Greenheck Fan 470654 manual 3a. Heat Contact S4 Closed Pilot Ignition, Heat Contact Closed

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•Power passes to N.C. supply overload contact

(ST1 OL)

•Power passes through N.C. contact on optional freeze protection timer (RT4) which remains closed if the temperature has remained above the set point

•Power passes to optional inlet damper which opens

•When damper is fully opened, damper relay

(D1) is energized and optional N.O. damper limit switch (DL1) closes

•Power passes to and energizes supply starter relay (RF)

•Power passes to N.O. fan contact (RF), which is energized and closed

•Supply starter (ST1) is energized

•Supply starter contact (ST1) closes and power reaches and energizes supply fan

•Supply fan (M1) starts

3a. Heat Contact (S4) Closed - Pilot Ignition

•Power passes to N.O. fan relay (RF) which is energized and closed

•Power passes to optional inlet air sensor contact

(TS4) which is energized and closed if the inlet air temperature is below the set point

•Power passes to and energizes the heat relay

(RH)

•N.O. heat relay contact (RH) closes

•Power passes to and energizes terminal 5 of the

Flame Safeguard (FSG). Power light on FSG is on.

•Power passes to N.C. high limit control contact

(HLC1) which is closed if temperature has remained below set point

•Power passes to optional N.O. and N.C. high and low gas pressure contacts (PS4 and PS3), which are both closed if gas pressure is within the set range

•Power passes to terminal 6 of the Flame

Safeguard (FSG)

•Power begins direct gas burner sequence

(see Direct Gas Burner Sequence)

3b. Heat Contact (S4) Closed - Direct Spark

•Power passes to N.O. fan relay (RF) which is energized and closed

•Power passes to optional inlet air sensor contact

(TS4) which is energized and closed if the inlet air temperature is below the set point

•Power passes to and energizes the heat relay

(RH)

•N.O. heat relay contact (RH) closes

•Power passes to N.C. high limit control contact

(HLC1) which is closed if temperature has remained below set point

•Power passes to optional N.O. and N.C. high and low gas pressure contacts (PS4 and PS3), which are both closed if gas pressure is within the set range

•Power passes to N.O. and N.C. airflow switches

(PS2) which are closed if there is proper airflow across the burner

•Power passes to terminal TH on the Flame

Safeguard (FSG) which begins it’s sequence (see Direct Gas Burner Sequence)

Direct Gas Burner Sequence - Pilot Ignition

1.Supply Fan Contact Closed

•Power passes to the supply fan and heat switch

2.Heat Contact Closed

•Power passes to the heat relay then to the Flame

Safeguard

3.Flame Safeguard (FSG) Sequence

•Checks for proper airflow

•Verifies no flame present at burner

•Initiates 10 second prepurge

•Sends power to open pilot gas valve (V1) and energizes the spark generator (SG) (clicking of the spark generator may be heard)

•Tries for up to 10 seconds to light pilot and confirm flame

•Powers the main gas valves open

•Shuts down spark generator

•Continuously monitors the flame and airflow

•Performs self-diagnostic check every five seconds.

Direct Gas Burner Sequence - Direct Spark

1.Supply Fan Contact Closed

•Power passes to the supply fan and heat switch

2.Heat Contact Closed

•Power passes to the heat relay then to the Flame

Safeguard

3.Flame Safeguard (FSG) Sequence

•Checks for proper airflow

•Verifies no flame present at burner

•Initiates 15 second prepurge

•Sends power to open gas valve (V2) and energizes the spark generator (clicking of the spark generator may be heard)

•Tries for up to 10 seconds to light and confirm flame

•Shuts down spark generator

•Continuously monitors the flame and airflow

Model VSU Make-Up Air 21

®

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Contents Model VSU General Safety Information Installation, Operation and Maintenance ManualReceiving Inspection and Maintenance during StorageUnpacking HandlingTable of Contents Subassemblies Product OverviewOpen View Burner, Blower and Control Center SectionBurner Subassembly Control CenterDampers Installation Complete Installation Installation of Optional Service PlatformService Platform Material List Figure C AssemblyInstallation of Electrical Wiring Installation of Direct Gas Piping Install Additional Regulator if RequiredDetermine the Supply Gas Requirements Installation of Building Pressure Control optional Start-Up Checklist Unit Model NumberCheck blower rotation Check for vibration Supply fan RPM Start-Up Blower Start-Up Direct Gas Check the Optional High and Low Gas Pressure SwitchesSet-Up Optional Components Check the Supply Gas PressureSet the Burner Air Pressure Differential Maximum firing rate adjustmentSet the Maximum Firing Rate Measuring the Pressure DropSet the Minimum Firing Rate Regulators and Modulating ValvesSet the Unit’s Operating Temperature Flame Signal Check Pilot IgnitionMaxitrol Series 44 9 Terminals The Maxitrol Operation VAV Units optional Variable Volume OperationSpeed ModulatingOperation Electrical Operation Recirculating Units optionalRecirculation Operation Electrical Sequence Exhaust Fan Contact S1 Closed optional3a. Heat Contact S4 Closed Pilot Ignition Flame Safeguard FSG Sequence3b. Heat Contact S4 Closed Direct Spark Heat Contact ClosedBlower Does Not Operate TroubleshootingMotor Overamps Too Much Airflow Insufficient AirflowExcessive Noise or Vibration Does not attempt to light No visible spark Heater Does Not Operate Pilot IgnitionAttempts to light, but no pilot visible spark Between 0.625 and 0.675 in. WC? Visible pilotHeater Does Not Operate Direct Spark Attempts to light, but no flame Visible spark Belt Drives Maintenance RoutineMotors WheelsMaintenance Fall Reference Typical Gas Train Layout with Direct Spark Ignition Fan Relay allows power to pass to energize motor starter Dirty Filter SwitchHeat Relay allows power to pass to heating controls Control Center LayoutMaintenance Log WarrantyDateTime 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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