Hettich ROTANTA 460 R Mode D'emploi page 108

Commissioning
Connecting the centrifuge to a
nitrogen supply
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NOTICE
Damage to the device due to condensation.
There is a risk of condensation forming on electrical com-
ponents when component surfaces are cold and the sur-
rounding air is warmer. The condensation that forms may
cause a short circuit and/or destroy electronics.
−
Warm the device up for at least 3 hours in a warm room
before connecting it to the mains.
or
−
Warm up for 30 minutes in a cold room.
Personnel:
■
Trained user
1. A type B residual current circuit breaker must be used if the device
is additionally protected with a residual current circuit breaker in the
building installation.
When using a different type, the residual current circuit breaker may
either not switch off the unit if there is a fault on the unit, or it may
switch off the unit even though there is no fault on the unit.
2. Check whether the mains voltage matches the specification on the
rating plate.
3. Connect the device to a standard mains socket using the mains
cable.
Valid only for model with nitrogen supply.
■
A monitoring device for the oxygen concentration must be used, with an
additional limit switch-off, to ensure that no ignitable mixture is created in
the centrifuge.
■
The operator must arrange for the "centrifuge and monitoring device"
application to be approved by an accredited testing institute (e.g. TÜV
in Europe), in accordance with Annex II of Directive 94/9/EC (ATEX-95).
This also includes specifying the substances used, the type of ignition
protection and the preparation of a risk assessment.
■
The system is used at the operator's risk.
■
Special instructions on the leak-tightness of the centrifuge parts with
regard to nitrogen flushing. The operator must ensure the leak-tightness
and functionality of the following interfaces:
–
Seal between the lid and the centrifuging chamber.
–
Seal between the centrifuging chamber and the motor cover.
–
Leak-tightness of the inlet and outlet connections for nitrogen
inerting.
Personnel:
■
Trained user
1. The centrifuge is prepared for connection to a nitrogen supply.
Rev.: 24 / 01.2024 AB5650en