MK Plastics RBK IO&M - Manual (Page 7)

7
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power sources.
2. Ensure fasteners and setscrews, particularly those used for mounting the fan, are tightened.
3. Inspect belt tension and pulley alignment.
4. Inspect motor wiring.
5. Ensure belt touches only the pulleys.
6. Ensure fan and any ductwork are clean and free of debris.
7. Inspect wheel-to-inlet clearance. The correct wheel-to-inlet clearance is critical to proper fan performance.
8. Restore power to the fan.
Start Up
Turn the fan on. In variable speed units, set the fan to its lowest speed and inspect for the following:
1. Direction of rotation.
2. Excessive
vibration.
3. Unusual noise.
4. Bearing noise.
5. Improper belt alignment or tension (listen for squealing).
6. Improper motor amperage or voltage.
If a problem is discovered, immediately shut the fan off. Lock out all electrical power and check for the cause of the
trouble. See Troubleshooting.
Inspection
Inspection of the fan should be conducted in the first 30 minutes, 8 hour and 24 hour intervals of satisfactory operation. During
the inspections, stop the fan and inspect as per the Conditions Chart.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten as necessary.
24 Hour Interval
Inspect belt tension, bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.
Maintenance
Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and
location of the fan.
Inspect fans exhausting corrosive or contaminated air within the first month of operation. Fans exhausting contaminated air
(airborne particles) should be inspected every three months, or sooner. Regular inspections are recommended for fans
exhausting non-contaminated air.
It is recommended the following inspection be conducted twice per year.
•
Inspect bolts and setscrews for tightness. Tighten as necessary. Worn setscrews should be replaced immediately.
• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. See Belt and
Pulley Installation on page. 4.
• Inspect for cleanliness. Clean exterior surfaces only. Removing dust and grease on motor housing assures proper
motor cooling. Removing dirt from the wheel and housing prevents imbalance and damage.
Motor Bearings
Motor bearings are pre-lubricated and sealed. Under normal conditions they will not require further maintenance for a period of
10 years. However, it is advisable to have your maintenance department remove and disassemble the motor, and lubricate the
bearings after 3 years of operation in excessive heat and or in a contaminated air stream consisting of airborne particles.
Fan Bearings
Relubrication is not required. Bearings are factory charged with the correct amount grease and do not require a further grease
charge.