Immergas Victrix 20 - Boiler Start-Up and Preliminary Check; Wiring Diagram Victrix 20

3
BOILER STARTUP
PRELIMINARY CHECK
To start up the boiler, proceed as follows:
- ensure that the declaration of conformity of installation is
supplied with the appliance;
- check the gas supply circuit tightness with the 0n/O valves
closed and subsequently open with gas valve closed; no gas
ow must be indicated on the meter for 10 minutes.
- check that the type of gas used corresponds to that for
which the boiler is arranged;
- check connection to a 230V-50Hz power supply, correct
L-N polarity and the earthing connection;
- switch on the boiler and check correct ignition;
- check the CO
2
in the fumes at max. and min. output;
- check that the maximum, intermediate and minimum gas
owrate and relative pressure values comply with those
given in the handbook on page 32;
- check activation of the safety device in the event of no gas,
and the relevant intervention time;
- check activation of the main switch ahead of the boiler
and on the unit;
- check that the intake and/or exhaust terminals are not
blocked;
- check activation of the regulation devices;
- seal the gas ow regulation devices (if the settings are
modied);
- check the production of hot domestic water;
- check the tightness of water circuits;
- check ventilation and/or airing of the installation room
where provided.
If any safety checks give negative results, do not start the
boiler.
Remote Friend Control or Room ermostat:
e boiler is arranged for application of a Room thermostat or the
Remote Friend Control (C.A.R.). Connect the Room ermostat to
terminals 40 and 41 and remove jumper X20. e Remote Friend
3.1 Wiring diagram - Victrix 20.
Control must be connected to terminals 42 and 43 of the electronic
card, respecting the polarity and removing jumper X20.
M2 - Fan
PU1 - “Block” reset
S1 - Main rotary switch
S2 - Pump ow microswitch
S3 - Domestic circuit priority microswitch
T1 - Voltage transformer
TA - Room thermostat On/O (optional)
U1 - Rectier inside the gas valve connector (present on Honeywell and Dungs gas valves)
X20 - Room thermostat or Remote Friend Control inhibitor jumper
Y1 - Gas valve
white black black black black black white white white white white red red red red red red pink pink purple brown brown orange brown brown purple purple pink orange grey grey grey grey orange
gey-green red-black
red-black brown
red-black white-blue white-blue red-black
blue blue
blue
N.B. 
The rectifier U1 is present on boilers equipped
with Honeywell and Dungs gas valv
e
N.B.

The connectors edged in black are 
inserted on the ignition unit
Power supply
Zone station

(optional)
IGNITION/
DETECTION

UNIT
ADJUSTMENT
CARD
DISPLAY CARD
Auxiliary
output
Key:
B1 - Heating NTC sensor
B2 - Domestic circuit NTC sensor
B3 - External sensor (optional)
CAR - Remote Friend Control (optional)
DL1 - Heating mode LED
DL2 - Domestic mode LED
DL3 - Flame presence LED
E1-E2 - Igniters
E3 - Igniter sensor
E4 - Temperature safety thermostat
M1 - Circulating pump
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INSTALLERUSERTECHNICIAN
21
INSTALLERUSERTECHNICIAN