12
How to service fans and fan motors,
continued
Procedure,
continued
Step
Action
3
Check that the pulleys are placed correctly and are completely parallel
4
Check that the fixing of the belt drive has been correctly adjusted.
Check the belt tightening by controlling that the deflection (F) matches the
specifications below (mm). The deflection strength of each belt depends on
the belt profile type used and the centre distance.
Dantherm Air Handling recommend the use of special-purpose tools for the
measuring of the belt tightening in order to ensure the control of the values
of the table below
Belt Profile
(type)
Centre
Distance (mm)
Deflection
Strength (Kg)
Deflection,
F (mm)
500-600 11
SPA-XPA
600-800
2,7
13
Procedure, 5000
operation
hours/annually
’)
Do as follows to service the fan ball bearings:
Step
Action
1
Check the wear and tear of the vibration-damping rubber bushings
*)
into
which the fans’ ball bearings are fitted
*)
only fans that have rubber bushings
2
Control the vibration dampers and the flexible connections
