CE1B3061en / 05.02.2003 Subject to alteration Siemens Building Technologies / HVAC Products
Commissioning (by qualified HVAC staff)
Para-
meter Controller’s parameter factory settings: Setting range
(all settings can be made in increments of 0.5 K) RDU20 RDU50 RDU50.2
P01 Setpoint of heating in energy saving mode
(operating mode changeover switch activated) 16 °C0: corresponds to Off (display Off) 5…18 °C
P02 Setpoint of cooling in energy saving mode
(operating mode changeover switch activated) 28 °C0: corresponds to Off (display Off) 24…35 °C
P03 Minimum setpoint limitation in normal mode 5 °C5…20 °C
P04 Maximum setpoint limitation in normal mode 35 °C21…35 °C
P05 Heat-cool changeover switching point cooling 16 °C10…25 °CX
P06 Heat-cool changeover switching point heating 28 °C27…40 °CX
P07 Sensor calibration 0 K -3…+3
P08 P-band in heating mode 2 K 0.5…+4 K
P09 P-band in cooling mode 1 K 0.5…+4 K
Integral action time X
P10 Integral action time (only with modulating PI control, DIP switch no. 2 is set to ON) 5 min. 1…10 min. (increments of 1 min.) XX
Minimum output limitation in cooling mode (normal operation) 0 % 0...100 % (increments of 10 %) X
P11
Actuator running time (only with modulating PI control, DIP switch no. 2 is set to ON) 150 s 50...150 s (increments of 10 s) XX
P12 Active temperature sensor (no setting, display only) -1: room temperature sensor active
2: return air temperature sensor active
P13 Value of current room temperature reading (no setting, display only) -0…49 °C = current temperature value
P14 Value of current heat-cool changeover temperature reading including indication of current
mode ( ,) (no setting, display only) -
100 = input open (no sensor connected, heating mode ( ))
0…49 °C = current temp. value
00 = input bridged, cooling mode ( )
P15 Test mode for checking the actuator direction (note that this parameter can be quit only if the
setting is back at “---” and by pressing buttons + and – simultaneously) ---
“---“ = no signal on outputs Y1 and Y2
OPE = output Y1 forced open
CLO = output Y2 forced open
XX
Changing the control parameters
(To optimize the control performance, a number of control parameters
can be adjusted. This can also be made during operation without
opening the controller.
Do you want to change the control parameters of the heating and / or
cooling setpoints in the normal or energy saving mode? Or do you
want to increase / decrease the switching differential in heating and
cooling mode?
Then, proceed as follows:
(For factory settings, see above under “Commissioning)
1. Normal operation mode
2. Press the + and – buttons simultaneously for a min. of 3
and a max. of 5 seconds. Release them and within 2
seconds, press the + button again for 3 seconds. The
display will show “P01”.
3. Select the required parameter by repeatedly pressing
the + or – button:
P01 P0 2 P14 P15
+-+-+
--
+
3055z01
4. Press the + and – buttons simultaneously, the current
value of the selected parameter appears, which can
be changed by repeatedly pressing the + or – button.
5. By pressing buttons + and - simultaneously again or
5 seconds after the last press of a button, the last
parameter will be displayed again.
6. If you wish to display and change additional
parameters, repeat steps 3 through 5.
7. 10 seconds after the last display or setting,
all changes will be stored.
If the room temperature displayed by the controller does not agree with
the temperature effectively measured, the temperature sensor can be
recalibrated. For that purpose, parameter P07 must be changed
Proceed as described under “Changing the control parame-
ters” and follow steps 1 through 3 to select parameter P07.
With step 4, the room temperature displayed can now be
matched to the temperature effectively measured. Each push
of the + or – button changes the temperature by + or –
0.5 °C up to a maximum of + / - 3 °C.
With step 7, the recalibration is automatically stored 10
seconds after the last readjustment.
Legend to table
Adjustable:please record all changes you make
Not adjustable / display only
XNot adjustable / no display
