MAINTENANCE INSTRUCTIONS
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5.7 Converting the boiler to a different gas type
The conversion of a boiler from burning natural gas to LPG, or vice versa, must be carried out
exclusively by professionally qualified personnel, registered in accordance with current legislation.
Check that the gas supply pipe is suitable for the new fuel type.
Conversion is performed as follows (see fig.1):
1. turn off the main power switch;
2. close the gas cock;
3. substitute the jets on the main burner as follows: undo the gas pipe (5 fig.1) from the burner manifold using a
size 24 spanner, separate the burner manifold (6) from the burner ramps (7) by undoing the 2 screw (11);
4. fit new jets to ‘8’ (see ‘Technical data tables 5.4’ , Main burner jets) the burner suitable for the type of gas the
boiler will run on using a no. 7 spanner. The jets must be fitted with new gaskets;
5. reassemble the entire burner unit. Use the soapy water method to check for gas leaks each time gas
connections are dismantled and reassembled;
6. select the new gas type by changing parameter P01 (see ‘Parameters table’ 5.1);
7. to convert the appliance from L.P.G. to Natural Gas proceed with the min. and max. gas pressure adjustment
(see ‘Gas Valve adjustment’ 5.3);
8. to convert the appliance from Natural Gas to L.P.G. proceed as follows: remove the modulator plastic cap A
(fig. 1) and screw in the nut 12 using a 10mm. spanner; measure the gas valve inlet pressure ‘3’ with burner
ON; adjust the system pressure regulator according to the ‘Gas Data’ Table 5.4 (Nominal Supply pressure). In
case of G 30 – G31 mix, adjust the inlet pressure according to G31 pressure data. To adjust the minimum
mechanical gas pressure see ‘Gas Valve adjustment’ paragraph 5.3;
9. When converting the boiler to work with a different type of gas, remove the existing data plate and replace it
with the new one supplied in the conversion kit.
7
11
8
6
5
9
10
7
6
8
2
5
3
4
1
KEY:
1. GAS VALVE
2. MODULATOR
3. INLET PRESSURE POINT
4. OUTLET PRESSURE POINT
5. GAS PIPE
6. BURNER MANIFOLD
7. 15 RAMPS GAS BURNER
8. INJECTORS
9. IGNITION ELECTRODES
10. FLAME IONISATION ELECTRODES
11. MANIFOLD FIXING SCREWS
12. MODULATOR NUT
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