Ariston ACO 32 MFFI Istruzioni per l'installazione e la manutenzione - Pagina 25

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3.4.

NITIAL

TART

. 3.6

. 3.7

1. Make sure that:

the cap of the automatic air release valve is loosened;

the system pressure is at least 1 bar on the

pressure gauge "F" (Fig. 3.4);

the gas cock is closed (Fig. 3.5);

the electrical connection has been carried

out in the correct manner.

To allow the air to escape from the system,

proceed as follows:

push the On/off button

knob "C" (Fig. 3.6) to the "winter" position. The boiler pump will

start up and three consecutive attempts will be made to ignite

the burner. After the third attempt, the electronic system will

shutdown the boiler, because the supply of gas has been cut off.

The message "A01" will appear on the display and the red LED

"H" will illuminate;

let the pump operate until all the air has escaped from the

system;

repeat the procedure for bleeding the radiators of air;

draw hot water for a short while;

check the system pressure and, if it has gone down, fill it with

water until it returns to 1 bar.

2. Fill the boiler condensate trap with water, by pouring 1/2 a

litre of water into the exhaust flue connector (see fig. 3.7).

N.B. In the event of a prolonged period of system shutdown,

the condensate trap should be filled before any renewed

use. A shortage of water in the trap is dangerous because it

could possibly lead to a leakage of fumes into the air.

3, Ensure that the flue is filled correctly.

4. Turn on the gas cock(fig. 3.8) 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

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

Note: Should the boiler fail to ignite check that no air is present in

the gas pipe.

The boiler is configured in the factory for the gas type in

question. To check the air/gas ratio, please refer to section

3.6.4.

6. Complete the Benchmark log book.

. 3.5

and turn the

Fig. 3.8

, the boiler will attempt to light.