-20 -
VARVEL
IUM
DIRECTIVE 94/9/CE - (ATEX)
9.5 Safety Instructions
Pulse generator wiring must be made before
variator installation:
•
rotate the variator output shaft until a pole piece (A)
of the friction ring holder is shown through the side
threaded hole of the housing;
•
apply adeguate quantity of liquid locking threadsealing
on housing threaded hole M12x1, warning do not
introduce liquid sealing inside the housing;
•
carefully screw the pulse generator to get in touch
with the pole piece;
•
unscrew the pulse generator of 360°;
•
apply adeguate quantity of liquid locking threadsealing
between enclosed lock-nut (B) and housing;
•
secure pulse generator by screwing the equipped
lock-nut (B).
We recommned the utmost attention during the pulse generator adjustment because a mistake in screwing depth would
cause wrong impact with friction ring holder and the consequent damaging of both the parts and a mistake in pulse
generator sealing would cause the not ermetic sealing of variator and the IP66 protection level.
Speed control device adjustment
The above set up distance gives six pulses for each friction ring revolution.
Speed control device must be fitted and put into operation according to manufacturer’s documentation and installed
outside the potential esplosive atmosphere.
When installing:
•
note working speed of variator on operation conditions;
•
set stop speed of speed control device (according to working instructions of the used device) to 90% of the above
working speed;
•
modify the stop speed according to working speed modifications.
Maximum operating time of speed control device must be shorther than 3 seconds: detect and remove the variator
slipping cause prior to switch the variator on again.
In case vibrations or anomalous noise occur during the variator starting, stop the variator and replace the friction ring
damaged by slipping (friction ring replacement at page 22).
The right wiring of the pulse generator to speed control device and to main control board is left to the sole responsibility of
the appointed technician.
A
B
ACNH B.V.
http://www.wentellagers.nl
