baltur TBG 85P, Instruction Manual For Installation, Use And Maintenance

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ENGLISH
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0006081041_201809
• For a correct air/gas ratio a carbon dioxide (CO2) value for
methane must be detected that is at least 8% at minimum burner
output up to an optimal value of 10% for maximum output. Do not
exceed the value of 10%, so as not to operate with limited excess
of air (e.g. due to variations in combustion air temperature,
atmospheric pressure, presence of small deposits of dust in
the fan air duct, etc.). which could cause a marked increase in
CO (carbon monoxide). 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 activation of the second stage, set the switch on
the printed circuit to the second stage position.
• Open the manual regulator for the gas supply for the second
stage to the presumed necessary quantity.
• Now switch the burner on again, turning off the master and
control panel switch. The burner will switch on and automatically
activate the second stage. Carry out a visual check on the extent
and aspect of the flame, performing the necessary corrections
with the gas and air supply regulators, as previously mentioned.
• Use the adjuster to set the correct flow rate for the second flame
as required for the specific case. You must not keep the burner
running if the capacity is greater than the maximum amount
permitted for the boiler, or there is a risk it could be damaged.
It is therefore best to stop the burner immediately after the two
meter readings.
• Subsequently, with the burner at maximum supply required by
the boiler, check the combustion with the special instruments and
if necessary change the adjustment previously carried out (air
and possibly gas) with just the visual check (CO2 max. = 10 %
O2 min =3% - CO max. = 0.1%)
AIR PRESSURE SWITCH
The air pressure switch stops the equipment operation if air
pressure is not at the expected value.
The pressure switch must therefore be adjusted so that it is
triggered to close the NO (normally open) contact when the air
pressure in the burner reaches a particular value.
If the air pressure switch does not detect a pressure greater than
that calibrated, the equipment runs through its cycle but does not
switch on the ignition transformer and does not open the gas valves
and so the burner “locks-out”.
To ensure the air pressure switch correct operation, with burner at
the minimum output, increase the adjustment value until reaching
the triggering value which must be followed by the immediate
burner lock-out.
To ensure correct operation of the air pressure switch you must,
with burner on and in 1st stage, increase its regulation value until
the burner triggers and then it immediately “locks-out”.
To unblock the burner, press the special pushbutton and return the
pressure switch regulator to a sufficient value in order to measure
the air pressure existing during the pre-ventilation phase.
GAS CONTROL PRESSURE SWITCHES
The gas pressure control switches (minimum and maximum)
prevent the burner from operating when gas pressure does not lie
between the expected range.
The maximum pressure switch makes use of the NC (normally
closed) contact which is closed when the pressure switch detects a
pressure lower than its own setting.
Adjustment of minimum and maximum pressure values on the
pressure switches must be performed when testing the burner, on
the basis of the pressure measured in each case.
The triggering (opening of the circuit) of any of the pressure
switches when the burner is running (flame on) causes the burner
to stop immediately.
When first switching on the burner it is essential to check that they
work properly.
CAUTION / WARNINGS
Check that the ignition takes place properly. In the event that
the mixer is too far forward, it may happen that the speed
of the delivery air is so high that ignition is difficult. If this
happens, the mixer must be gradually shifted back until it is
in a position in which ignition occurs normally, and this new
position can be regarded as the final position.We remind you
that is preferable, in the case of the small flame, to limit the
quantity of air to the lowest amount possible needed for safe
ignition, even in the most difficult circumstances.|bb|