Installation Guide

BIG ASS FAN 4900

26 Preventive Maintenance

WARNING: Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting means

to prevent power from being switched on accidentally. When the service disconnecting means cannot be locked, securely

fasten a prominent warning device to the service panel, such as a tag.

WARNING: When service or replacement of a component in the fan requires the removal or disconnection of a safety

device, the safety device is to be reinstalled or remounted as previously installed.

Please take a few moments each year to perform the following preventive maintenance inspection on your fan to ensure its safe and

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have any questions, contact Customer Service. Note: Actual installation setup may differ from picture.

Annual preventive maintenance

Perform the following maintenance procedures each year using the Annual Maintenance Checklist on the following page.

1. Check for the presence of the safety cable and shackle. The cable should be wrapped around the angle irons/I-beam leaving as little

slack as possible. The shackle should be securely tightened and located on the topside of the angle irons/I-beam.

2. Ensure all mounting bolts are present and torqued to 40 ft·lb (54.2 N·m). There are four (4) bolts for direct mount installations and 12

bolts for installations with an extension tube.

3. Inspect motor terminations inside the junction box and tighten if necessary.

4. Check the gear reducer for oil leakage. If leakage is present, contact Customer Service.

5. Ensure all 12 bolts securing the airfoils to the fan are present and torqued to 29 ft·lb

(39.3 N·m).

6. Ensure the airfoils are secured to one another by airfoil retainers.

7. Ensure the bolts securing the winglets to the airfoils are securely tightened.

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9. Inspect the airfoils and hub for signs of damage or cracks.

General preventive maintenance

• Check all connections in the fan controller and tighten as needed. Using a vacuum, remove

all dust and debris from the inside and outside of the controller.

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• Dust the airfoils, motor, and motor housing. If desired, use a gentle cleaner or degreasing

agent to polish the foils. Do not use Clorox

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result in the release of toxic/fatal fumes.

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precess. If any wobble is noticed, ensure the mounting structure is rigid enough to

support the fan.

WARNING: Do not operate a fan with missing or damaged components.

Please contact Customer Service.