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6
Maintenance
6.1
Notes on safety for the maintenance
The periodic maintenance is essential for the good operation, safe-
ty, yield and duration of the burner.
It allows you to reduce consumption and polluting emissions and to
keep the product in a reliable state over time.
The maintenance interventions and the calibration
of the burner must only be carried out by qualified,
authorised personnel, in accordance with the con-
tents of this manual and in compliance with the
DANGER
standards and regulations of current laws.
Before carrying out any maintenance, cleaning or checking opera-
tions:
6.2
Maintenance programme
6.2.1
Maintenance frequency
The gas combustion system should be checked at
least once a year by a representative of the manu-
facturer or another specialised technician.
6.2.2
Safety test - with gas ball valve closed
It is fundamental to ensure the correct execution of the electrical
connections between the gas solenoid valves and the burner to
perform safely the commissioning.
For this purpose, after checking that the connections have been
carried out in accordance with the burner's electrical diagrams, an
ignition cycle with closed gas ball valve -dry test- must be per-
formed
1
The manual ball gas valve must be closed
2
The electrical contacts of the burner limit switch need to be
closed
3
Ensures closed the contact of the low gas pressure switch
4
Make a trial for burner ignition.
The start-up cycle must be as follows:
–
Starting the fan for pre-ventilation
–
Performing the gas valve seal control, if provided
–
Completion of pre-ventilation
–
Arrival of the ignition point
–
Power supply of the ignition transformer
–
Electrical Supply of solenoid gas valves.
Since the manual gas ball valve is closed, the burner will not light
up and its control box will go to a safety lockout condition.
The actual electrical supply of the solenoid gas valves can be ver-
ified by inserting a tester. Some valves are equipped with light sig-
nals (or close/open position indicator) that turn on at the same time
as their power supply.
If the electrical supply of the gas valves occurs
at unexpected times, DO NOT OPEN MANUAL
GAS BALL VALVE, SWITCH OFF POWER LINE;
CHECK THE WIRES; CORRECT THE ERRORS
WARNING
AND REPEAT THE COMPLETE TEST.
20051011
Maintenance
Disconnect the electrical supply from the burner by
means of the main system switch.
DANGER
Close the fuel interception tap.
DANGER
Wait for the components in contact with heat sourc-
es to cool down completely.
6.2.3
Checking and cleaning
The operator must use the required equipment dur-
ing maintenance.
Combustion head
Open the burner and make sure that all components of the com-
bustion head are in good condition, not deformed by the high
temperatures, free of impurities from the surroundings and cor-
rectly positioned.
Burner
Check that there are not excess wear or loosen screws.
Clean the outside of the burner.
Fan
Check to make sure that no dust has accumulated inside the fan or
on its blades, as this condition will cause a reduction in the air flow
rate and provoke polluting combustion.
Electrical Wiring
Check that the burner and gas train electrical connections are cor-
rect.
Boiler
Clean the boiler as indicated in its accompanying instructions in or-
der to maintain all the original combustion characteristics intact, es-
pecially the flue gas temperature and combustion chamber
pressure.
Gas leaks
Make sure that there are no gas leaks in the following areas:
- on the meter-burner pipework
- on the mixer/valve connection
- on the burner fastening flange where the seal is fitted.
34
GB
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