Immergas VICTRIX 24 kW - Low Voltage Circuit

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STVkW ed 07/08 VICTRIX 24 kW Export
Technical Documentation
Technical Documentation
Allows the integrated P.C.B. to detect the temperature of the pri-
mary circuit ow water.
Its breakage (signalled by relative anomaly) blocks burner functioning
both in central heating and domestic hot water modes.
It is positioned at the exit of the main heat exchanger.
Flow probe
(B1)
NTC probe
10 kΩ 25 °C
It allows the integrated P.C.B. to detect the temperature of the
exiting domestic hot water.
Its breakage (signalled by relative anomaly) however allows the
boiler to continue working in the DHW mode even though not
optimally.
It is positioned at the end of the hot water exit pipe.
N.B.: for the VICTRIX 24 kW X model it must be inserted into a
bulb-holder in contact with the external wall of the storage tank.
If the DHW probe is installed, the resistance (R8) (value 2.2 kohm
1/4 W) must be eliminated.
Domestic hot water probe
(B2)
NTC probe
10 kΩ 25 °C
Detects the external temperature and allows the integrated P.C.B.
to vary the ow temperature depending on the external tempera-
ture.
External probe
(B4) (optional)
PTC probe
1 kΩ 25 °C
Low voltage circuit.
Safety devices and controls.
When the pressure of the boiler circuit is below 0.3 bar it determines
burner switch-o.
System pressure switch
(S5)
Contact in
cut-o
Following withdrawal of DHW it acts on the integrated P.C.B.
causing functioning in DHW mode.
In stand-by it enables functioning in CH mode.
Domestic hot water ow
switch
(S4)
(on combi version only)
Contact in
cut-o
Depending on the position it allows:
= Low voltage circuit not powered
( ) =DHW functioning and CAR (optional).
( ) = DHW and CH operating.
RESET = Release after ignition failure or overheating safety in-
tervention, allows to activate the chimney sweep function, allows
access to the boiler calibration position.
Main selector switch
(S2)
3-position switch
+ reset position
enclosed on the
board
Allows long distance control of the generator (SUM/WIN selector
switch, temperature adjustment and indication, alarms display, reset,
etc.) and acts as weekly timer thermostat.
If the CAR is installed the pre-existing X40 jumper must be
eliminated.
Comando Amico Remoto
remote control
(CAR)
(optional)
See Comando Am-
ico Remoto remote
control functioning
(CAR)
Allows boiler functioning with 3 zone valves or external pumps
controlled by the respective room thermostats.
Zone 1 is controlled (times and temperatures) by means of the remote
control (if mounted), on which the pump anti-blocking and post-
circulation, anti-freeze, chimney sweep functions etc. take place.
Zones control unit (CZ)
(external optional)
See zones control
unit functioning