DEX ELECTRONIC MPS®
30
EN
10. Maintenance work
Maintenance work must only be conducted by an authorised professional.
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
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. To open the hood, take off the small face plate, loose the screw behind this cover
and detach the hood.
3. Close the shut-off valve (a) in the cold water connection piece (position “closed“).
4. Unscrew the screw plug (b) from the cold water connection piece and take out the
strainer (c).
5. The strainer can now be cleaned or re placed.
6. After fitting of the clean strainer tighten the screw plug.
7. Slowly reopen the shut-off valve in the cold water connection piece (posi-
tion “open“).
8. Vent the unit by carefully opening and closing the affiliated warm water tap valve
several times until air no longer emerges from the pipe.
9. Fit the hood of the unit. Then switch on the power again (e.g. via activating the
fuses).
Cleaning and replacing the filter strainer
(a)
closed
open
(c)
(b)
Strainer
The cold water connection of this instantaneous water heater is equipped with a
strainer. Soiling of the strainer may reduce the warm water 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 in the mains water supply of the instantaneous water
heater.
3. To open the hood, take off the small face plate, loose the screw behind this cover
and detach the hood.
4. Unscrew mains water inlet from connection piece and take out the strainer.
5. The strainer can now be cleaned or replaced.
6. After refitting the clean strainer reconnect the mains water inlet to the connection
piece.
7. Slowly reopen the shut-off valve in the mains water supply.
8. Vent the unit by carefully opening and closing the affiliated warm water tap valve
several times until air no longer emerges from the pipe.
9. Fit the hood of the unit. Then switch on the power again (e.g. via activating the
fuses).
Cleaning and replacing the filter strainer if direct connected
