Operating instructions

21
System details/functions
Special functions
Maximum cylinder limit
Select SFĂ=Ă1 at the setting level.
The consumer connected to RĂ2 is
started if the selected maximum
cylinder temperature "SX" has been
exceeded.
Suppression of reloading by boiler
Select SFĂ=Ă2 at the setting level.
Systems with Vitotronic and
Calotronic control units with KM
BUS
Connection of the KM BUS to
terminals 7 and 8 in the solar control
unit.
Reloading of the DHW cylinder by
the boiler will be suppressed by the
solar control unit if the solar circuit
pump is operating.
Coding addressĂ"67" in the boiler
control unit defaults a thirdĂset DHW
temperature (setting range: 10 to
95ĂºC). This value must be below the
firstĂset DHW temperature.
The DHW cylinder will only be
loaded by the boiler (solar circuit
pump runs) if this set value cannot
be reached by the solar heating
system.
Systems with additional Viessmann
control units
(only in conjunction with connection
extension, see pageĂ22)
Reloading the DHW cylinder by the
boiler will be suppressed by the
solar control unit if the solar circuit
pump is operating. An approx. 10ĂK
higher actual DHW temperature is
simulated via a resistor in the
connection extension.
The DHW cylinder will only be
heated by the boiler (solar circuit
pump running) if this actual
temperature is not achieved by the
solar heating system.
5862Ă490ĂGB