Solar flow sensor B63: This sensor is required for the solar yield
measurement.
Solar return sensor B64: This sensor is required for the solar yield
measurement.
Function input H1 (5950) Function input H4 (5970) and
Function input H5 (5977)
Notice
Not all setting options are available for all H-inputs.
None: No function.
Optg mode change HCs+DHW: Operating mode changeover for heating
circuits to reduced or protection operation (prog. no. 900, 1200, 1500)
and blocking of DHW heating if contact at Hx is closed.
Optg mode changeover DHW: Changeover of the domestic water
charging when contact Hx is closed.
Optg mode changeover HC1 to Optg mode changeover HC3: Operating
mode changeover for heating circuits to protection or reduced operation.
Important
Locking of domestic hot water charging is only possible under the
setting Optg mode change HCs+DHW.
Heat generation lock: The boiler is locked if contact at Hx is closed.
Depending on parameter 2305, the domestic hot water and consumer
circuits are blocked.
The boiler is not blocked for the following functions:
Chimney sweep function
Controller stop function
Manual mode, 0 to 10 V output request
Boiler frost-protection function
Error/alarm message: Closing the input Hx results in a control unit-
internal fault message, which will also be signalled via a relay output
programmed as an alarm output or in the remote management system.
Consumer request VK1/Consumer request VK2: The set flow
temperature setpoint is activated via the connecting terminals (e.g. a
ventilation heater function for door curtain units).
Important
The setpoint is set under prog.no. 1859/1909.
Release swi pool source heat: activation triggers heating of the
swimming pool by the heat source.
Excess heat discharge: Active excess heat discharge enables, for
example, an external source to force consumers (heating circuit, DHW
storage tank, Hx pump) to draw off excess heat with a signal. For each
consumer the parameter excess temperature discharge can be set to
determine whether the forced signal is taken into account and should
therefore take part in the heat discharge or not.
Release swi pool solar: This function enables the solar swimming pool
heater to be released externally (e.g. via a manual switch) or the solar
charging priority to be specified as compared to the storage.
Operating level DHW/Operating level HC1/Operating level HC2/
Operating level HC3: The operating level can be set via the contact
instead of via the internal time program (external time program)
Room thermostat HC1 to Room thermostat HC3: With the input a room
thermostat request can be generated for the set heating circuit.
Important
The quick decrease should be switched off for the corresponding
heating circuits.
DHW thermostat: Connection of the DHW thermostat.
Pulse count: By querying the input the low frequency pulse, e.g. for flow
measurement is recorded.
Checkb sign flue gas damper: Feedback via input H1 in case of
activated flue gas damper control.
9 Settings
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