18
CONNECTION TO POWER MAINS
CONNECTION OF THE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED
ELECTRICIAN WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER
CAREFUL READING OF THE PRESENT USER’S MANUAL. THE RATED ELECTRICAL
PARAMETERS OF THE UNIT ARE SHOWN ON THE RATING PLATE. ANY INTERNAL
CONNECTION MODIFICATIONS ARE NOT ALLOWED AND RESULT IN WARRANTY
LOSS.
The unit is rated for connection to 230 V/50 Hz single-phase alternating current power mains (Fig. 17, 18) via insulated, durable and
heat resistant conductors (cables, wires) with respective cross section, in any case no less than 2.5 mm
2
.
The above cross section is for reference only. The 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.
Use copper wires only.
The unit must be grounded.
Connect the unit to power mains through the terminal block which is located in the control unit on the top of the unit, in compliance
with the wiring diagram and the terminal marking. Connect all the control and supply cables in compliance with the terminal marking
and polarity!
Connect the unit to power mains through the external automatic switch with thermal-magnetic circuit breaker integrated into the
fixed wiring system. The trip current should be not lower than the current consumption (ref. Table 2).
Fig. 17. External wiring diagram for VUT 800 (1000) WH
L
L
1
L
2
N
3
PE
4
PE
5
N
6
L
7
1
8
2
9
c
10
no
11
nc
12
c
13
no
14
1
15
2
16
3
17
6
18
5
19
1
20
9
21
2
22
3
23
4
24
7
25
1
26
2
27
1
28
2
29
1
30
1
31
2
32
1
33
3
34
2
35
1
N
N
PE
PE
Power 230
V
AC
2
1
t°C
TE1
2
1
t°C
TE2
2
1
t°C
TE3
2
1
t°C
TE4
2
1
t°C
TE5
1
2
PK1*
1
2
DD1*
ALP
9
1
5
6
7 8
4
3
2
P1*
— ELECTRIC SHOCK HAZARD!
PE N L
M2*
U1U2
PE Z
M2
U1U2
PE Z
M1
N
L
1 2
SM1
-
+
1 2
Y
U
3 5
SM4*
L
L1
1 2
N
3
SM3
N
2x1 mm
Cooler activation signal
(no-contact)
L
1 2
SM2
X1
Fig. 18. External wiring diagram for VUT 1500 (2000) WH
L
L
4
L
5
N
6
PE
1
L
2
N
3
PE
7
PE
8
N
9
L
10
1
11
2
12
c
13
no
14
nc
15
c
16
no
17
1
18
2
19
3
20
6
21
5
22
1
23
9
24
2
25
3
26
4
27
7
28
1
29
2
30
1
31
2
32
1
33
1
34
2
35
1
36
3
37
2
38
1
N
N
PE
PE
Power 230
V
AC
2
1
t°C
TE1
2
1
t°C
TE2
2
1
t°C
TE3
2
1
t°C
TE4
2
1
t°C
TE5
1
2
PK1*
1
2
DD1*
ALP
9
1
5
6
7 8
4
3
2
P1*
— ELECTRIC SHOCK HAZARD!
PE N L
M2*
U1U2
PE Z
M2
U1U2
PE Z
M1
N
L
1 2
SM1
-
+
1 2
Y
U
3 5
SM4*
L
L1
1 2
N
3
SM3
N
2x1 mm
Cooler activation signal
(no-contact)
L
1 2
SM2
X1
ATTENTION! MOUNTING AND CONNECTING OF THE AUTOMATIC CONTROL SYSTEM
IS ALLOWED BY A QUALIFIED ELECTRICIAN WITH A WORK PERMIT FOR THIS TYPE OF
OPERATIONS. DISCONNECT THE UNIT FROM POWER MAINS BEFORE ANY SERVICING
OR MAINTENANCE OPERATIONS.
