Assortment / System Description

Control function
Room operating modes
11
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11 Control function
11.1 Room operating modes
The operating states Comfort, Pre-Comfort, Economy, and Protection are
available to the application functions on the DXR2 automation station. The
room operating modes apply for the entire room and are superposed for the
three disciplines HVAC, lighting, and shading. In other words, the response of
HVAC, lighting, and blinds applications are taken from it. The response can be
configured for each room and each discipline. The response for any one
discipline to a change in operating mode can also be configured.
Comfort is the operating mode in an occupied room. The room temperature is
within the Comfort range. The room controller works in the heating and cooling
sequence with the effective Comfort setpoints. Lighting control is enabled and
the blinds automatic ensures anti-glare.
Pre-Comfort is the operating mode during regular building occupancy, but in an
unoccupied room. A scheduler enables this operating mode by default. The
room user or automatic switches to the Comfort state and back during
occupancy. In this operating mode, HVAC control uses setpoints that are
slightly above the Comfort setpoint for heating and slightly below for cooling.
Lighting control is disabled. Blind automatic is set to anti-glare in anticipation
of pending occupancy.
Economy is the operating mode outside building occupancy with setback level.
In the Economy room operating mode, HVAC control uses setpoints that are
slightly under the effective Pre-Comfort setpoint for heating and slightly above
for cooling. During night setback or over the weekend, the scheduler can
control to the Economy state and those strongly lower energy supply to the
room. Lighting control is disabled in this operating mode and the blinds are
automatically deployed to an energy-efficient position.
If the building is unoccupied over an extended period of time (e.g. no renter,
vacation), the temperature setpoints can be reduced or raised even more so
that the building and all equipment are protected against heat or cold at any
time. In this operating mode, lighting control is disabled and the blinds are
closed.
11.2 Room operating mode determination
The present operating mode of the room depends on the central scheduler and
local influences such as the room operator unit.
DXR2 applications support the use of the Comfort button on the QMX3 room
operator unit as a presence function.
When configured for presence function, the application changes from
Automatic to Comfort mode when pressing the Comfort button. Re-pressing the
button will toggle back to previous state, otherwise a default timer will time out
after 120 minutes (configurable).
Comfort
Pre-Comfort
Economy
Protection
Presence control by
room operator unit