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RESERVED FOR INSTALLATION PERSONNEL
Instructions for conversion of the fuel gas from the original settings: from Natural
gas (G20) to liquefi ed gas LPG (G30-G31) with Gas valve.
To adapt the water heater to a type of
gas diff ering from that set originally,
proceed as follows as illustrated in the
image sequence. The nozzle hole sizes
(mm) are given in the following table.
Don't put anything among the nuzzle and
the inlet of Venturi pipe.
TIPO DI GAS
Rated inlet pressure [mbar]
Burner pressure [mbar]
Main burner [mm]
Baffl e
Pilot burner injector
1
9
10
12
11
6
Quantity
2
1
Quantity
1
4
9
13
A
10
2
5
3
IMPORTANT!
TO ADAPT THE WATER HEATER WITH
A GAS DIFFERENT FROM CALIBRA-
TION ONE YOU MUST PROCEED TO
CHANGE THE NOZZLES.
IT IS ADVISABLE TO EXECUTE THE
NOZZLES CHANGE BEFORE PRODUCT
INSTALLATION TO AVOID DISASSEM-
BLING THE GAS GROUP.
Natural gas (methane)
G20
G25
20
18
21,6
2,9
3,4
4,5
27
1.
2. Baffl e
3. Burner air guide
8
4. Downstream pressure plug
C
5. Main injector
B
6. Primary air limiter
12
11
7.
8. Upstream pressure plug
16
9. Fume protection device fi tting
10
15
10. Thermocouple
15
11. Main burner pipe
12. Pilot fl ame pipe
DETAIL OF BAFFLE:
13. Baffl e
DETAIL OF PILOT FLAME
17
7
ASSEMBLY:
14. Pilot fl ame pipe
15
15
15. Thermocouple
16
16. Pilot burner injector
17. Burner fi xing screw
14
18. Ignition electrode
Liquid gas
G30
25
29
27,9
diameter (mm)
1,9
3
marking
32
22
Gas valve
Pilot fl ame assembly
GB
G31
37
34,9
55
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