 28

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.
Top Page Image Contents