Immergas VICTRIX 24 kW Manual De Instrucciones Y Advertencias página 202

3.3 Troubleshooting.
N.B.: Maintenance must be carried out by a qualified technician (e.g. Im-
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mergas Technical Assistance Service).
- Smell of gas. Caused by leakage from gas circuit pipelines. Check sealing
efficiency of gas intake circuit.
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- Repeated ignition blocks. This can be caused by: incorrect electrical feed,
check correct L and N polarity. No gas, check pressure in mains and that
the gas supply cock is open. Incorrect gas valve adjustment, check correct
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setting of gas valve.
- Irregular combustion or noisiness. This may be caused by a dirty burner,
incorrect combustion parameters, intake-exhaust terminal not correctly
installed. Clean the above components and ensure correct installation
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of the terminal, check correct setting of the gas valve (Off-Set setting)
and correct percentage of CO2 in fumes.
- Frequent activation of the temperature overload thermostat. This may
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be caused by lack of water in the boiler, insufficient water circulation
in the circuit or a blocked circulator. Check via the pressure gauge that
values are within admissible limits. Check that radiator valves are not all
closed and that the circulating pump is working. correctly.
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- Trap clogged. This may be caused by dirt or combustion products inside.
By means of the condensate drain plug check for any residuals of material
possibly blocking the flow of condensate.
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- Exchanger blocked. This may be caused by the trap being blocked. By
means of the condensate drain plug check for any residuals of material
possibly blocking the flow of condensate.
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- Noise due to air in the system. Check opening of the cap on the special
air valve (see fig. page 193). Check that system pressure and the expansion
tank precharge are within the set limits. The expansion tank precharge
value must be 1.0 bar, and the system pressure between 1 and 1.2 bar.
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3.4 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 dataplate, request the relative conversion kit for quick and easy
conversion.
Boiler conversion must be carried out by a qualified technician (e.g. Im-
mergas Technical Assistance Service).
To convert to another type of gas the following operations are required:
- replace the nozzle located between the gas pipe and gas/air mixing sleeve
(detail 9 page 193), making sure that you cut off the power supply to the
appliance during this operation;
- enter the calibration phase (see paragraph on "calibration phase");
- adjust the boiler maximum heat output in domestic hot water and heating
phase;
- confirm the parameters and exit calibration phase;
- check the value of CO
- check the value of CO
- after completing conversion, apply the sticker, present in the conversion
kit, near the dataplate. Using an indelible marker pen, cancel 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 on page 204.
3.5 Checks following conversion to another type of gas.
After making sure that conversion was carried out with a nozzle of suitable
diameter for the type of gas used and the settings are made at the correct
pressure, check that the burner flame is not too high and that it is stable
(does not detach from the burner);
N.B.: All boiler adjustment operations must be carried out by a qualified
technician (e.g. Immergas Assistance Service).
200
in fumes at minimum power;
2
in fumes at maximum power;
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3.6 Possible adjustments.
• Rated heat output check.
The boiler rated heat output is correlated to the length of the air intake
and fume exhaust pipes. It decreases slightly in proportion to the increase
in pipe length. The boiler leaves the factory adjusted for minimum pipe
length (1 m), therefore in case of max. pipe extension, it is necessary to
check the ∆p gas values after the burner has been operating at rated power
for at least 5 minutes, when the air intake and exhaust gas temperatures have
stabilized. If necessary, enter calibration phase and adjust the rated power
in the domestic hot water and heating phase as described below, using the
values provided in the table on page 204.
- Domestic hot water rated power adjustment. Enter the calibration phase
and adjust the rated power by turning the domestic hot water temperature
adjustment dial. Turn in a clockwise direction to increase the power and
in an anticlockwise direction to decrease it.
- Adjustment of boiler rated heating power. Again during the calibration
phase, after setting the correct domestic hot water power, adjust the
heating power using the heating temperature adjustment dial. Turn in a
clockwise direction to increase the power and in an anticlockwise direc-
tion to decrease it.
Use differential manometers connected to the ∆p gas pressure points as
specified in the chapter "Air/gas ratio adjustment".
This must be checked during special maintenance operations, when
components in the air and gas circuits have been replaced, or in the case
of installations with exhaust flue systemswith a horizontal concentric pipe
longer than 1 m.
After any adjustments, make sure that:
- the pressure testers used for calibration are perfectly closed and there are
no leaks in the gas circuit;
- seal the gas flow rate regulation devices (if settings are modified).
3.7 Calibration phase.
To enter the calibration phase, proceed as follows:
- turn the domestic and heating selector to set the access code (supplied
on request);
- turn the main selector to reset for 15 seconds, then release it when the
display shows "id"; the calibration function is indicated by light-up of
the "anomaly present" symbols, the "flame" symbol and by alternate
flashing of the top and bottom segment on the power scale;
- the on function lights the boiler at the heating power determined by the
position of the domestic and heating temperature adjustment dials;
- the calibration function lasts for 15 minutes;
- to confirm the parameters entered, turn the main selector to reset for 2
seconds;
- to exit the calibration phase, simply turn the boiler off and then on
again.
3.8 Air-gas ratio adjustment.
Attention: the CO control operations must be performed with the casing
2
mounted, while the gas valve calibration operations must be performed with
the casing open and the voltage removed from the boiler.
Min. CO setting (minimum heating power).
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Enter the flue cleaning phase without withdrawing domestic hot water and
turn the heating selector switch to minimum (turn it anticlockwise all the
way round). To have an exact value of CO
must insert the sampling probe to the bottom of the chamber, then check
that the CO value is that specified in the following table, otherwise adjust
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the screw (3 page 202) (Off-Set adjuster).
To increase the CO value turn the adjustment screw (3) in a clockwise
2
direction and vice versa if the value is to be decreased.
Max. CO setting (rated heating power).
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After min. CO adjustment, turn the heating selector switch to maximum
2
(turn it fully clockwise) and again without withdrawing domestic hot water.
To have an exact value of CO in the fumes, the technician must insert the
2
sampling probe to the bottom of the chamber, then check that the CO
value is that specified in the following table, otherwise adjust the screw (12
page 202) (gas flow adjuster).
To increase the CO value turn the adjustment screw (12) anticlockwise or
2
clockwise to decrease the value.
With every adjustment of screw 12 it is necessary to wait for the boiler to
stabilize at the set value (approx. 30 sec.).
in the fumes, the technician
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2