Hettich 9 257 300, Operating And Assembly Instructions Manual

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3. Safety
3.2 Safety rules for servicing work
Before carrying out maintenance work on the machine, you must
disconnect it from the power supply. For this reason, always heed
the following 5 safety rules before commencing work on electri-
cal machines:
1. Disconnect machine from the power supply.
2. Prevent the machine from switching back on again.
3. Make sure machine is disconnected from the power supply.
4. Earth and short circuit.
5. Cover or make inaccessible adjacent live parts.
Attach a sign forbidding anyone from switching the machine on
(see below).
Switch off / dissipate energy sources:
For safety regulations applicable to third party devices, refer to
the documentation from the third party manufacturers (operating
instructions for bought in units).
Do not switch on!
Work is in progress!
Date __________
Sign must only
be removed by
________________
Warning
Risk of injury from escaping residual energy!
After switching the machine off, any residual
energy may still be present that could escape
(e.g. in pressure tanks).
Dissipate residual or stored energy before
qualified personnel commence work on or in the
machine.
Electrical energy:
1. Switch off electrical energy via the main switch on electrical
cabinet.
2. Use a lock to prevent main switch from switching back on
again.
3. Attach a sign indicating that servicing work is being carried
out on the machine.
Fig. 2: Main switch on switch cabinet
Pneumatic energy:
1. Switch off pneumatic energy via the machine's supply con-
nection.
2. Depressurise machine components.
3. Dissipate any stored energy.
Fig. 3: Pneumatics servicing unit
en