Methane Gas Ignition And Adjustment - baltur TBG 45PN Mode D'emploi

METHANE GAS IGNITION AND ADJUSTMENT

1) Check that the combustion head penetrates into the combustion
chamber to theextend required by the boiler manufacturer .
Check that the device that closes the air at the combustion head
is presumable in the position suited for the required supply of
fuel (the passage of air between the disk and combustion head
must be significantly reduced , if in the opposite case the fuel
supply is rather high, the passage between disk and combustion
head must be relatively open). See chapter "Adjustment of
combustion head".
2) If it has not already been down when connecting the burner to the
gas piping, it is essentially to vent the air in the pipes, which should
done with doors and windows open. The connector on the piping
close to the burner must be opened and then the tap or taps that
shut off the gas must be opened a bit. Wait until you can smell the
gas and then close the tap. Wait a sufficient length of time, which
will depending on the specific conditions, until the gas in the room
disperses outside and then connect up the burner again to the gas
piping.
3) Check that there is water in the boiler and that the system's
gate valves are open.
4) Check very thoroughly that the combustion products exhaust
path is free (boiler gates and flue open).
5) Check that current to be connected corresponds with that
required by the burner and that the electrical connections
(motor and main line) are set for the available power supply.
Check that all the electrical connections carried out on site
have been correctly performed as in our wiring diagram.
6) Apply a pressure gauge with suitable scale to the gas pressure
outlet to check the set value (if the pressure provided for permits
it is preferable to use a water column instrument and not use
those with pointers for modest pressures).Turn the manual gas
pressure control on the head into the position you consider most
suitable in view of maximum thermal modulation capacity and
the furnace characteristics, following the instructions provided
in the section entitled "Manual gas pressure control on the
head".
7) Put the air adjustment electric servo motor cams (see adjustment
instruction 0002933651) to the positions you presume are
suitable in proportion to the minimum and maximum modulation
thermal flow and to the ignition heat input.
8) Set the desired value for the ratio between the gas and
air pressures, following the pneumatic valves adjustment
instructions given in the manual provided with the gas train
installed
9) On models with a three-phase power supply, with the I/O switch
(22) on the burner panel (see drawing 0002935620) in the "O"
position and the main switch on check, by manually closing
the contactor, that the motor turns in the correct direction, if
necessary, swap around the two power cables for the three-
phase motor to invert the direction of rotation.
10) For initial adjustment, use manual burner operation with the
modulation connector supplied with the burner (refer to the
section on "Instructions for manual burner operation"). Now
turn on the I/O switch (22) on the control panel.The control box
is now powered up and the programmer sets the burner as
described in the chapter "description of working".
Note: Preventilation is carried out with air open and so the
adjustment servo motor is switched on performs its complete
opening run up to the set "maximum". Only when the adjustment
servo motor has returned to the "switch on" position will the control
box carry out its ignition program, switching on the transformer and
gas valves for ignition.
Check during preventilation that the pressure switch that controls
air pressure in fact exchanges (from the closed position where no
pressure is detected it must pass to the closed position with air
pressure detection).
If the air pressure switch does not detect sufficient pressure (does
not carry out the exchange), the ignition transformer does not
switch on and the valves for the ignition flame also do not switch,
with the result that the control box goes to "lock-out". It should be
pointed out that some "locking out" during this phase of first switch
on can be regarded as normal because the ramp valves piping
will still have some air in them and this must be eliminated before
a stable flame can be achieved. To release, press "release" (21)
(see drawing 0002935620),
On first switching on, repeated "lock outs" may occur due to:
a) The gas piping not being freed of the air sufficiently and so the
gas quantity is not enough to provide a stable flame.
b) The "lock-out" with flame on may be caused by flame instability
in ionisation area, due to incorrect air-gas mix. This can be
remedied by varying the quantity of air and/or gas until the
right ratio is found. The same problem may be caused by
incorrect air/gas distribution in the combustion head. This can
be remedied with the combustion head adjustment device by
closing or opening further the air passage between combustion
head and gas diffuser.
11) Set the burner at minimum thermal capacity of modulation
(air damper control servo motor at minimum), positioning the
modulation connector switch in in the MIN position (refer to
the section on "Instructions for manual burner operation).
Check the size and appearance of the flame, making any
necessary corrections. To do this, follow the e instructions for
the pneumatic valves. Then carry out a meter reading check
on the quantity of gas supplied. If necessary adjust gas and
combustion air supply as described previously (points 7 and
8). Subsequently the combustion is checked with the special
instruments. For the correct air-gas mix, the carbon dioxide
level must be measured. (C02) for the methane is at least 8%
or O2=6% on minimum burner supply up to a ideal value of 10%
or 02= 3% for maximum supply. It is essential to check, with a
suitable instrument, that the percentage of carbon monoxide
(CO) present in the fumes does not exceed the limit set by
regulations at the time of installation."
12) After adjusting the burner to minimum thermal capacity, set the
modulation connector switch to the MAX position. The servo
motor that regulates the air is put at "maximum" and so also the
gas supply reaches maximum thermal capacity. A check must
then be carried out on the quantity of gas supplied (by reading
the meter). With burner on at maximum existing supply, the gas
flow is measured as the difference between the two readings
at exactly one minute between one and the other. Multiplying
the value obtained by sixty you obtain the flow in sixty minutes,
i.e. per hour. Multiplying the supply per hour (m3/h) for the gas
calorific power you obtain the power supply in kcal/h which
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