Combustion Control (Gas); Safety Components - Riello GAS 3 Installation, Use And Maintenance Instructions

Combustion
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.
7.2.4

Combustion control (gas)

CO
2
It is advisable to adjust the burner with a CO
about 10% (gas con Ncv 8600 kcal/m3). In this way it is avoided
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.
EN 676
Max. output
Theoretical max
CO
GAS
2
0 % O
2
G 20 11.7
G 25 11.5
G 30 14.0
G 31 13.7
20144819
not greater than
2
Air excess
Max. output
  1.2  1.3
CO % Calibration
2
mg/kWh
 = 1.3
 = 1.2
9.7 9
9.5 8.8
11.6 10.7
11.4 10.5
Maintenance
7.2.5

Safety components

The safety components should be replaced at the end of their life
cycle indicated in the following table.
The specified life cycles do not refer to the warranty terms indi-
cated in the delivery or payment conditions.
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)
CO
Oil pipes/ couplings
(metallic)(if present)
Flexible hoses (if present)
Fan impeller
 1000
 1000
 1000
 1000
Tab. K
28 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. L