Maintenance; Notes On Safety For The Maintenance; Maintenance Programme; Maintenance Frequency - Riello RL 190/M Installation, Use And Maintenance Instructions

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
contents 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 gas 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

The operator must use the required equipment
during maintenance.
Combustion
Carry out an analysis of the combustion flue gases. Significant
differences with respect to the previous measurements indicate
the points where more care should be exercised during
maintenance.
If the combustion values measured before starting maintenance
do not comply with applicable Standards or do not indicate
efficient combustion, consult the table below or contact our
Technical Support Service to implement the necessary
adjustments.
EN 267
Theoretical max CO
2
0 % O
2
15.2
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
temperatures.
Air excess
Max. output Min. output
  1.2   1.3
CO % Calibration
2
 = 1.2  = 1.3
12.6 11.5
Maintenance
Before carrying out any maintenance, cleaning or checking
operations:
DANGER
DANGER
Pump
The delivery pressure must be stable at 20 bar.
The depression must be less than 0.45 bar.
Unusual noise must not be evident during pump operation.
If the pressure is unstable, or 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 vacuometer 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.
Servomotor
Release cam 2)(Fig. 31 page 27) from the servomotor, by
pressing and shifting button 3)(Fig. 32 on page 28) to the right.
Manually rotate it backwards and forwards to make sure it moves
smoothly.
Now engage the cam again by shifting the button 2)(Fig. 32 on
page 28) to the left.
Nozzle
It is advisable to replace nozzles once a year during periodical
maintenance.
Do not clean the nozzle openings.
CO
Flexible hoses
Check to make sure that the hoses are still in good condition.
mg/kWh
Fuel tank
 100
Approximately every 5 years, or whenever necessary, suck any
Tab. J
water or other impurities present on the bottom of the tank using
a separate pump.
Burner
Make sure that the screws are well secured.
31 GB
Disconnect the electrical supply from the burner
by means of the system main switch.
Close the fuel shut-off valve.
Wait for the components in contact with heat
sources to cool down completely.
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