Unit Cycle - Joannes G50/2 oil Manual De Uso Y Mantenimiento

pag. 72
Within the safety time, the photoresistor has to send the signal of "present" flame to the unit; the transformer is
C)
always working originating the phase of : post-ignition. After the post-ignition time, the transformer is disconnected
and the starting cycle ends.
C 1 ) After a certain time from the opening of the opening position corresponding to the total capacity, it controls the
opening of the VE2; the light oil reaches the nozzle G2 where it is ignited by the flame existing on the G1. The
intervention of the flame modulation thermostat will determine the high/low flame operation.
If there is no flame signal within safety time, the device interrupts the current to the motor, to the valve VE1 and to
C)
the transformer and moves on the position of block or safety, warning by the proper lamp. The release of the device
possible after 2 seconds from the stop by LOA44.
Ambient-boiler thermostat
Motor
Trasformer
st
Electromagnetic valve 1
Modulation thermostat
Air servo control
nd
Electromagnetic valve 2
Photoresistor
A - start
B - flame presence
- end of start
C
C-D - ordinary operation
- adjustment stop (TA-TC)
D
flame
flame
T1 pre-ventilations time
T2 safety time
pre-ignition time
T3
T3n post-ignition time
FOLLOW – STARTING
25 seconds
5 seconds
25 seconds
2 seconds

UNIT CYCLE