EXTERNAL WIRING DIAGRAM FOR THE UNITS WITH S14 AUTOMATION
11 10 9 8 7 6 5 4 3 2 1
+U Rx Tx
br
own
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gr
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e
Control
panel
GND C NO PK PK PE N
L
PE N
L
QF
+U Rx Tx GND C NO PK PK PE N
L
NO contac
t of the
ex
ter
nal contr
ol unit
(RH/C
O
2
/V
OC sensor)
PK
: fir
e alar
m panel
min. cur
rent 1 A (r
emo
ve
the jumper dur
ing connec
tion)
Connection of the fire alarm panel (PK) contact
While connecting the fire alarm panel contact remove the jumper between the terminals 4 and 5. In this case, the connection relies on
a normally closed dry contact. In case of fire, the normally closed dry contact opens the control circuit from the central fire alarm panel
and cuts off power supply to the unit.
Connecting of the external control unit contact, such as RH/CO
2
/VOC sensor (NO, C).
Connect the CO
2
sensor to the terminals 6 and 7. In this case, connection relies on a normally open dry contact. Once the contact is
closed, the unit starts to run with the maximum speed.
The cable for connection of the control panel to the air handling unit must be of 4x0.25 mm
2
type and have the maximum length 10 m.
EXTERNAL WIRING DIAGRAM FOR THE UNITS WITH S21 AUTOMATION
L1 N N PE PE 1 2 C NC C NO GND A B
+24V
C NO
1 2 1 2 3 4 5 6 7 8 9 10
X1
X2
1
2
PK1*
1
2
1
2
1
2
Boost*
GND
A
B
+24V
P1*
C
C
U
*
L1 N N
Power input
230 VAC
brown
yello
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Designation
Name
Type
Wire
Note
PK1*
Contact from a fire alarm panel
NC
2 x 0.75 mm
2
CCU*
Cooler control
NO
2 x 0.75 mm
2
3 A, 30 V DC/~250 AC
P1*
External control panel
4 x 0.25 mm
2
Boost*
Boost mode contacts On/Off
NO
2 x 0.75 mm
2
*Not included in the delivery set.
Output parameters: terminals 9-10 – 3 A, 30 V DC/~250 V AC (dry contact).
— ELECTRIC SHOCK HAZARD!
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15
