Miele TWJ 660 WP Operating Instructions Manual page 10

Warning and Safety instructions
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In the event of a fault or for cleaning purposes, the tumble dryer is
only completely isolated from the electricity supply when:
- it is switched off at the wall socket and the plug is withdrawn, or
- it is switched off at the mains circuit breaker.
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This tumble dryer must not be installed and operated in mobile
installations (e.g. on a ship).

Do not make any alterations to the tumble dryer, unless authorised
to do so by Miele.
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Heat pump technology and refrigerant:
The heat pump in this tumble dryer uses a gaseous refrigerant. The
refrigerant, which is brought to a higher temperature and liquefied by
condensing, is transferred in a closed circuit through the heat
exchanger unit where heat exchange takes place with the circulating
drying air.
 Damage to the tumble dryer by switching it on too soon.
This can damage the heat pump.
After setting up the tumble dryer, wait for at least one hour before
switching it on.
- The humming noises caused by the heat pump during the drying
process are normal. They do not impair the efficient functioning of
the dryer.
- The refrigerant is not flammable or explosive.
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