And Safety Unit - elco ES08.5200 G/F-VT Betriebsanleitung

Commissioning
Program of the LFL 1.333 (VARIO) control unit
Program of LFL 1.333 (VARIO) control
unit
t1:preventilation time 30s
t2:1st safety time
t3:pre-ignition 6s
- :safety time on
flame extinguishing< 1s
Electrical operation
The LFL... control and safety unit is
designed for intermittent service, limited
to twenty-four hours of continued use.
For reasons of clarity, not all electrical
components are included in the
schematic diagram.
It is assumed that:
- the power supply is compliant.
- the servomotor pressure switches and
cams have been pre-set correctly.
Commands from control and safety unit.
Required input signals.
Each phase of the control unit's program
is identifiable by a symbol visible on a
rotating disc near to the reset button.
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Program operating sequences:
3s
The terminal numbers
are those marked on
the base of the control

and safety unit.

Start of continuous monitoring of flame
presence.
05/2009 - Art. Nr. 4200 1017 4400A
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Motor powered up (terminal 6) if
- mains voltage is supplied to
terminal 1,
- the air flap is closed: the voltage
on terminal 11 switches to
terminal 8,
- the air pressure regulator is at
rest: the voltage on terminal 12
switches to terminal 4,
- the thermostats (limiter and cut-
out) and the min gas pressure
switch are closed: the voltage on
terminal 4 switches to
terminal 5.
Servomotor control
(cam I) in wide open position
(terminal 9) with confirmation of
opening (terminal 8): start of
preventilation.
Start of permanent air pressure
check by the pressure switch and
confirmation at terminal 14: the
circuit between terminals 4 and 13
is broken.
Servomotor control
(cam III) in ignition position
(terminal 10) and confirmed of
position (terminal 8).
Start of pre-ignition (terminal 16).
Simultaneous opening of the safety
valve and main valve (terminal 18):
start of safety time.
Ignition transformer shutdown
shortly followed by
End of safety time.
Power control enabled (terminal
20).
Burner shut down by cut-off of the
limiter thermostat then servomotor
(cam II) closing position control.
During continuous operation, a
thermostatic cut-off is obligatory
after twenty-four hours.