Start-Up, Calibration And Operation Of The Burner; Notes On Safety For The First Start-Up; Adjustments Prior To Ignition; Combustion Adjustment - Riello 40 FS8 Installation, Use And Maintenance Instructions

6

Start-up, calibration and operation of the burner

6.1

Notes on safety for the first start-up

The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
6.2

Adjustments prior to ignition

 Check the adjustment of the head as shown in page 15.
 Check that the air damper has been correctly adjusted.
 Slowly open the manual valves situated upstream from the
gas train.
 Adjust the air pressure switch (Fig. 18) to the start of the
scale.
 Purge the air from the gas line.
6.3

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 CO2 concentration in the flue gases, their
EN 676
Theoretical max
GAS
G 20
G 25
G 30
G 31
6.4

Air pressure switch

Adjust the air pressure switch (Fig. 18) after performing all other
burner adjustments with the air pressure switch set to the start of
the scale.
With the burner function at the required output, turn the knob
slowly 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.
In conformity with the standard, the air pressure
switch must prevent the air pressure falling below
80% of the adjusted value and the CO in the flue
gases exceeding 1% (10,000 ppm).
WARNING
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%.
20063692
Start-up, calibration and operation of the burner
CO2
 = 1.2
0 % O2
11.7 9.7
11.5 9.5
14.0 11.6
13.7 11.4
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
We recommend using a plastic tube routed outside the build-
ing and to purge air until gas is smelt.
Before starting up the burner, it is good practice to
adjust the gas train so that ignition takes place in
conditions of maximum safety, i.e. with gas deliv-
ery at the minimum.
CAUTION
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. D.
Air excess: max. output.   1.2 – min. output   1.3
Setting CO2 %
 = 1.3
9.0
8.8
10.7
10.5
20
GB
CO
mg/kWh mg/kWh
 100
 100
 100
 100
D7404
NOx
 170
 170
 230
 230
Tab. D
Fig. 18