18
Operation
3.
Appliance description
The hydraulically controlled instantaneous water heater
heats water as it flows through the appliance.
When a tap
is opened, the heating output starts automatically as soon
as the start-up volume is exceeded (see chapter «Specifi
-
cation / Data table»). The water volume and temperature
can be adjusted at the tap.
You can choose between 2 output stages. In addition, 2
output stages are hydraulically controlled in relation to the
flow rate.
The flow rate controller compensates for pressure fluc
-
tuations, thereby ensuring largely stable temperatures.
The controller limits the throughput, thereby ensuring an
adequate increase in the DHW temperature at all times.
Heating system
The bare wire heating system has a pressure-tested plas-
tic casing. The heating system is suitable for hard and soft
water areas and is largely insusceptible to scale build-up.
This system ensures rapid and efficient DHW availability.
4. Settings
26
_0
2_0
2_0
78
3
2
1
1 Partial load
At low throughput 1/3 of the heating output is activat-
ed; at higher throughput 2/3 of the available heating
output is enabled. This setting is suitable for hand
washing at a basin, for example.
2 Full load
At a low throughput, 50 % of the heating output is ap-
plied; at a higher throughput the full heating output is
activated. This setting is suitable for washing dishes,
for example.
» Click the output selector into the required position.
Recommended settings when using a
thermostatic valve
» Set the output selector to full power.
4.1
Recommended tap/valve settings
Note
If the outlet temperature is not sufficiently high at
full load and with the draw-off valve fully open, then
more water is flowing through the appliance than
can be heated by the heating system (appliance is
at its output limit).
»
Reduce the water volume at the draw-off valve.
Low draw-off rate = high outlet temperature
High draw-off rate = low outlet temperature
Twin lever tap
Output stage
Application range
Partial load
Washbasin
Full load
Bath, shower, sink
» Add cold water if the temperature is too high when
the tap is fully open.
Mono lever mixer
Output stage
Application range
Full load
All
» Turn the tap lever to the highest temperature.
» Fully open the tap.
» Increase the outlet temperature by closing the tap
slowly.
» Reduce the outlet temperature by adding cold water
or opening the tap further, if possible.
Following an interruption of the water supply
!
Material losses
Following an interruption of the water supply the ap
-
pliance must be recommissioned by carrying out the
following steps, in order to prevent the destruction
of the bare wire heating system.
»
Disconnect the appliance from the power sup
-
ply by removing the fuses/tripping the MCBs.
»
Open the tap for one minute until the appliance
and its upstream cold water inlet line are free of
air.
»
Switch the mains power back ON again.
5.
Cleaning, care and
maintenance
» Never use abrasive or corrosive cleaning agents. A
damp cloth is sufficient for cleaning the appliance.
» Check the taps regularly. Limescale deposits at the
spouts can be removed using commercially available
descaling agents.
6. 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/distribution panel.
The flow rate is too
low for switching on
the heating output.
The aerator in the tap
or the shower head is
scaled up or contam-
inated.
Clean and/or descale
the aerator or shower
head.
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 (000000-0000-00000):
Nr.: 000000-0000-00000
D
00000
41
61
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