21
CONTROLS IN CASE OF OPERATION PROBLEMS
LIGHT OIL BURNER
MODEL SPARK
Extraneous light / advanced ignition
During the pre-ventilation 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-ventilation
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 and 11: in the same,
by means of 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”
t1 Pre-ventilation 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
Execution
Tension
Type
Safety at
low voltage
Pre-ventilation
Pre-starting
Safety
time
Post-starting
Time
interval
V ~
Without
base
•
t1
t3
t2
max
t3n
BV1 - BV2 t4
Normal
220 V / 240 V
220 V / 240 V
LOA21.171B27
LOA24.171B27
-
•
13 s
13 s
13 s
13 s
10 s
10 s
15 s
15 s
15 s
15 s
