Immergas EOLO Maior - Annual Appliance Maintenance

TECHNICIAN
INSTALLER
USER
29
3.12 Annual appliance maintenance.
The following checks and maintenance should be
performed at least once a year.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- Make a visual inspection of the flue extraction hood
for wear or corrosion.
- Ensure correct ignition and operation.
- Ensure correct settings of the burner in domestic
water and heating phases.
- Verify correct operation and adjustments of the ap-
pliance, in particular:
- activation of the electrical main switch on the
boiler;
- activation of the system control thermostat;
- activation of the domestic water control thermo-
stat.
- Ensure sealing efficiency of the gas intake circuit;
insert a “U” or digital type pressure gauge in the
pressure socket upstream of the gas valve and sub-
sequently closing the boiler shutoff valve (cock) and
closing the gas valve, no pressure variation must
occur in the next five minutes on the gauge.
- Ensure activation of the device for protection
2
2
3
1
against the ionisation flame control gas; activa-
tion time must be less than ten seconds.
- Visually inspect to check for leakage of water or
oxidation of relative couplings.
- Check visually that the water safety drain valve is
not blocked.
- Check that the charge of the expansion vessel af-
ter discharging system pressure to the zero set-
ting (check via boiler pressure gauge), is at 1,0
bar.
- Check that the system static pressure (in cold con-
ditions and after system recharging via 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;
- c.h.water switch;
- air pressure switch.
- Ensure correct maintenance and condition of the
electrical installation with particular reference to:
- electrical cables must be inside the channels;
- no traces of black marking or burns.