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Siemens Immersion temperature controller RLE132 CE1N3334en
Building Technologies 2015-03-06
•Control with boost
The following settings are required:
•Setpoint
•Control mode: A choice of 4 PI modes are available to suit the type of controlled
system (refer to chapter “Mechanical design”)
•P-band
The control signals of the heating zone controller (RVL4…, RVP3…, RVP2…) are
passed to the RLE132 which acts as a limiter.
1. If the temperature (e.g. the boiler return temperature) falls to a level 4 K above the
minimum limit value, the RLE132 interrupts the OPEN signals of the heating zone
controller. At the same time, it delivers CLOSE commands in the form of pulses to
the mixing valve’s actuator until the temperature rises again.
2. If the temperature falls to the minimum limit value, the RLE132 delivers a constant
CLOSE command to the mixing valve’s actuator until the temperature rises again.
3. If the temperature rises, the RLE132 releases the positioning commands of the
heating zone controller.
1. If the temperature (e.g. the flow temperature) rises to a level 4 K below the
maximum limit value, the RLE132 interrupts the OPEN signals of the heating zone
controller. At the same time, it delivers CLOSE commands to the mixing valve’s
actuator in the form of pulses until the temperature falls again.
2. If the temperature reaches the maximum limit value, the RLE132 delivers a
constant CLOSE command to the mixing valve’s actuator until the temperature falls
again.
3. If the temperature falls, the RLE132 releases the positioning commands of the
heating zone controller.
When using an outside sensor, the RLE132 provides outside temperature
compensation. If the outside temperature falls from +15 to –5 °C, the setpoint will be
continuously raised by 0 K to 26 K. Below an outside temperature of –5 °C, the
temperature increase will be kept constant.
Where the controller is mounted in an inaccessible location, a remote setpoint adjuster
BSG21.1 can be connected to the RLE132 (terminals R1–M), thus enabling the
setpoint to be adjusted from a remote location. In this case, the controller’s setpoint
setting slider must be set to EXT.
In operating mode Control with ECO, the nominal setpoint is reduced by closing an
external potential-free contact across terminals D1–M.
This ensures energy savings, e.g. through night setback of space heating controlled by
a time switch.
In operating mode Control with boost, the nominal setpoint is raised by closing an
external potential-free contact across terminals D1–M.
Mode of operation
