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5.8.3. Temperature to switch on an aux. heat source (TH Set)
Preset temperature to switch on an aux. heat source (e.g. an electric heating element). The
heat source will switch on when the temperature at the reference sensor (depending on the
active request) drops below this value. In case of an active request, the reference sensor is
the DHW sensor (5.3.8.), in case of an active request for thermal store charging, the reference
sensor is the thermal store (buffer) sensor (5.1.16.).
5.8.4. Switch-on delay
The aux. heat source switch-on delay. If all other switch-on conditions are met, the heat
source will switch on after the time set here expires.
5.8.5. Switch-off hysteresis
The aux. heat source switch-off hysteresis. If the temperature at the reference sensor exceeds
the preset temperature (5.8.3. TH Set) + hysteresis, the aux. heat source will be switched off.
5.8.6. Ecomode
The Energy Saving Mode for an aux. heat source in case when solid fuel boiler or solar charge
is active. Either Shutdown (the aux. source will turn off completely) or Decrease options are
available. In the Decrease mode, the temperature Teco (5.8.7.) is used instead of TH Set
(5.8.3.).
5.8.7. Decreased switch on temperature for aux. heat source (Teco)
The set temperature for switching on an auxiliary heat source when the option Decrease is
selected and the Energy Saving Mode for an aux. heat source (5.8.6.) is active.
5.8.8. Heating compensation (HC compensation)
The desired heating water temperature reduction when the option Decrease is selected and
the Energy Saving Mode for an aux. heat source (5.8.6.) is active.
5.8.9. Heating rod periods
Time program for a heating element. For each weekday, three periods can be specified when
the aux. source function is active. The source will be switched on in these periods only when
the demand for switching from either DHW or a heating circuit is met and at the same time,
the desired temperature is not reached.
5.8.10. Anti Legionella
Switching on protection against Legionella bacteria (this function makes sense only for a
hot water storage tank). When this function is on, the controller will increase the desired
temperature for DHW heating in the preset time intervals to the temperature 5.8.10.2. AL Tref
using an auxiliary heat source.
This temperature will be kept by the controller at both the optional sensors (5.8.10.5., 5.8.10.6.)
during the period set by parameter 5.8.10.3. AL residence time. After the set period expires,
the date and time of the last AL heat is saved to parameter 5.8.10.4. Last AL heat.
5.11. Solid fuel boiler (function)
The menu is available only if the Solid fuel boiler function is assigned to an output in
menu 7. Special functions.
Switching on the solid fuel boiler pump when the difference between the boiler sensor and
storage sensor (typically a thermal store or a hot water storage tank) is exceeded.
5.11.1. Max. temperature of storage tank (Solid fuel boiler Tmax)
Maximum temperature at the storage sensor (5.11.6.) to stop the boiler pump. If the storage
tank temperature is above this value, the boiler pump remains stopped disregarded of the
other conditions.
