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10 Maintenance and servicing
When working on the vibrators, these must be safely disconnected from the elec-
trical mains. The procedure is as follows:
1. Switch off vibrator.
2. Secure against unintentional switching on.
DISCON-
3. Determine that NEA and NEG are voltage-free.
NECT
4. Earth and short-circuit.
POWER
5. Cover and fence off neighbouring live parts.
SUPPLY
The following maintenance work must be carried out regularly by trained person-
nel with extensive knowledge of EN 60079-17 (zone 22):
Other maintenance and repair work are to be carried out exclusively by
NetterVibration.
WARNING
Authorised and specialised staff may also perform the following work on the vi-
brators:
Please observe the safety instructions in chapter 2 when service on the
unit is done.
Retightening:
Screw connections must be checked and, if necessary, retightened after 1 h op-
erating time (after initial commissioning) and thereafter regularly (generally
WARNING
monthly). Observe the specified torques (see chapter 6.1).
The condition of the ball and roller bearings must be checked regularly.
The replacement of defective bearings or bearings which have reached the end
of their service life must be made by NetterVibration.
DANGER
a)
Check the screw connections
b)
Check the ball and roller bearings
c)
Relubricate roller bearings
d)
Check operating hours (bearing life)
e)
Check cable supply line
f)
Replace O-rings and plastic seals every two years
The adjustment of the unbalance discs with the removal of the unbal-
ance covers.
The electric connection with the removal of the terminal block cover.
21
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