Immergas MAGIS COMBO 4 V2 Instructions And Recommendations page 73

3.8 GAS VALVE
The gas valve (Fig. 61) is equipped with functioning status signal
LED (5), the LEDs are under the transparent protection cover (4).
Colour
Off Gas valve not powered
Green Gas valve powered and working
Red Gas valve powered and not working
5
Key (Fig. 61):
1 - Gas valve inlet pressure point
2 - Gas valve outlet pressure point
3 - Off/Set adjustment screw
4 - Transparent protection cover
5 - Gas valve status signal display
12 - Outlet gas flow rate adjuster
3.9 CONVERTING THE HEAT GENERATOR
TO OTHER TYPES OF GAS
The gas conversion operation must be carried out by an
authorised company (e.g. Authorised Technical Assi-
stance Service).
If the appliance needs to be converted to a different gas type to that
specified on the data plate, request the relative conversion kit for
quick and easy conversion.
To convert to another type of gas the following operations are re-
quired:
- disconnect power to the appliance;
- replace the nozzle positioned between the gas pipe and the air/
gas mixing sleeve, taking care to remove the voltage from the
appliance during this operation;
- re-power the appliance;
- calibrate fan speed (Parag. 3.10);
- adjust the correct air/gas ratio (Parag. 3.11);
• seal the gas flow rate regulation devices (if settings are modi-
fied);
- after completing the conversion, apply the sticker, contained in
the conversion kit, near the data nameplate. Using an indelible
marker pen, delete the data relative to the old type of gas.
Status
P1
4
P3
2
12
3
1
These adjustments must be made with reference to the type of gas
used, following that given in the table in the indoor unit manual.
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 Centre).
3.10 FAN SPEED CALIBRATION
61
Verification and calibration are necessary, in the case of
transformation to other types of gas, in the extraordi-
nary maintenance phase with replacement of the PCB,
air/gas circuit components or in the case of installations
with flue extraction systems, with horizontal concentric
pipe measuring more than 1 metre.
The indoor unit heat output is correlated to the length of the air
intake and flue exhaust pipes.
This decreases with the increase of pipe length.
The indoor unit leaves the factory adjusted for minimum pipe
length (1m). It is therefore necessary, especially in the case of ma-
ximum pipe extension, to check the Δp gas values after at least 5
minutes of the burner operating at nominal heat output, when the
temperatures of the intake air and exhaust flue gas have stabilised.
Adjust the nominal and minimum output in the domestic hot
water and central heating modes according to the values in the
table in the indoor unit manual using the differential manometers
connected to the Δp gas pressure points (Det. 9-Fig. 42).
Enter the configurations menu and regulate the following para-
meters (Parag. 3.12);
- DHW minimum no. of fan revs "S 00";
- DHW maximum no. of fan revs "S 01";
- delete ignition stage "S 02".
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