Manual KVBF
• The service life of fans can be extended by quick passing of the resonance frequencies.
• Speed changings should be at max. 16,7 U/sec (1,75 rad/sec) (exception: passing of the resonance fre-
quencies).
• The operating instructions of the control device manufacturer must be observed.
• Comply with EMC Directive 2004/108/EG (1st March 2005).
General information:
• The fan and the frequency inverter should be installed as near as possible to one another.
• Use shielded and coated cables.
• All components (fan, frequency inverter and motor) should be earthed.
• The use of all-pole sinusoidal lters is recommended.
13 Maintenance and upkeep
DANGER! Live wires and connections!
Risk of injuries from electric current!
Have all electrical work done by a trained electrician only!
Periodically check the following according to ofcial requirements, however at least once a year (the st four
points only with the fan switched off!):
• screw connections, specically the rotor tting
• is there dirt in the fan wheel? If so, remove it.
• have accumulations formed on the rotor? If so, remove them.
• function of the safety components
• function of the control elements
• coil resistance
• operating current
• vibrations which may occur
• noises which may occur in the bearings of the electric motor
• Motors with extended nipples needs to be re-greased (grease type please take from motor name tag
or IMO from the motor manufacture) according to manufacturers‘ instructions.
Check the function of the system and controls (all poles) according to the system maintenance book at least
every 3 months, if not required more often.
Make the checks of the rst four points with the fan switched off.
The parameters of the other points may not deviate from the initial gures measured in installation.
If one of the parameters deviates from the initial gures, replace the motor or the fan wheel or have them
repaired by the manufacturer.
In the event of unauthorised interventions, warranty becomes ineffective.
Maintain the electric motor according to the enclosed instructions from the manufacturer.
Use the enclosed maintenance record.
NOTE Risk of damage to the fan by cleaning with high pressure devices.
Only clean the fan manually, with a vacuum cleaner or with compressed air!
NOTE Risk of damage to the fan!
Systemair assumes no liability for damage caused by using outside parts.
Only use original Systemair spare parts.
18
Smoke and heat exhaust fans