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DETAILS OF THE MODULATION CONTROL MO-
TOR SQM 10 AND SQM 20 FOR REGULATION OF
CAMS
B = Insertion and disinsertion lever
Position 1 = Disinsertion
Position 2 = Insertion
To modify the regulation of the 3 cams utilized, operate the
respective red rings ( A - Z - M ).
By pushing with enough force, in the direction desired, each red
ring will rotate with respect to the reference scale. The index of the
red ring indicates on the respective reference scale the rotation
angle taken up for each cam.
Reference Index
Camsshaft
Adjustable Cams
Maximum air
opening
end of the run
Total air closure
(burner at a standstill)
Air ignition opening
motor connection Camshaft
25 / 34 0006080766
INSTRUCTIONS LFL 1.... CONTROL BOX
Control box for burners of average and high power, with forced
draught, intermittent service (*), 1 or 2 stages, or modulating
types, with supervision of the air pressure for controlling the
air damper.
This control box bears the EC mark, in accordance with the
Gas and Electromagnetic Compatibility Directive.
* For reasons of safety, it is necessary to make at least one con-
trolled stop every 24 hours!
As regards the standards
The following LFL1... features exceed the standards, offering
a high level of additional safety:
- The flame detector test and false flame test start immediately after
the tolerated post-combustion time. If the valves remain open, or
do not close completely after adjustment stops, a lock-out stop
is triggered at the end of the tolerated post-combustion period.
The tests will end only at the end of the pre-ventilation time of
the next start-up.
- The validity of working of the flame control circuit is checked each
time the burner starts up.
- The fuel valve control contacts are checked for wear during the
post-ventilation time.
- A built-in fuse in the appliance protects the control contacts from
any overloads that may occur.
As regards the burner control
- The equipment allows operation with or without post-ventilation.
- Controlled activation of the air damper to ensure pre-ventilation
with nominal airflows. Positions checked: CLOSED or MIN (po-
sition of ignition flame on start-up); OPEN at the beginning and
MIN at the end of the pre-ventilation time. If the servomotor does
not position the air damper at the points described, the burner
does not start-up.
- Ionization current minimum value = 6mA
- UV cell current minimum value = 70mA
- Phase and neutral must not be inverted.
- Any place may be used for installation and assembly (IP40
protection).
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