baltur TBG 35 MC, Instruction Manual For Installation, Use And Maintenance

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CAUTION / WARNINGS
Check that the ignition takes place properly. If the passage
between the head and the disk is closed, the speed of the
(air/fuel) mix may be so high that ignition is difficult. Open the
gas valve speed regulator (if fitted) bit by bit to a position in
which ignition takes place correctly, and accept this as the final
position.
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 the set 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 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.
The gas pressure control switches (minimum and maximum) prevent
the burner from operating when gas pressure does not lie between
the expected range.
The minimum value pressure switch makes use of the NO (normally
open) contact which is closed when the pressure switch detects a
pressure higher than its own setting.
Adjustment of minimum and/or 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) locks out the burner immediately.
When first switching on the burner it is essential to check that they
work properly.
• Check the activation of the flame detector (ionisation electrode) by
disconnecting the ionisation cable and connecting the burner.
• Check the efficiency of the thermostats or boiler pressure switches
(they should shut down the burner when triggered).
The equipment must run through its cycle completely and, three
seconds after the ignition flame has formed, “lock-out”.
This test should also be conducted with the burner already on. The
apparatus should shut down immediately when the ionisation cable
is disconnected.
IMPORTANT
Once the adjusting operations are completed, visually check
that the thin plate on which the bearing acts has a progressive
profile.
Using the special instruments check also that in the passage
from the 1st to the 2nd stage combustion parameters do not
move too much away from the optimal values.
IONISATION CURRENT MEASUREMENT
To measure the ionisation current connect a microammeter in series
to the ionisation electrode cable by opening the connector “C” as
shown in the figure.
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