52
ENG
“heaterSteam” +0300075EN - rel. 1.2 - 29.09.2015
11.8 Wiring diagram UR020-UR027 three-phase (400 V)
1G
2G
1H
2H
3H
1I
2I
3I
4I
5I
6I
7I
8I
4
J
3
J
2
J
1
J
4
3
2
1
8
7
6
5
3
2
1
6
5
4
3
2
1
6
5
4
2
1
4
3
D
C
B
A
I
J
E
MAIN BOARD
RELAY 1
H
G
CONTROL
MODULE
SERIAL
LINE
EXTERNAL
SIGNALS
ALARM
RELAY
1
E
2
E
3
E
4
E
5
E
6
E
1K
2K
3K
REMOTE
ON-OFF
K
POWER
SUPPLY
*
RSS2
+
RSS1
+
L1 L2 L3
PE
TB
F1
F2
K
1 2 3
S1
2
3
1
C
F3
MS
F4
TR
K
BRIDGING CONNECTION
4D
1D
3D
3C
1C
4C
5B
4B
6B
1B
3B
4A
7A
3A
6D
2B
5A
FA N
TO DP
QC1
CS
M1 M2 S1 S2 T1 T2
THP
DP
FV
NTC
LLC
LS
ABCDE F
R1
PTC1
R2
PTC2
R3
PTC3
QC1
ST
S2
TO WIRE DP
CONNECTION
A
B
CD
F
E
2
3
1
Fig. 11.h
* To be carried out by the installer
THP Motor Protector
QC1 Fast coupling
K CONTACTOR
LLC Level gauge
ST Sensor terminal block
F1 - F2 Primary circuit fuses
F3 Drain pump safety fuse
F4 Secondary circuit fuse
FV Feed valve
PTC1…3
Temperature sensor
heater 1…3
TR Transformer
DP Drain pump
LS High level electrodes
CS
Conductivity meter elec-
trodes
MS Manual switch
R1…3 Electric heater 1…3
SSR1…3 Solid state relay 1…3
FAN Fan
NTC Water temperature sensor
S1 SSR thermal switch
S2 Heater thermal switch
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