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Room temperature controller | Floor temperature monitoring
The minimum and maximum limit temperatures the underfloor heating system is per-
mitted to reach are specified in the ETS via the parameters "Maximum permissible
floor temperature" and "Minimum permissible floor temperature". The temperatures
can be set to a value between 10 ... 45 °C. If the limit temperature is exceeded in
heating mode or fallen below in cooling mode, the controller switches the floor heat-
ing system off via the command value. As soon as the floor temperature has fallen
1 K below the limit temperature in heating mode or risen 1 K above the limit temper-
ature in cooling mode, the controller switches the command value on again, assum-
ing this is provided for in the control algorithm. The hysteresis 1 K is fixed.
The cyclical monitoring does not affect the "Heating" or "Cooling" message
telegrams. If the floor temperature exceeds or falls below the limiting value,
only the command value is switched off. In this case, the "Heating" or "Cool-
ing" message remains active.
Depending on the configuration, the temperature limiting can have a strong im-
pact on the controller behaviour. Poor parameterisation of the limit temperat-
ure (limit temperature near to the room/setpoint temperature) means that it is
possible that the specified setpoint temperature for the room can never be
reached.
The limiting temperatures for minimum and maximum are not checked for
plausibility. The following generally applies: "Minimum permissible floor tem-
perature" < allowed floor temperature range < "Maximum permissible floor
temperature".
10.8.1 Floor temperature monitoring parameters
Monitoring of
This parameter determines which operating mode the cyclical floor temperature
monitoring should be applied to. The monitoring can be limited to heating (maximum
floor temperature), cooling (minimum floor temperature), or heating and cooling.
Effect on
Depending on which heating or cooling circuit is used for the floor, this parameter
defines which level is affected by the floor temperature monitoring.
Heating
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Maximum floor temperature
Minimum floor temperature
Maximum and minimum floor temperature
Basic level
Additional level
Basic and additional level
Page 197 of 257
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