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The water heater’s temperature must be limited to 55 °C, if it is connected to a show-
er. The temperature limit must be set to a value less or equal 55 °C in the setting menu,
in consultation with the customer and the lock level must be activated.
When the appliance is operated with preheated water, it must be ensured that this
temperature is limited to 55 °C as well.
8. Initial Operation
Shower Application
Pos. OFF
Pos. 1
Locking Function
The operating mode of the appliance can be restricted.
Activation of the Locking Function
1. Select required parameters via the setting menu (see online user manual chapter
“Settings”, subpoints “Temperature limit” and / or “Load shedding”).
2. Disconnect the appliance from the power supply (e.g. by switching off the fuses).
3. Take the jumper off the power electronics and change to position “
1
” (see picture).
4. Put the appliance into operation again.
Deactivation of the Locking Function
1. Disconnect the appliance from the power supply (e.g. by switching off the fuses).
2. Take the jumper off the power electronics and change to position “
OFF
” (see pic-
ture).
3. Put the appliance into operation again.
9. Maintenance Work
Cleaning and Replacing the Filter Strainer
(a)
closed
open
(c)
(b)
Strainer
Cleaning and Replacing the Filter Strainer if Direct
Connected
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 appliance, 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).
Note: Residual water can leak
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“). Check all connections for leaks.
8. Vent the appliance 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 appliance. Then switch on the power again (e.g. via activating
the fuses).
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 appliance, 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.
Note: Residual water can leak
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. Check all connections
for leaks.
8. Vent the appliance 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 appliance. Then switch on the power again (e.g. via activating
the fuses).
Note: Maintenance work must only be conducted by an
authorised professional.
