ABB Busch-priOn Series Technical Reference Manual page 20

KNX Technical Reference Manual
®
Busch-priOn
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Winter compensation
To improve comfort and to keep the temperature difference when entering a room with large window areas in comfortable
limits, an increase of the room temperature, as a function of the outside temperature, should be performed during the winter
(winter compensation). The room temperature is raised by adjusting the "Heating setpoint comfort mode".
However, similar to summer compensation, winter compensation makes an external temperature sensor necessary that
sends its measured value to the KNX for evaluation by the room thermostat with display.
The following parameters are available for winter compensation:
• "Winter compensation lower outside temperature value"
• "Winter compensation upper outside temperature value"
• "Winter compensation lower setpoint offset"
• "Winter compensation upper setpoint offset"
The value of the lower and upper temperature is used to specify from and to which temperature value a setpoint correction is
to be made.
The lower and upper setpoint offset is used to specify by how many Kelvin the setpoint specified in the parameters or by the
user via a manual shift is to be adjusted during winter compensation.
Typical values for the winter compensation are:
• 0 °C: lower outside temperature value
• 10 °C: upper outside temperature value
• 4 K: lower setpoint offset
• 0 K: upper setpoint offset
That means that a flowing setpoint increase from 0 to 4 K occurs if the outside temperature falls from 10 °C to 0 °C.
Example:
In the lower diagram 21 °C has been parameterized for "Heating setpoint comfort". When the outside temperature falls, the
parameterized setpoint is raised starting from an outside temperature of 10 °C flowing from 21 °C to 25 °C. The 25 °C are
reached at an outside temperature of 0 °C. After this the setpoint is no longer raised even though the outside temperature
continuous to fall.
Note:
When compensation is active, CO is shown on the display.
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