Maintenance; Notes On Safety For The Maintenance; Maintenance Programme - Riello G490 MXK 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-
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:
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
Check that there are not excess wear or loosen screws.
Clean the outside of the burner.
Clean and grease the adjustable profile of the cams.
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.
20113083
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
sources to cool down completely.
Ionisation current (Fig. 20)
The minimum current necessary for the control box operation is
5 µA.
The burner normally supplies a higher current value, so that no
check is needed.
Anyway, if you want to measure the ionisation current, you need
to open the connector (CN1) fitted on the red wire and insert a mi-
croammeter.
Control box
D5006
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially the flue gas temperature and combustion cham-
ber pressure.
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.
20 GB
Connector
Probe
Fig. 20