Yearly Appliance Check And Maintenance - Immergas VICTRIX EXA 28 1 ERP Instruction Booklet And Warning

3.3 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
The following checks and maintenance should be per-
formed at least once a year.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- Check the correct positioning, integrity and cleanliness of the
detection and ignition electrodes; remove any oxide present.
- If deposits are detected in the combustion chamber one must
remove them and clean the heat exchanger coils using nylon or
sorghum brushes; it is forbidden to use brushes made of metal
or other materials that may damage the combustion chamber
itself. It is also forbidden to use alkaline or acid detergents.
- Check the integrity of the insulating panels inside the com-
bustion chamber and if damaged replace them.
- Visually check for water leaks or oxidation from/on fittings
and traces of condensate residues inside the sealed chamber.
- Check contents of the condensate drain trap.
- Via the condensate drain cap check that there are no residues
of material that clog condensate passage; also check that the
entire condensate drain circuit is clear and efficient.
In the event of obstructions (dirt, sediment, etc.) with con-
sequent leakage of condensate in the combustion chamber,
one must replace the insulating panels.
- Check that the burner seal gaskets and the lid 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 clogged.
- Check that, after discharging system pressure and bringing it
to zero (read on boiler pressure gauge), the expansion vessel
pressure is at 1.0 bar.
- Check that the system static pressure (with system cold and
after refilling the system by means of the filling cock) is be-
tween 1 and 1.2 bar.
- Visually check that the safety and control devices have not
been tampered with and/or shorted, in particular:
- temperature safety thermostat;
- Check the condition and integrity of the electrical system and
in particular:
- supply voltage cables must be inside the fairleads;
- there must be no traces of blackening or burning.
- Check ignition and operation.
- Check the CO by using the chimney sweep function at the
2
reference heat outputs, using the parameters in the table
below. Should values out of the indicated tolerance range be
detected.
- Check correct calibration of the burner in domestic hot water
and central heating phases.
48
- Check the operation of the appliance control and
adjustment devices and in particular:
- system regulation probes intervention;
- domestic hot water control thermostat intervention.
- Check sealing efficiency of the gas circuit and the
internal system.
- Check the intervention of the device against no gas ionisation
flame control. The relative intervention time must be less than
10 seconds.
Victrix EXA 28 1 ErP
CO at nominal output
2
(99 %)
G 20 9,40 % ± 0.2
G 31 10,80 % ± 0.2
Victrix EXA 32 1 ErP
CO at nominal output
2
(99 %)
G 20 9,60 % ± 0.2
G 31 11,20 % ± 0.2
In addition to yearly maintenance, one must also
check the energy efficiency of the thermal system,
with frequency and procedures that comply with the
indications of the technical regulations in force.
CO at minimum output
2
(0 %)
8,60 % ± 0.2
10,40 % ± 0.2
CO at minimum output
2
(0 %)
8,70 % ± 0.2
9,60 % ± 0.2