FAMILY
[EN] -
Multiwire wiring diagram
"L-N" POLARITY IS RECOMMENDED
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
D = Voltage free contact input
AKM0X
Control board
REC
Remote control panel
X1-X25-CN1 Connection connectors
S.W.1
Chimney sweep and interruption of the vent
cycle
208
E.R.
Flame detection electrode
F
External fuse 3.15A F
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 must
be free of voltage)
TBOL
Not used
TBT
Low temperature limit thermostat
SE
Outdoor temperature sensor
OT+
Open therm
SBOL
Not used
X1 - X2
Not used
P
Pump
PWM
PWM signal pump modulation
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 flow sensor on primary circuit
S.R.
Temperature return sensor on primary circuit
F.S.
Domestic hot water flow switch
S.S.
Domestic hot water circuit temperature probe
T.P.
Pressure transducer
MOD
Modulator
V Lv
Fan control signal
3V
3-way valve stepper servomotor
Fig. - Abb. 3