please approach the authorised tech-
nical staff.
BURNER RESTART
In case that ignition or operation faults
occur, the main burner “locks out” and
the red lamp lights up on the control
panel. Press the “RESET” button to
restart the ignition conditions until the
flame lights up (fig. 23). This operation
can be repeated 2-3 times at maxi-
mum and in case of failure contact the
authorised technical staff.
ATTENTION: Make sure that there is
fuel in the tank and that the taps are
open. After each fill up of the tank it
is advisable to interrupt the opera-
tion of the burner for about one hour.
TURNING OFF BOILER
It is sufficient to press the main switch
to turn off the boiler (fig. 19).
Close both the gas-feed pipe tap and
the water tap if the boiler remains
inoperative for a long period.
SYSTEM FILLING
Check periodically that the hydrometer
has pressure values at a switched-off
system of 1 - 1.2 bar.
If the orange water pressure gauge
light turns on inhibiting boiler opera-
tions, restore operations by turning
t he suppl y t ap count er -clockwise.
After the operation check that the tap
is properly closed (fig. 24).
Should the pressure exceed the fore-
seen limit, discharge the superfluous
amount by operating on the vent knob
of any radiator.
CLEANING AND MAINTENANCE
At the end of each heating season, it is
essential to have the boiler thoroughly
checked and cleaned out.
Preventive maintenance and checking
of the efficient operation of the equip-
ment and safety devices must be car-
ried out exclusively by the authorised
technical staff.
82
RESET
TWICE
ONLY
Fig. 23
Fig. 22
0
4
1
3
2
bar
Fig. 24
RESET
BUTTON
OPEN
ORANGE LIGHT ON
RED WARNING LIGHT ON
Summary of Contents for DUETTO 20 OF
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