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82 EQJW146F002 EN
Functions of the heating circuit
6.3 Underfloor heating/drying of jointless floors
Using function block setting CO1, 2 > F05 - 1, the respective heating circuit is configured as
an underfloor heating circuit. In doing so, the controller at first only limits the value ranges of
the heating characteristic gradient and the maximum flow temperature in PA1, 2 parameter
levels:
− Value range of the gradient: 0.2 to 1.0
− Value range of the maximum flow temperature: 5 to 50 °C
In addition, it is possible to activate the drying of jointless floors function. In connection with
this, the function block parameters are listed which appear after activating this function
block. They determine the drying process: the first heating up phase starts at the entered Start
temperature, which has a flow temperature of 25 °C in its default setting. The start tempera-
ture is constantly regulated for the days entered in 'Hold (days)'. Afterwards, this tempera-
ture is raised by the value entered in 'Temp. rise/day' within 24 hours, i.e. the default setting
causes the flow temperature set point to rise to 30 °C 24 hours after the holding phase. If the
maximum temperature is reached, it is kept constant for the number of days entered in 'Hold
(days)'. The 'Temp. reduction/day' parameter determines the temperature reduction down-
wards. If the 'Temp. reduction/day' is set to 0, the temperature maintaining phase moves di-
rectly to automatic mode.If the function block parameter 'Start temperature' is set to 25 °C
and 'Temp. rise/day' to 0.0 °C, the drying functions runs as specified in Part 4 of
DIN EN 1264: the drying of jointless floors function starts with a flow temperature of 25 °C,
which is kept constant for three days. Afterwards, the controller switches to the maximum ad-
justed temperature. The further process remains unchanged. The drying of jointless floors
function is activated using the adjusted 'Start temperature' by changing the setting 'Stop' to
'Start'. 'Start' is displayed when the drying function starts. The restarting stages 'Build-up',
'Hold' (holding the maximum temperature) and 'Reduction' can be be selected to continue an
interrupted drying process. The course of the drying process can be monitored in the operat-
ing level by reading the measured data of the associated heating circuit.