35
STV2I ed 11/09
VICTRIX 2 I Export
Technical Documentation
Technical Documentation
Electric circuit.
CH mode.
sanitario
riscaldamento
CENTRAL HEA
TING
DOMESTIC HO
T
W
ATER
WINTER
L
OGIC-C
ONTR
OLS MICR
OPR
OCESSOR
ONE RELAY
BOARD
(OPTIONAL)
ZONES CONTROL
UNIT (OPTIONAL)
SAFETY EXTRA LOW VOLTAGE CIRCUIT
FAN SPEED
ONE RELAY
BOARD
(OPTIONAL)
Operating with room thermostat.
The main switch (S2) in “WINTER" position enables fun-
ctioning in the CH mode.
On closure of the room thermostat contact (S20), the inte-
grated P.C.B. powers the boiler pump (M1) by means of the
contact of the K2 relay. The motor (M) of the 3-way valve
is powered simultaneously through the diversion of the K4
relay contact (M30). The motor functions until the limit
switch "2" opens in when the central heating position has
been reached.
If the contact of the system flow switch (S40) is closed (
circu-
lation/water flow rate in the primary circuit above the minimum
value
) and if the temperature detected using the central heating
flow NTC probe (B1) is lower than that set on the control
panel with the central heating potentiometer, the low voltage
circuit starts the fan (M20) and successively closes the contact
of the K3 relay request.
This makes sure the ignition is powered (G2), which allows
to start the ignition cycle by powering the ignition electrodes
(E1).
In the meantime, the low voltage circuit excites the relay K1
causing the closure of the 2 contacts, which with the consent of
the flue safety thermofuse (E14), exchanger safety thermofuse
(E13) and the overheating thermostat (E4), power both the
coils of the gas valve (Y1).
The ignition of the burner is detected by the integrated P.C.B.
by means of the ionisation electrode (E2).
Operating with Comando Amico Remoto remote
control.
The main switch (S2) in “SUMMER and CAR" position ena-
bles the integrated P.C.B. and the Comando Amico Remoto
remote control (CAR).
If the conditions detected by the Comando Amico Remoto
remote control (CAR) require ignition in CH mode (
CAR
SUM/WIN selector switch in WINTER position, CH temperature
adjustment higher than that detected by the central heating flow
probe (B1), room temperature adjustment higher than that detec-
ted
), the P.C.B. powers the boiler pump (M1) by means of the
relay K2 and ignition takes place as described previously.
N.B.:
In both cases, at every switch-off owing to the tempera-
ture being reached, the integrated P.C.B. blocks burner fun-
ctioning in CH mode for 180 seconds, which can be reduced
to 30 seconds by operating on the relevant "S7" jumper (
see
integrated P.C.B. functioning).
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