Ariston 41-116-05 INITIAL START-UP 4.5 COMBUSTION ANALYSIS, Fume Discharge Monitoring

4.4INITIAL START-UP

4.5COMBUSTION ANALYSIS

THE CHECKS TO BE RUN BEFORE INITIAL START-UP ARE AS FOLLOWS:

1.Make sure that:

-the screw on the automatic air valve has been loosened when the system is full;

-If the water pressure in the system is below 1.5 bar, bring it up to the appropriate level;

-Ensure that the gas cock is closed;

-Make sure that the electrical connection has been made properly and that the earth wire is connected to an efficient earthing system;

-Supply power to the boiler by pushing the On/Off button “A” (see FIG.4.1) - the L.E.D. “B” will illuminate. Then push the button “C” in for central heating - the L.E.D. “D” will illuminate. This will start the circulation pump. After 7 seconds, the boiler will signal a shutdown due to ignition failure. Leave the boiler as it is until all of the air has been bled from the system.

-Loosen the cap on the head of the pump to eliminate any air pockets;

-Repeat the procedure for bleeding the radiators of air;

-Check the system pressure and, if it has dropped, open the filling loop again to bring the pressure back up to 1.5 bar.

2.Make sure that all gate valves are open;

3.Turn on the gas cock and check the seals on the connections with an approved soap solution and eliminate any leaks.

4.Press the reset button “E” for the lighting system; the spark will light the main burner. If the burner does not light the first time, repeat the procedure.

5.Check the minimum and maximum pressure values for the gas going to the burner; adjust it if needed using the values indicated in the table in section 5 (See the relative section for burner pressure adjustment within the servicing manual).

FIG. 4.2

4.6FUME DISCHARGE MONITORING

In the boiler, it is possible to monitor the correct operation of the flue exhaust/air intake, checking for a loss of general pressure in the system. Through the use of a differential manometer connected to the test points of the combustion chamber, it is possible to detect the ∆ P of operation of the air pressure switch.

The value detected should not be less than 0.5 mbar under conditions of maximum thermal power in order for the boiler to function properly and without interruption.

The flue connector has two apertures, readings can be taken for the temperature of the combustion by-products and of the combustion air, as well as of the concentrations of O2 and CO2,

etc. .

To access these intakes it is necessary to unscrew the front screw and remove the metal plate with sealing gasket.

To achieve the best test conditions, turn the central heating adjustment knob “G” to the “max” position and remove the electrical connection to the heating sensor (see section 6.). This will allow the appliance to operate at the maximum heating power.

FIG. 4.3

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