90
EN
– remove the four screws (3) and remove the front panel (4)
from the combustion chamber (6) working carefully so as
not to damage the gasket or the panel insulation
5
6
7
8
Fig. 48
– if there is any dirt on the heat exchanger (7) fins, protect the
burner elements (8) covering them with a sheet of newspa-
per or a cloth and brush the heat exchanger (7) clean.
4.3.2 Cleaning the burner
The burner does not require any particular maintenance sim-
ply dust it with a soft brush
4.3.3 Final operations
After having cleaned the heat exchanger and the burner:
– remove any carbon residue using a vacuum cleaner
– check that the end of the electrode (8) is IN THE MIDDLE of
the burner assembly (*)
– check that the gasket and the insulation of the front panel
(6) of the combustion chamber and the gasket (13) of the
front panel (4) of the sealed chamber are all integral. If they
are not, replace them
– refit the panels (6) and (4) securing them with fastening
screws.
m
CAUTION (*)
The position of the electrode is essential for the correct
detection of current ionization.
3
4
13
Fig. 49
4.4
Checks
4.4.1 Checking the smoke duct
It is recommended that the user checks that the combustion
air inlet duct and smoke outlet duct are integral and airtight.
4.4.2 Checking the expansion vessel pressure
It is recommended that the expansion vessel on the water side
is drained and that the prefilling pressure is not less than 1
bar
. If this is not the case, pressurize it to the correct value
(see sectionExpansion vessel".
Once the checks described above have been completed:
– refill the boiler as described in section "REFILL operations"
– refit the front panel securing it with the two screws which
were removed previously
– start the boiler up and carry out a smoke analysis and/or
measure the combustion efficiency.
4.5
Unscheduled maintenance
If replacing the electronic board, the user MUST set the param-
eters as indicated in the table.
Type
No.
Description
Setting for
Brava
Slim BF
25
30
PAR
01
Index showing boiler power
in kW
0 =24; 1 = 30; 2 = 40
0
1
PAR
02
Hydraulic configuration
0 = rapid
1 = hot water tank with ther-
mostat
2 = hot water tank with sensor
3 = two programmer
0
PAR
03
Gas Type Configuration
0 = G20; 1 = LPG
0 or 1
PAR
04
Combustion configuration
0 = sealed chamber with com-
bustion control
1 = open chamber with smoke
thermostat
0
To enter "Parameter setting and display"refer to the indica-
tions provided in the relevant section.
Once the parameters in the table have been set, you must car-
ry out the "Automatic calibration procedure".
4.6
Possible faults and solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
ALL
02
Low water pressure in
system
- Restore pressure
- Check for any leaks in
the system
ALL
04
Domestic hot water
sensor fault
- Check connections
- Replace the sensor
ALL
05
Delivery sensor fault
- Check connections
- Replace the sensor
ALL
06
No flame detection
- Check the integrity
of the electrode and
check that it is not
grounded
- Check gas availability
and pressure
- Check the integrity of
the gas valve and the
card
Summary of Contents for Brava Slim 25 BF
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