STIEBEL ELTRON LWZ 170 E plus - Maintenance; WARNING Electrocution

ENGLISH
WWW.STIEBEL-ELTRON.COM LWZ 170 E PLUS / LWZ 370 PLUS | 23
INSTALLATION
Maintenance
13. Maintenance
WARNING Electrocution
In the event of damage to the power cable this must
always be replaced by a qualified contractor authorised
by the manufacturer, using original spare parts.
Maintenance by the qualified contractor includes the cleaning of
the cross-countercurrent heat exchanger and the fans.
Subject to runtime, this maintenance work should be carried out
every 3 years.
 Switch off the appliance by pressing the minus key for
5seconds.
 Disconnect the power supply.
 Open the filter door.
 Extract the filters. Make a note of how the filters were fitted.
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 Remove the front cover.
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 Carefully remove the heat exchanger from the appliance.
Avoid damaging the foam parts in the appliance.
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 Use a commercially available vacuum cleaner to remove dust
and other loose dirt particles from the intake and discharge
surfaces.
 If required, clean the heat exchanger with warm water
(max.55 °C) and a commercially available detergent. Never
use solvents.
 Afterwards flush the heat exchanger with water.
 Remove the plug-in connections from the back of the display
cover.
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 Undo both screws securing the display cover to the
appliance.
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 Remove the display cover.
 Disconnect the 4 pressure hoses and 3 plug-in connections
from the PCB.