Operating instructions

Page 19
Victrix Zeus 20/27 Instructions
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 modes.
- Verify correct operation and adjustment of the boiler, in particular:
- operation of the electrical main switch on the boiler;
- operation of the system control thermostat;
- operation of the domestic water control thermostat.
- Ensure gas soundness of the gas intake circuit; insert a “U” or digital type pressure gauge in the pressure
test point upstream of the gas valve and then close the boiler shutoff valve. No pressure variation must
occur in the next five minutes on the gauge.
- Ensure activation of the device for protection against the ionisation flame control gas; activation time must
be less than ten seconds
- Visually inspect to check for leakage of water or oxidation of fittings.
- Check visually that the water safety valve outlets are not blocked and that the tundish is clear.
- Check that the charge of the expansion vessel after discharging system pressure to the zero setting
(check via boiler pressure gauge), is at 1,0 bar.
- Check that the system static pressure (in cold conditions 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 particu-
lar:
- temperature safety thermostat;
- air pressure switch.
- Check the integrity of boiler Magnesium Anode.
- Ensure correct maintenance and condition of the electrical installation with particular reference to:
electrical cables must be correctly routed
no traces of black marking or burns
Annual maintenance procedures