Troubleshooting; Converting The Boiler To Other Types Of Gas - Immergas VICTRIX EXA 24 X 1 ERP Instruction Booklet And Warning

Storage tank unit.
The boiler is prepared for connection to a storage tank unit, which
must be connected to clamps 36 and 37 of the terminal board,
eliminating resistance R8.
Comando Amico Remoto
The boiler is prepared for the application of the Comando Amico
Remoto remote control (CAR
V2
clamps 41 and 44 of the terminal board respecting the polarity
and eliminating jumper X40.
Room thermostat ON-OFF.
The boiler is prepared for the application of the room thermostat
(S20), which must be connected to clamps 40 and 41 of the ter-
minal board eliminating jumper X40.
The connector X5 is used for the connection to the relay board.
The connector X6 is used for automatic inspection and for connec-
tion to the VIRGILIO Palmtop during maintenance operations.
The connector X8 is used for the connection of the VIRGILIO
Palmtop when updating the microprocessor software.

3.6 TROUBLESHOOTING.

Maintenance interventions must be carried out by an
authorised company..
• Smell of gas. Caused by leakage from gas circuit pipelines. Check
sealing efficiency of gas intake circuit.
• Repeated ignition blocks. No gas, check the presence of pressure
in the network and that the gas adduction cock is open.
• Incorrect adjustment of the gas cock. Check the correct cali-
bration of the gas valve.
• Irregular combustion or noisiness. It may be caused by: a
dirty burner, incorrect combustion parameters, intake-exhaust
terminal not correctly installed. Clean the above components
and ensure correct installation of the terminal, check correct
setting of the gas valve (Off-Set setting) and correct percentage
of CO in flue gas.
2
• Frequent interventions of the overheating safety thermostat.
It can depend on the lack of water in the boiler, little water circu-
lation in the system or blocked pump. Check on the manometer
that the system pressure is within established limits. Check that
the radiator valves are not closed and also the functionality of
the pump.
• Drain trap clogged. This may be caused by dirt or combustion
products deposited inside. Check, by means of the condensate
drain cap, that there are no residues of material blocking the flow
of condensate.
• Heat exchanger clogged. This may be caused by the drain trap
being blocked. Check, by means of the condensate drain cap, that
there are no residues of material blocking the flow of condensate.
• Noise due to air in the system. Check opening of the special air
vent valve cap (Part. 14 Fig. 35). Make sure the system pressure
and expansion vessel pre-charge values are within the set limits;
The factory-set pressure values of the expansion vessel must be
1.0 bar, the value of system pressure must be between 1 and 1.2
bar.
50
.
V2
), which must be connected to
V2
• Noise due to air inside the condensation module. Use the
manual air vent valve (Part. 14 Fig. 35) to eliminate any air
present in the condensation module. When the operation has
been performed, close the manual vent valve.
• Poor production of D.H.W. If a drop in performance is detected
during supply of D.H.W., it is possible that the condensation
module or D.H.W. heat exchanger is clogged.
Red pump LED.
There can be three possible causes for this anomaly:
• Low power supply voltage. When the minimum voltage is rea-
ched after about 2 seconds, the LED switches from green to red
and the pump stops. Wait for the power supply voltage to rise;
when the pump restarts, the LED will turn green again with a
delay of about one second.
Note: obviously the flow rate decreases as the supply voltage
decreases.
• Rotor seized. Powering the pump with the rotor seized, after
about 4 seconds the LED switches from green to red. Carefully
act on the screw in the middle of the head to manually release
the crankshaft; circulation starts up immediately after the rotor
is released and the LED switches from red to green after about
10 seconds.
• Electrical error. Pump, wiring or P.C.B. fault. Check the indi-
cated components.
3.7 CONVERTING THE BOILER TO OTHER
TYPES OF GAS.
If the boiler has to be converted to a different gas type
to that specified on the data nameplate, request the
relative conversion kit for quick and easy conversion.
The gas conversion operation must be carried out by an au-
thorised company.
To convert to another type of gas the following operations are
required:
- disconnect the appliance;
- replace the nozzle located between the gas pipe and gas/air
mixing sleeve (Part. 9 Fig. 35);
- re-power the appliance;
- calibrate the number of fan revolutions (Parag. 3.9):
- seal the gas flow rate regulation devices (if settings are mod-
ified);
- after completing the conversion, apply the sticker, contained in
the conversion kit, near the data nameplate. Using an indelible
marker pen, delete the data relative to the old type of gas.
These adjustments must be made with reference to the type of
gas used, following that given in the table (Par. 4.1).