CONTROL BOX SPECIFICATIONS
Extraneous light / advanced ignition
During the pre-purging and/or pre-starting phase there
shall be no flame signal. Should the signal be present, for
example for advanced ignition due to bad tightness of the
electrovalve, external lighting, short-circuit in the photo-
resistance or in the connecting cable, a breakdown in the
flame signal amplifier, and so on., when the pre-purging
and safety time has elapsed, the control-box brings the
burner to the emergency stop and cuts off fuel inflow even
during the safety time.
No flame
If there is no flame at the end of the safety time, the control-
box stops the burner immediately.
No flame during operation
If there is no flame during operation, the control-box cuts
off fuel and automatically repeats a new starting program:
once the “t4” time has elapsed, the starting program is
over.
Every safety stop of less than 1 second switches off voltage
to terminals 3 - 8 - 11: and to terminal 10, it is possible to
provide a remote signal of emergency stop. Resetting of
the control-box is possible after approx. 50 seconds of
emergency stop.
Program Legend
Control-box output signals
Input signals required
A’ Beginning of starting cycle for burners
with light-oil pre-heater “OH”
A Beginning of starting cycle for burner
without light-oil pre-heater
B Flame presence
C Normal operation
D Adjustment stop by “R”
tw Light-oil pre-heating time until operation consent
by contact “OW” (minimum thermostat)
t1 Pre-purging time
t3 Pre-starting time
t2 Safety time
t3n Post-starting time
t4 Time interval between flame presence and
connection of 2nd valve to terminal 5
Tension Type Safety
at
Pre-purging
Pre-starting
Safety
Post-starting
Time
low voltage
time
Interval
V ~
t1
t3
t2max
t3n
BV1-BV2=t4
220/240 LOA 24.171 B27
YES
13 s
13 s
10 s
15 s
15 s
PREPARATIONS FOR START UP
Make sure that the return pipe in the tank has no obstructions, e.g. gate valves, closed plugs etc. Any eventual
obstruction would cause a breakage in the sealing surface situated on the pump shaft. Close the main switch
and the boiler thermostats in order to start up the motor and the ignition transformer. Upon completion of the
pre-ventilation time, the solenoid valve is activated. The electrovalve will cut in and expose the photocell to a
source of light until the burner stops (lock-out). When the pipelines have been filled up (and when fuel has come out
of the nozzle), stop the burner and put the photocell back in its seat.
NOTE:
Should it be necessary to purge air, this can be done by loosening the special fitting which the pump is
provided with.
Do not illuminate
the photocell before the electric valve has cut in because, in this case, the
control box will go to “lock-out”.
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