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3.7.2
Adjusting gas pressure at the nozzles
m
CAUTION
Considering that:
– the front panel (2) has already been removed and
the point (6) is connected to the pressure gauge
– the main system switch must be set to "ON"
– the gas supply must be open
– there must be no current requests for heat
("Summer" mode
"Winter"
n
with air thermostats open)
– the adjustments described below must be carried out
in sequence.
Adjusting maximum gas pressure:
– turn the domestic hot water knob as far as it will go
– press and hold down the buttons
for approximately 6 seconds until the message "MA" appears
on the display alternating with "nu"
– open one or more than one hot water tap
– the boiler will start up and the message "P01" will appear on
the display (Adjusting maximum gas pressure)
– press the buttons
>
or
<
until the pressure value indicated in
the table appears on the pressure gauge
– once the value indicated in the table has been reached, press
the button
s
for approximately 2 seconds to confirm the value
which will then flash once.
Adjusting minimum gas pressure:
– press the button
o
twice, the message "P00" will appear on
the display
– press the buttons
>
or
<
until the pressure value indicated in
the table appears on the pressure gauge
– once the value indicated in the table has been reached, press
the button
s
for approximately 2 seconds to confirm the value
which will then flash once.
– press and hold down the buttons
approximately 6 seconds until the water delivery temperature
appears on the display and the boiler shuts down/starts up.
– close the valves which were opened previously.
l
with hot water valve closed or
r
o
and
s
at the same time
o
and
s
at the same time for
3.8
Gas conversion
models can be converted from operation with G20
Brava One BF
to operation with G30/G31 by installing the "Nozzle kit for G30/
G31 - code 5144716 (for Brava One 25 BF ) and code 5144713 for
Brava One 30 BF
) to be ordered separately from the boiler.
m
CAUTION
The maintenance interventions described must ONLY
be carried out the professionally qualified personnel.
a
DANGER
Before carrying out any interventions described:
– set the main system switch to "OFF"
– close the gas valve
– make sure that no hot parts inside the appliance are
touched.
OFF
3.8.1
Preliminary operations
To carry out the conversion:
– remove the two screws (1), pull the front panel (2) forwards
and release it from the top by lifting it
2
– remove the four screws (3) and remove the front panel (4)
from the sealed chamber
Fig. 37
1
Fig. 38
85
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