baltur Minicomist 7 Manual page 12

STARTING UP AND REGULATION WITH LIGHT
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OIL
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1) Check that the pump and fan motors rotate in the right direction.
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2) Make sure that the discharge of combustion products can take
place freely (chimney lock-gates should be open) and that there
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is water in the boiler.
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3) Open as much as considered necessary, the combustion air
regulator, and open by about half the air passage between
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the disk and the head by operating the regulating screw of the
flame disk.
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4) Close the main switch and the burner switch in order to connect
the burner and wait for it to start up. The burner is turned on in
this way, and will carry out the pre-ventilation phase. If the air
pressure exceeds the value at which the air pressure switch
has been set, the ignition transformer will be connected and
subsequently the light oil valve will be inserted. With the burner
operating, correct if necessary, the combustion air delivery.
5) The burner is fitted with a device which optimises the combustion
by reducing or increasing the air passage between the disk and
the head. Maximum smoke intensity permissible is N° 2 of the
Bacharach scale with a Carbon Dioxide (CO
10 and 13 %. It is normally necessary to reduce the air passage
between the disk and the head when operating with a reduced
fuel delivery. This passage must be proportionately opened
more when the burner is working with a higher fuel delivery.
This manoeuvre can be carried out by operating the regulating
screw of the flame disk. After having modified the flame disk
position, it is then necessary to verify that ignition occurs
correctly.
STARTING UP AND REGULATION WITHMETHANE
GAS
N.B.
Please refer to the last pages where specific instructions are
given with regard to regulating the gas delivery in function
with the type of valve fitted on the burner.
In order to proceed with ignition, it is indispensable to carry out a
purge of the air contained in the pipeline and check, if the burner is
three-phase, that the sense of rotation of the motor is correct.
Then proceed as follows:
1) Make sure that the discharge of combustion products can take
place freely (chimney lock-gates should be open) and that there
is water in the boiler.
2) Open, as much as considered necessary, the combustion air
regulator, and open by about one third the air passage between
the head and the disk by operating the regulating screw of the
flame disk.
3) Operate the regulators incorporated in the gas valves in such
a way as to obtain the gas delivery presumed necessary.
N.B. Please refer to the last pages where specific instructions
are given with regard to regulating the gas delivery in
function with the type of valve fitted on the burner.
4) Give current to the burner by connecting the main switch and
the burner switch. The burner is turned on in this way and will
then carry out the pre-ventilation phase. If the air pressure
exceeds the value at which the air pressure switch has
been set, the ignition transformer will be connected and,
subsequently, the gas valves will be inserted. The safety valve
opens completely while the principle valve, which incorporates
the regulation devices, opens twice. When it opens the first time,
it realises the starting output immediately. The second time, it
opens gradually and when it is completely open the burner is
operating at the maximum value at which the maximum output
regulator has been set. At first ignition, successive "shutdowns"
can occur, due to the following reasons:
a) The gas pipeline has not been adequately purged of air
and therefore the quantity of gas is not sufficient to allow
a stable flame.
b) A "shutdown" with flame presence can be caused by
flame instability, due to an incorrect air/gas ratio. This
can be remedied by varying the quantity of air and/or gas
delivered, in order to find the correct ratio. It could also
be caused by an incorrect distribution of air/gas in the
combustion head. This can be corrected by operating the
regulation device of the combustion head – close more
) value between (by loosening the regulating screw) or open more (by
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tightening the regulating screw) the air passage between the
head and the gas diffuser. This can be done by operating
the regulating screw of the flame disk.
5) With the burner on, adapt delivery to the value which
corresponds with the potentiality desired (Methane gas = 8550
kcal/m
operating the special regulator incorporated in the valve, as
explained above.
6) Control that combustion occurs correctly by using the
appropriate instruments. The maximum permissible for Carbon
Monoxide (CO) is 0,1%; with a Carbon Dioxide (CO
between 8 and 10%.
7) After regulation, turn the burner off and on again several times
to check that ignition occurs correctly.
SAFETY CHECKS
After regulation, always check:
1) That the burner stops by "opening" the thermostat and the air
and gas pressure switches;
2) The "shut down" by darkening the photoelectric cell (UV).
To unblock the burner, press the appropriate pushbutton.
MAINTENANCE
At the end of the heating season, it is good practice
to clean the gas and light oil filters, the combustion head
(disk, insulators, and nozzles), the combustion air passages and
the photoelectric cell (UV). It is advisable to use wooden or plastic
instruments to clean the nozzle passages. Nozzles should be re-
placed after 12 months' use.
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), by reading the meter. This output can be modified by
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) value of
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