34
EN
7.6
Checks and adjustments
7.6.1
Chimney sweeper function
The chimney sweeper function is used by the qualified maintenance
technician to check the gas pressure at the nozzles, detect the
combustion parameters and to measure the combustion efficiency
required by legislation in force.
This function lasts 15 minutes and is activated by proceeding as
follows:
– if the panel (2) has not already been removed, remove the two
screws (1), pull the front panel (2) forwards and release it from
the top by lifting it
1
2
Fig. 41
– 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. 42
– 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. 43
– open the gas valve
– power the boiler by setting the main switch to "ON"
ON
Fig. 44
– press the button
y
for at least 1 second until "SUMMER"
mode
l
has been selected
– press and hold down the buttons
<
and
>
at the same time for
approximately 10 seconds until the message “Hi” appears on the
display together with the flashing symbols
l
and
n
–
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
l
and
n
