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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 29 Combination with PPS devices 27.05.2004
Operating mode
QAW50...
Operating mode RVD240
Automatic operation; temporary overriding with the economy
button of the QAW50... possible
Economy button off (lit): nominal room temperature
Economy button on (not lit): reduced room temperature
Standby
If the room unit overrides the controller’s operating mode, the operating mode button
on the controller flashes.
29.2.3 Knob for room temperature readjustments
...
Using the knob of the QAW50, the nominal room temperature setpoint can be read-
justed by a maximum of ±3 °C.
The adjustment of the room temperature setpoint on the controller will not be affected
by the QAW50... The controller generates the setpoint from its own room temperature
adjustment plus the readjustment made with the room unit.
29.2.4 Controller with operation lock
The room unit acts fully on the controller also when an operation locking function on the
controller has been activated (operating lines 195 and / or 196: Setting
>0).
29.3 Combination with room unit QAW70
29.3.1 General
Room unit QAW70, with room temperature sensor, time
switch, setpoint adjustment, knob for room temperature set-
point readjustments and economy button.
Using the QAW70, the following functions can be performed or actions achieved on the
RVD240:
• Overriding the operating mode
• Overriding the room temperature setpoints
• Overriding the d.h.w. setpoint
• Readjustment of room temperature
• Entry of weekday and time of day
• Changing the controller’s heating program
• Display of the actual values and the room temperature acquired by the controller
For this purpose, the QAW70 has the following operating elements:
• Operating mode button
• Economy button (also called presence button)
• Knob for readjusting the nominal room temperature setpoint
• Buttons for selecting the operating lines
• Buttons for changing the values
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