17
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
CR
= Modulanting digital programmer
(option)
CV
= Volumetric counter
DK
= Pressureswitch against lack of
water
E. RIV.
= Ionisation probe
fig. 10
2.3 - ELECTRICAL WIRING
2.3.1 - ACTUAL CONNECTION DIAGRAM FOR DUA PLUS
30
m
m
m
m
m
tank
E. ACC.1 = Ignition electrode
E. ACC.2 =
Ignition electrode
FL
= DHW flow switch
IG
= Main switch
MD
= Modulatin
g coil
MVD
= Three way valve actuator
P
= Circulating pump
PV
= Fan pressureswitch
SBM
= Micro-accumulation temperature
sensor
SE
= Outer sensor
SR
= Heating temperature sensor
SS
= D.H.W. temperature sensor
TA
= Room thermostat (option)
TL
= Safety thermostat
V
= Fan
VG
= Gas valve
NA
NC
COM
DK
BRO
W
N
WH
IT
E
L1
N
54
32
1
GND1
GND2
GND
4
R O
D
N
Y2
GND5
L1
EX
T
SE
N
S
O
R
Y1
PV
BL
UE
TL
BL
U
E
BR
O
W
N
BL
A
N
C
SBM
RE
D
RE
D
76
54
32
1
CV
BR
O
W
N
43
21
VG
GR
E
E
N
GR
E
E
N
MD
BR
O
W
N
BL
U
E
E. ACC. 1
TEFLON RED
TEFLON RED
E. ACC. 2
N
L
BL
U
E
BR
O
W
N
MVD
E. RIV.
TEFLON
BLANC
SR
76
54
8
32
1
V
BROWN
BLUE
WH
IT
E
WH
IT
E
2
1
2
1
P
YEL/GREEN
BL
U
E
BRO
W
N
1
2
GREEN
RED (DHW)
BLANC (CH)
SE
optional
BR
O
W
N
WH
IT
E
CR
optional
TA (
ON/OFF)
optional
SIM-CRONO
REGOLAFACILE
BROWN
BLUE
L1
N
NA T
GPL
OFF
ZONE
VALVE
(Optional)
(Limit s
)
Zone valve
witch
SS
RE
D
RE
D
1
2
3
RE
D
BL
A
N
C
230 V
50 Hz