Preventive Maintenance; Annual Preventive Maintenance; General Preventive Maintenance - Bigass 4900 Manuel D'installation

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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 servicing of a component in the fan requires the removal or disconnection of a safety

device, the safety device must 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 efficient operation. Before contacting Customer Service, try mending the issue using the

procedures in the Troubleshooting section. If you 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.

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

angle irons leaving as little slack as possible. The shackle should be securely tightened and located on the

topside of the I-beam/angle irons.

2. Ensure all mounting bolts are present and torqued to 40 ft·lb (54.2 N·m). There are four 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.

8. Inspect for signs of corrosion, discoloration, pitting, or flaking

of metal.

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

General preventive maintenance

• Check all connections in the VFD and tighten as needed.

Using a vacuum, remove all dust and debris from the inside

and outside of the VFD.

• Verify proper fan rotation. The fan should be turning

counterclockwise when viewed from the floor.

• Dust the airfoils, motor, and motor housing. If desired, use a

gentle cleaner or degreasing agent to polish the foils. Do not

use Clorox® or other chlorine based cleaners! This could result

in the release of toxic/fatal fumes.

• Observe the motion of the fan during operation. The fan

should not wobble or 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.