29
20040559
GB
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.
Before carrying out any maintenance, cleaning or checking oper-
ations:
7.2
Maintenance programme
7.2.1
Maintenance frequency
7.2.2
Checking and cleaning
Combustion
Carry out an analysis of the combustion discharge gases.
Significant differences with respect to the previous check indicate
the points where more care should be exercised during mainte-
nance.
Gas leaks
Make sure that there are no gas leaks on the pipes between the
gas meter and the burner.
Gas filter
Replace the gas filter when it is dirty.
Combustion head
Open the burner and make sure that all components of the
combustion head are in good condition, not deformed by the
high temperatures, free of impurities from the surroundings
and correctly positioned.
Flame inspection window
Clean the glass of the flame inspection window (Fig. 35).
Flame presence check
The burner is fitted with an ionisation system to check that a
flame is present (Fig. 36). The minimum current for control box
operation is 6 µA.
The burner provides a much higher current, so controls are not
normally required. However, if it is necessary to measure the ion-
isation current, disconnect the plug-socket 23)(Fig. 5 on page 11)
on the ionisation probe cable and insert a direct current microam-
meter with a base scale of 100 µA. Carefully check the polarities!
Servomotor
Release cam 4)(Fig. 28 on page 24) from the servomotor, ro-
tating notch 2)(Fig. 28 on page 24) by 90° and manually check
that it rotates smoothly back and forth.
Connect the cam again 4)(Fig. 28 on page 24).
7
Maintenance
DANGER
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
standards and regulations of current laws.
DANGER
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Close the fuel interception tap.
Wait for the components in contact with heat
sources to cool down completely.
The gas combustion system should be checked at
least once a year by a representative of the man-
ufacturer or another specialised technician.
The operator must use the required equipment
during maintenance.
D484
Fig. 35
RMG/M
10
D3843
µA
Fig. 36
