Data Sheet for Product

6
Siemens
A6V10889950_en--_j
Smart Infrastructure
2022-01-05
Commissioning
After powering up, the thermostat resets and all LCD segments light up for about 3 seconds.
Afterwards, the room temperature is displayed (factory setting) and the unit is ready for
commissioning by qualified HVAC staff.
The thermostat’s control parameters can be adjusted to ensure optimum performance of the
entire system (see “Parameter settings”).
Surge protection at power-up
When the thermostats are powered up, LCD display and key buttons work normally except
all valve and fan outputs, e.g., Q1, Q2, Q3, Y1, Y2, Y12, Y14.
The outputs of thermostats start up at random to protect the mains from overload. It may
take up to two minutes
*)
before all outputs of thermostats work properly.
Note:
*)
If the room thermostat uses the mains supply from a hotel Room Control Unit (RCU), less
startup time (e.g. < 3 seconds) is more suitable for this type of hotel applications. Please add
a special note to request for RDF510/RDF530 products with firmware revision D or above.
Sensor calibration
The thermostat has an internal sensor for accurate temperature display. If the temperature
display is influenced by its installation location, calibrate the sensor via parameter P05 to
adjust the readings.
Setpoint and range limitation
For comfort and energy saving reasons, we suggest to review the setpoints and setpoint
ranges (parameters P09, P10, P65 and P66) and change them as needed.
Manual heating/cooling changeover
If the thermostat is enabled for “H/C changeover manual” via parameter P01=2 (factory
setting for RDF510), press the “H/C changeover” button to display the currently selected
control sequence on the LCD. Press again to change the control sequence. The newly
selected control sequence is displayed and executed after the thermostat returns to On
mode.
If the thermostat is set to “Cooling only” or “Heating only” via parameter P01, the manual
changeover function is not available. Press the “H/C Changeover” button to display only the
current control sequence on the LCD.
Control sequences
On/Off control
On 2-pipe applications, the thermostat controls an On/Off valve in heating/cooling mode with
manual changeover (P01 = 2, factory set).
RDF510
Heating mode
Cooling mode