ABB i-bus KNX Yucus YUB/U1.0.1 Series Technical Reference Manual page 147

KNX Technical Reference Manual
ABB i-Bus ® KNX Yucus
However, activation of the summer compensation requires an outside temperature sensor
that transmits its measured value to the bus and can be evaluated by the room
temperature controller.
The following parameters are available for summer compensation:
- "Lower outside temperature value for summer compensation",
- "Upper outside temperature value for summer compensation",
- "Lower setpoint offset for summer compensation",
- "Upper setpoint offset for summer compensation"
Above the "Upper outside temperature value", the minimum setpoint temperature for
cooling is the outside temperature minus the "Upper setpoint offset". The outside
temperature has no effect on the minimum setpoint temperature for cooling below the
"Lower outside temperature value". Between the "Lower" and "Upper outside temperature
value", the minimum setpoint temperature for cooling undergoes floating adjustment by
the parameterized setpoint temperature equal to the outside temperature minus the
"Lower offset" to a value equal to the outside temperature minus the "Upper setpoint
offset" as a function of the outside temperature.
Typical values for summer compensation are:
- 21°C: Lower outside temperature value
- 32°C: Upper outside temperature value
0 K: Lower setpoint offset
- 6 K: Upper setpoint offset
This means that a continuous increase of the minimum setpoint value for cooling occurs
to a value equal to the outside temperature minus a setpoint offset of 0 to 6 K if the outside
temperature increases to 32°C from 21°C.
For example:
For an increasing outside temperature, the minimum setpoint value for cooling will be
increase starting at an outside temperature of 21°C. The minimum setpoint temperature
for cooling is 25.1°C at an outside temperature of 30°C; 25.5°C at an outside temperature
of 31°C; 26°C at an outside temperature of 32°C; and 27°C at an outside temperature of
33°C.
12.34.123 Summer compensation – (Lower) Starting temperature for summer
compensation (°C)
Options Input from -127 to 127
Note: This parameter is only available if the "Device function" parameter is set
on either "Single device" or "Master device" and the "Summer compensation" parameter
is set to "Yes"
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