Room Temperature Measurement - Gira 5142 00 Product Documentation

4.2.4.2.6 Room temperature measurement

Basic principles
The room temperature regulator periodically measures the actual temperature of the room and
compares it with the given setpoint temperature of the active operating mode. The control
algorithm calculates the adjusted command value from the difference between actual and
setpoint temperatures. In order to ensure a fault-free and effective room temperature control, it
is very important to determine the exact actual temperature.
The room temperature controller possesses an integrated temperature sensor, using which the
room temperature can be detected. Alternatively (e.g. if the room temperature controller has
been installed in an unfavourable location or operates in difficult conditions, for example, in a
moist atmosphere) or in addition (e.g. in large rooms or halls), a second temperature sensor
linked via bus telegrams can be used to determine the actual value. This second sensor can
either be a room temperature controller coupled via the KNX/EIB or a controller extension with
temperature detection. Alternatively, it is possible to connect a wired remote sensor directly to
the bus coupling unit of the device.
When choosing the installation location of the controller or the external sensors, the following
points should be considered...
- The controller or temperature sensor should not be used in multiple combinations,
especially together with flush-mounted dimmers.
- Do not install the temperature sensor in the area of large electrical consumers (avoid heat
influences).
- The push button sensor should not be installed in the vicinity of radiators or cooling
systems.
- The temperature sensor should not be exposed to direct sun.
- The installation of sensors on the inside of an outside wall might have a negative impact on
the temperature measurement.
- Temperature sensors should be installed at least 30 cm away from doors, windows or
ventilation units and at least 1.5 m above the floor.
i Room temperature measurement by the device is always active, irrespective of the "Room
temperature control" or "Controller extension" functions and can thus be used
independently (e.g. for simple measurement and indication of a room temperature without
feedback control).
Temperature detection and measured value formation
The "Temperature detection" parameter in the "Room temperature control -> Controller general
-> Room temperature measurement" parameter node specifies the sensors to detect the room
temperature. In the case to two control circuits the temperature detection of the two circuits can
be configured to the various temperature sources independently of each other using separate
parameters. In this manner, temperature detection of the control circuits can be either different
or the same.
The following settings are possible for temperature detection
- "internal sensor"
The temperature sensor integrated in the room temperature controller is activated. Thus,
the actual temperature value is determined only locally on the device.
In this configuration, the feedback control will start directly after a device reset.
Order No. 5142 00
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Software "Push button sensor 3 plus"
Functional description
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