INSTALLATION (continued)

ELECTRICAL CONNECTIONS

The electrical supply must be compatible with that shown on the nameplate: voltage, phase, and amperage capacity. The electrical supply line must be properly fused and conform to local and national electrical codes.

All internal electrical components are pre-wired at the factory. Field electrical connections only need to be made inside the unit to the main disconnect (See FIGURE 5, Item #1) and the 24 volt control circuit (See FIGURE 5, Item #7). A door interlocking safety disconnect is provided as standard feature.

Note: Standard factory installed electric post heaters have their own disconnect separate from the unit disconnect. Thus, electric post heaters require a separate power connection.

IMPORTANT: Use minimum 14 ga. wire for 24 volt control power.

Control wire resistance should not exceed 0.75 ohms (approximately 285 feet total length for 14 ga. wire; 455 feet total length for 12 ga. wire). If wire resistance exceeds 0.75 ohms, an industrial-style, plug-in relay should be added to the unit control center and wired in place of the remote switch (between terminal blocks 2 and 3 on the control strip — See FIGURE 5, Item #7). The relay must be rated for at least 5 amps and have a 24 Vac coil. Failure to comply with these guidelines may cause motor starters to “chatter” or not pull in which can cause contactor failures and/or motor failures.

TYPICAL CONTROL CENTER COMPONENTS

1.Main Disconnect

2.Motor Starter — Exhaust/Scavenger Air Fan

3.Motor Starter — Outdoor Air Fan

4.

Motor Contactor — Energy Wheel

1

5.

Control Power Transformer

8

 

(24 VAC Secondary)

 

5

6.

Energy Wheel Motor Transformer

 

 

(230 VAC Secondary)

6

 

(for HRE-20 & HRE-45 units with

 

primary voltage greater than 230 Vac)

 

7.

24 VAC Terminal strip

 

8.

Fuses for the control circuit, wheel

7

 

drive transformer, and blower

 

 

motors.

 

 

 

4

Control Center

2

3

Off

On

 

 

Main

 

 

Disconnect

 

 

Intake

FIGURE 5

 

Hood

 

 

Exhaust

 

 

Hood

 

 

5

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Image 5
Greenheck Fan HRE-90, HRE-20, HRE-45, HRE-55 manual Installation, Electrical Connections, Typical Control Center Components
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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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