25
Externa 30 O
Cod. 3540T540 - 04/2009 (Rev. 00)
4.6 Wiring diagram
fig. 12
Key
16
Fan
32
Central heating pump
34
Central heating temperature sensor
43
Air pressure switch
44
Gas
valve
49
Safety
thermostat
50
Limit
thermostat
X6
X1
X2
X3
X4
1
21
21
3
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
12
13
2
1
X5
TEST
X12
1
2
1
2
3
4
5
6
7
8
9
X10
W
O
V
R
X8
X7
81
82
PMF03F
JP02 JP01
JP03
Nat/LPG
X1
1
240V
24V
240V
24V
BR
Blue
BR
Blue
BR
Blue
MV1
MV2
MV3
MV4
Blue
BR
Blue
BR
BR
Blue
R
R
O
O
Blue
BR
BL
BL
BL
Y/G
Y/G
BL
X9
1
2
3
Blue
BR
W
W
101
L
N
21
72
98
50
11
4
34
32
44
49
16
43
175
72
Room thermostat (Optional)
81
Ignition
electrode
82
Detection
electrode
98
Switch
101
Electronic
board
114
Water pressure switch
175
Transformer