Riello 1311 T2, Modulating Operation, Page: 28 / 60

20040170
26
GB
Installation
Example RLS 1000/EV C13 with natural gas G20:
Operation at maximum modulating output
Gas pressure at test point 1)(Fig. 26)
= 44.2 mbar
Pressure in combustion chamber = 5 mbar
44.2 - 5 = 39.2 mbar
A pressure of 39.2 mbar, column 1, corresponds in Tab. I to an
output of 8000 kW.
This value serves as a rough guide; the effective output must be
measured at the gas meter.
To calculate the required gas pressure at test point 1) (Fig. 26),
set the maximum modulating output required from the burner op-
eration:
–
find the nearest output value in the table Tab. I for the burner
in question.
– read, on the right (column 1), the pressure at the test point 1)
(Fig. 26).
– Add this value to the estimated pressure in the combustion
chamber.
Example RLS 1000/EV C13 with natural gas G20:
Operation at maximum modulating output
Gas pressure at an output of 8000 kW
= 39.2 mbar
Pressure in combustion chamber = 5 mbar
39.2 + 5 = 44.2 mbar
pressure required at test point 1)(Fig. 26).
5.13.5 Pilot - gas train connection
The burner is fitted with a dedicated gas train that is fixed to the
pipe coupling.

It should be connected to the main train downstream the fil-
ter or the pressure regulator (depending on configuration).
5.13.6 Ignition pilot burner
For proper operation, adjust gas pressure (measured at pressure
test point 1) (Fig. 27) as follows:
Tab. J
In the case of ignition problems check:

correct positioning of the ignition electrode;

the gas pressure, according to indications.
+
WARNING
Supply pressure 68 ÷ 500 mbar
Model Gas mbar Sm
3
/h
RLS 1000/E C13 G20 1.5 12.3
G31 1.4 3.2
RLS 1200/E C13 G20 40 14.3
G31 30 7.1
WARNING
Check pilot flame stability before starting up the
main burner.
1
2
Fig. 26
D11804
Fig. 27
D11317