Maintenance
35
20051011
Electrode unit
Make sure neither the electrodes nor probe feature marked warp-
ing or oxidation on surfaces. Make sure distances are still in line
with those indicated in this manual, readjusting to the right values
where necessary. Where necessary, remove oxide from the sur-
face of the probe with abrasive paper.
Gas train
Check valve setting and proportionality of operation by analysing
flue gases. Check the valve/manifold compensation pipe.
Gas filter
Change the gas filter when it is dirty.
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases.
Significant differences with respect to the previous measurements
indicate the points where most care should be exercised during
maintenance.
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do not
correspond to a proper combustion, contact the Technical Assis-
tant in order to carry out the necessary adjustments.
Tab. Q
Safety components
The safety components must be replaced according to the limit of
the lifetime cycles indicated in the Tab. R.
The lifetime cycles specified, are not referred to the warranty time
indicated in the delivery and payment conditions.
Tab. R
NOx expected emissions on Natural Gas
(expressed in ppm@3% O
2
)
Sub 30 Sub 20 Sub 9
CO
2
(%) O
2
(%) CO
2
(%) O
2
(%) CO
2
(%) O
2
(%)
8.5~8.75 5.8~5.4 8.0~8.5 6.7~5.8 7.25~7.75 8.0~7.1
Safety component Lifetime cycle
Control box 10 years or 250,000 operating cycles
Flame sensor 10 years or 250,000 operating cycles
Solenoid valves 10 years or 250,000 operating cycles
Pressure switches 10 years or 250,000 operating cycles
Gas pressure regulator 15 years
Servomotors
(electronic cam)
10 years or 250,000 operating cycles
Solenoid oil valves 10 years or 250,000 operating cycles
Oil regulator 10 years or 250,000 operating cycles
Fuel pipes/ connectors
(metallic)
10 years
Hoses 5 years or 30,000 pressure cycles
Fan wheel 10 years or 500,000 startings
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