CONTROLS
After starting the burner, check the safety devices, photoresistor, lock
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 must lock out and remain in that condition when, during
the ignition sequence in the time pre-set by the control device, the
flame does not appear regularly.
•
The lock-out causes the immediate stop of the motor and burner and
the switching on of the corresponding lock-out light indication.
Proceed as follows to check the efficiency of the photoresistor and the
relating lock-out warning light:
•
Start 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 photoresistor darkened to restart the burner, but if the
photoresistor does see the light within the time preset by the control
device, the burner will lock-out.
•
The equipment can only be reset manually by pressing the specific
button.
•
To check the thermostats’ efficiency, increase the boiler water
temperature up to at least 50° C.
•
Act on the thermostat control knob to lower the temperature until the
burner stops.
•
The thermostat should activate within a maximum range of 10° C
with respect to the boiler thermometer; if not, change the setting on
the thermostat scale to match that of the thermometer.
AIR REGULATION ON THE COMBUSTION HEAD
The combustion head is equipped with a regulation device that makes
it possible to open or close the air passage between the disk and the
head.
Closing the air passage increases the pressure upstream of the disk
also with low flow rates.
The high speed and turbulence of the air provides for its greater
penetration into the fuel and therefore an excellent mixture and flame
stability.
It may be necessary to have high air pressure upstream of the disc, so
as to prevent flame pulses. This condition is indispensable when the
burner operates on pressurised combustion chamber and/or with high
heating load.
Therefore the air regulation device on the combustion head must be
set to such position as to always obtain, behind the disc, a very high
pressure value.
To do this fasten the device in an intermediate position on the head air
closure, and act on the air damper by increasing the fan intake flow;
needless to say that this condition must occur when the burner is
working at the maximum capacity required by the system.
Correct the position of the device that closes the air of the combustion
head, moving it forward or backward, in order to obtain an air flow
suitable for the supply with the air damper considerably open.
16
15
11
10
0002935410
X = Head-disk distance; adjust distance X following the instructions:
•
loosen the screws (10),
•
turn screw (11) to position the combustion head (16) referring to
index (15).
DANGER / ATTENTION
The adjustments are indicative only; position the combustion
head according to the characteristics of the combustion chamber.
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