60
GB
RESERVED FOR THE INSTALLER
Instructions for adjustment to functioning with gas
Diff erent to that of calibration
Heaters in category II2H+3+ are normally
adjusted for operation with Methane gas
G20 and can be adapted for use with liquid
gas G30 and G31.
GAS UNIT ACCESSORIES
(fi gures 16 et 17)
1. protection plug for the pressure adjustment
screw,
3. pressure adjustment screw
4. gas inlet fi tting G½,
5. valve-burner connection,
6. fl ame detector electrode,
7. safety thermostat,
8. temperature control thermostat,
9. nozzle,
10. electronic control unit,
11. control panel,
12. gas burner,
13. ignition electrode..
NOZZLE REPLACEMENT
To adapt the water heater to a type of gas
diff ering from the pre-set one, you must re-
place the burner nozzle.
WARNING: the new nozzle, if not supplied
with the heater, must be ordered from the
manufacturer as an original accessory and
must not for any reason have any other
origin
The operation can be carried out without di-
smantling the gas control unit, but simply by
(fi gure 16):
• unscrewing the four fastening screws of
the control panel.
• unscrewing the burner nozzle (9).
• replacing the nozzle with the nozzle for the
new type of gas, diff ering from the pre-set
one.
16
Do not clean the water heater or carry out any maintenance without fi rst switching the
heater off , interrupting the electric supply and turning off the gas valve. Operation of the
water heater is absolutely prohibited when the protection covers of electric parts are
removed or the safety devices are excluded.
17
2
3
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