Colasit CMVpro 125, Operating Instructions Manual, Page: 53 / 76

Maintenance | 10
Operating instructions CMVpro 125-400 | Version 1-en 53 / 76
10.3.2 Inside inspection
NOTICE Risk of damage due to vibration
Material damage and production downtime, reduced service life.
▪ Improper use or deposits on the impeller lead to imbalance and vibration.
u Switch fan off immediately in case of unusual vibration.
u
Check parts in contact with the medium.
Procedure:
• Remove sleeve from the inlet connection
_
Chap. 6.8 [
}
35]. If available, in-
sert a borescope into the gap.
• Otherwise, remove the inlet cover _ Chap. 11.5 [ } 61].
• Check impeller as well as internal housing for corrosion, stress cracks, de-
formations, and deposits.
• If necessary, clean the impeller and inside of the casing
_ Chap. 10.3.3 [ } 53].
• Replace damaged impeller immediately. Use only genuine spare parts.
10.3.3 Inside cleaning
NOTICE Risk of damage due to aggressive cleaning agents and sharp
cleaning tools
Damage to plastic surfaces.
u Select cleaning agent appropriate for conveyed medium and plastic fan ma-
terial.
u If possible, use warm water and a household cleaning agent.
u
Use a brush or a wooden scraper to loosen deposits.
Procedure:
• If present, first open casing drain (type K) and drain condensate into a con-
tainer.
• Loosen sleeve at inlet connection and remove ductwork end
_
Chap. 6.8 [
}
35].
• Remove the inlet cover from the casing together with the sealing ring
_ Chap. 11.5 [ } 61].
• Carefully clean impeller, inlet cover, and inside of the casing.
NOTICE Do not damage the impeller blades in doing so.
• If there are heavy deposits, also clean the fan connection ducts.
10.3.4 Annual inspection
The mechanical and electrical functionality of the fan are assessed in the annual
inspection, and its continued operation is ensured. This also applies in the event
of extensive downtime.
1. Outside inspection
• For stress cracks: fan housing
• For cracking: vibration absorbers
• For noises: motor bearings