33
FUNCTIONAL DIAGRAM
Fig. 51
brown
CN3
blue
F Hv
1
2
7
1
CN9
W.P.S.
2
3
1
D.H.W.T.
white
white
red
red
violet (+)
orange(−)
F.M.
blue (out)
3
1
orange(−)
blue (out)
violet (+)
3W
2
N
1
D.H.W.
3
Heat
black
brown
blue
3
1
CN4
AKL
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
P4
P3
P2
P1
CN13
CN14
F1
3.15A T
CN12
CN5
CN6
CN1
1
1
6
1
2
1
3
CN2
CN3
CN4
L1
L2
L3
1
12
CN11
1
4
CN10
1
7
CN9
FA1
FA2
1
5
CN7
1
3
CN8
CN15
SW1
1
4
black
black
orange
orange
pink
pink
ROOM
THERMOSTAT
(24 Vdc)
−t°
EXTERNAL
SENSOR
black
M6
F.S. (1)
orange
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
brown
blue
1
2
3
AMP
1
2
3
AMP
pink
pink
blue
brown
4 4
Connector
OT+
pink
pink
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.
brown
blue
white
white
EXTERNAL
ALARM
M2
white
4
1
1
3
orange
red
black
red
black
orange
CN8
J1
J1
VIS MEDIUM
AKL
Main
PCB
P1
Selector switch and heating potentiometer
P2
DHW potentiometer
P3
Potentiometer to select temperature regulation curve
P4
Unused
JP1
Enabling front setting knob (Range rated)
JP2
Unused
JP3
Setting (see “Setting and adjusting” paragraph)
JP4
Unused
JP5
Unused
JP6
Unused
JP7
Unused
JP8
Closed - Unused
LED
Led 1 (green) working status or temporary stop
Led 2 (yellow) CO2 function ON
Led 3 (red) boiler lock out
CN1-CN15 Connectors S.W
.
CO2 function button
F.S. (1)
Flame sensor
F1
Fuse 3.15A
T
F
External fuse 3.15A
F
M3
Terminal strip for electrical connection high power
M2
Terminal strip for room thermostat (24 Vdc)
P
Pump
OPE
Gas valve solenoids
F Hv
Fan power supply 230 V
F Lv
Fan signal control
D.H.W
.F
.S
Domestic hot water
fl
ow
switch
D.H.W
.T
Domestic hot water temperature
WPS
W
ater pressure switch
S.E. Spark
electrode
TSC2 Ignition
transformer
3W
3 way motor
F.O.H.T
Flow over heat thermostat
FS Flue
sensor
FT
Flow thermistor (NTC)
RS
Return thermistor (NTC)
J1
Connector