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7. Maintenance work
EN
(a)
(b)
(c)
Strainer
Maintenance work must only be conducted by an authorised professional.
Cleaning and replacing the filter strainer
The cold water connection of this instantaneous water heater is equipped with an inte-
grated shut-off valve and a strainer. Soiling of the strainer may reduce the warm water
closed
output. Clean or replace the strainer as follows:
1.
De-energize the instantaneous water heater (e.g. via deactivating the fuses) and
prevent inadvertent reactivation of them.
2. Close the shut-off valve (a) in the cold water connection piece (position "closed").
3. Unscrew the screw plug (b) from the cold water connection piece and take out the
strainer (c).
Note: Residual water can leak
open
4. The strainer can now be cleaned or re placed.
5. After fitting of the clean strainer tighten the screw plug.
6. Slowly reopen the shut-off valve in the cold water connection piece (posi-
tion "open"). Ensure that there are no leakages.
7. Vent the appliance by carefully opening and closing the affiliated warm water tap
valve several times until air no longer emerges from the pipe.
8. Switch on the power again (e.g. via activating the fuses).
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