ABB Busch-priOn Series Technical Reference Manual page 19

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Summer compensation
To save energy and to maintain a reasonable temperature difference when entering an air-conditioned building, the room
temperature should be adjusted in relation to the external temperature (summer compensation according to DIN 1946). The
room temperature is raised by adjusting the "Cooling setpoint comfort mode".
Raising the room temperature does not, however, mean that you heat up the room. Rather the adjustment is intended to
allow the room temperature without cooling to increase to a specified value. This prevents the cooling system from further
reducing the room temperature to 24 °C with an external temperature of 35 °C.
However, the activation of summer 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 summer compensation:
• "Summer compensation lower outside temperature value"
• "Summer compensation upper outside temperature value"
• "Summer compensation lower setpoint offset"
• "Summer 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 summer compensation.
Typical values for the summer compensation are:
• 20 °C: lower outside temperature value
• 32 °C: upper outside temperature value
• 0 K: lower setpoint offset
• 4 K: upper setpoint offset
That means that a flowing setpoint increase of 0 to 4 K occurs if the outside temperature increases from 20°C to 32°C.
Example:
In the lower diagram 25 °C has been parameterized for "Cooling setpoint comfort". When the outside temperature rises, the
parameterized setpoint is raised starting from an outside temperature of 20 °C flowing from 25 °C to 29 °C. The 29 °C are
reached at an outside temperature of 32 °C. After this the setpoint is no longer raised even though the outside temperature
rises.
Note:
When compensation is active, CO is shown on the display of the room thermostat.
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KNX Technical Reference Manual | 0073-1-7388 | 19