Maintenance; Notes On Safety For The Maintenance; Maintenance Programme; Maintenance Frequency - Riello RL 42 BLU Instrucciones De Instalación, Montaje Y Funcionamiento

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-
tents of this manual and in compliance with the
DANGER
standards and regulations of current laws.
7.2

Maintenance programme

7.2.1

Maintenance frequency

The combustion system should be checked at least once a year
by a representative of the manufacturer or another specialised
technician.
7.2.2

Checking and cleaning

Pump
The pressure must be stable and at the same level as measured
during the previous check.
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 measure 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.
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.
Filters
Check the following filter boxes (Fig. 26):
• on line 1)
• in the pump 2)
• at the nozzle 3)
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.
20023224
Maintenance
Before carrying out any maintenance, cleaning or checking oper-
ations:
disconnect the electricity supply from the burner
by means of the main switch of the system;
DANGER
close the fuel interception tap.
DANGER
Combustion head
Check to make sure that all the parts of the combustion head are
in good condition, positioned correctly, free of all impurities, and
that no deformation has been caused by operation at high tem-
peratures.
Nozzles
Do not clean the nozzle openings; do not even open them. The
nozzle filters however may be cleaned or replaced as required.
UV Sensor
To extract the UV sensor 1)(Fig. 27) loosen the screws 2) and un-
hook the support 3).
22 GB
D836
D1763
Fig. 26
Fig. 27