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3.2.4 Optional humidity sensor
24 V
pump
1
L2
L1'
L2'
TB
N
L
N
L TB
2
H%
24 V~/=
1
Humidity sensors (to be provided by the customer) serve for dewing protection in the cooling
mode.
3.2.5 Pilot function for change-
over heating/cooling
230 V
pump
1
N
L
N
L TB
pump
boiler
ECO
1
2
1
2
1
N
L
N
L TB
N L
L
N
N L
If no external change-over signal is available,
the internal pilot function of the base station
can be used for switching the overall installa-
tion between the operating modes Heating and
Cooling. A relay used by the base station for
switching over is used for this.
pump
boiler
ECO
boiler
ECO
CO
H %
1
2
1
2
1
2
2
1
2
1
2
1
2
1
0...10 V
5
4
6
3
boiler
ECO
CO
H %
2
1
2
1
2
1
2
1
2
L1 L2
L1'
L2'
TB
CO
H %
L
2
1
2
1
2
1
N
L1 L2
Heating
Cooling
230 V
CO
H %
Room BUS
System BUS
Room BUS
System BUS
1
2
1
2
2
A
B
A
B
24V A
A
B
A
B
24V A
B GND
rmBUS
rmBUS
3.2.6 External timer
24 V
HZ 1
HZ 2
HZ 3
pump
boiler
ECO
CO
H %
1
2
1
2
1
1
2
1
2
1
2
1
2
1
2
1
2
2
1
HZ 1
HZ 2
HZ 3
HZ 4
2
1
2
1
2
1
2
1
2
1
2
L
N
Heizen
N
L
Kühlen
The base station is equipped with an ECO input
for connecting an external timer, if the internal
clock of the room control unit Radio Display
shall not be used. When the input is activated
by the timer, the heating zones are switched to
night operation.
HZ 1
HZ 2
HZ 1
HZ 2
HZ 3
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
B GND
2
H%
24 V~/=
1
HZ 4
HZ 5
HZ 1
HZ 2
2
1
2
1
2
1
1
2
2
1
1
2
2
1
1
pump
boiler
1
2
1
2
1
HZ 5
N
L
N
HZ 6
L TB
HZ 7
HZ 8
1
2
1
2
1
2
1
2
1
2
1
2
HZ 3
HZ 4
HZ 4
1
2
1
2
1
2
2
1
2
1
0...10 V
5
4
6
3
DEU
ENG
FRA
NDL
230 V
HZ 6
HZ 7
HZ 8
HZ 9
HZ 3
HZ 4
HZ 5
2
2
1
1
2
2
1
1
2
2
1
2
1
2
1
1
2
ECO
CO
H %
ESP
2
1
2
1
2
HZ 9
HZ 10
HZ 11 HZ 12
1
2
1
2
1
2
1
2
1
2
1
2
35
HZ 5
2
1
HZ
ITA
2
1
1
2
2
1
1
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