Setpoint For Frost Protection (Building Protection, Heating) - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Parameters
7.7.5

Setpoint for frost protection (building protection, heating)

This parameter is only visible if the device has been parameterized for heating and the Deactivated option
has not been selected for the Basic-stage heating parameter in the Application parameters parameter
window.
Options:
This parameter is used to set the temperature that is to apply in the Building Protection operating mode
in the type of operation heating.
This setpoint temperature also becomes active if the controller receives the information "Window open",
or is deactivated via the Request On/Off (Master) group object.
The controller does not change the type of operation to reach this temperature, instead it ensures this
temperature is not dropped below on a reduction in the actual temperature.
This setpoint is used to protect the building and the installation against damage, and at the same time
to prevent unnecessary energy wastage. For this reason the temperature should not be selected too low,
and also not too high.
An example of this aspect is the opening of a window: As long as the window is open, further heating will
waste energy. However, if the outside temperature is very low (e.g. 0 °C), the room temperature will
continuously approach this temperature. Here there is a risk of the installation freezing and also frost
damage to the equipment in the room. To prevent this situation from arising, the controller becomes
active again on reaching the temperature set and attempts to prevent dropping below this temperature.
However, if the setpoint for frost protection is selected too high, the controller starts this attempt
much earlier, e.g. at a time that is acceptable during normal airing, and wastes unnecessary energy.
138 2CDC508220D0211 Rev. A | VC/S 4.x.1
5...7...15 °C
Note
Note