Ignition And Regulation - baltur TBG 45 PN-V Manual De Instrucciones

IGNITION AND REGULATION

1) Check that combustion head penetrates the combustion cham-
ber by the amount requested by the manufacturer of the boiler.
Check that the air adjustment device that closes the air on the
combustion head is in correct position for the fuel supply required
(the air passage between the diffusor disk and the head must be
slightly reduced for low combustion supply and relatively open
when combustion supply is higher). See chapter "Combustion
head adjustment".
2) It is indispensable to carry out a purge of the air contained in the
pipeline, if it had not been carried out when connecting the burner
to the gas pipeline. As a precaution, special care should be taken
and doors and windows should be opened. Open the pipe union
on the pipeline situated near the burner and then open a little the
gas cut-off cock (or cocks). When the characteristic odour of gas
can be smelled, close the cut-off cock. Wait long enough for the
gas in the room to disperse, depending on local conditions, then
connect the burner to the gas pipe again.
3) Check that there is water in the boiler and that the system's gate
valves are open.
4) Make absolutely sure that the products of combustion can be
released freely (boiler and flue dampers must be open).
5) Make sure that the voltage of the electric line to which the burner
is to be connected, corresponds to that required by the burner
and that the electrical connections have been prepared to match
the voltage rating available. Check that all electrical connections
made on-site are performed correctly as shown in our wiring
diagram.
6) Apply a pressure gauge of appropriate scale to the pressure
intake of gas to indicate the adjustment value (if the amount of
pressure to be used permits, it is preferable to use a water column
instrument; do not use instruments with indicator hands for low
pressures). Rotate the manual head gas pressure adjustment
device to the position which is best with respect to the modula-
tion maximum thermal output and the furnace characteristics,
following the instructions laid out in the section "Manual head
gas pressure adjustment device".
7) Put the adjustment cam on the air adjustment electric servomotor
(see adjustment instructions 0002933651) in the positions which
are presumed to be appropriate in proportion to the minimum
thermal output, the modulation maximum and the ignition thermal
output.
8) Set the desired ratio between gas and air pressure, following the
adjustment instructions of the pneumatic valve in the attached
manual for the gas train installed
9) For initial adjustment operate the burner manually using the ap-
propriate modulation connector supplied as standard (see section
"instructions for manual operation of burner"). Now turn on the
I/O (22) switch on the control panel.
Note: Preventilation is carried out with air open and therefore,
at the same time, the regulation servomotor is switched on and
completes the full opening stroke cycle up to the "maximum" set-
ting. Only when the adjustment servomotor has returned to the
"ignition" position the control equipment will proceed with its pro-
gram by switching on the transformer and the ignition gas valve.
During preventilation, make sure that the air pressure switch
changes its status (from the closed position without pressure
measurement to the closed position with pressure measurement).
If the pressure switch does not detect sufficient pressure
(and does not change status), neither the transformer nor the
pilot flame gas valve are activated and the equipment locks
out. However, an occasional lock-out during the first stage
of ignition is normal, as air is still present in the valve train
pipeline. The air must be vented to obtain a stable flame.
To release, press the "reset" button (21) (see diagram
0002936311).
When 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) "lock out" with flame present may be caused by instability in the
ionisation area, due to an incorrect air/gas ratio. This can be
solved by changing the amount of air and/or gas supplied so
as to find the right ratio. This problem could also be caused by
a wrong air/gas distribution in the combustion head. This can
be remedied with the combustion head adjustment device by
closing or opening the air passage further between combustion
head and gas diffuser.
c) It may happen that the ionisation current is interfered with by the
discharge current of the ignition transformer (the two currents
have a common path on the burner's "mass") so the burner gets
locked out due to insufficient ionisation. This can be remedied
by inverting the supply (230V side) of the ignition transformer.
This problem may also be caused by an insufficient "ground
connection" from the burner's casing.
d) In the event that ignition is difficult it is advisable to use the ignition
flow proceeding with the inverter "VS" parameter adjustments
(see chapter FREQUENCY CONVERTER)
10) The minimum thermal output adjustment
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