78
EN
– remove the screws (3) securing the control panel (4)
– move the panel (4) upwards (a) but keeping it in the side
guides (5) to the end of travel
– bring it forwards and down (b) until it is horizontal
3
a
b
5
4
Fig. 32
– close the gas valve
– loosen the "nozzle pressure" point (6) and the screw of the
"supply pressure" point (7) and connect each one to a pressure
gauge
6
7
Fig. 33
– open the gas valve
– power the boiler by setting the main switch to "ON"
ON
Fig. 34
– press the button
s
until "SUMMER" mode
l
has been
selected
– press the buttons
o
and
>
at the same time for approximately
10 seconds until the message flashes on the display
alternating with the temperature of the delivery sensor and
the flashing symbols
o
and
>
–
open one or more than one hot water tap
– press the button
>
to make the boiler operate at maximum
power
“Hi”
and check that the gas pressure values on the
pressure gauges correspond to those indicated in the table
below
– press the button
<
to make the boiler operate at minimum
power
“Lo”
and check that the gas pressure values on the
pressure gauges correspond to those indicated in the table
below. The message “Lo” will appear on the display together
with the flashing symbols (sun) and (snow)
– press the button
>
once again to make the boiler operate at
maximum power. If the gas pressure values are correct it is
possible to determine the combustion data and take a reading
of the combustion efficiency as provided for by legislation in
force
– press the button
s
to exit the "Chimney sweep Procedure”.
The boiler water delivery temperature will appear on the
display
– close the taps opened previously and check that the appliance
shuts down
– disconnect the pressure gauges, carefully close the pressure
points (6) and (7), put the control panel back to the original
position and refit the front panel (2).
Gas supply pressure
Type of gas
G20
G30
G31
Pressure (mbar)
20
28-30
37
Pressure at nozzles
Type of gas
G20
G30
G31
Pressure
at nozzles
(mbar)
at Max heat output
9,8 - 10,2
27,8 -
28,2
35,8 -
36,2
at min heat output
1,9 - 2,2
4,9 - 5,2
6,3 - 6,6
If the gas pressure values are different from the values indicated
in the table, adjust the gas nozzle pressure as described in the
section below.
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
l
with hot water valve closed or
"Winter"
n
with air thermostats open)
–
the adjustments described below must be carried out
in sequence.
