Important

Setting the maximum firing rate during mild weather conditions may cause the high limit to trip out during extreme conditions requiring manual resetting.

note

Gas trains are equipped with either separate regulators and modulating valves or with a combined modulating valve.

note

Clockwise rotation increases the temperature rise, counterclockwise rotation decreases the temperature rise.

note

The minimum setting for the maximum firing rate may be higher than required. This is acceptable. The burner will modulate as needed.

Regulators and Modulating Valves

Set the Minimum Firing Rate

Disconnect and isolate one of the wires running to the modulating valve to send the unit to its minimum firing rate. Set the minimum firing rate by adjusting the needle valve indicated.

After setting the minimum firing rate, shut off the pilot to ensure that the flame safeguard can still read the main flame signal. Reconnect the wire to the modulation valve and open the pilot shut-off valve.

IMPORTANT

The proper minimum firing rate setting results in a small ribbon of continuous flame which covers the flame rod and runs across the entire burner.

Important

Do not allow the disconnected wire to come in contact with a potential ground. Damage to the amplifier or transformer could result.

Important

On units with a 42 inch or greater burner, the flame

Remove cap to access maximum firing rate adjustment

Remove one wire to send the unit to the minimum firing rate

Minimum firing rate adjustment

safeguard will automatically shut off the pilot after the burner has been ignited.

NOTE

Gas trains are equipped with either separate regulators and modulating valves or with a combined modulating regulator.

NOTE

Adjusting the maximum and minimum firing rate requires the inlet air sensor to be set higher than the outdoor air temperature in order to start the burner(s). Once high and low fire have been set, the inlet air sensor should be set to the desired temperature.

Separate Regulator and Modulating Valves

Minimum firing

 

 

 

Maximum firing

 

 

rate adjustment

 

rate adjustment

Remove one wire to send the unit to the minimum firing rate

Combined Modulating Regulator

NOTE

Counterclockwise rotation increases the minimum fire rate setting, clockwise rotation decreases the setting.

Model VSU Make-Up Air 17

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Greenheck Fan 470654 manual Regulators and Modulating Valves, Set the Minimum Firing Rate
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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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