Maintenance by a qualified person

The fan should be regularly checked and maintained. In particular, ensure:

• unimpaired flow in the air duct.
• the effectiveness of the protective grilles.
• compliance with the permitted temperatures.
• quiet bearings. Bearing life of 40 000 hours, depending on application.
• cables are secure in the terminal box.
• potential damage to terminal box, cable screw-connections, sealing plugs and cables.
• secure routing of cables.

During regular safety checks (maintenance interval), undertake a complete check in accordance with the previous test schedules.

This involves checking the function of safety components, air gap, power consumption, bearing noise, damage and disproportional vibration (e.g. impeller imbalance). Remove dirt and foreign particles.