67
INS
TALLER
U
SER
M
AINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
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AT
A
3.7 CONVERTING THE APPLIANCE TO OTHER TYPES OF GAS
The gas conversion operation must be carried out by an authorised company (e.g. Authorised After-Sales Centre).
To convert to another type of gas the following operations are required:
- Select, via programming menu “G”, the type of gas by selecting “nG” for methane gas and “LG” for LPG gas (Par. 3.13).
- Alternatively, by accessing the appropriate sub-menu, it is possible to choose "AP" propane-air gas operation.
- Carry out complete calibration (Par. 3.9); during the procedure check and, if necessary, correct the CO
2
value.
- Upon completing the conversion, apply the sticker regarding the modified gas content onto the data nameplate in the connection box.
These adjustments must be made with reference to the type of gas used, following the indications given in the table (Par. 4.2).
Checks following conversion to another type of gas.
After having made sure that the conversion is complete and that the calibration has been successful, you must make sure that:
- there is no flame in the combustion chamber;
- the burner flame is not too high or low and that it is stable (does not detach from burner);
The pressure testers used for calibration should be perfectly closed and there should be no
leaks from the gas circuit.
Maintenance operations must be carried out by an authorised company (e.g. Authorised After-Sales Technical Assistance Ser-
vice).
1
4
3
2
5
41
Key (Fig. 41):
1
- Gas valve outlet pressure point
2 - Coil
3
- Wiring connector
4
- Gas valve inlet pressure point
5
- P. Ref. (Reference pressure)
