Idiomas disponibles
Idiomas disponibles
stage switch on the printed circuit at its 1st stage position for
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burners.
2) Slightly open the air shutter and let in an amount of air deemed
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to be necessary for burner operation with the 1st flame and fix
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it in this position;
3) Close the isolating switch and control box switch.
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4) The small motor of the cyclic relay which will start to rotate
causing the connection of the burner component devices
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according to the preset program. The burner will start operation
as described in the Chapter "Description of Operation".
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5) When the burner operates with the 1st flame, adjust the amount
of air necessary,for an efficient combustion by following the
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previous description under n. 2.It is better if the amount of air
for the 1st flame is slightly reduced in order to ensure a perfect
ignition also in the most critical conditions.
6 After adjusting the amount of air for the 1st flame, stop the
burner by cutting off the current from isolating switch, connect
the terminals on the terminal board of the 2nd flame thermostat
among them and settle the 1st and 2nd stage switch in 2nd
stage position.
7) Adjust the screw which restricts the stroke of the hydraulic
piston controlling the air shutter of the 2nd flame; unscrew it
that amount which is deemed to be necessary to burning fuel.
Remarks: Before turning the adjusting screw, loosen the lock nut
and after completing the adjustment, tighten it up again.
8) Now connect the burner again; it will start and automatically
switch to the 2nd flame according to the present program.
9)
With the burner operating with the 2nd flame, adjust the
amount of air necessary to ensure an efficient combustion with
the screw mentioned under item 7. Combustion test should be
made using appropriate instruments. Make the regulation so as
to obtain a certain amount of carbon dioxide (CO
varying from min. 10% to max. 13% with a smoke number not
exceeding 2 (Bacharach scale).
CHECKS
After starting up the burner, check the safety devices (photoresistance,
block, thermostats).
1) The photocell is the flame control device and so it should trip
if the flame extinguishes during operation (this check should
be made after at least 1 minute from lighting up).
2
The burner should be capable of blocking itself and
remain so when a normal flame does not come on during
start-up cycle and within the preset on control box.
The "lock-out" causes the motor and the burner to stop
immediately and corresponding "lock-out" warning lamp lights
up.To check the function photoresistant-cell and lock-out
system proceed as follows:
a) Start up the burner.
b)
After at least one minute, remove the photo-cell from its seat
and pull it out and simulate flame failure by covering the photo-
cell (use a rag to close the window in the photocell support).
The burner flame should go to lock-out.
c)
Keep the photo-cell in the dark and the burner will start again,
but the photo-cell does see the light and the burner goes to
lock-out within the time preset by control box. The control
box can be reset only manually by pressing the appropriate
push-button.
3)
To check the thermostat efficiency, run the burner until the
water in the boiler reaches a temperature of at least 50 °c
and then turn the thermostat control knob to reduce the
temperature until an opening click is heard and simultaneous
stopping of the burner. The thermostat should trip within a
maximum tolerance of 5 to 10 °C in respect to the control
thermometer (boiler thermometer); if not, change the setting
on the thermostat scale to match that of the thermometer.
) in the smoke,
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