Heat Exchangers - Miele PT 8257 WP Operating And Installation Instructions

Heat exchangers

Regular and professional maintenance preserves the
high efficiency of the system and helps increase
component life.
During operation, lint as well as detergent residues
and other substances contained in water vapor
collect on the heat exchangers. Soiling of the heat
exchangers decreases the transfer of heat to air,
thereby reducing system efficiency. Heat exchangers
should therefore be cleaned regularly, or more
frequently in the case of heavy lint soiling or high
volume of use, by Miele Technical service.
For easier cleaning a nozzle is included with the
dryer. Screw the nozzle into a water hose with a 3/4"
connection.
– Turn off the system and disconnect from power
supply!
– Open the maintenance cover on the rear side of
the heat pump. Put the maintenance cover in a
safe place (trip and injury hazard).
– Before the start of the rinsing process, remove the
collecting basin and rid it of coarse particles. This
prevents the drain from becoming clogged. Then
put back the collecting basin before starting the
rinsing process.
Make sure not to bend or damage the slats.
– Clean the heat exchanger with a brush in the
indicated areas (arrows). Replace the drip tray
before you start to rinse.
– Thoroughly rinse out the heat exchangers with a
water hose (max. 4 bar) for several minutes. Water
must enter only the described area of the heat
exchangers (see box in picture above). Using
power washers and detergents containing chlorine,
sand, soda or acid is prohibited.
– As an alternative cleaning method, the heat
exchangers can be vacuumed or brushed off.
– To prevent flooding the dryer or the room in which
it is located, ensure that the cleaning water drains
sufficiently.
– Remove all soiling that is not rinsed out.
– Clean the collection basin and check the water
drain for possible clogs.
– Seal off the heat exchangers by closing the
maintenance cover before returning the system to
operation.
– Before turning on the power supply, make sure that
no electrical parts have come into contact with
rinsing water.
– To protect the fins, avoid direct contact and wear
gloves to prevent cuts.
,
Only the heat exchangers (area behind the
maintenance cover) may be cleaned with water.
Water must not be used to clean the dryer and
other parts. Danger of fatal electric shock!
,
The dryer needs timely and professional
maintenance to prevent performance loss,
malfunctions and the risk of fire.
Cleaning and care
23