Maintenance; Notes On Safety For The Maintenance; Maintenance Programme; Maintenance Frequency - Riello DB 12 LM C10 Installation, Use And Maintenance Instructions

6

Maintenance

6.1

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-
tents of this manual and in compliance with the
DANGER
standards and regulations of current laws.
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 man-
ufacturer or another specialised technician.
6.2.2

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.
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.
Burner
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.
Boiler
Clean the boiler as indicated in its accompanying instructions, es-
pecially to maintain all the original combustion characteristics.
Maintenance
Before carrying out any maintenance, cleaning or checking oper-
ations:
Turn off the burner's power supply using 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 sensor
Minimum current for correct working is 70 µA.
If the value is lower, it could be due to:
– Exhausted sensor;
– Low voltage (lower than 187 V);
– Bad regulation of the burner.
In order to measure the current, use a 30 µA d.c. microammeter
connected in series to the sensor, as in the diagram, with a ca-
pacitor of 100 µF - 1V d.c. in parallel with the instrument (Fig. 30).
D1143
27 GB
Fig. 30
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