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3.4

Initial Start-up

3.5

Operational

Adjustments

B004

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 bar, bring it up to the appro-

priate level;

- Check to see whether 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 pressing the On/Off switch <L> - the L.E.D. "I"

will turn on - turn the selector knob "C" to the <winter> setting. This will

start the circulation pump. After 7 seconds, the boiler will signal a shut-

down due to failure ignition. Leave the boiler as it is until all of the air has

been bled from the lines.

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

- Repeat the procedure for bleeding the radiators of air;

- Open the taps for a brief period;

- Check the system pressure and, if it has dropped, open the filling loop

again to bring the pressure back up to 1 bar.

2. Check the exhaust flue for the fumes produced by combustion.

3. Make sure that all gate valves are open;

4. Turn on the gas cock and check the seals on the connections, including the

one for the burner, making sure that the meter does not signal the passage

of gas. Check the connections with a soap solution and eliminate any leaks.

5. Press the reset button "A" for the lighting system; the spark will light the

main burner. If the burner does not light the first time, repeat the procedure.

6. 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 4.

(See sect of the servicing manual).

The boiler was designed to make regulation easy. To access the adjustment

and control area, simply remove the cover by unscrewing the screws "A" and

"C" and lift up the small service panels "B1" and "B2" respectively. The first pro-

vides access to the control (low voltage) P.C.B., while the second makes it pos-

sible to work on the power supply P.C.B.

The service panel "B2" also provides access to:

- the power supply cord connector;

- the fuses;

- the selector knob for continuous

operation of the circulation pump.

The service panel "B1" also provides access to:

- the potentiometer for regulating the ignition delay (anti-cycling) feature, which

can be set from 0 to 2 minutes (factory set at 1 minute);