81
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
3.5 WIRING DIAGRAM
1
2
3
4
5
6
7
8
10
9
52
Key (Fig. 52):
A19
- Removable memory
B1
- Flow probe
B2
- D.H.W. probe
B4
- External probe (optional)
B5
- Return probe
B24
- Safety flow probe
B27
- Double flue probe sensor
E3
- Ignition and detection electrode
M1
- Boiler circulating pump
M20 - Fan
M30 - Three-way stepper motor
S20
- Room thermostat (optional)
S5
- System pressure switch
T1
- Boiler P.C.B. transformer
T2
- Ignition transformer
X40
- Room thermostat jumper
X70 - Safety thermostat (low tempera-
ture) jumper
Y1
- Gas valve
Colour code key (Fig. 52):
BK - Black
BL
- Blue
BR
- Brown
G
- Green
GY - Grey
OR - Orange
P
- Purple
PK - Pink
R
- Red
W
- White
Y
- Yellow
Any room thermostat or ON-OFF must be
connected to terminals 40 and 41 elimi-
nating jumper X40.
Any CAR
V2
must be connected to termi-
nals 44 and 41 complying with the polarity
without eliminating jumper X40
.
Key (Fig. 52):
1
- 230 Vac 50Hz Power supply
2
- Wireless room probes (optional)
3
- Wireless concentrator (optional)
4
- Dominus (optional)
5
- (CAR
V2
) (optional)
6
- Configurable contact or System
flow probe
7
- 230 V connections
8
- Low voltage connections
9
- Display board
10
- Capacitive keyboard