84
EN
4.3.4
Final operations
After having cleaned the heat exchanger and the burner:
– remove any carbon residue using a vacuum cleaner
– check that the gasket and the insulation of the front panel (4)
of the combustion chamber are integral. If this is not the case
then replace it
– refit the panel (4) secure it with fastening screws.
3 4
5
6
Fig. 46
4.4
Checks
4.4.1
Checking the smoke duct
It is recommended that the user checks that the smoke outlet
duct is 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
section
Expansion 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
parameters as indicated in the table.
Type
No.
Description
Setting
tS
0.1
Index showing boiler power in kW
0 = 24
0
tS
0.2
Hydraulic configuration
0 = rapid
1 = storage tank with thermostat or
heating only
2 = hot water tank with sensor
3 = two programmer
4=instant with solar power input
0
tS
0.3
Gas Type Configuration
0 = G20; 1 = G31
0 or 1
tS
0.4
Combustion configuration
0 = sealed chamber with combustion
control
1 = open chamber with smoke
thermostat
2 = low NOx
1
To enter "
Parameter setting and display
"refer to the indications
provided in the specific section.
Once the parameters in the table have been set, you must carry
out the "
Automatic calibration procedure
".
If the
gas valve
and/or the
ignition/detection electrode
, are
replaced, the user must still carry out the entire phase of "
Automatic calibration procedure
" described in the specific
section.
4.6
Possible faults and solutions
LIST OF MALFUNCTION/FAULT ALARMS
Type
No.
Fault
Solution
AL
01
Smoke thermostat
- Check the smoke outlet
duct
- Check the electrical
connection
- Replace thermostat
AL
02
Low water pressure in
system
- Restore pressure
- Check for any leaks in
the system
AL
04
Domestic hot water
sensor fault
- Check connections
- Replace the sensor
AL
05
Delivery sensor fault
- Check connections
- Replace the sensor
AL
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
AL
07
Sensor or safety
thermostat intervenes
- Check the sensor or
thermostat connections
- Deaerate the system
- Check the bleed valve
- Replace the sensor or
the thermostat
- Check that the pump
impeller is not blocked
AL
08
Fault in the flame
detection circuit
- 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
