Immergas 3.028358, Instructions And Recommendations

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56
INS
TALLER
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SER
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TECHNI
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3.7 CONVERTING THE BOILER TO OTHER
TYPES OF GAS.
The gas conversion operation must be carried out by an
authorised company (e.g. Authorised After-Sales Cen-
tre).
To convert to another type of gas the following operations are re-
quired:
- 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 pos-
sible 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 connec-
tion 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 au-
thorised company (e.g. Authorised After-Sales Techni-
cal Assistance Service).
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.
3.8 CALIBRATION TYPE INVOLVING THE
REPLACEMENT OF A COMPONENT.
When performing extraordinary maintenance on the boiler, in-
volving the replacement of a component, such as the P.C.B. or
components in the air, gas and flame control circuits, the boiler
will need to be calibrated.
Select the type of calibration to be carried out according to the ta-
ble below.
Component
replaced
Type of calibration required
Gas valve Quick calibration
Fan Quick calibration
Burner Complete calibration with CO
2
check
Ignition / detection
electrode
Complete calibration with CO
2
check
P.C.B.
Restore the parameters as described in
Par. 3.13 P.C.B. programming
Complete calibration with CO
2
check