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6. Heating system control
Operating mode / rated value setting / actual value display
During normal operation the operating mode is displayed by the LEDs (Water heater / Heating)
The following can be adjusted by pressing the temperature selection button:
- Max. temperature for heating operation (adjustable by using the -/+ button, the va-
lue selected here also limits the maximum rated value transmitted via the OT bus
- Rated value for warm water (adjustable by using the -/+ button, an overlay with the
values from the OT bus is possible)
On/Off button
(Appliance „Off“ displays
water pressure)
Water heater comfort button
Off: (LED off) the heat exchanger is not held to temp.
On : (LED I) the heat exchanger is always held to temp
Eco: (LED clock) the water heater preparation is self-learning,
i.e. the heat exchanger is only held temporarily to temp
(e.g. switched off during the night)
Service button (if this button is pressed during normal
operation, the actual value of the current operating
mode of the boiler is displayed in the two-digit display)
Reset button
+ / - (change values)
6. Heating system control
6.1 Operating elements of the boiler control panel / basic control N4.4
Normally the user does not need to change the basic control settings.
All necessary settings have been adjusted by the installer or at the factory.
Operating Status Display in the Service Display
Operating Status
Off, water pressure display
The appliance receives voltage, the heating operation and the water heater mode are switched
off, but the freeze protection is active. The actual water pressure, which does not cause a reaction
in any of the operating modes, is displayed for information only.
Off, no heating requirement
The appliance is ready for operation and will be turned on immediately when there is a heating or
water heater requirement.
After-Run Time Pump in Heating or Hot Water Operation
After operating the boiler in the heating or water heater mode, the pump continues to run.
Target Temperature Reached
Should the desired target temperature including the potentially added offset be exceeded, the
burner turns off.
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