Riello Gulliver BS1/M, Installation, Use And Maintenance Instructions

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27
20096985
GB
Start-up, calibration and operation of the burner
6.6 Air pressure switch
Adjust the air pressure switch after performing all other burner
adjustments with the air pressure switch (Fig. 23) set to the start
of the scale.
With the burner operating at maximum output, turn the knob slow-
ly in a clockwise direction until burner lockout.
Then turn the knob anticlockwise to an extent that is around 20%
of the adjusted value and then check that the burner starts up
properly.
If the burner locks out again turn the knob slightly in an anticlock-
wise direction.
6.7 Combustion adjustment
In conformity with Efficiency Directive 92/42/EC the application of
the burner on the boiler, adjustment and testing must be carried
out observing the instruction manual of the boiler, including veri-
fication of the CO and CO
2
concentration in the flue gases, their
temperatures and the average temperature of the water in the
boiler.
It is advisable to set the burner according to the type of gas used
and following the indications in Tab. N.
Tab. N
6.8 Operation sequence of the burner
WARNING
In conformity with the standard, the air pressure
switch must prevent the air pressure falling be-
low 80% of the adjusted value and the CO in the
flue gases exceeding 1% (10,000 ppm).
To check this, insert a combustion analyser in the
flue, slowly reduce the burner air setting (for ex-
ample with a piece of cardboard) and verify that
the burner locks out before the CO value in the
flue gases exceeds 1%.
Fig. 23
D7404
EN 676 Air excess: max. output.
λ ≤
1.2 – min. output
λ ≤
1.3
GAS
Theoretical max
CO2
0 % O2
Setting CO2 %
CO
mg/kWh
NOx
mg/kWh
λ
= 1.2
λ
= 1.3
G 20 11.7 9.7 9.0
≤
100
≤
170
G 25 11.5 9.5 8.8
≤
100
≤
170
G 30 14.0 11.6 10.7
≤
100
≤
230
G 31 13.7 11.4 10.5
≤
100
≤
230
Fig. 24
24s Min. 30s
3s max.
11s 15
÷
25s
D4435
3s 2.5s
11s
Limit thermostat
Motor
Safety thermostat
Transformer
2nd flame
Gas valve
Motor air damper
2
1
0
1st flame
{
opener