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STV2I ed 11/09
VICTRIX 2 I Export
Technical Documentation
Technical Documentation
It is a signal coming from the integrated P.C.B. By means of an opto-isolator it allows
the ignition spark.
Igniter signal
(N3)
Allows the control of 1 additional zone valve by means of CAR, which must be set in On/
Off mode
(see CAR functioning).
P.C.B. to a relay
(
optional
)
Outputs.
It is a unipolar relay for pump control (M1) that is excited when its functioning is re-
quested.
Pump Relay
(K2)
It is a unipolar relay that is excited when burner ignition is necessary. The boiler is ignited
by means of its contact.
Relay Request
(K3)
It is a signal that allows the zone control unit to know the functioning status of the appliance
(domestic hot water/central heating) and, if mounted to recognise the CAR as the room
thermostat in zone 1
(see Zones control unit technical board functioning).
Zones control unit (CZ)
(
external optional
)
It is a signal (BUS) that shows boiler temperature, functioning in DHW and Ch mode,
the alarm codes that have intervened and the temperature detected by any external probe
on the remote control display.
Comando Amico Remoto re-
mote control (CAR) (
optional)
(see CAR functioning
)
It is a unipolar relay that allows to power the motor (M) of the electric 3-way valve
(M30).
It is excited with a central heating request and remains in stand-by with a domestic hot
water request.
Three-way valve relay
(K4)
(
on combi version only
)
It raises the voltage (
greater than 16 kV
) causing an electrical spark at the ends of the
ignition electrodes, positioned on the burner.
Igniter
(G2)
It is a bipolar relay that allows to power the gas valve coils, with consent of the safety
thermostat, flue safety thermofuse and the exchanger safety thermofuse.
Gas valve relay
(K1)
It is a positive square wave signal with variable ON-OFF relationship (
duty-cycle
) that
controls the fan.
Allows to vary the air flow rate to the Venturi pipe and therefore the gas pressure to the
burner.
Fan
It is a square wave signal detected with a Hall effect sensor inserted into the fan. It allows
the board to measure the speed and correct it if it does not comply with the requested
value.
Fan speed
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