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www.hlu.eu
06.2019
Operating manual
Centrifugal fans
HF R | RV | MRV
Designation
e Centre distance
ß Angle of belt contact
D Diameter of big pulley
d Diameter of little pulley
F Test force in N
L Free belt length
Ea Required deexion in mm
Retension of V-belt
Loosen both screws on the motor ange
(A bearing). Then pull the motor at the terminal box at
a 45 ° angle downwards [F] so that the belt is tensio-
ned. Tighten the screws slightly, then pull the motor
downwards at an angle so that the belt tension rises
again. While the tension is maintained, rst tighten
the screw with the clamping angle (1), then tighten
the screw directly at the ange (2).
Then check the belt tension again and if necessa-
ry repeat the process until the required tension is
reached (if sucient force can not be applied, use
torque-increasing measures [leverage]).
(1)
(2)
[F]
8.4 Inspection interval / Function checking
Interval with single-shift operation
d w m ½ y 1 y MO
Superordinate facility for connecting the
supply voltage
x
Settings of the on-site protective devices x
Fan motor function checking x
Bearing function checking x
Check belt tension and correct if necessary x
Check the impeller for damage x
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General