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PLI: Power Limit 1/2
This thermostat complies with EN 50559 (VDE 0705-
559) for electrical floor heating The regulation applies to
electrical floor heating with a maximum floor weight of
4 kN/m² To ensure that hotspots due to unintentionally
covering up the surface are avoided, the heating function
can be time-limited as per EN/DIN
Note that this function is not applicable to other heating
applications such as wall and/or ceiling heating if it can
be foreseen in advance that unintentional covering up of
floor area might occur In this case it would be important
to assess the correct period of time for which the floor
heating must be time-limited
The heating can be limited by a set number of minutes
per hour The thermostat will then divide the given number
of minutes per hour into 3 periods, depending on the
thermostat’s actual PWM cycle
Example:
If obstacles could be present that cover up the floor,
then the heating might need to be limited by a number of
minutes so as to avoid hotspots on the floor
If you want the thermostat to provide heat a maximum of
90% of the time, then the thermostat should be limited by
10% Ten per cent of one hour is 6 minutes
