baltur GI 350 DSPG, Installation, Use And Maintenance Instruction Manual

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ENGLISH
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• Make sure that the air/fuel regulation is correct, tighten the locking
screws of the modulation adjustment screws.
• Now check that the modulation system is operating correctly by
turning the (S4) switch to “AUT” and the (S5) switch to “O”.
• In this way the modulation is exclusively enabled by the boiler
probe automatic control, in case the burner is equipped with the
modulation kit, or by the thermostat or the second stage pressure
switch control in case the burner is of the two-stage progressive
type.
• Usually it is not necessary to act on the internal adjustments of the
electronic power regulator; however, the relevant instructions are
contained in the supplied booklet.
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 contact (normally open) 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”.
Release the burner by pressing the appropriate button and readjust
the pressure switch until preventilation air pressure can be detected.
Air pressure sampling point is upstream the air shutters.
Adjust the setting of the pressure switch to a level slightly below the
actual air pressure detected in first stage operation. Reset the burner
and check that it starts up correctly.
FLAME CONTROL DEVICE
After starting up the burner, check the safety devices, photocell, lock-
out components, thermostats.
• The photoresistor is the device controlling the flame and therefore
must be able to intervene if the flame turns off during operation.
• The burner should lock out and remain locked when, during the
ignition sequence in the time pre-set by the control box, the flame
does not regularly appear.
• The lock-out causes the immediate stop of the motor and burner
and the switching on of the corresponding lock-out indicator light.
To check for the efficiency of the photocell and lock-out indicator light,
proceed as follows:
• Start up the burner.
• After ignition, remove the photoresistor, pulling it out of its housing,
to simulate absence of flame by darkening the photoresistor
blocking off the window in the photoresistor support with a cloth
• The burner flame must go out.
• Keep the photocell in the dark and the burner will start again, but
the photocell does see the light and the burner goes to lock-out
within the time preset by the control box.
• The control box can be reset only manually by pressing the
appropriate button.