Itho Daalderop WPU 5G 25 c, User Manual

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6.4. Legionella prevention
The WPU heat pump is equipped with the automatic
LEGIONELLA PREVENTION function. This function
ensures that the water in the storage tank is heated once
a week to about 62 °C. At this temperature, any bacteria
present are killed.
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Warning!
If you turn off tap water heating (e.g. during a holiday
absence), the LEGIONELLA PREVENTION function will
also be disabled!
If you switched on the tap water heating again (ECO or
COMFORT); and the tap water heating has been off for
over a week, make sure you follow this procedure before
use:
a) Use the single TAP WATER COMFORT - BOOST
setting and wait for the water in the storage tank to
be at temperature for at least 20 minutes.
b) Open the hot water taps and rinse the hot water
pipes with hot water for a few minutes.
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Warning!
Make sure that the water does not spray during
flushing.
c) If desired, you can heat up the storage tank again
after flushing via BOOST.
Tip
After a holiday period, we recommend flushing the
entire pipe network (both cold and hot water) with
fresh water.
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