Unical DUA plus - Electrical Wiring and Configuration; Electrical Wiring Diagram

20
Installation info
KEY
A1...A8 = Connectors
ROD = Connector of the ionisation on
the ignition PCB
Y1 = Connector TA - Outer sensor
Y2 = Connector for supply 230 V-50
Hz
DK = Pressure switch against lack of
water
E. RIV. = Ionisation probe
E. ACC.1= Ignition electrode 1
E. ACC.2= Ignition electrode 2
FL = DHW flow switch
MD = Modulating coil
MVD = Three way valve actuator
(only for E version)
P = Circulating pump
PV = Fan pressure switch
(only for TFS version)
SE = Outer sensor (option)
SR = Heating temperature sensor
SS = D.H.W. temperature sensor
TA 1 = Modulanting digital programmer
(option)
TA 2 = Room thermostat (option)
TF = Smoke antispillage thermostat
TL = Safety thermostat
V = Fan (only for TFS version)
VG = Gas valve
fig. 21
DISPLAY PCB
A8
65 43 2 1
65432 1
YEL /GREEN
BLUE
GREEN
WHITE
RED
BROWN
P
DH W
CH
MVD
YEL/GREEN
BLUE
BROWN
PR
3
E. RIV.
WHITE
ROD
A6
V2V1
VG
hone
y
well
BROWN
BROWN
BLUE
BLUE
SICUREZZA
MODULAZIONE
RED
E. ACC. 1
YEL/GREEN
ALIMENTAZ. TRASFORMATORE ACCENSIONE
A9
BROWN
V
BLUE
YEL/GREEN
65 43 2 1
7
32 1
SR
GREEN
BROWN
WHITE
BLUE
8765 4321
A3
4321
A1
7654321
5432 1
A4
A2
SOLO VER. C
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
BLUE
BLUE
BLUE
BROWN
BROWN
RED
RED
GREEN
VERSIONE
TN
VERSIONE
TFS
54321
DK
SS FL TF
TL
PV TL
MD
RED
E. ACC. 2
65 432 1
GREE
WHITE
RED
BROWN
BLUE
YEL/GREEN
PR
RED
WHITE
GREEN
DHW
CH
6
3 2
MVD
(HONEYWELL)
MVD
BROWN
SE
TA 1
BLACK
BLUE YEL/GREEN
L1
N
L1
N
ALIMENTATION
230 V - 50 Hz
IG
54321
GND1
GND2
GND4
ROD
N
Y2
GND5
L1
EXT
SENSOR
Y1
A8
765432143217654
8
321
2 1
21
A6
A9
A3 A1 A2 A4
TA 2 EVZ
2.3 - ELECTRICAL WIRING
2.3.1 - ACTUAL CONNECTION DIAGRAM