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STVZ ed 02/06 VICTRIX Zeus
Technical Documentation
Technical Documentation
Electrical circuit.
Heating phase.
Operating with a room thermostat.
With the main switch (IG) on WINTER it powers the
modulating control board and enables operation in the heat-
ing mode.
When the room thermostat contact (TA) closes, the low volt-
age circuit starts the pump (MP) by means of the K2 relay
contact.
e flow of water intercepts the pump pressure switch (SP)
whose contact, on closing, energises the coil of relay K3.
At the same time, the adjustment circuit causes the relay K1
contact to divert until the 3-way diverter valve (VD) motor (M)
is powered. is motor keeps working until the limit switch
“N” opens when the central heating position is reached.
If the temperature measured by the NTC heating sensor (NR)
is below that set on the control panel with the heating poten-
tiometer, the low voltage circuit starts the fan (MV) and then
closes the contact of the request relay (K3).
Hence the control unit (IGN. BOARD) starts the ignition
cycle, first energising the ignition electrodes (E1-E2) and
then with the possible tripping of the fume thermostat (TF)
both gas valve coils (V/G) after it has been enabled by the
overtemperature thermostat (TS).
Burner ignition is detected by this same control unit (IGN.
BOARD) by way of the ionisation electrode (E3).
Operation with the Remote Control.
With the main switch (IG) on SUMMER, the modulating
control board and the Amico Remote Control (CR) are
powered.
If the conditions detected by the Amico Remote Control (CR)
require ignition in the heating phase (CAR SUM/WIN selector
switch on WINTER, heating temperature setting above that de-
tected by the heating sensor (NR), room temperature setting higher
than that read), the board turns the pump (MP) on by means
of relay K2 and ignition occurs as described above.
Note: In both cases, each time the control unit switches off due to
the set temperature having been reached, the modulating control
board turns the burner off in the heating phase for 180 seconds.
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