baltur GI 1000 LX Manual De Instrucciones página 43

and thus the gas quantity is not sufficient to allow
a stable flame.
10)Set the burner to minimum flame (modulation ser-
vomotor set to minimum), check the quantity and
appearance of the flame making the necessary ad-
justments: see instructions elating to the gas valve
model "SKP 75...", Afterwards, check the supplied
gas quantity by reading the meter. If necessary,
adjust the gas output and the relevant combustion
air by operating as described above. Then, check
the combustion with the special instruments (see
chapter "Combustion control".
11)After adjusting the "minimum", set the modulation
switches to MAN (manual) and MAX (maximum)
position. The air regulation servomotor sets to
"maximum" and as a consequence, also the gas
supply reaches the "maximum". The quantity of
supplied gas is then checked by reading the meter.
Avoid operating the burner if the flow rate is
more than the admissible for the boiler so as
to prevent possible damages to the same. Shut
down the burner after the two meter reads.
1)To change the maximum gas output, operate on the air
flow rate regulator since the gas flow rate automati-
cally adjust to the air supply. Then, operate on the cam
regulating the air damper maximum aperture position
(see n° 0009490). Reduce the aperture angle of
the air damper to reduce the gas flow rate, and vice
versa. To change the gas/air ratio, see instruction
of gas valve "SKP 75...".
13)Afterwards, check the combustion with the special
instruments and if necessary, check the existing
regulation (air and optionally gas). Check with the
special instruments that the carbon oxide (CO)
percentage in the flue gas does not exceed the
maximum admissible value of 0.1% and that CO
does not exceed 10% for methane. (See chapter
"Combustion control")
14) After adjusting the operation to the high flame
(maximum) you must operate so that the air regu-
lation servomotor sets to the minimum to perform
the control also in this position.
15) To set the air – and thus gas – regulation servomo-
tor to the minimum, set the modulation switch to
MIN.
16) When the air servomotor is set to minimum, and it
is necessary to change the combustion conditions
(gas/air), see the instructions for regulating gas
valves model "SKP 75...".
17) It is advisable to perform the combustion control
using the instruments and, if necessary, change
the previous regulation also in some intermediate
points of the modulation stroke.
18) Now, check the correct automatic modulation opera-
tion.
19) In case of UV photoelectric cell, after at least
one minute from ignition extract the photoelectric
cell from its housing. When the UV photoelec-
tric cell is extracted from its housing, it cannot
"see" the ultraviolet radiation emitted by the
flame and thus, the relevant relay de-energises.
The burner immediately shuts down in "lock".
A light greasiness strongly affects the passage of
ultraviolet beams through the UV photoelectric cell
bulb, thus preventing the internal photosensitive
element from receiving the necessary radiation for
a correct operation. If the bulb is dirty with light oil,
heavy oil, etc., clean it accurately. Note that a simple
finger contact can cause a light greasiness, suffi-
cient to impair the UV photoelectric cell operation.
The UV photoelectric cell does not "see" daylight or
the light of a common candle. A possible sensibility
check can be made with a flame (lighter, candle)
or with the electrical discharge occurring between
the electrodes of a common ignition transformer.
To ensure a correct operation, the UV photoelec-
tric cell current value must be sufficiently stable,
and must not decrease below the minimum value
required for the specific control box. Said value is
shown in the wiring diagram. It may be necessary
to experimentally search the best position by mak-
ing the body containing the photoelectric cell slide
(axial or rotation movement) with respect to the
fixing clamp.
20) Check the efficiency of the boiler thermostats or
pressure switches (their start must shut down the
burner).
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