27
20098582
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
Install a pressure gauge and a vacuum meter on the pump, then
start the burner and check the following:
Pump
The pressure must be stable and at the same level as measured
during the previous check (between 10 and 14 bar).
The depression must be less than 0.45 bar. Values different from
those measured previously may be due to a different level of fuel
in the tank.
Unusual noise must not be evident during pump operation.
If the pressure is found to be unstable or if the pump runs noisily,
the flexible hose must be detached from the line filter and the fuel
must be sucked from a tank located near the burner. This meas-
ure permits the cause of the anomaly to be traced to either the
suction piping or the pump.
If the pump is found to be responsible, check to make sure that
the filter is not dirty. The vacuum meter is installed upstream from
the filter and consequently will not indicate whether the filter is
clogged or not.
Contrarily, if the problem lies in the suction line, check to make
sure that the filter is clean and that air is not entering the piping.
Filters (page 27)
Check the following filter boxes:
- on line 1) - in the pump 2) - at the nozzle 3), and clean or replace
as required.
If rust or other impurities are observed inside the pump, use a
separate pump to lift any water and other impurities that may
have deposited on the bottom of the tank.
Then clean the insides of the pump and the cover sealing sur-
face.
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.
Nozzle
It is advisable to replace nozzles once a year during periodical
maintenance. Do not clean the nozzle openings.
The nozzle filters however may be cleaned or replaced as re-
quired.
After changing the nozzle, the combustion must be checked.
Flexible hoses
Check to make sure that the flexible hoses are still in good con-
dition and that they are not crushed or otherwise deformed.
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
Turn off 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.
Fig. 27
D384