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EXCLUSIVE
[EN] – Multi wire wiring diagram
Blu=Blue/Marrone=Brown/Nero=Black/Rosso=Red/Bianco=White/
Viola=Violet/Rosa=Pink/Arancione=Orange/Grigio=Grey/Giallo=Yellow/
Verde=Green
A = Gas valve
B = 230V auxiliary
C = Not used
D = Voltage free contact input
AKM0X
Control board
REC
Remote control panel
BE20
Board led:
green led (operating or temporary stop)
red led (boiler in lockout)
X1-X25-CN1 Connection connectors
S.W.1
Chimney sweep and interruption of the venting cycle
E.R.
Flame detection electrode
F
External fuse 3.15A T
F2
Fuse 4A T
M3-M4
Terminal board for external connections: 230V
M20
Electrical box for external connections
(- A B +) Bus 485
TA
Room thermostat (contact without voltage)
TBOL
Not used
12
11
10
9
8
7
6
5
4
3
2
D
Via Risorgimento 13 - 23900 Lecco (LC) Italy
Caldaia a condensazione
Condensing boiler
D:
Serial N.
230 V ~ 50 Hz
W
NOx:
Pmw = bar T=
°C
IP
Pms =
bar T=
°C
42
13 14
15
16
1
C
B
A
l/min
Qn
Qn
Qm
80-60 °C
80-60 °C
Qn (Hi) =
kW
kW
kW
Pn =
kW
kW
kW
TBT
SE
OT+
SBOL
X1 - X2
P
Pump
PWM
PWM signal
OPE
Gas valve operator
V Hv
Fan power supply 230 V
C.S.A.
Semi-automatic heating system loading
TSC2
Ignition transformer
E.A.
Ignition electrode
T.L.A.
Water limit thermostat
S.F.
Flue gas probe
S.M.
Temperature low sensor on primary circuit
S.R.
Temperature return sensor on primary circuit
F.L.
Domestic hot water low switch
S.S.
Domestic hot water circuit temperature probe (NTC)
T.P.
Pressure transducer
MOD
Modulator
V Lv
Fan control signal
3V
3-way valve stepper servomotor
[EN] - Water circuit
A
Cold water inlet
B
Hot water outlet
C
Heating delivery
D
Heating return
1
Non-return valve
2
Drain valve
3
Safety valve
4
Automatic by-pass
5
Three-way valve
6
Circulator
7
Lower air vent valve
8
Pressure transducer
17
9
Pressure gauge
10
Expansion vessel
18
11
NTC return probe
12
Primary heat exchanger
13
NTC delivery probe
14
Limit thermostat
1
15
Upper air vent valve
19
16
Air/water separator
17
DHW exchanger
20
18
Domestic hot water NTC probe
1
19
Filling solenoid
20
Filling tap
21
Flow rate limiter
21
22
Flow switch
23
DHW filter
22
23
[EN] -
Qn
Pn
Qmin
Qn
Qm
80-60 °C
50-30 °C
Qmin Minimal heat output
kW
IP
kW
kW
Pmw Maximum DHW pressure
Pms Maximum heating pressure
T
D
NOx NOx class
Low temperature thermostat
Outdoor temperature sensor
Open therm
Not used
Not used
Serial number plate
Domestic hot water function
Heating function
Nominal heat delivery
Nominal heat output
Reduced heat delivery
Degree of Protection
Temperature
Speciic low rate
3
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