Siemens RDF302 Operating Instructions page 2

Button lock
Press operating mode button
manual button lock is configured (parameter P14 = 2).
The thermostat automatically locks the buttons 10 seconds after the last
adjustment if "Auto lock" is configured (P14 = 1).
The key symbol indicates locked buttons.
Notes: The button lock cannot be released (unlocked) once the buttons were
locked by the master through the Modbus command.
Reminder to clean filters and for external faults
This message reminds you to clean your HVAC equipment filters.
FIL *
It is displayed after ............ "fan operating hours" and disappears when the
thermostat is set to Protection ( ).
These messages inform you on external faults *:
AL1 *
AL1 : ...........................................
AL2 *
AL2 : ...........................................
Recalibrating the sensor
If the room temperature displayed by the thermostat does not agree with the
temperature effectively measured (after min 1 hour of operation), the
temperature sensor can be recalibrated through parameter P05.
Note: energy saving mode
The energy saving setpoints are factory-set to 15 °C for heating and 30 °C for
cooling. Use parameters P11 and P12 to adjust the values.
Important: You can set these setpoints to OFF; the thermostat then is
inactive, i.e. no protective heating or cooling function.
Risk of frost!
Commissioning
You can adjust a number of different control parameters to adapt the thermostat to your
system and optimize control performance. You can do this during operation either via the
buttons on the thermostat or using a commissioning tool via Modbus.
Baud rate and parity
The Baud rate can be adjusted to 4800 bps, 9600 bps, 19200 bps (factory
setting) or 38400 bps. The Parity can be set to none, odd or even (factory
setting). Your HVAC installer can set them through the additional
parameters.
Important: Once you made any changes on the baud rate or parity, you must
reset the power before the changes become effective.
* Needs to be configured by your HVAC installer
CE1B3079en / June 14, 2011
for 5 seconds to lock or unlock the buttons if
Control parameters
Proceed as follows to change the most important control parameters (your HVAC installer can set additional parameters):
1. Press the – and + buttons simultaneously at least 3 seconds.
Release, and within 2 seconds, press + again for 3 seconds. "P01" is displayed.
2. Repeatedly press the + or – button to select the required parameter.
-
+/–
3. Press + and – simultaneously. The current value of the selected parameter begins to flash, allowing you to
change the value by repeatedly pressing + or –.
4. The next parameter is displayed when you press + and – again simultaneously.
5. Repeat steps 2 to 4 to display and change additional parameters.
6. Press + or – until "End" is displayed, and then press + and – simultaneously to save the change and exit
parameter entry mode.
Parameter Description
P01 Control sequence
P02 Mode selection by user via operating mode button
P04 Selection of °C or °F
P05 Sensor calibration
P06 Standard temperature display
P07 Additional user information
P08 Comfort basic setpoint
P09 Minimum setpoint limitation in Comfort
P10 Maximum setpoint limitation in Comfort
P11 Setpoint of heating in Energy Saving
P12 Setpoint of cooling in Energy Saving
P13 *** Electrical heater in cooling mode
Button lock
P14 (Press operating mode button for 5 seconds to lock
or unlock the buttons)
*** Parameter P13 is only displayed for application "2-pipe with electric heater".
All temperature settings are in increments of 0.5 °C.
Subject to change
-
- -
Factory setting Setting range
0 = Heating only
2-pipe: [0...3]
1 = Cooling only
1 (Cooling only)
2 = Manual Heating or Cooling
4-pipe: [2...4]
3 = Auto Changeover
4 (Heating & Cooling)
4 = Heating & cooling
1 = Comfort, Protection
1 (Comfort, Protection) 2 = Comfort, Energy Saving,
0 = °C
°C
1 = °F
-
0.0 °C 3...3 °C
0 = Room temperature
0 (Room temperature)
1 = Setpoint
0 = No display
1 = Temperature in °C/°F
2 = Outside temperature
0 (no display)
3 = Time of day (12 h, via bus)
4 = Time of day (24 h, via bus)
21 °C 5...40 °C
(Wmin ) 5 °C 5...40 °C
Comf
(Wmax ) 35 °C 5...40 °C
Comf
(Wheat ) 15 °C OFF, 5 °C...Wcool
Eco
(Wcool ) 30 °C OFF, Wheat
Eco
OFF = disabled
ON
ON = enabled
0 = Disabled
1 = Auto lock
0 (Disabled)
2 = Manual lock
- -
Adjustment
Protection
(via bus)
Eco
...40 °C
Eco
Please record all changes you make!
Siemens Building Technologies