Assortment / System Description

Control function
Room operating mode determination
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The Comfort button on the QMX3 room operator units can also be used as a
temporary comfort function.
When configured for temporary presence function, the room user can activate
Comfort mode for 120 minutes (configurable) by pressing the button. Pressing
the button again will re-trigger the timer for 120 minutes.
The configurable Desigo System does not provide a scheduler to DXR2
automation stations. It can be created, however, on a PXC00-E.D (or other
Desigo PXC…-E.D) and combined with central functions of the Desigo System.
Optionally, schedulers from BACnet third-party devices can be used to control
rooms or central functions.
The scheduler for room occupancy controls the operating mode of a room or
group of rooms. Each renter or area in a building can define their own
occupancy and non-occupancy times and influence in this way energy
consumption.
The scheduler consists of one periodically controlled weekly program and an
exception day (holiday and vacation program) that overwrites the weekly
program.
Under normal operations, the scheduler switches between operating modes
Economy (unoccupied) and Pre-Comfort as the occupancy times preset by the
operator. Comfort mode is enabled locally by pressing the comfort button on
the room operator unit (occupied).
The example below illustrates a scheduler program for three possible building
occupancy states and the preset, actual operating mode and describes its
impact on HVAC. (For its impact on lighting and shading, please refer to table in
Example in section Room control by switching the operating mode.) You can
configure the DXR2 to adapt the response:
Building occupancy state Description Room operating mode
Building used Full availability of all plants.
Building enabled for use.
Impact of schedulers: Room
operator units are enabled.
Per scheduler, room occupancy
or room operator unit
Building not used Reduced availability of the
plants.
Impact of schedulers: Room
operator units are locked.
Use:
No building occupancy
temporarily planned. The
building must reach the
Comfort temperature within
hours.
Economy
Building Protection Setpoints are at levels required
to protect the building.
Impact of schedulers: Room
operator units are locked.
Use:
Extended building vacancy.
Protection
Temporary Comfort by
room operator unit
Control using the
scheduler
(on PXC00-E.D)