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7.3 Connection options
3-speed fan control
With 3-speed control of the fan, it is possible to
control 3 fan stages (Low
, Medium, High) plus
automatic operation. For this purpose, 230V must
be laid to the required fan speed.
2
5
1
6 7
43
Low
Medium
High
Auto
L
N
9
12
8
13 14
1110
COM
K1
K2
H
M
L
AUTO
ALARM
ALARM
0-10V
ON/OFF
GND
A
B
Unit control via 0-10V signal
The EC fan installed in the unit enables stepless
speed adjustment with 0-10V DC signal (optionally
0-5V if the CN9 jumper is removed). If the voltage
drops below 2V DC, the unit will switch to stand-by
operation automatically
. If the 0-10V signal is con-
nected, the polarity must be checked. The 0-10V
signal can also be connected to multiple units in
parallel, in order to realise group control.
+
-
0...10VDC
2
5
1
6 7
43 9
12
8
13 14
1110
COM
K1
K2
H
M
L
AUTO
ALARM
ALARM
0-10V
ON/OFF
GND
A
B
Enable/block via external start/stop contact
Using a potential-free start/stop contact, the unit
can be enabled or blocked from an external loca-
tion. If this contact is closed, the unit is blocked
and is placed in standby operation. An external
block is indicated via a corresponding flashing
code by the LEDs (see chapter “Malfunction indi-
cated by flashing code”). It is not possible to invert
this logic.
2
5
1
6 7
43 9
12
8
13 14
1110
COM
K1
K2
H
M
L
AUTO
ALARM
ALARM
0-10V
ON/OFF
GND
A
B
External cooling/heating contact
If the cooling or heating operating mode is speci-
fied via external regulation, this can take place by
switching in the respective 230V contact. As long
as voltage is supplied to these contacts, switching
the operating mode is not possible via a further
regulation instance (for example infrared remote
control).
2
5
1
6 7
43 9
12
8
13 14
1110
COM
K1
K2
H
M
L
AUTO
ALARM
ALARM
0-10V
ON/OFF
GND
A
B
Kühlen
Heizen
L
N
39
39


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