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11. GENERAL INSTRUCTIONS
11.1 Adjustment of burner
The burner is from the factory pre-set to an average value that must
then be adjusted to the boiler in question. All burner adjustments must
be made in accordance with boiler manu-facturers instructions.These
must include the checking of flue gas temperatures, average water
temperature and CO
2
or O
2
concentration.
General instructions
The installation of the gas burner must be carried out in accordance
with current regulations and standards. The installers of gas burners
should therefore be acquainted with all regulations and ensure that the
installation complies with the requirements. The installation, mounting
and adjustment should be made with the greatest care and only the
correct gas should be used.
Operating instructions
The operating instructions accompanying the burner should be left in a
prominent position in the boiler room.
Instructions
The user should be thoroughly in-structed in the function of the gas
burner and the whole installation. The supplier must instruct the user.
Inspection and maintenance
Daily inspection is advisable.
Start up
After the burner has been fitted to the boiler and the electric connec
-
tion, the leakage control, the venting and the electric function test have
been carried out, the burner will be ready for start-up.
Howerer, study the sections dealing with adjustments of multi-bloc,
combustion air and combustion head. Open the ball valve and switch
on the main switch. If the burner starts the actual adjustment can be
made.
Adjustment of burner head
The burner is equipped with an adjustment device changing the po si-
tion of the brake plate in the burner head. This is used to adjust the
cor rect pressure drop over the com bus tion device in order to obtain a
good pulsation free combustion.
Which position to use depends on input and overpressure in the boiler.
A general rule is that the lower capacity the smaller the opening be-
tween brake plate and combustion device.
Commissioning of installation
Control of the combustion. The combustion quality is checked by
means of a flue gas analysis device. Adjust the burner to appr. 20%
excess air in accordance with the table. Check the flue gas temperature.
Calculate the efficiency. Check also the actual gas volume on the gas
meter so that the correct input is achieved.
11.2 Service
Service should only be carried out by qualified personnel. Replacement
parts should be of the same make and approved by the same authori-
ties as the original. If the burner is converted to fire another gas quality
it must be re-commissioned. If town gas is to be fired the combustion
head must be converted and the gas train adjusted to suit (e.g.a larger
gas armature or a different spring in the governor may be required).
Gas quality
CO
2
% O
2
%
max. CO
2
%
lambda 1,2
Natural gas
10,0
3,5
11,9
LPG
11,5 3,5 13,9
