Einstellung 100 =
Regelabweichung 10 K
± 1 K
Regelabweichung (K)
Einschaltdauer (%)
Regelabweichung 5 K
Example for setting 100 and a current control de-
viation of 5K. 5K of 10K = 50 % = ON duration
26_03_01_0097
and the mixer closes: This only applies if the
room sensor influence is set to K > 0. Reverse
control is subject to the following condition:
ϑ Room ACTUAL <ϑ Room SET
Summer operation as described in parameter
8 also becomes effective for the respective
heating circuit when operating with a FE7 re-
mote control.
10
Pump constant run
Buffer loading pump – constant run
This setting is hidden for HP type 2 with con-
nected source sensor (WPF).
Position OFF applies to systems with buffer
cylinder. The buffer cylinder loading pumps
start with the respective heat pumps. Systems
without buffer cylinder require that the hea-
ting system return temperature is constantly
monitored by WPM II, i.e. the loading pumps
run constantly. They are switched OFF during
DHW priority operation.
For this, system logic becomes active, which
means that the buffer loading pumps are swit-
ched OFF together with the respective heat
pumps.
When operating with the buffer loading pump
in constant operation and fixed value, summer
logic will not become active. This means that
the buffer loading pump continues to run
even in summer operation.
11
Fixed value
Fixed value temperature
The heat pump return is regulated to a set
fixed temperature. The switching time pro-
gram will then not be accepted. The various
program switch positions will then only affect
the mixer circuit (if installed). Frost protection
is activates in the program selector positions
„Standby“ and „DHW“, if a fixed temperature
has been selected, and the compressors are
switched OFF.
Summer logic remains inactive with fixed tem-
perature control. This means, that the heating
circuit pump is not switched OFF for the di-
rect heating circuit.
With the flap shut, the display shows the fixed
temperature program, in other words always
heating times.
12
Source
Frost protection for brine/water and water/
water heat pumps. The three adjustable opti-
ons determine, which heat transfer medium is
used as brine in the heat pump system.
For air/water heat pumps (WPL),
select ethylene glycol.
Water as brine means, that the heat pump
frost protection is active. For the WPF, the
frost protection pressure limiter or for the
WPWE, the frost protection sensor will be
active. This means that the HP is switched
OFF as soon as one of these has responded.
The idle time is then set and „Other fault“ is
displayed with a flashing warning triangle. The
fault is also entered into the error list.
Ethylene glycol as brine (including polypropy-
lene glycol) means that the heat pump frost
protection is inactive. Responses by the frost
protection pressure limiter in the WPF and
the frost protection sensor in the WPWE no
longer have any influence.
Potassium carbonate as brine means, that
the heat pump frost protection is inactive.
This only safeguards, that the source pump
is started at an outside temperature of –10
°C, even if the heat pump is idle. It is swit-
ched OFF again at an outside temperature of
– 8°C.
13
Min source temp.
Setting range –10 °C to +10 °C and OFF
position.
In the OFF setting, scanning excludes the sour-
ce sensor temperature.
When the actual temperature falls below the
minimum source temperature, all compressors
are shut down, and the idle times are set. The
compressors are enabled again after the idle
times have expired and the fixed hysteresis of
2 K has been exceeded.
This fault, i.e. Min srce temp, will be shown in
the display with a flashing warning triangle, and
will be entered into the error 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
seconds after the heat pump has
been switched OFF.
14
RTRN MAX
Maximum return temperature
Setting range 20 °C to 55 °C.
All heat pumps are switched OFF immediately,
when the temperature at the return sensor
reaches this value during heating operation.
This safety function prevents the high pressure
limiter responding. Reaching this value will not
trigger a fault message.
The return temperature is not scanned during
DHW operation.
15
MAX HTG FLOW T
Maximum heat pump ow temperature for
central heating
Setting range 20 °C to 65 °C.
This setting limits the heat pump flow tempe-
rature and all secondary heat sources in hea-
ting operation. This limiter shutdown applies
to all heat pump types.
16
MAX DHW FLOW T
Maximum HP ow temperature for DHW
Setting range 20 °C to 65 °C.
This setting limits the heat pump flow tempe-
rature during DHW loading/heating. This limit-
er shutdown applies to all heat pump types.
See also parameter 33 DHW learn.
17
MIXER MAX
Maximum mixer ow 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 cir-
Setting 100 =
control deviation 10 K
control deviation 5 K
control deviation (K)
ON duration
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