Immergas 3.028358, Инструкции и рекомендации

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3.3 YEARLY APPLIANCE CHECK AND
MAINTENANCE
The following checks and maintenance should be per-
formed once a year to ensure operation, safety and effi-
ciency of the appliance over time.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- Check the correct positioning, integrity and cleanliness of the
detection and ignition electrode; remove any oxide present.
- If deposits are detected in the combustion chamber they must
be removed and the heat exchanger coils must be cleaned using
nylon or broomcorn brushes; it is forbidden to use brushes
made of metal or other materials that may damage the combus-
tion chamber. It is also forbidden to use alkaline or acid deter-
gents.
- Check the integrity of the insulating panels inside the combus-
tion chamber and if damaged replace them.
- Visually check for water leaks or oxidation from/on connec-
tions and traces of condensate residues inside the sealed cham-
ber.
- Check the contents of the condensate drain trap.
- Visually check that the siphon is properly filled with condensate
and top it up if necessary.
- Check that there are no material residues in the condensate
drain siphon clogging the condensate passage; also check that
the entire condensate drainage circuit is clear and efficient.
- In the event of obstructions (dirt, sediment, etc.) with conse-
quent leakage of condensate in the combustion chamber, one
must replace the insulating panels.
- Check that the burner and gas manifold seal gaskets are intact
and perfectly efficient, otherwise replace them. In any case the
gaskets must be replaced at least every two years, regardless of
their state of wear.
- Check that the burner is intact, that it has no deformations or
cuts and that it is properly fixed to the combustion chamber lid;
otherwise it must be replaced.
- Visually check that the water safety drain valve is not blocked.
- Check that, after discharging the system pressure and bringing
it to zero (read on boiler pressure gauge), the expansion vessel
pressure is at 1.0 bar.
• system regulation probes intervention;
• Domestic hot water control thermostat intervention.
- Check sealing efficiency of gas circuit and the internal system.
- Check the intervention of the device against no gas ionisation
flame control. Intervention time must be less than 10 seconds.
- Check that the system static pressure (with system cold and af-
ter refilling the system by means of the filling valve) is between 1
and 1.2 bar.
- Check visually that the safety and control devices have not been
tampered with and/or shorted, in particular:
- temperature safety thermostat;
- system pressure switch.
- Check the condition and integrity of the electrical system and in
particular:
• The power cables must be inside the cable fixings;
• There must be no traces of blackening or burning.
- Check the CO2 by using the chimney sweep function at the
three reference heat outputs, using the parameters in the table
below. Should values out of the indicated tolerance range be de-
tected, check the integrity of the ignition / detection electrode
and, if required, change it, also changing the relative gasket. At
this point, activate the “complete calibration” function.
- Check the CO2 by using the chimney sweep function at the two
reference heat outputs, using the parameters in the table below.
Should values out of the indicated tolerance range be detected,
check the integrity of the ignition / detection electrode and, if
required, change it, also changing the relative gasket. At this
point, activate the "Adjustment of the air-gas ratio" function.
- Check correct operation of control and adjustment devices and
in particular:
• system regulation probes intervention;
• Domestic hot water control thermostat intervention.
- Check sealing efficiency of gas circuit and the internal system.
- Check the intervention of the device against no gas ionisation
flame control. Intervention time must be less than 10 seconds.
Gas
type CO
2
to
nominal Q.
CO
2
to
ignition Q.
CO
2
to
minimum Q.
G20 9.2% (± 0,5) 9% (± 0,5) 9% (± 0,5)
G31 10.2% (± 0,5) 10% (± 0,5) 10% (± 0,5)
In addition to yearly maintenance, one must also check
the energy efficiency of the thermal system, with fre-
quency and procedures that comply with the indications
of the technical regulations in force.