47
47
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.
8
CONVERTING THE BOILER TO OTHER
TYPES OF GAS
.
Th
e gas conversion operation must be carried out by
an authorised company (e.g. Authorised Technical
After-Sales Service).
To convert to another type of gas the following oper-
ations are required:
- Select, via programming menu “G”, the type of gas by
selecting “nG” for methane gas and “LG” for LPG gas.
(Par. 3.15).
- Carry out complete calibration (Par. 3.11); during the pro-
cedure 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 con-
nection box.
Th
ese adjustments must be made with reference to the type of
gas used, following that given in the table (Par. 4.1).
3.9 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
fl
ame in the combustion chamber;
- the burner
fl
ame is not too high or low and that it is stable (does
not detach from burner);
- the pressure testers used for calibration are perfectly closed and
there are no leaks from the gas circuit.
Maintenance operations must be carried out by an
authorised company (e.g. Authorised After-Sales
Technical Assistance Service).
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