49
GENERAL INSTRUCTIONS
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 connection,
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 position of
the brake plate in the burner head. This is used to adjust the correct pressure
drop over the combustion 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 between
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.
Service
Service should only be carried out by qualified personnel. Replacement
parts should be of the same make and approved by the same authorities
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).
172 305 28 04-01
Gas quality CO
2
%0
2
% max. CO
2
%
lambda 1,2
Natural gas 10,0 3,5 11,9
LPG 11,5 3,5 13,9
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