Diesel Ignition And Regulation - baltur GI MIST DSPGM Serie Manual De Instrucciones

DIESEL IGNITION AND REGULATION

• Check that the characteristics of the nozzle (delivery and spray
angle) are suitable for the furnace (see 9353/1). If not, replace it.
• Make sure there is fuel inside the tank and that it corresponds to
the type indicated in the product identification plate on the burner.
• Check that there is water in the boiler and that the gates on the
system are open.
• Make sure that the products of combustion can be released
freely (boiler and chimney gates open).
• Make sure that the voltage of the electric line to which the
burner is to be connected, corresponds to that requested by the
manufacturer, and that the motor's electrical connections have
been correctly prepared to match the voltage rating available.
Also check that all electric connections made on-site are
performed correctly as shown in our wiring diagram.
• Make sure that the combustion head enters the furnace to
the extent specified by the boiler manufacturer.
Check that the air regulation device on the combustion head is in
the appropriate position for supplying the required amount of fuel
(the passage of air between disc and head must be significantly
closed off if a small amount of fuel is supplied; if the nozzle
provides a rather high output, said passage must be significantly
opened); see chapter "Air regulation on the combustion head".
• Remove the protection cover of the rotating disc on the fuel/air
output adjustment servomotor, to reach the fuel and combustion
air adjustment screws.
• Turn the two modulation switches to "MIN" (minimum) and
"MAN" (manual).
• Start up the fuel supply auxiliary circuit, check its efficiency and
regulate the pressure at about 1 bar (if the circuit is supplied
with a pressure regulator).
• Remove the vacuum gauge connection point plug from the
pump, then slightly open the gate on the fuel pipe. Wait for the
fuel to flow out of the hole without air bubbles and close the
gate valve.
• Fit a pressure gauge (full scale ca. 3 bar) to the pump vacuum
gauge connection point to check the pressure value at
which the fuel reaches burner pump.
Insert a manometer (and of the scale about 30 bar) into the
manometer connection point provided on the pump and control
its working pressure. Fit a pressure gauge (full scale ca. 30 bar)
in the nozzle return pressure regulator connection point (8714/2)
to check the return pressure.
• Now open all gates and any other shut-off element on the
diesel pipes.
• Put the switch on the control panel in the "0" (open) position and
give current to the electric lines which the burner is connected
to. Manually press the specific remote control switches to check
that the fan and pump motors turn in the correct sense, and if
necessary change the position of two cables of the main line to
invert the rotation sense.
• Start the burner pump by manually pressing the relevant remote
control switch until the pump pressure gauge detects a slight
pressure. The presence of low pressure in the circuit confirms
that filling up has taken place.
• Insert the switch on the control panel to give current to the
control box. If the safety and boiler thermostats are closed, the
equipment programmer is activated and, according to the preset
programme, it enables the burner devices. The equipment turns
on as described in the chapter "Operation description".
• When the burner is working at its "minimum" output, adjust the air
to ensure a good combustion, loosen or tighten the adjustment
screws with the lever that moves the combustion air adjustment
gate. We recommend to keep the air quantity at a low level when
working at the "minimum" output to ensure a perfect ignition even
in the most difficult conditions.
• After having regulated the air for the "minimum", put the
modulation switches in the "MAN" (manual) and "MAX"
(maximum) positions.
• The fuel/air adjustment servomotor starts. Wait for the disc
with the adjustment screws to perform an angle of nearly 12°
(corresponding to the space of three screws) and turn the
switch to "0" to stop the modulation. Visually check the flame
and, if necessary, adjust the air and gas output by acting on the
adjustment disc screws to obtain an efficient combustion. The
operation above must be progressively repeated making the
disc turning by ca. 12° each time, and adjusting, if necessary,
the gas and air output along the modulation stroke. Make
sure that the gas output is progressive and gradual, and to
have the maximum output at the end of the modulation stroke.
This condition is necessary to ensure a good flame modulation.
The maximum output is obtained with a return pressure approx.
2 ÷ 3 bar lower than the delivery one (usually 20 ÷ 22 bar). For
a correct air/fuel ratio the detected value of carbon dioxide (CO
must increase as the output increases (indicatively at least 10%
at the minimum output up to the best value of nearly 13% at the
maximum output).
Do not exceed 13% of CO
a low quantity of air leading to an increase in the
smoke opacity for atmospheric pressure variations,
dust deposits in the fan air ducts, etc.. The smoke
opacity is strictly linked with the type of used fuel.
We recommend keeping the smoke opacity at a value lower
than no. 2 of the Bacharach scale, even if the CO
could be slightly lower. Reduced opacity soils the boiler less
and the average efficiency of the latter is normally higher
even if CO levels are slightly lower. Remember that a good
2
adjustment requires the system temperature to be at the
standard operating degree, and the burner being working
since at least 15 minutes. If the appropriate instruments are
not available, judgement can be based on the colour of the
flame. We recommend to adjust the system until obtaining
a light orange colour instead of a red flame with smoke, or
a white flame with too much air. After making sure that the
air/fuel mixture is correct, tighten the adjustment screws
retainers.
• Check the modulation automatic operation turning the switch
to AUT - or - MAN to "AUT" and the switch MIN - or - MAX to
"O". In this way the modulation is exclusively adjusted by the
electronic regulator controlled by the boiler probe, or by the 2nd
stage thermostat or pressure switch control in case the burner
is of the a two-stage progressive type.
19 / 44
0006080103_201309
)
2
to avoid working with
2
value
2