Dhw Mode - Immergas VICTRIX 26 2 I Manual

Technical Documentation
Electric circuit.

DHW mode.

Operation.
The main switch (S2) in "SUMMER or WINTER" position
enables functioning in the DHW mode.
A withdrawal of DHW causes the contact to close (S4). If the
temperature detected by the DHW NTC probe (B2) is below
that set on the control panel (or on the CAR if mounted), the
integrated P.C.B. powers the boiler pump (M1) by means 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 "3" opens
in when the DHW position has been reached.
If the contact of the system flow switch (S40) is closed (circula-
tion/water flow rate in the primary circuit higher than minimum
value), the low voltage circuit starts the fan (M20) and succes-
sively 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).
STV2I ed 11/09
ONE RELAY
BOARD
(OPTIONAL)
Technical Documentation
SAFETY EXTRA LOW VOLTAGE CIRCUIT
WINTER
FAN SPEED
36
ZONES CONTROL
UNIT (OPTIONAL)
ONE RELAY
BOARD
(OPTIONAL)
VICTRIX 2 I Export