Control

Variant menu: System Definition > Solar Loop with Air Collectors > Control

Dialog System Definition > Solar Loop with Air Collectors > Control

  1. Go to the Control page. In the Solar Air Heating section, you can set the switch-on and switch-off values for the solar air-room heating. Typical values have been pre-entered in all the editable fields. Room heating always takes priority – hot water is only heated when room heating is not possible on account of temperature conditions.

    • Fan-Hysteresis Control
      • The fan switches on as soon as the outlet temperature of the air collector is higher than the calculated room temperature by the switch-on temperature difference in the part of the building whose heating is supported by solar air heating (normally 5–10 °C).
      • The fan switches off when it is either too hot in the room or as soon as the air from the air collector is too cold, i.e. a) if the outlet temperature of the air collector is lower than the building reference room temperature by the switch-off temperature difference (normally 2–5 °C, typically lower than the switch-on temperature difference), or b) if it is too warm in the room, b1) because the room temperature exceeds the maximum room temperature or b2) because the room temperature exceeds the maximum room temperature defined in the building use profile. Go to System Definition > Building > Use to edit use profiles. b3) In addition, you can enter a period at which the building target temperature is used for this comparison. Outside this time, the maximum room temperature given here is used.

  2. In the Solar Hot Water section, you can set the switch-on and switch-off values for the solar DHW heating. This section is only visible for applicable systems. Typical values have been pre-entered in all editable fields.

    • The fan switches on as soon as the outlet temperature of the air collector is higher than the calculated tank temperature for the solar DHW heating by the switch-on temperature difference (normally 9–13 °C).
    • The fan switches off as soon as the air from the air collector is too cold or if it is either too hot in the tank, a) because the outlet temperature of the air collector is lower than the tank temperature by the switch-off temperature difference (normally 2–6 °C, typically lower than the switch-on temperature difference), or b) because the tank temperature is higher than the maximum tank temperature stated here (normally 50–70 °C).