Start-Up, Calibration And Operation Of The Burner; Notes On Safety For The First Start-Up; Adjustments Prior To Ignition; Combustion Adjustment - Riello 568 M Installation, Use And Maintenance Instructions

5

Start-up, calibration and operation of the burner

5.1

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
5.2

Adjustments prior to ignition

 Check the adjustment of the head as shown in page 14.
 Check the adjustment of the air damper as shown in
page 14.
 Slowly open the manual valves situated upstream from the
gas train.
 Adjust the air pressure switch (Fig. 20) to the start of the
scale.
5.3

Combustion adjustment

In conformity with EN 676 the application of the burner on the
boiler, adjustment and testing must be carried out observing the
instruction manual of the boiler, including verification of the CO
EN 676
Theoretical max
GAS
G 20
G 25
G 30
G 31
5.4

Air pressure switch

Adjust the air pressure switch (Fig. 20) after performing all other
burner adjustments with the air pressure switch set to the start of
the scale.
With the burner operating at minimum output, turn the knob coun-
ter-clockwise, increasing its value until the burner switches off.
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
anticlockwise 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%.
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
Refer to paragraph "Safety test - with gas ball
valve closed" on page 21 before the first start-
up.
WARNING
 Purge the air from the gas line.
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
and CO2 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. F.
Air excess: max. output.   1.2 – min. output  1.3
Setting CO2 %
 = 1.3
9.0
8.8
10.7
10.5
19 GB
CO
mg/kWh mg/kWh
 100
 100
 100
 100
D7404
NOx
 170
 170
 230
 230
Tab. F
Fig. 20
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