Maintenance And Maintenance Schedule - Multifan VF9670D Montageanleitung

9. Maintenance and maintenance schedule

CAUTION: Never carry out mainenance work on a working/rotating fan! Always
disconnect from mains power supply before maintenance work.
During all maintenance of the fan:
The mains voltage has to be switched off.
•
The power circuit has to be disconnected and secured against reconnection.
•
• All rotating parts have to be brought to a complete standstill.
All safety and work regulations have to comply with EN 50110-1 and EN 1010-1.
•
• All work has to be carried out by qualified personnel (according to EN 50110-1 and EN
1010-1).
Servicing:
• Cleaning the fan regularly extends the lifetime of the fan.
Routine maintenance and cleaning should be carried out at least every 6 months.
•
Let the fan run at full speed for at least 2 hours a month, to evaporate humidity that may
•
have penetrated and to prevent corrosion of the bearings.
Cleaning:
Before cleaning, close the condense opening in the motor using the condense plug.
•
Check fan and air lines regularly for contamination.
•
Use a damp cloth or a dry brush to clean the fan.
•
• Do not use aggressive detergents.
Prevent water penetrating the motor or electric installation.
•
• After cleaning remove the condense plug at the lowest point of the fan.
Let the fan run at full speed for at least 2 hours, to evaporate humidity that may have
•
penetrated and to prevent corrosion of the bearings.
Bearings
The bearings are maintenance-free. The life span of the bearings is, with normal use,
•
approx. 30,000 hours. After this period the bearings must be replaced.
Regularly check the condition of the bearings by rotating the impeller manually. It must turn
•
smoothly and without noise.
Prevent unexpected start-up of the fan! Disconnect from mains power supply
before rotating the impeller manually!
Replace bearings only by original Multifan bearings.
VF9670D (20-09-2012)
Translation of original user manual 26/47