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7
Maintenance
7.1
Notes on safety for the maintenance
The periodic maintenance is essential for the good operation,
safety, 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-
DANGER
tents of this manual and in compliance with the
standards and regulations of current laws.
Before carrying out any maintenance, cleaning or checking oper-
ations:
7.2
Maintenance programme
7.2.1
Maintenance frequency
The gas combustion system should be checked at
least once a year by a representative of the man-
ufacturer or another specialised technician.
7.2.2
Checking and cleaning
The operator must use the required equipment
during maintenance.
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases.
Significant differences with respect to the previous measure-
ments indicate the points where most care should be exercised
during maintenance.
Gas leaks
Make sure that there are no gas leaks on the pipe between the
gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Combustion head
Open the burner and make sure that all the components of the
combustion head are:
–
undamaged;
–
not deformed due to high temperature;
–
free of ambient dirt or dust;
–
free of rusted materials;
–
correctly positioned;.
Check the gas outlet holes for the ignition phase (in the distributor
of the combustion head) are free of impurities or rust. If in doubt,
disassemble the elbow 5)(Fig. 38).
Maintenance
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Turn off the fuel interception tap.
DANGER
Wait for the components in contact with heat
sources to cool down completely.
Flame inspection window
Clean the glass of the flame inspection window.
Servomotor
Release the cam 4)(Fig. 30, page 26) from the servomotor, by
pressing and shifting the button 3)(Fig. 31, page 27) to the right.
Manually rotate it backwards and forwards to make sure it moves
smoothly.
Now engage the cam again by shifting the button 2)(Fig. 30,
page 26) to the left.
Burner
Check for excess wear or loose screws in the mechanisms con-
trolling the air damper and the gas butterfly valve. Also make sure
that the screws securing the electrical leads in the burner connec-
tions are fully tightened.
Clean the outside of the burner, taking special care with the artic-
ulated couplings and the cam 4)(Fig. 30, page 26).
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.
31
GB
D709
Fig. 37
20054100
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