Appliance Description; Operation; Recommended Settings; Cleaning, Care And Maintenance - STIEBEL ELTRON DHB 18 STi Bedienung Und Installation

oPerATIoN

Appliance description

3. Appliance description
You can adjust the DHW outlet temperature via the temperature
selector. From a flow rate of approx. 3 l/min and above, the control
unit regulates the correct heating output, subject to the tempera-
ture setting and cold water temperature.
Heating system
The bare wire heating system has a pressure-tested plastic casing.
The heating system is suitable for (both) soft and hard water and
is largely resistant to scale build-up. This heating system ensures
rapid and efficient DHW availability.
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 for one minute, thereby protecting the heat-
ing system.
4. Operation
The DHW outlet temperature can be adjusted in 3 stages.
2
1
1 Hand wash basin (approx. 35 °C)
2 Shower / bath (approx. 45 °C)
3 Kitchen sink (approx. 55 °C)
f Turn the temperature selector to the required position. f
Should the outlet temperature fail to reach the required level with
the tap fully open and the temperature selector set to maximum,
then more water is flowing through the appliance than can be
heated by the heating element.
f Reduce the flow rate at the tap. f
20 | DHB STi
4.1
Thermostatic valve
If you operate the appliance with a thermostatic valve, we rec-
ommend that you set the temperature on the appliance to the
maximum level (kitchen sink). You can then select the required
temperature using the thermostatic valve.
Following an interruption of the water supply
!
5.
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.
3
6.
Problem
The appliance will not
start despite the DHW
valve being fully open.
Whilst hot water is being
drawn off, initially cold
water flows for a short
period.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate (000000-0000-000000).

Recommended settings

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 in the following sequence.
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 mains power back ON again. f

Cleaning, care and maintenance

Troubleshooting

Cause
There is no power.
The aerator in the tap
or the shower head is
scaled up or contami-
nated.
The water supply has
been interrupted.
The air sensor detects air
in the water and briefly
switches the heater off.
DHB ... STi
remedy
Check the fuses/MCBs in
your fuse box/distribu-
tion panel.
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.
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