26
Maxima 35 C
• Make sure that the unit is connected to a good earthing system.
• Make sure there are no flammable liquids or materials in the immediate vicinity of the boiler.
• Vent and spin pumps.
• Ensure flue system is correctly fitted, including terminal locations.
Ignition
• Open the gas valve upstream of the boiler.
• Purge the air from the installation pipework to the appliance.
• Swith on boiler fused spur.
• Press the ON/OFF key (see fig.1).
• The boiler is now ready to function automatically whenever hot water is drawn or the room
thermostat and clock calls for heating.
In case of an electrical power failure while the boiler is working, the burner will go out.
When power returns, the boiler will run the self-test cycle again, after which the burner will
automatically re-ignite (if there is still demand for heat).
Checks during operation
• Check for water leaks.
• Check the efficiency of the flue and air ducts while the boiler is operating.
• Check that the water is circulating properly between the boiler and the systems.
• Make sure that the gas valve modulates correctly in both the heating and hot water production
phases.
• Check for correct ignition of the boiler by performing various tests, turning it on and off with
the room thermostat or remote control.
• Make sure that the fuel consumption indicated on the gas meter corresponds to that given in
the technical data table in chap. 4.
• Check there is the right flow rate of hot water with the
∆
t stated in the chart. The measurement
should be made with specific instruments and as close as possible to the boiler, also consider
the heat lost from the pipes.
• Make sure that with no call for heating the burner correctly ignites on opening a hot water tap.
Check that during heating operation, on opening a hot water tap, the heating circulator stops
and there is a production of hot water.
3.3 Maintenance
The following operations are strictly reserved for Qualified Personnel, such as corgi registered
engineers or Ferroli personeer.
Seasonal inspection of the boiler and fl ue
It is advisable to carry out the following checks at least once a year:
• The control and safety devices (gas valve, flow meter, thermostats, etc.) must function correctly.
• The flue terminal end piece and ducts must be free of obstructions and leaks.
• The gas and water systems must be sound.
• The burner and exchanger must be clean.
• The electrodes must be free of scale and properly positioned.
• The water pressure in the cold water system must be approx 1 bar; otherwise, bring it to that value.
• The expansion vessel must be filled to 1 bar cold with zero system pressur.
• The gas flow and pressure must correspond to that given in the respective tables.
• The circulating pumps must be vented and free of debris.
• The returned filter cleaned.
