20
5.9.4 Control voltage
D0000038970
XD03
EVU Contact for Power-OFF command by the power supply uti-
lity (option)
Steuerung Control
Mi AUF Mixer open
Mi ZU Mixer close
HK2
Heating circuit 2 pump
This connection can only be used if the "UMV" connection
is not used.
Kühl Cooling (option) ; Output (230V) to activate the cooling
circuits
O/K Stove/fireplace (optional)
UMV
External diverter valve (for connecting a second DHW cy-
linder)
You can only use either the "UMV" connection or the "HC2"
connection. The "UMV" connection is activated if the "2nd
DHW cylinder" parameter has the value "ON". The "HC2"
connection is activated if the "2nd DHW cylinder" parame-
ter has the value "OFF".
SL
Quick-acting air vent valve (optional) : The SL terminal is a
230V input for activating ventilation by means of a push-
button.
FA
Window open (optional) : The FA terminal is a 230V output
for switching an automatically controlled window with pas-
sive cooling, for example.
5.9.5 POWER-OFF
XD03-EVU : Connect the signal from the power supply utility time
switch (see chapter „Commissioning/ Power-OFF“).
5.9.6 External pumps ( PWM )
Note
The power supply to the external pumps is not provided
via the appliance.
D0000038971
XD04
UP HK2 Control connection for the pump of heating circuit 2 (cont-
rol with 0-10V or PWM signal)
UP SOL Control connection for the solar circuit pump (control with
0-10V or PWM signal)
5.9.7 Connecting internal cables/leads
The cylinder temperature sensor and the power cable for the si-
gnal anode are routed out of the function module at the top l.h.
side. All cables/leads are identified accordingly.
1
D0000059866
2
1 Anode connection at the cylinder
2 Earth block
Connect the signal anode at the top of the cylinder. Route
the anode cable through the groove cut into the thermal
insulation.
Connect the earth cable to the earth block.
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