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CONNECTION TO POWER MAINS
The unit is rated for connection to 230 V/50 (60) Hz single-phase alternating current power mains via insulated, durable and thermal-
resistant cords (cables, wires) with respective cross section not less than 2.5 mm
applicable cable cross section must be selected depending on the wire type, its maximum temperature and insulation, the maximum
current, the wire length and its installation method. Connect the unit to power mains through the external automatic circuit breaker with
a magnetic trip integrated into the fixed wiring system with the rated current not below the rated current consumption.
The terminal block with the prewired control unit is located inside the control unit compartment.
To connect the power and the ground cable, route the cables through the airtight electric lead-in in the unit casing and connect these
to the terminal block.
The wiring diagram for connection of the air handling unit to power supply is on the back side of the lid.
C
NO
C
NO
C
NO
+24V
31
30
29
28
27
26
25
U**
U**
U**
U**
2 1
2 1
+24V B
CCU*
SM2*
SM1*
Designation
M3*
Circulation pump
SM3*
Three-way valve electric actuator
BP1*
Heating medium flow control sensor
DD1*
Heating medium pressure switch
РК1
*
Contact from fire alarm panel
Boost
*
On/Off contacts of the Boost mode
CO
External CO
*
2
Р1
External control panel
*
SМ1
Supply air damper actuator
*
SМ2
Exhaust air damper actuator
*
CCU
*
Cooler control
*Is not included in the delivery set.
**The supply voltage U of the SM1, SM2 external dampers is selected depending on the type of dampers.
*** Maximum connecting cable length is 20 m!
Output parameters: terminals 26-31 – 3 A, 30VDC/~ 250VAC ("dry contact").
12
DISCONNECT THE UNIT FROM POWER
SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER MAINS BY A QUALIFIED ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
EXTERNAL CONNECTIONS DIAGRAM OF A21
B
A Gnd +24V 0-10V Gnd C
24
23
22
21
20
19
A Gnd
+24V 0-10V Gnd
CО2*
Р1*
Name
sensor
2
MANUFACTURER'S LABEL.
AND WILL VOID THE WARRANTY.
NO
C
NC
C
NC
In Gnd 0-10V Gnd +24V N
18
17
16
15
14
13
12
2 1
2 1
2 1
2 1
Boost*
PK1*
DD1*
BP1*
Model
NC
NC
NC
NO
NO
NO
NO
— ELECTRIC SHOCK HAZARD!
2
. The cable cross-section is given for reference only. The
L
11
10
9
8
7
6
5
0-10V Gnd+24V
2 1
SM3*
M3*
Wire***
2 x 0,75 мм
2
3 x 0,75 мм
2
2 x 0,75 мм
2
2 x 0,75 мм
2
2 x 0,75 мм
2
2 x 0,75 мм
2
3 x 0,75 мм
2
4 x 0,25 мм
2
2 x 0,75 мм
2
2 x 0,75 мм
2
2 x 0,75 мм
2
VUT/VUE 550/900 PBW EC
4
3
2
1
L1
N
Note
remove the jumper
remove the jumper
3 A, 30VDC/~250 AC
3 A, 30VDC/~250 AC
3 A, 30VDC/~250 AC
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