Natural Gas Starting Up And Regulation - baltur TBG 85 P Manual De Instrucciones

NATURAL GAS STARTING
UP AND REGULATION
NOTE: The burner has a switch to pass manually from the 1
the 2 stage.
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• Check that there is water in the boiler and that the gates on the
system are open.
• Make absolutely sure that the products of combustion can be
released freely (boiler and flue dampers must be open).
• 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 (motor or principle line) 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. To prevent ignition of the second
stage, turn the 1 and 2 stage switch on the printed circuit to
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the 1 stage position.
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• Regulate the air for the flame through the regulation cams of the
electric servomotor indicated in the following pages.
• Carefully manoeuvre the gas adjustment device valve to open,
for the amount presumed necessary, the first flame flow adjuster
(see the instructions for the two-stage gas valve for the model
installed on the burner). If necessary, of course, open the safety
valve flow adjuster completely if there is one.
• With the switch on the burner panel at the position "0" and the main
switch on, check, closing the contactor manually, that the motor
rotates in the right direction, if necessary swap the two power
cables for the motor around to change the direction of rotation.
• Turn on the switch on the control panel (1). The control
equipment thus receives voltage and the programmer causes the
burner to switch on as described in the chapter "DESCRIPTION
OF WORKING". During the preventilation stage you must check
that the air pressure control switch carries out the exchange
(from the closed position without pressure detection it must go
to the closed position detecting air pressure). If the air pressure
switch does not detect sufficient pressure (does not carry out the
exchange) the ignition transformer is not switched on, nor are the
gas valves, and so the equipment is stopped in its lock-out mode.
Upon first switching on, repeated "lock outs" may occur due to:
- The gas pipeline has not been adequately purged of air and
therefore the quantity of gas is not sufficient to allow for a
stable flame.
- A "shut down" with flame presence could be caused by flame
instability in the ionisation zone, due to and 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
may also be caused by a wrong air/gas distribution in the
combustion head. This can be solved with the combustion
head adjustment device by further closing or opening the
air passage between the combustion head and gas diffuser.
- It could happen that the ionisation current is help up by the
current discharged from the ignition transformer (the two
currents have to run the same course on the burner's "earth")
and so the burner goes to "shut down" due to insufficient
ionisation. This can be remedied by inverting the supply
(230V side) of the ignition transformer (swapping the two
wires carrying voltage to the transformer). This problem may
also be caused by an insufficient "ground connection" to the
burner's casing.
• With the burner working at the minimum output it is necessary
to
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to visually check the entity and aspect of the flame, and regulate
if necessary (work on gas and air supply) (see previous points).
Subsequently a check is carried out on the quantity of gas
supplied, by reading the meter. If necessary correct the gas
output and the relevant combustion air by acting as previously
described. Then check the combustion with the suitable
instruments. For a correct air/gas ratio you must find a carbon
dioxide (CO2) value for methane that is at least 8 % or O2 =
6% at minimum burner supply up to an optimal value of 10 %
or O2 = 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.
• Repeatedly check that the first stage is properly supplied. Switch
off the burner. Open the main switch and close the electric circuit
that controls the enabling of the second stage; position the 1
2 stage switch located on the printed circuit in 2
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• Open the manual regulator for the gas supply for the second
stage (main flame) to the presumed necessary quantity.
• Now switch the burner on again, turning off the master and
control panel switch. The burner switches on and automatically
switches on the second flame (main flame). Carry out an
immediate visual check on the extent of and appearance of the
flame, performing the necessary corrections with the gas and
air supply regulators as indicated in points 4 and 5.
1 Main switch on/off
2 Thermostat closing indicator light
3 Fan motor indicator light
4 Ignition transformer indicator light
5 1 stage gas valve light
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6 2 stage gas valve light
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7 Lock indicator light
8 Unlocking button
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and
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stage position.
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