position.
•
Turning the screw that limits the piston travel distance in the
case of models with hydraulic jack (see 0002935420) or use air
adjustment cam air of the 2
nd
0002935210) and set the air shutter opening in the 2
at a position considered suitable for the desired supply of fuel.
•
Now connect the burner again; it will start and automatically
switch to the 2
flame according to the present program.
nd
•
With the burner operating with the 2
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
from min. 10% to max. 13% with a smoke number not exceeding
2 (Bacharach scale).
When first switching on the burner, shut downs may be
!
experienced during the passing from 1
the presence of air in the jack circuit. Slightly loosen the nut
blocking the jack pipe, carry out a few operating cycles until
there is a discharge of diesel from the nut / connection of
the jack. Tighten the nut when the operation is finished.
CHECKS
After starting up the burner, check the safety devices (photoresistance,
block, thermostats).
•
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).
•
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:
- Start up the burner.
- 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.
- 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.
•
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.
flame for servo motor models (see
stage
nd
flame, adjust the amount
nd
) in the smoke, varying
2
- 2
flame due to
st
nd
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