Siemens RDUxxx Series Operating Instructions

Operating Instructions
RDU... – the temperature controller that allows you to easily set the room temperature you want. You have
2 choices. You can either rely on the factory settings or make adjustments that suit your individual needs.
Display
Display of actual
room temperature
Cooling valve open
Heating valve open
Normal operation
Energy saving mode
Buttons for setpoint adjustments
Warmer / colder
Adjustment of
temperature setpoints
Are your rooms too warm or too cold?
Normal operation
The + / - buttons allow you to increase or decrease the current room temperature setpoint in steps of 0.5 °C.
To do this, proceed as follows:
• Press or once
The setpoint display starts flashing
• Press the buttons again to change the room temperature setpoint
10 seconds after the last press, the new temperature setpoint will automatically be stored. The display stops flashing.
CE1B3061en / 05.02.2003
RDU...
Settings and operation
Display of current
room temperature
or new setpoint
Heating mode, Off, cooling mode
Subject to alteration
Changing from heating to cooling mode
/
Changing from normal operation to energy
saving mode
/
Operating mode
selector
(RDU50.2)
Energy saving mode
3061Z01en
Automatic changeover
With the RDU50.2, manual changeover modes selector
from heating mode, Off to cooling mode.
Off = out of operation.
Display shows that the heating output is active
Display shows that the cooling output is active
Changeover from normal operation to energy saving mode
takes place automatically via an external contact
(window switch / remote operation switch, etc.).
(Exception with type RDU50.2 in Off mode)
Display shows normal operation.
Display shows energy saving mode.
If you want to change the factory-set temperature
setpoints (16 °C for heating and 28 °C for cooling), follow
the procedure given below ("Changing the control
parameters").
Important:
The setpoint of energy saving mode can be set to Off.
This means that the controller is not active in energy
saving mode and the parameter display shows Off.
Risk of frost!
Siemens Building Technologies / HVAC Products