31
brown
CN3
blue
F Hv
1
2
6
1
CN2
brown
blue
2
1
3
5
4
GAS VALVE
12
4
3
OPE
OPE
pink
blue
P
brown
N
L
Fuse 3.15A F
230 V
M3
F
blue
blue
brown
brown
brown
blue
7
1
CN9
W.P.S.
2
3
1
white
white
TSC2
blue
Spark
electrode
brown
yellow/green
N
F
CN1
3
1
2
red (+)
blue (HS)
pink (PWM)
grey (-)
CN10
F Lv
1
4
1
12
CN11
white
white
F.T.
-t°
-t°
R.S.
red
red
-t°
F.S.
grey
grey
black
F.O.HT.
blue
blue
white
CN8
CN7
1
12
CN11
1
4
CN10
1
7
CN9
CN6
CN5
CN12
1
CN4
1
3
CN3
1
2
CN2
1
6
AKL
CN1
1
FA1
FA2
arancione
E.R.
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
CN15
P3
P2
P1
CN13
CN14
SW1
P4
F1
3.15A T
CN1
CN2
NO
NC
C
black
black
BE11
FUNCTIONAL DIAGRAM
Fig. 45
S.W
.
CO2 function button
F
.S. (1)
Flame sensor
F1
Fuse 3.15A
T
F
External fuse 3.15A
F
M3
T
erminal strip for electrical connection hight
power
P
Pump
OPE
Gas valve solenoids
F Hv
Fan power supply 230 V
F Lv
Fan signal control
WPS
W
ater pressure switch
S.E. Spark
electrode
TSC2 Ignition
transformer
F
.O.H.T
Flow over heat thermostat
FS Flue
sensor
FT
Flow thermistor (NTC)
RS
Return thermistor (NTC)
AKL
Main PCB with vis medium integrated
BE1
1
On board relè PCB
P1
Selector switch and heating potentiometer
P2 Unused
P3 Unused
P4 Unused
JP1 Unused
JP2 Unused
JP3 Unused
JP4 Unused
JP5
Selection operating only heating
JP6 Unused
JP7 Unused
JP8
Closed - Unused
CN1-CN15 Connectors - (CN4 Unused – CN5 room thermostat (24 Vdc)
Summary of Contents for Mynute i20
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