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INSTALLATION
Maintenance
14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
Dismantle the appliance for maintenance work.
14.1 Draining the appliance
WARNING Burns
Hot water may escape during the draining process.
Drain the appliance via its connectors.
14.2 Opening the appliance
85
°C
35
55
65
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D0000034821
Pull off the temperature selector and the limiting ring.
Remove the screws from underneath the temperature
selector.
Open the appliance cover by lowering the bolt screws in-
wards and pivot the cover upwards, then remove it.
14.3 Descaling the appliance
!
Material losses
Never treat the cylinder surface with descaling agents.
Remove the flanged immersion heater.
Carefully tap the heating element to remove large limescale
deposits.
Immerse the heating element up to the flange plate in desca-
ling agent.
14.4 Checking the earth conductor
Pull off the temperature selector and the limiting ring.
Check the earth conductor (in Germany, e.g. BGVA3) across
a temperature controller fixing screw and the earth conduc-
tor contact of the power cable.
14.5 Replacing the power cable
The power cable must only be replaced by a qualified contractor
with an original spare part. Alternatively, the H05VV-F3x1.0 cable
may be used.
D0000034824
Route the power cable along the cable guide.
14.6 Positioning the temperature sensor in its
protective pipe
When replacing the temperature controller, guide the tem-
perature sensor into its protective pipe.
Secure the temperature sensor in place below the earthed
plug.
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185
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