OPERATION
Appliance description
4 |HDB-E AU www.stiebel-eltron.com
3. Appliance description
The appliance heats potable water that flows through it. When
a DHW valve is opened, the heater starts automatically as soon
as the start-up volume has been reached. The heating output
is determined and matched by the flow rate and the cold water
temperature.
Heating system
The heating system is suitable for soft and hard water areas and
ensures quick and efficient DHW provision.
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 heater shuts
down automatically for one minute, thereby protecting
the heating system.
4. Operation
The heating system of the appliance starts automatically and heats
the water as soon as you open the DHW valve at the tap.
Setting the domestic hot water temperature
Should the outlet temperature fail to reach the required level with
the draw-off valve fully open, then more water flows through the
appliance than can be heated by the heating system.
Reduce the flow rate with the draw-off valve.
Outlet capacities
Subject to season, different maximum mixed water and outlet
capacities can result from varying cold water temperatures (see
chapter "Installation/ Specification/ Data table").
Following an interruption of the water supply
See chapter "Installation/ Commissioning/ Restarting"
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 tap out-
lets 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/distribu-
tion panel.
Starting volume is not
achieved. The aerator
in the tap or the shower
head is scaled up or con-
taminated.
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/
Restarting").
Cold water flows briefly
while hot water is being
drawn.
The air sensor detects air
in the water and briefly
switches the heater off.
The appliance restarts
automatically after
1minute.
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):
HDB-E ..
Nr.: 000000-0000-000000
26�02�02�1366
HDB-E ... AU No. 000000-0000-000000