ABB Busch-priOn Series Technical Reference Manual page 17

"Setpoint heating" is the default setting. In regions where the cooling function is more important, it is recommended that you
change this parameter to "Setpoint cooling". This makes it easier to set the room thermostat and raise the cooling setpoint
(standby temperature cooling and night setback cooling).
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Individual setpoints
When individual setpoints are used, individual setpoints are defined for each operating mode ("Heating setpoint comfort
mode", Heating setpoint standby", "Heating setpoint night mode", "Cooling setpoint standby" and "Cooling setpoint night
mode".
Different to the dependent setpoints, the individual setpoints are also maintained after a manual setpoint shift. For example,
when the user has effected a setpoint shift of the parameterized temperature "Heating setpoint comfort mode" upward or
downward, the parameterized value "Heating setpoint standby" will always be called up when standby mode is activated.
This means that only the fixed setpoints that are stored will be called up for the individual operating modes.
The user can manually change the parameterized setpoints via the two buttons "Raise temperature" or "Lower temperature".
The change between "Heating setpoint comfort mode" and "Cooling setpoint comfort mode" is made via a long press
(approx. 1 sec.) of button "Raise temperature" to heating setpoint and on button "Lower temperature" to cooling setpoint.
The specified setpoints can be changed as often as desired via the bus also without the ETS. For this, a 2-byte temperature
value must be sent to the corresponding communication object "Setpoint heating comfort", "Setpoint heating standby",
Setpoint heating night mode", "Setpoint frost protection", "Setpoint cooling comfort", "Setpoint cooling standby", "Setpoint
cooling night mode" or "Setpoint heat protection". The values received are stored in the memory of the device and are
retained in case of bus power failure and subsequent return of bus voltage. This makes it possible to send new setpoints to
the device via a visualization when the use of a room changes, for example. New parameterization is not required.
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Minimum distance
The adjustable parameter "Minimum distance between heating and cooling" is active both for the dependent and the
individual setpoints.
The minimum distance is always between "Heating setpoint comfort mode" and "Cooling setpoint comfort mode". It serves as
a buffer zone to prevent the the two setpoints from interfering with each other.
Example:
Individual setpoints has been selected. The "Heating setpoint comfort mode" is 21 °C and the "Cooling setpoint comfort
mode" is set on 26 °C. The dead zone between heating and cooling is 3 K. If a heating setpoint is now shifted upwards, the
dead zone also shifts upwards. If the shift exceeds a temperature of 23 °C, the "Cooling setpoint comfort mode" will also
shift upwards so that a minimum distance of 3 K is always guaranteed between heating and cooling.
If a cooling setpoint is shifted downwards, the dead zone also shifts downwards. If the shift exceeds a temperature of 24 °C,
the "Heating setpoint comfort mode" will also shift downwards so that a minimum distance is also guaranteed in this case.
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KNX Technical Reference Manual | 0073-1-7388 | 17