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OpEraTiON
Cleaning, care and maintenance
4.1
Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
be operating the appliance with a thermostatic valve, we recom-
mend that you:
f Adjust the set temperature on the appliance to over 50 °C.
f
Then set the required set temperature on the thermostatic
valve.
Saving energy
The following recommended settings will result in the lowest en-
ergy consumption:
- 35 °C for hand washbasins and bathtubs
- 55 °C for kitchen sinks
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
f
removing the fuses/tripping the MCBs.
f Open the tap for one minute until the appliance and
f
its upstream cold water inlet line are free of air.
f Switch the power back ON.
f
5.
Cleaning, care and maintenance
f Never use abrasive or corrosive cleaning agents. A damp
f
cloth is sufficient for cleaning the appliance.
f Check the taps regularly. Limescale deposits at the tap out-
f
lets can be removed using commercially available descaling
agents.
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6.
Troubleshooting
problem
Cause
The appliance will not
There is no power.
start despite the DHW
valve being fully open.
The aerator in the tap
or the shower head is
scaled up or dirty.
The water supply has
been interrupted.
When hot water is being
The air sensor detects air
drawn off, cold water
in the water and briefly
flows for a short period.
switches the heater off.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
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remedy
Check the fuses/MCBs in
your fuse box/distribu-
tion board.
Clean and/or descale the
aerator or shower head.
Vent the appliance and
the cold water supply line
(see chapter "Operation /
Recommended settings /
Following an interruption
to the water supply").
The appliance restarts
automatically after
1 minute.
DHB-E |
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