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16 | WWK222-302 H www.stiebel-eltron.com
INSTALLATION
Commissioning
10.4 Assembling the appliance
Note
Refit the appliance cover after completing your work. See
chapter "Maintenance and cleaning/ Fitting the appliance
cover").
11. Commissioning
11.1 Initial start-up
Note
Fill the DHW cylinder before switching on the power sup-
ply to the appliance.
The appliance is equipped with boil-dry protection to
prevent operation if the hot water cylinder is not com-
pletely full of water.
Note
Following an interruption of the power supply, the com-
pressor operation remains blocked for at least one min-
ute, during which the appliance goes through its initial-
ising process.
If the compressor subsequently fails to start, it may be
blocked by additional safety devices (motor overload
relay, high pressure switch). This block can last from 1
to 10 minutes.
11.1.1 Filling the DHW cylinder
Fill the DHW cylinder and vent the pipework by following the
procedure below:
Close the drain valve.
Open all DHW draw-off points and the shut-off valve in the
cold water supply.
Close the DHW draw-off points as soon as water starts to
emerge from them.
Check the safety valve by leaving it open until water runs out.
11.1.2 Settings / function check
In the delivered condition, the appliance is set to a DHW temper-
ature >61°C.
Switch the mains power ON.
Note
Following an interruption of the power supply, the com-
pressor operation remains blocked for at least one min-
ute, during which the appliance goes through its initial-
ising process.
If the compressor subsequently fails to start, it may be
blocked by additional safety devices (motor overload
relay, high pressure switch). This block can last from 1
to 10 minutes.
Check the function of the appliance.
Check the function of the safety assembly.
11.1.3 Appliance handover
Explain the appliance function to users and familiarise them
with its operation.
Make the user aware of potential dangers, especially the risk
of scalding.
Make users aware of critical environmental factors and re-
quirements concerning the installation site.
Inform users that water may drip from the safety valve dur-
ing the heat-up process.
Please note that the appliance is not protected against frost
and corrosion when it is disconnected from the power sup-
ply. At the factory, the appliance is fitted with rechargeable
batteries that ensure the power supply to the impressed cur-
rent anode in the case of a power failure. The batteries must
be replaced by a qualified contractor every three years, if the
power supply is regularly interrupted by a switching contact
or the security of supply is inadequate. We recommend a
maintenance contract for replacing the batteries.
Hand over these operating and installation instructions to
users for safekeeping.
11.2 Recommissioning
Note
Following an interruption of the power supply, the
compressor operation remains blocked for at least one
minute. The PCB delays electronic starting by a minute,
during which the appliance goes through its initialising
process.
If the compressor subsequently fails to start, it may be
blocked by additional safety devices (motor overload relay
and high pressure switch). This block can last from 1 to
10 minutes.
If the appliance is switched off due to an interruption to the power
supply, no specific measures for restarting are required once the
power supply has been restored.
12. Shutdown
!
Material losses
If you disconnect the appliance from the power supply, it
is no longer protected against frost or corrosion.
Only disconnect the appliance from the power sup-
ply for longer periods if you are also draining the
DHW cylinder. See chapter "Maintenance/ Draining
the appliance".
The appliance can only be switched off by interrupting the power
supply.
Disconnect the appliance from the power supply at the MCB/
fuse in the domestic distribution board or by unplugging
from a general purpose outlet.
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