Combustion Control (Gas); Safety Components - Riello 20194153 Installation, Use And Maintenance Instructions

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.
Flame inspection window
Clean the glass of the flame inspection window.
6.2.4

Combustion control (gas)

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 more 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 As-
sistance Centre in order to carry out the necessary adjustments.
EN 676
Max. output
Theoretical
max CO
GAS
2
0 % O
2
G 20 11.7
G 25 11.5
CO
2
It is advisable to adjust the burner with a CO
about 10% (gas con Ncv 8600 kcal/m
that a small decalibration (for example a variation in the tension)
could cause a combustion with an air defect and with the subse-
quent formation of CO.
CO
It should not exceed 100 mg/kWh.
20194185
D484
Air excess
Max. output
 1.2  1.3
CO % Calibration
2
mg/kWh
 = 1.3
 = 1.2
9.7 9
9.5 8.8
not greater than
2
3
). In this way it is avoided
Maintenance
6.2.5

Safety components

The safety components should be replaced at the end of their life
cycle indicated in Tab. J. The specified life cycles do not refer to
the warranty terms indicated in the delivery or payment condi-
tions.
Safety component
Flame control
Flame sensor
Gas valves (solenoid)
Pressure switches
Pressure adjuster
Servomotor
(electronic cam) (if present)
Oil valve (solenoid)
(if present)
Oil regulator (if present)
Oil pipes/ couplings
Fig. 39
(metallic) (if present)
Hoses (if present)
Fan impeller
CO
 100
 100
Tab. I
32 GB
Life cycle
10 years or 250.000
operation cycles
10 years or 250.000
operation cycles
10 years or 250.000
operation cycles
10 years or 250.000
operation cycles
15 years
10 years or 250.000
operation cycles
10 years or 250.000
operation cycles
10 years or 250.000
operation cycles
10 years
5 years or 30.000
pressurised cycles
10 years or 500.000 start-ups
Tab. J