13
Externa 30 O
Cod. 3540T540 - 04/2009 (Rev. 00)
Adjustments on the electronic board
Follow the indications shown in the figure to access the electronic board.
Potentiometer adjustment
P1
Central heating temperature adjustment
P2
Domestic hot water temperature control
P3
Heating output adjustment
P4
Gas pressure adjustment for ignition
P5
Factory set; do not tamper
X6
X1
X2
X3
X4
1
2
1
2
1
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
L1
L2
L3
L4
L5
+
-
+
-
Transformer
P2
DHW
X12
1
2
+
-
P3
+
-
P5
+
-
P4
JP02
JP01
JP03
1
2
3
4
5
6
7
8
9
X10
Nat/LPG
P1
CH
X11
RY100
RY101
PC PNO
L
N
HL
HL MV1 MV2 MV3 MV4
FAN
L
N
X8
X7
RY1
RY2
PMF03F
JP01
inserted
Set when optional 3 way valve for DHW (CH
pump runs during DHW mode)
JP01
not inserted
(Factory default) boiler only for CH
JP02:
Jumper inserted for natural gas opera-
tion
Jumper inserted for LPG operation
Jumper adjustment
1
2
3
