5.3
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 parameter lev-
els PA1, 2:
4
Value range of the gradient: 0.2 to 1.0
4
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 always starts with a flow
temperature of 25 °C. In the course of 24 hours, this temperature is raised by the value en-
tered in
Temperature rise, i.e. the default setting causes the temperature to rise to 30 °C
within the first 24 hours. If the
Maximum temperature is reached, it is kept constant for the
number of days entered in
Maintaining time for maximum temperature. The Temperature re-
duction determines the temperature reduction downwards. If the Temperature reduction is set
to 0, the temperature maintaining phase moves directly to automatic mode.
The drying function is activated by changing the setting
STOP to START after Temperature re-
duction. The course of the drying process can be monitored in the information level over the
icon of flow temperature display (
) of the associated heating circuit:
Temperature build-up phase
Temperature maintaining phase
Temperature reducing phase
The drying process has been successfully completed when the additional icon in the flow
temperature display goes out after the last phase.
STOP on the display indicates that there has been a deviation of flow temperature of more
than 5 °C for longer than 30 minutes. The function is cancelled by the controller in such
cases. While
STOP appears on the display, the controller keeps the flow temperature con-
stant at 25 °C.
A power failure while the drying function is active or when
STOP appears on the display au-
tomatically leads to the drying function restarting.
In systems in which the drying function had to be interrupted due to DHW heating (e.g.
Anl 2.1, 4.1), storage tank charging does not occur while the drying function is active, pro-
vided it is not used for frost protection of the storage tank.
EB 5576 EN
53
Functions of the heating circuit
START
START
START
