OPERATION
Cleaning, care and maintenance
ENGLISH
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Note
The appliance is equipped with an air detector that large-
ly prevents damage to the heating system. If, during op-
eration, air is drawn into the appliance, the appliance
shuts down heating operation for one minute to protect
the heating system.
Following an interruption to the water supply
!
Material losses
To ensure that the bare wire heating system is not dam-
aged following an interruption to the water supply, the
appliance must be restarted by taking the following steps.
f Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f Vent the appliance and the cold water inlet line (see
chapter "Installation/ Commissioning/ Initial start-
up").
f Switch the power back ON.
3.1 Selecting the set temperature
1
D0000082927
1 Temperature selector for selecting the set temperature
3.2 Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
operate the appliance with a thermostatic valve, we recommend
that you:
f Adjust the set temperature on the appliance to over 50°C.
Then set the required set temperature on the thermostatic
valve.
Saving energy
The following recommended settings will result in the lowest en-
ergy consumption:
- 38°C for hand washbasins, showers, bath
- 55°C for kitchen sinks
Temperature limit via internal anti-scalding protection
(qualified contractor)
If required, the qualified contractor can set a permanent temper-
ature limit, for example in nurseries, hospitals,etc.
When supplying a shower, the appliance temperature setting
range must be adjusted by the qualified contractor to 55°C or less.
Limiting it in this way prevents water from flowing out of the
appliance at temperatures which could cause injury.
Recommended setting for operation with a thermostatic valve
and water preheated by solar energy
f Set the temperature at the appliance to the maximum
temperature.
4. Cleaning, care and maintenance
f Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
f Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
5. Troubleshooting
Problem Cause Remedy
The appliance will not
start despite the DHW
valve being fully open.
There is no power.
Check the fuses/ MCBs in
your fuse box/ distribu-
tion board.
The aerator in the tap
or the shower head is
scaled up or dirty.
Clean and/or descale the
aerator or shower head.
The water supply has
been interrupted.
Vent the appliance and
the cold water inlet line
(see chapter "Installa-
tion/ Commissioning/
Initial start-up").
When hot water is being
drawn off, cold water
flows for a short period.
The air sensor is detect-
ing air in the water. It
briefly switches off the
heating output.
The appliance restarts
automatically after
1minute.
Boiling noises are heard
during operation.
The appliance is not
vented.
Vent the appliance (see
chapter "Installation/
Commissioning/ Initial
start-up").
The supply pressure is
too low.
Ensure that the mini-
mum supply pressure is
achieved (see chapter
"Installation/ Specifica-
tion/ Data table").
The required tempera-
ture cannot be set.
Internal anti-scalding
protection is activated.
The internal anti-scald-
ing protection can only
be adjusted by qualified
contractors.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
Nr.: 000000-0000-00000
D0000073621
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