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MIXER MAX
Maximum mixer flow temperature
Setting range 20 °C to 90 °C.
This setting limits the flow temperature of
the mixer circuit. For example, if a higher
set flow temperature is calculated from the
mixer circuit data, the max. set mixer flow
temperature is used by the controller, which
regulates to this value.
MIXER DYNAMIC
Mixer runtime
Setting range 60 to 240
This setting enables a matching of the mixer
to the control characteristics. Setting 60 to 240
means 6 K to 24 K control deviation.
The system scans every 10 s, and the
minimum ON time for the mixer is 0.5 s. The
mixer does not respond inside the dead zone
of ±1 K from the set value.
Example for the setting 100 = 10 K (see Fig.
below).
The control deviation (set mixer temperature
– actual mixer temperature) is 5 K. The mixer
opens for 5 s, then pauses for 5 s and starts
again.
The control deviation (set mixer temperature –
actual mixer temperature) is 7.5 K. The mixer
opens for 7.5 s, then pauses for 2.5 s and
starts again.
In other words, the smaller the control
deviation, the shorter the mixer ON time and
the longer its pauses.
A reduction of the MIXER DYNA TM value
with static control deviation increases the ON
duration and reduces pauses.
Einstellung 100 =
Regelabweichung 10 K
± 1 K
Regelabweichung (K)
Einschaltdauer (%)
Regelabweichung 5 K
Example for setting 100 and a current
control deviation of 5 K
5 K of 10 K = 50 % =
ON duration
C26_03_01_0097
setting 100 =
Control deviation 10 K
Control deviation 5 K
Control deviation K
ON duration (%)
FROST PROTECT
To prevent the heating system freezing up,
the heating circuit pumps are started at the
selected frost protection temperature; the
reverse hysteresis is 1 K.
PRESET REM CON
The FE 7 remote control can be selected for
both heating circuits
Using the SELECT REM CON parameter, you
can predetermine for which heating circuit
the remote control should be active. Under
the parameter ROOM T 1 OR 2 at control level
2, you can scan the actual room temperature,
subject to the remote control preselection.
FE CORRECTION
This parameter enables the calibration of the
actual room temperature.
resulting run-on time of the source pump
reduces accordingly. If the brine inlet
temperature drops, the run-on time increases.
From a brine inlet temperature of 10 °C,
the run-on time will always be at least one
minute.
MIN SRCE TEMP
Setting range –10 °C to +10 °C and setting
OFF.
Never operate the equipment
with source temperatures below
-9°C(triplephase) -5°C(singlephase)
With setting OFF, the source sensor
temperature will not be scanned.
The compressor shuts down and the idle time
is set, when the actual temperature drops
below the minimum source temperature. The
compressor is enabled again after the idle
time has expired and the fixed hysteresis of 2
K has been exceeded.
This fault, i.e. MIN SRCE TEMP, will be
indicated in the display by a flashing warning
triangle, and will be entered into the fault list.
The source pump will always be started 30
seconds earlier than the compressor, which
starts when there is a heat demand coming
from the central heating or DHW side.
The source pump runs on for 60 sec-
onds after the heat pump has been
switched OFF.
RTRN MAX
Maximum return temperature
Setting range 20 °C to 55 °C.
The heat pump will be switched OFF
immediately, when the temperature at the
return sensor reaches this value during
heating operation. This safety function
prevents the high pressure limiter from
responding. Reaching this value will
not trigger a fault message. The return
temperature is not scanned during DHW
operation.
MAX FLOW T HTG
Maximum heat pump flow temperature for
central heating
Setting range 20 °C to 65 °C.
This setting limits the heat pump flow
temperature and all secondary heat sources
during heating operation.
HP SENSOR
Maximum high pressure
Setting range 38 bar to 40 bar.This setting
limits the high pressure during DHW or central
heating. The system implements a controlled
shutdown when the maximum high pressure
is reached.See also WW ECO.
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