14
FE Correction
This parameter enables the calibration of the
actual room temperature.
Room influence for FEK
Standard setting 5; adjustable from ----via
“0 to 20” dashes (----) in the display:
When the FEK control module is connected,
the room temperature sensor
only serves
to capture and display the actual room
temperature; it has no influence on the actual
control. With any setting, you can adjust the
set room temperature for the heating circuit at
the FEK control module by ±5 K. This set value
adjustment applies for the then current heating
time,
not
for the setback time.
At the same time, setting “0 to 20” serves to
control the room temperature-dependent night
setback. This means, the heating circuit pump
is switched OFF at the point of changeover
from the heating into the setback phase. It
remains OFF, until the actual room temperature
first drops below the set room temperature.
Afterwards the system regulates in weather-
compensated mode.
If you want the room temperature to be taken
into account, set the room temperature sensor
influence to
>
0. The room sensor influence
has the same effect as the outside temperature
sensor has on the return temperature. Only
this effect is 1 to 20 times greater than the set
factor.
Room temperature-dependent return
temperature with weather compensation
With this type of control, a control cascade is
formed from weather-compensated and room
temperature-dependent return temperature
control. In other words, the weather-
compensated return temperature control
pre-selects the return temperature, which is
corrected by the overlaid return temperature
control in accordance with the following
formula:
∆ϑ
R
= (
ϑ
Rset
− ϑ
Ractual
) * S * K
Because a substantial proportion of control
is already taken care of by the weather-
compensated control, the room temperature
sensor influence
K
can be set lower than with a
purely room temperature control (
K
= 20). The
figure on page 15 indicates the control method
with the set factor
K
= 10 (room influence)
and a heating curve
S
= 1.2.
Room temperature control with weather-
compensation
This type of control offers two substantial
benefits:
Incorrectly set heating curves are corrected
by the room temperature sensor influence
K
, whilst the smaller factor
K
provides more
stable control.
However, observe the following for all control
units with room temperature sensor influence:
– The room temperature sensor must capture
the room temperature accurately.
– Open doors and windows severely
influence the control result.
– All radiator valves in the lead room must
always be fully open.
– The temperature inside the lead room is
decisive for the entire heating circuit.
Set the room temperature sensor influence to
> 0, if you want the room temperature to be
taken into account.
LCD test
Pressing
once initiates a LCD test. All
display elements are displayed in sequence.
FEK software
Display of the current software issue.
