Each room has 8 different room temperature setpoints for the room temperature: One heating and cooling setpoint each for operating modes Comfort, Pre-Comfort, Economy, and Protection. The setpoints can be configured on the DXR2 room automation station. The heating and cooling setpoints for Pre-Comfort correspond to a configurable difference for comfort setpoints.

Figure: Heating and cooling setpoints for various operating modes

Depending on the actual room operating mode, one setpoint each is selected for heating and cooling and used for control.

Setpoint setting on room operator unit

The room temperature setpoints can be operated on the room operator unit.

An increase in room temperature acts on:

  • Both Comfort setpoints (heating/cooling)
  • Both Pre-Comfort setpoints (heating/cooling)

An decrease in room temperature acts on:

  • Both Comfort setpoints (heating/cooling)
  • Both Pre-Comfort setpoints (heating/cooling)

You can set the setpoint display as well as possible intervention by the room user when configuring the room operator unit.

The room operator unit cannot influence the heating and cooling setpoints for Economy or Protection.

Comfort setpoints as seasonal compensation

The Comfort setpoints for temperature control in the room is mapped in the central function for seasonal compensation. The central seasonal compensation (setpoint shift based on outside temperature) causes a gradual increase in room temperature as a function of the outside temperature. This prevents too great a difference between the indoor and outdoor temperature in summer and increases overall comfort in winter.

These values are transferred to the rooms via a group. In the room, the transferred values are displayed on these two BACnet object:

Description

Name

Setpoint heating comfort.

SpHCmf

Cooling setpoint for comfort.

SpCCmf

Comfort setpoints
directly for the room

A default command can be made on the BACnet objects listed above if setpoints for Comfort are to be set directly in the room without influence from the central function:

Description

Name

Default value

Default command for heating setpoint for Comfort

DefCmd for SpHCmf

21 °C

Default command for cooling setpoint for Comfort

DefCmd for SpCCmf

24 °C

Setpoint configuration

The temperature setpoints can be configured on the DXR2.

Description

Name

Default value

Delta heating setpoint for pre-comfort

DSpHPcf

1 K

Heating setpoint for economy

SpHEco

15 °C

Heating setpoint for protection

SpHPrt

12 °C

Delta cooling setpoint for pre-comfort

DSpCPcf

1 K

Cooling setpoint for economy

SpCEco

35 °C

Cooling setpoint for protection

SpCPrt

40 °C

Setpoint setting in Desigo CC

The Comfort, Economy and Precomfort setpoints can be adjusted separately for each room for the heating and cooling sequences centrally from the Desigo CC management platform. Adjusting the Comfort setpoint also changes the Pre-Comfort setpoint.

The setpoints Economy and Protection as well as the set difference for Pre-Comfort values can be adjusted in Desigo CC via the web server access of the individual DXR2 automation stations.