Maintenance - STIEBEL ELTRON SNU 5 SL Operation And Installation Manual

INSTALLATION

Maintenance

14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
f Dismount the appliance for maintenance work. f
14.1 Draining the appliance
WARNING Burns
Hot water may escape during the draining process.
f Drain the appliance via the connector. f
14.2 Opening the appliance
f Pull off the temperature selector and the limiting ring. f
f Remove the screws underneath the temperature selector. f
f Open the appliance cover by lowering the bolt screws in- f
wards and pivot the cover upwards, then remove it.
14.3 Descaling the appliance
Material losses
!
Never treat the cylinder surface with descaling agents.
f Remove the flanged immersion heater. f
f Carefully tap the heating element to remove large limescale f
deposits.
f Immerse the heating element up to the flange plate in desca- f
ling agent.
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14.4 Cleaning the strainer
f Detach the "cold water inlet" connection. f
f Using pliers, remove the strainer from the "cold water inlet" f
connection.
f Descale or replace the strainer. f
14.5 Checking the earth conductor
f Pull off the temperature selector and the limiting ring. f
f Check the earth conductor (in Germany, e.g. BGV A3) across f
a temperature controller fixing screw and the earth conduc-
tor contact of the power cable.
14.6 Replacing the power cable
The power cable must only be replaced by a qualified electrician
with the original spare part. Alternatively, the H05VV-F3x1.0 cable
may be used.
f Route the power cable along the cable guide. f
14.7 Positioning the temperature sensor in its
protective pipe
f When replacing the temperature controller, guide the tem- f
perature sensor into its protective pipe.
f Secure the temperature sensor in place below the earthed f
plug.
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