Cleaning The Heat Exchanger - Miele PT 8257 WP Operating Instructions Manual

Cleaning and care

Cleaning the heat exchanger

Regular and specialist maintenance of the entire
system will maintain the high efficiency of the unit and
help increase the lifespan of its components.
During use, fluff from textiles as well as detergent
residues and other elements present in the
condensed steam collect on the heat exchanger.
Soiling on the heat exchanger reduces heat transfer
to the air and in so doing the efficiency of the unit.
This is why it is important to have the heat exchanger
cleaned annually, or where there is a heavy build-up
of fluff or the dryer is operated very frequently, more
often by a Miele authorised service technician.
– Make sure that the unit is completely
disconnected from the mains electricity supply.
There must be no voltage present.
– Open the maintenance panel on the back of the
heat pump unit. Place the maintenance panel to
one side safely (danger or injury and tripping over
it).
– Before starting the rinsing process, take out the
collection tray and remove coarse soiling from it.
This will prevent the drain from becoming blocked.
Replace the collection tray before you start rinsing.
– Use a jet of water (max. 4 bar) to rinse the heat
exchanger thoroughly for several minutes. The
use of pressure washers or cleaning agents
containing chlorine, sand, sodium carbonate or
acid is not permitted. You can use a vacuum
cleaner or brush to clean the heat exchanger.
Ensure that the slats are not bent or damaged.
The use of water is permitted only within the
specific area of the heat exchanger described.
– Make sure that you provide adequate drainage for
the water used for cleaning to avoid flooding the
dryer or the room in which it is located.
– Remove any soiling which has not been rinsed out.
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– Clean the collection tray and check the drain for
any blockages.
– Make sure heat exchanger is enclosed by the
maintenance panel before operating the unit again.
– Make sure that no electrical parts have come into
contact with water before supplying electricity to
the unit again.
– Avoid touching the slats to protect them from
damage and wear gloves to prevent cuts to your
hands.
,
Water may be used to clean the heat
exchanger (in the area behind the maintenance
panel) only. Using water to clean the dryer and
other parts is not permitted. Danger to life from
electric shock.
,
To ensure the correct performance of the
tumble dryer and to prevent the risk of faults and
fire, it is important to check the machine and carry
out maintenance on a regular basis.