Check pulleys and belts for proper alignment to avoid unnecessary belt wear, noise, vibration and power loss. Motor and drive shafts must be parallel and pulleys in line (see FIGURE 16).

FAN RPM

The adjustable motor pulley is preset at the factory to the customer specified RPM. Fan speed can be increased or decreased by adjusting the pitch diameter of the motor pulley. Multi-groove variable pitch pulleys must be adjusted an equal number of turns open or closed. Any increase in fan speed represents a substantial increase in load on the motor. Always check the motor amperage reading and compare it to the amperage rating shown on the motor nameplate when changing fan RPM. Access these components through the labeled access panels.

All access doors must be installed except the control center door. To measure the fan rpm, the blower door will need to be removed. Minimize measurement time because the motor may overamp with the door removed. Do not operate units with access doors/panels

WRONG

WRONG

WRONG

CORRECT

open or without proper ductwork in place as the motors will overload.

FIGURE 16

ENERGY RECOVERY WHEEL

CAUTION: See **WARNING** on page 1 and 15

For the HRE-20 and HRE-45, open the access door marked "Energy Wheel Cassette Access". UNPLUG the wheel drive motor and remove the metal spacer. Then pull the cassette out halfway as seen in FIGURE 17.

Note: For the HRE-55 and HRE-90, the energy recovery wheel does not slide out due to its size and weight. There is ample room inside the unit to perform energy recovery wheel servicing.

Turn the energy recovery wheel by hand to verify free operation. Check that the air seals, located around the outside of the wheel and across the center (both sides of wheel), are secure and in good condition. Replace cassette into unit, plug in wheel drive, replace access door and apply

power. Observe that the standard and high flow wheelFIGURE 17 rotates freely at about 60 RPM.

If wheel does not rotate or rotates too slowly, remove the

cassette (following the instruction on page 20). Air seals, which are too tight, will prevent proper rotation of the energy recovery wheel. Recheck the air seals for tightness. Air seal clearance may be checked by placing a sheet of paper, to act as a feeler gauge, against the wheel face. To adjust the air seals, loosen all eight seal retaining screws. These screws are located on the bearing support that spans the length of the cassette through the wheel center. Tighten the screws so the air seals tug slightly on the sheet of paper.

COILS

Leak test thermal system to insure tight connections.

16

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Page 16
Image 16
Greenheck Fan HRE-20, HRE-90, HRE-45, HRE-55 manual Fan Rpm, Energy Recovery Wheel, Coils
Page 15 Page 17

HRE-55, HRE-45, HRE-90, HRE-20 specifications

The Greenheck Fan HRE series, specifically the models HRE-20, HRE-90, HRE-55, and HRE-45, represents a blend of innovation and efficiency in the HVAC industry. Built for both commercial and industrial applications, these exhaust fans stand out due to their robust design and advanced operational features.

One of the main features of the HRE series is its energy-efficient motor design. These fans come equipped with a premium efficiency motor that reduces energy consumption while maintaining high performance. The motors are specifically designed to provide exceptional airflow while operating at lower sound levels, ensuring a quieter environment.

The HRE models also showcase advanced aerodynamic design, featuring optimized blade geometry that enhances airflow performance. This design ensures that the fans can deliver consistent and effective air movement even at varying operational conditions. This makes the HRE series suitable for use in a wide range of applications, from commercial kitchens to industrial processes.

Another significant characteristic of the HRE series is its durability. Constructed from high-quality materials, these fans are built to withstand harsh environmental conditions and prolonged usage. The robust casing and corrosion-resistant finishes ensure longevity, reducing the need for frequent repairs or replacements.

In terms of installation and maintenance, the HRE series offers significant advantages. The fans are designed for easy installation with clear mounting instructions. Additionally, maintenance procedures are simplified, allowing for hassle-free access to critical components, which reduces downtime and operating costs.

Technologically, the HRE models incorporate advanced controls and monitoring systems. These systems can offer real-time feedback on operational performance, allowing for proactive maintenance and energy management. Integrated controls can be customized to work with building management systems, providing users with seamless integration and control capabilities.

Overall, the Greenheck Fan HRE-20, HRE-90, HRE-55, and HRE-45 exemplify a commitment to quality and efficiency in commercial and industrial ventilation solutions. Their combination of energy efficiency, advanced design, durability, and user-friendly features make them a leading choice for those seeking reliable airflow solutions. These fans not only meet current industry standards but also set a benchmark for performance and innovation in the HVAC sector.
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