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CONNECTION TO POWER MAINS AND UNIT CONTROL
The air-handling unit is rated for connection to single-phase AC 230 V/50 (60) Hz mains. The unit has a power cord with a plug to connect
to a standard grounded outlet. The power cord is pre-wired to the terminal block.
The external power input must be equipped with an automatic circuit breaker built into the stationary wiring to open the circuit in the
event of overload or short-circuit. The circuit breaker trip current is selected based on data of the “Technical data” section.
The position of the circuit breaker must ensure free access for quick unit power-off.
CONNECTION OF ADDITIONAL EXTERNAL CONTROLS TO THE VUT 160/250/350 PB EC L/R A11 UNITS
The unit has an option of connection of additional external controls
• DX cooler
• Electric actuator of outer supply and exhaust air dampers
• Fire alarm panel
The unit controls must be connected to the X1 terminal block, which is located in the control unit. The cables are connected to the
control unit via the electric lead-ins.
If intake air cooling is needed, the DX cooler operating signal closes the contacts 8 and 9 to allow operating of the cooler and opens them
to block the operation. The permissible current via the power contacts must not exceed 2 A, 230 V.
When connecting the supply and/or exhaust air dampers to the contacts 4 and 5 of the external connection terminals, electric voltage
230 V/50 (60) Hz is supplied to the above terminals when the air dampers must be opened and is cut off when the air dampers must be
closed. The automatic fire extinguishing system contact is connected to the contacts 6 and 7 (X1 terminal). The contact must be normally
open. If the fire alarm signal turns on, the contact closes that results in equipment shutdown.
External control units wiring diagram
ССU
(no-contact)
Power input 230 VAC
Х1
Electric shock hazard!
1
L
2
N
3
PE
4
L
5
N
6
c
7
no
8
c
9
no
10
+12V
11
GND
12
B
13
A
14
+5V
15
GND
16
Vo
SM1*
1
2
N
L
SM2*
1
2
N
L
PK1*
2
1
P1
Gnd
A
B
+12V
t °C
TE1
Gnd Vo
+5V
Whit
e
Gr
een
Br
own
Yello
w
Designation
Name
Model
Wire**
CCU*
DX cooler
N0
2x0.75 mm
2
SМ1*
Supply air damper actuator
LF 230
2x0.75 mm
2
SМ2*
Extract air damper actuator
LF 230
2x0.75 mm
2
РК1*
Contact from a fire alarm panel
N0
2x0.75 mm
2
Р1
Control panel
ТЕ1
Outdoor temperature sensor
The sensor is installed by the manufacturer in the intake air duct.
*Is not included in the delivery set
** Maximum connecting cable length is 20 m!
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
