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Siemens Desigo RXB Technical Manual Page 75

Technical manual.
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Operator controls and
display panel
Note
Button for selecting
the operating mode
and fan speed
Button for adjusting
the room temperature
setpoint
LCD panel
Siemens
Building Technologies
1640Z03
The controller determines the actual functions of the buttons and display (based on the
selected application and the associated parameters). The following describes all the
functions of the elements illustrated.
This button can be used like an occupancy button to determine the operating mode.
Three manual fan speeds can also be defined.
Pressing the left arrow once selects the option one step to the left, and pressing the
right arrow once selects the option one step to the right. The currently active operating
mode or the manually selected fan speed is indicated by a bar above the relevant
symbol.
When the button is pressed for the first time, the LCD display switches from room
temperature to setpoint display. Each additional operation of the upper or lower button
increases or reduces the setpoint by 0.5 K or 1.0 °F (the engineering unit is predeter-
mined by the controller). The maximum possible adjustment range is also defined by
the controller.
The following display options are possible in normal operation (actual options
determined by the controller).
For details refer to the application description for the controller range concerned.
For information on parameter-setting refer to the technical manual, documents
CM110389 (RXB) and CM110789 (RXL).
QAX34.3 – Room unit with PPS2 interface
Display of actual room temperature or adjustment value, and bar
indicating sequence (heating/cooling), operating mode and fan
speed.
1
+
Buttons for room temperature and setpoint adjustment
2
Symbols for operating mode and fan speed
3
Buttons for operating mode and fan speed
Symbols for the sequence (heating/cooling)
4
5
Room temperature in °C (resolution 0.5 °C)
Room temperature in °F (resolution 1.0 °F)
Setpoint adjustment displayed in digits
(Displayed only while adjusting the relative setpoint)
Scale and digits
(Displayed only when adjusting the absolute setpoint)
Cooling sequence is active
Heating sequence
(If the bar is not shown against either sequence,
then the controller is operating the dead band)
Economy operating mode
Automatic fan control
Comfort operating mode
Automatic fan control
Comfort operating mode
Manual fan control, fan speed 1
3/8
CM2N1640en_04
30 Jun 2009

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