5. MAINTENANCE
20
5.4 Fans
The following general steps should be taken to maintain the centrifugal or plug fans of the
unit:
•
Check the fan wheel for unbalance (every 3 month).
•
Check the fan and motor bearings for unusual noise (every 3 month).
•
Check vibration dampers for damage (every 3 month)
•
Clean the fan wheel if it is necessary, either dry or wet (every 12 month).
•
Check all flexible connections for damage/leakage (every 12 month).
•
Check if all mounting bolts are tight (every 12 month).
For more specific maintenance of either the centrifugal or plug fan see 5.4.1 or 5.4.2.
5.4.1 Centrifugal fans
Every 3 month the transmission of the belt driven centrifugal fans should be checked in the
following way:
•
Check that the pulleys are placed correctly and in line. Check if all bolts of the pulley
are fastened.
•
Check the belts on wear and damage. When replacing belts on a transmission with
more than one belt, all belts have to be changed.
•
Check the belt tension by controlling the deflection (F) in the following way.
5.4.2 Plug fans
The following steps should be taken to maintain the plug fans of the unit:
•
Check if all bolts of the fan wheel pulley are fastened (every 3 month).
•
Check the pressure hoses from the pressure transmitter to the fan for leakage or
damage (every 3 month).
Belt profile
Centre distance C
(mm)
Deflection strength
(kg)
Deflection F
(mm)
SPA / XPA
500 - 600
2.7
11
SPA / XPA
600 - 800
2.7
13
Summary of Contents for DanX AF 12/24
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