Inspection: CW/CWB

Inspection of the fan should be conducted at the first 30 minute and 24 hour intervals of satisfactory operation.

30 Minute Interval

Inspect bolts, setscrews and motor mounting bolts. Adjust and tighten as necessary.

24 Hour Interval

Check all internal components. On CWB unit only, inspect belt alignment and tension. Adjust and tighten as necessary.

IMPORTANT

Adjust (tighten) belt tension after the first 24-48 hours of operation.

Maintenance: CW/CWB

A proper maintenance program will help these units deliver years of dependable service. Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and who are experienced with this type of equipment.

Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior surfaces only. Removing dust buildup on motor housing ensures proper motor cooling.

Greasing of motors is only intended when fittings are provided. Many fractional horsepower motors are permanently lubricated and should not be lubricated after installation. Motors supplied with grease fittings should be greased in accordance with manufacturers’ recommendations. Where motor temperatures do not exceed 104ºF (40ºC), the grease should be replaced after 2,000 hours of running time as a general rule.

Wheels require very little attention when moving clean air. Occasionally, oil and dust may accumulate causing imbalance. When this occurs the wheel and housing should be cleaned to ensure smooth and safe operation.

All fasteners should be checked for tightness each time maintenance checks are performed prior to restarting unit.

A proper maintenance program will help these units deliver years of dependable service.

Belt/Bearing Maintenance CWB Unit

1.Belts tend to stretch after a period of time. They should be checked periodically for wear and tightness. When replacing belts, use the same type as supplied with the unit.

2.Matched belts should always be used on units with multi-groove pulleys.

3.For belt replacement, loosen the tensioning device enough to allow removal of the belt by hand. Do not force the belts on or off. This may cause cords to break, leading to premature failure.

WARNING

Always disconnect, lock and tag power source before servicing. Failure to disconnect power source can result in fire, shock or serious injury.

CAUTION

Uneven cleaning of the wheel will produce an out of balance condition that will cause vibration in the fan.

WARNING

This unit should be made non-functional when cleaning the wheel or housing (fuses removed, disconnect locked off).

4.Once installed, adjust belts as shown in “Pre‑Starting Checks.”

5.Shaft bearings can be classified in two groups:relubricating and non-relubricating. All non‑relubricating bearings on standard model CWB fans are factory lubricated and require no further lubrication under normal use (between -20º to 180ºF (-29º to 82ºC) in a relatively clean environment).

6.Units installed in hot, humid or dirty locations should be equipped with special bearings. These bearings will require frequent lubrication. On CWB belt driven fans, the standard cast pillow block bearings are factory lubricated and are provided with external grease fittings. Annual lubrication is recommended, or more frequently if needed, see Table 2. Do not over-grease. Use only one or two shots of lubricant with a hand gun. Maximum hand gun rating is 40 psi. Rotate bearings during lubrication where good safety practice permits. Caution should be employed to prevent over packing or contamination.

7.Grease fittings should be wiped clean. The unit should be in operation while lubricating. Extreme care should be used around moving parts.

8.Grease should be pumped in very slowly until a slight bead forms around the seal. A high grade lithium base grease should be used.

9.When installing restaurant exhaust applications follow NFPA 70 for cleaning fans.

10.Grease containers must be emptied at regular intervals to prevent overflow.

11.To ensure tightness, check pulley setscrews. Proper keys must be in keyways.

12.Fan RPM should not be readjusted. Only use pulleys of identical size and type when replacing pulleys.

13.During the first few months of operation check bearing set screws periodically to ensure tightness.

14.If unit is to be left idle for an extended period, remove belts and store in a cool, dry place to avoid premature belt failure.

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Model CW/CWB • Centrifugal Sidewall Exhaust Fans

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Greenheck Fan manual Inspection CW/CWB, Maintenance CW/CWB, Minute Interval, Hour Interval
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CW/CWB specifications

Greenheck Fan CW/CWB series units are engineered to deliver exceptional performance and efficiency in a wide range of commercial and industrial applications. These fans are particularly noted for their versatility, reliability, and advanced technology, making them an ideal choice for various ventilation and exhaust needs.

One of the standout features of the CW/CWB series is its robust construction. Built with high-quality materials, these fans ensure durability and longevity even in the most demanding environments. Their design incorporates a heavy-gauge steel housing that effectively reduces noise levels, allowing for quieter operation without compromising performance.

The CW/CWB fans are equipped with high-efficiency motors that significantly reduce energy consumption compared to conventional fan systems. These motors are designed to operate at optimal efficiency, which not only lowers operating costs but also minimizes environmental impact. The fans are available in various configurations, including belt-drive and direct-drive options, providing flexibility to meet specific application requirements.

In terms of airflow performance, the CW/CWB series boasts an impressive range of airflow capacities. With a wide selection of sizes and wheel diameters, these fans can be tailored to suit the unique demands of different spaces. The efficient fan design promotes balanced airflow, ensuring uniform distribution without dead spots or turbulence.

Another notable characteristic of the CW/CWB fans is their ease of maintenance. The thoughtfully designed housing allows for simple access to internal components, making routine inspections and servicing straightforward. This design feature is particularly beneficial for facilities looking to minimize downtime and maintain optimal operational efficiency.

The integrated technologies of the CW/CWB series enhance their overall performance. Advanced automation options, including variable frequency drives (VFDs), enable precise control of fan speed and airflow. This adaptability allows operators to respond to changing conditions and demands quickly.

In summary, Greenheck Fan's CW/CWB series units epitomize high-performance ventilation technology. With their durable construction, energy-efficient motors, exceptional airflow capabilities, and user-friendly maintenance features, these fans are an excellent choice for a diverse range of applications, ensuring reliable and efficient operation for years to come.
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