Fasteners and SET Screws

BEARINGS (For belt drive fans only)

Bearings are the most critical moving part of the fan and should be inspected at periodic intervals. Locking collars and set screws, in addition to fasteners attaching the bearings to the bearing plate, must be checked for tightness. In a clean environment and temperatures above 32°F./below 200° F., fan shaft bearings with grease fittings

should be lubricated semi-annually using a high quality lithium based grease. If unusual environmental conditions exist temperatures below 32°F./above 200°F., moisture or contaminants, more frequent lubrication is required.

With the unit running, add grease very slowly with a manual grease gun until a slight bead of grease forms at

the seal. Be careful not to unseat the seal by over lubricating or using excessive pressure. Bearings without grease fittings are lubricated for life.

Any fan vibration has a tendency to loosen mechanical fasteners. A periodic inspection should include checking all fasteners and set screws for tightness. Particular attention should be paid to set screws attaching the propeller to the shaft and the shaft to the bearings. Loose bearing set screws will lead to premature failure of the fan shaft.

LUBRICATION

Refer to the paragraph on bearings for bearing lubrication. Many fractional horsepower motors installed on the smaller fans are lubricated for life and require no further attention. Motors equipped with oil holes should be oiled in accordance with the manufacturer's instructions printed on the motor. Use a high grade SAE 20 machine oil and use caution not to over lubricate. Motors supplied with grease fittings should be greased according to directions printed on the motor.

REMOVAL OF DUST AND DIRT

Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant and collects on propeller blades causing severe imbalance if left unchecked. The exterior surface of the motor, fan panel and entire propeller should be thoroughly cleaned periodically. Use caution and do not allow water or solvents to enter the motor or bearings. Under no circumstances should motors or bearings be sprayed with steam or water.

DAMPER INSPECTION AND SERVICE

If an optional tall base with damper is supplied, access to the optional dampers and actuators is provided by a removable door. Simply release the two cam latches and slide the damper out for inspection, cleaning or service.

For fan sizes 24 through 36 supplied without a tall base, the entire unit must be lifted off the roof curb for access to the damper. For fan sizes 42 through 72 suppled without a tall base, access to the damper is made by removing one end birdscreen or filter and working on the damper from above. SEE WARNING ON PAGE 2.

FILTER MAINTENANCE (FILTERED SUPPLY FANS)

Aluminum mesh filters should be cleaned on a regular basis for optimum fan efficiency. The frequency of cleaning depends upon the cleanliness of the incoming air.

To remove filters on fan sizes 24 to 30, first remove the hood as shown in fig.1. The filters can then be pulled from the slide-out racks (shown in photo). On fan sizes 36 to 60, access panels on the end panels are provided which allow the filters to be removed without removing the hood.

Filters should be washed with a mild detergent in warm water. After the filters are dry, an adhesive spray available at most filter distributors may be applied to increase filter efficiency.

Sliding filter out of filter rack.

Hooded Propeller Roof Fans specifications

Greenheck Fan is a leader in the manufacturing of ventilation equipment, recognized for its innovative solutions that enhance indoor air quality and energy efficiency. Among their extensive product lineup, the hooded propeller roof fans stand out for their superior performance and reliable operation in various applications.

The primary function of Greenheck's hooded propeller roof fans is to provide effective ventilation while optimizing air movement in commercial and industrial settings. One of the main features of these fans is their hooded design, which serves to protect the fan blades from rain, snow, and debris. This aerodynamic hood not only extends the life of the fan but also improves its performance by minimizing the effects of wind and other environmental factors.

Greenheck's hooded propeller roof fans are available in various sizes and configurations, making them suitable for a wide range of applications. They are designed to effectively exhaust air from spaces such as warehouses, restaurants, and manufacturing facilities, contributing to improved air quality and comfort. The fans are equipped with powerful propeller blades that deliver high airflow rates while maintaining low noise levels, a critical factor in environments where minimizing sound is essential.

The fans incorporate advanced technologies to enhance energy efficiency and operational reliability. For instance, many models feature energy-efficient motors that reduce power consumption without compromising performance. Additionally, the fans are built with durable materials that withstand harsh weather conditions, ensuring dependable operation year-round.

Another notable characteristic of Greenheck's hooded propeller roof fans is their ease of installation and maintenance. The fans are often designed to be mounted directly to the roof, minimizing the need for extensive support structures. Their simple design means that routine maintenance can be carried out quickly and efficiently, helping to keep downtime to a minimum.

Overall, Greenheck's hooded propeller roof fans represent a blend of functionality, durability, and efficiency. The combination of hooded designs, energy-efficient motors, and robust construction makes these fans a popular choice for those seeking reliable ventilation solutions. With their commitment to innovation, Greenheck remains at the forefront of the industry, meeting the evolving needs of its customers while promoting sustainable practices.