46
FUNCTIONAL DIAGRAM
AKL07N1 G
AR
Main
PCB
SC0X
Digital display
P1
Reset selection potentiometer
P3
CO2 function fan speed regulation
CN1-CN17
Connectors
S.W
.1
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
3W
3 way motor
S.E.
Spark electrode
TSC2
Ignition transformer
D.H.W
.F
.S
Domestic hot water flow switch
D.H.W
.T
Domestic hot water temperature
P.T
.
Pressure transducer
F.O.H.T
Flow over heat thermostat
F.S.
Flue sensor
F.T
.
Flow thermistor (NTC)
R.S.
Return thermistor (NTC)
Fig. 49
F Hv
brown
blue
CN3
1
2
NOTE: L-N-E connection is advisable
7
1
CN9
D.H.W.T.
D.H.W.F.S.
red
red
violet
violet
-t°
3
CN4
1
brown (heat)
black (D.H.W)
blue
Heat
3
D.H.W.
1
N
2
3W
TSC2
S.E
N
F
3
yellow/green
blue
brown
CN1
1
2
red (+)
blue (HS)
pink (PWM)
grey (-)
F Lv
4
1
R.S
F.T
F.S
F.O.H.T
-t°
-t°
-t°
white
blue
blue
white
white
red
red
grey
black
grey
CN11
1
12
CN8
CN7
1
12
CN11
1
4
CN10
1
7
CN9
CN6
CN5
CN12
CN4
1
3
CN3
1
2
CN2
1
6
AKL07N1 GAR
CN1
1
FA1
FA2
CN15
P3
P1
CN13
CN14
SW1
F1
3.15A T
L1
L3
L2
CN16
CN17
1
orange
F.S.(1)
Room Thermostat
(Voltage free contact input)
-t°
Open therm
OT+
External sensor
rosso (+)
giallo (B)
arancione (A)
nero (-)
SC0x
6
5
1
2
3
4
3
2
1
rosso (+)
nero (-)
CN8
CN13
giallo (B)
arancione (A)
blue
brown
2
1
3
5
4
1
2
4
3
OPE
OPE
P
N
L
F
brown
brown
blue
blue
brown
brown
pink
blue
blue
6
CN2
1
M3
GAS VALVE
230 V
Fuse 3.15A F
P.T
1
3
3
2
1
CN17
brown (-)
blue (sign.)
black (alim.)
CN10
