Ariston A/23 MFFI Manual De Usuario

22

B023

The boiler can be converted to use either methane (natural) gas (G20) or
LPG (G30 - G31) by an Authorised Service Centre.
The operations that must be performed are the following:
1. Replace the jets on the main burner (see table in section 4);
2. Adjust the maximum and minimum thermal capacity values for the boiler

(see table in section 4);

3. Replace the gas rating plate;
4. Adjust the maximum thermal power setting;

5. Adjust the soft-light feature;
6. Adjust the ignition delay feature for the heating system (can be set from

0 to 2 mins.).

Recommended Soft-Light Pressure

(mbar)

5-5.5

17 - 18

18 - 19

It is recommended that the following checks be made on the boiler at
least once a year:
1 - Check the seals for the water connections; replacement of any faulty seals.
2 - Check the gas seals; replacement of any faulty gas seals.
3 - Visual check of the entire unit.
4 - Visual check of the combustion process and cleaning of the burners if

needed.

5 - If called for by check no. 3, dismantling and cleaning of the combustion

chamber.

6 - If called for by check no. 4, dismantling and cleaning of the injectors.
7 - Visual check of the primary  heat exchanger:

- check for overheating in the blade assembly;
-  clean the exhaust fan if needed.

8 - Adjustment of the flow rate of the gas: flow rate for lighting, partial load and 

full load.

9 - Check of the heating safety systems:

- safety device for maximum temperature;
- safety device for maximum pressure.

10 - Check of the gas safety systems:

- safety device for lack of gas or flame (detection electrode);
- safety device for gas cock.

11 - Check of the electrical connection (make sure it complies with the

instructions in the manual).

12 - Check of domestic hot water production efficiency (delivery rate and tem-

perature)

13 - Check of the general performance of the unit.
14 - General check of the discharge/ventilation of the combustion by-

products.