38
ROOM INFLUENCE
Room influence for the FE 7 remote control unit
Standard setting 5 adjustable from ----via
0 to 20
Dashes (----) in the display:
With the FE 7 remote control connected, the
room temperature sensor only serves to record
and display the actual room temperature; it
has no influence on the actual control. Only in
automatic mode can the room temperature for
heating circuit 1 or 2 be adjusted by ± 5 °C.
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 falls 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 !. 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 by 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:
'-
R
= (-
Rset
-
Ractual
) * S * K
Because a substantial proportion of control
is already taken care of by the weather-
compensated control unit, the room
temperature sensor influence K can be set
lower than with a purely room temperature
control (K=20). The figure below 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.
HTG LIMIT
Operational heat pump limit
The heat pump is switched OFF if the outside
temperature drops below the selected lower
limit for heating. Only the backup heater
provides central heating.
DUAL-MODE HTG
Dual-mode temperature of the heat pump for
heating operation
Below this outside temperature, the backup
heating is added for central heating, subject
to load.
DHW LIMIT
Operational heat pump limit
The heat pump is switched OFF at outside
temperatures below the selected lower DHW
limit.
Only the backup heating system provides DHW
heating.
DUAL-MODE DHW
Dual-mode temperature of the heat pump for
DHW operation
Below this outside temperature, the backup
heating is added for DHW heating, subject to
load.
DHW ECO
DHW learning function
Setting OFF
When heating DHW, the system automatically
adjusts itself to the required DHW temperature
(self-learning function).
The backup heating system will be added as
booster stage as soon as the heat pump is
shut down in DHW mode via the HP sensor or
via the hot gas temperature limit
(130 °C). The DHW heating will be terminated,
and the set DHW temperature is overwritten
with the actual DHW temperature, if the
flow temperature of 70 °C is achieved in this
operating mode.
20
30
40
20
50
60
70
80
90
Vorlauftemperatur [°C]
15 16 1917 18 21 22 23 24 25
Raumtemperatur [°C]
0
10
20
30
40
0
50
60
70
80
90
Vorlauftemperatur [°C]
20
-20
Außentemperatur [°C]
0
10
15
10
5
-5
-10
-15
Heizkurve
S = 1,2
witterungsabhängiger Vorlaufsollwert bei J
A
= -10°C
witterungsabhängiger Vorlaufsollwert bei J
A
= 0°C
witterungsabhängiger Vorlaufsollwert bei J
A
= 10°C
Raumfühlereinfluss bei K = 10 und S = 1,2
und Regelabweichung +/- 2 K
Parameter 22, Room influence
26_03_01_0098
22
23
24
25
26
27
Roomtemperature [ C]
Weather compensated set flow temp.at -
A
= - 10 °C
Weather compensated set flow temp.at -
A
= 10 °C
Weather compensated set flow temp.at -
A
= 0 °C
Room temp. sensor infl. at K = 10 and S = 1.2
and control deviation +/- 2 K
Flowtemperature [ C]
Heating cure
S = 1.2
Flowtemperature [ C]
Outside temperature [ °C]
'-
R
= (-
Rset
-
Ractual
) * S * K
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