Connection Of An External Signal Transmitter; Settings; Emergency Shutdown ������������������������������������������� 8 16.5 Appliance Parameters; Weatherproof Cover ��������������������������������������������� 8 16.6 Standardised Output Data - STIEBEL ELTRON WWK 222 Operation And Installation

OpEraTiON

Settings

Material losses
!
At the factory, the appliance is fitted with rechargeable
batteries that ensure the power supply to the impressed
current anode in the case of a power failure.
In order for the impressed current anode to protect the
DHW cylinder in the appliance against corrosion, the ap-
pliance must not be disconnected from the power supply
for more than 16 hours if the DHW cylinder is filled with
water and the impressed current anode is not separately
connected to a continuous power supply.
If regular interruptions to the power supply are not an-
ticipated, the batteries will not require any maintenance.
Replace the batteries for the impressed current anode
every three years in the following cases:
- The impressed current anode is not separately con-
nected to a continuous power supply and a switch-
ing contact regularly interrupts the power supply to
the appliance.
- The security of supply is inadequate.
Failure to observe this point puts the appliance at risk
of damage.
Never use batteries that cannot be charged. Only re-
chargeable nickel metal hydride batteries (NiMH) are
permissible.
Batteries may be damaged in the appliance. Without a
power supply, the impressed current anode and the cyl-
inder would not be protected against corrosion.
3.6

Connection of an external signal transmitter

Note
This type of connection must only be carried out by a
qualified electrician.
External signal transmitters can be integrated via the built-in
contact input, e.g. a PV system to take advantage of electricity
generated on site.
The appliance has a second set temperature preselected at the
factory. This is activated when there is an external switching sig-
nal. Set temperature 2 takes priority over the standard set tem-
perature while there is an external switching signal. Following
a one-off activation (signal is present for at least 1 minute), set
temperature 2 applies for at least 20 minutes and takes priority
over set temperature 1.
You can change set temperature 2 on the appliance (see chapter
"Settings / Settings / Set temperature 2").
8 | WWK 222-302 H
4. Settings
Material losses
!
Optimum operation is achieved with the factory default
settings.
Any changes to these are strongly discouraged as they
may affect output, service life and compliance with reg-
ulations.
4.1 Emergency shutdown
In the event of an emergency, carry out the following steps:
f Disconnect the appliance from the power supply at the fuse f
in the domestic distribution board or by unplugging the
power plug.
f Shut off the cold water supply. f
4.2 Weatherproof cover
The programming unit is equipped with a weatherproof cover to
protect it from the elements.
f Carefully flip up the lid of the weatherproof cover. f
Two detents are provided so that you do not have to keep hold
of the lid.
To close, carefully press the lid onto the appliance until the locking
tabs at the sides lock in place.
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