29
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3.3 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
The following checks and maintenance should be
performed at least once a year to ensure operation,
safety and efficiency 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.
- Visually check the draught-breaker/anti-wind device for
deterioration or corrosion.
- Check correct lighting and operation.
- Ensure correct calibration of the burner in domestic water
and central heating phases.
- Check correct operation of control and adjustment devices
of the appliance. and in particular:
- intervention of main electrical switch positioned outside of
the boiler;
- system control thermostat intervention;
- domestic hot water control thermostat intervention.
- Check tightness 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.
- Visually check for water leaks or oxidation from/on connec-
tions.
- Visually check that the drain of the water safety valves is not
blocked.
- Check that, after discharging system pressure and bringing it
to zero (read on boiler pressure gauge), the expansion vessel
load is at 1.0 bar.
- Check that the system static pressure (with system cold and
after refilling the system by means of the filling valve) is be-
tween 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;
- water pressure switch;
- flue exhaust control thermostat.
- Check the condition and integrity of the electrical system and
in particular:
- electrical power cables must be inside the fairleads;
- there must be no traces of blackening or burning.
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.
Summary of Contents for NIKE ECO 24
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