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Mounting and installation
Wiring
Commissioning
RDX33...
Commissioning
RDX43...
Compressor-based
application
Sensor calibration
Setpoint and setting
range limitation
Siemens
Building Technologies
The room temperature controller is to be mounted on a wall, not in niches or book-
shelves and not behind curtains. Temperature acquisition must not be adversely af-
fected by heat or cooling sources or direct solar radiation. Mounting height is about 1.5
m above the floor.
The controller can be fitted on a recessed conduit box.
Also refer to Mounting Instructions M3075 enclosed with the controller.
• Wiring, fuse and earthing must be installed in compliance with local regulations. It
must be made certain that safety extra low-voltage lines (SELV circuit) are clearly
separated from AC 230 V mains voltage cable
• The cables to the controller carry AC 230 V mains voltage and must be appropriate
sized
• The AC 230 V mains supply line must have an external fuse or circuit breaker with a
rated current of no more than 10 A
After wiring the base and attaching the controller to the base (see Mounting instruc-
tions), remove the battery compartment from the controller until the display is blank.
The controller synchronizes its outputs as soon as the battery compartment is rein-
serted. Then, the controller is ready to be commissioned by qualified staff. The control
parameters of the controller can be set to ensure optimum performance of the whole
system (also refer to "Parameter settings").
After applying power, the controller makes a reset during which all LCD segments blink,
indicating that the reset has been correctly made. This takes about 3 seconds. Then,
the controller is ready to be commissioned by qualified staff. The control parameters of
the controller can be set to ensure optimum performance of the whole system (also
refer to "Parameter settings").
• If the controller is used in conjunction with a compressor, the minimum on time (pa-
rameter P11) and off time (parameter P12) must be correctly adjusted in order not
to adversely affect the compressor's service life
• If the room temperature displayed by the controller does not accord with the room
temperature effectively measured, the temperature sensor can be recalibrated. In
that case, parameter P07 must be changed
• For comfort and energy saving reasons, it is recommended to check the setpoints
and setpoint setting ranges (parameters P01...P06) and, if necessary, to change
them accordingly
Room temperature controllers with LCD
11/14
N3075en
17.04.2009
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