Operating Cycle - Finterm Joannes G 50/2 Manual De Instrucciones De Manejo Y Mantenimiento

T11 Air shutter opening time, from 0 up to
max.
TW The closing of the thermostatic line and
of the PG starts; the PA has to be on rest
position.
T10 The motor start begins along with the
pre-ventilation phase: it lasts 3 seconds.;
within the end the air pressure switch
has to give its consent.
T1 This is pre-ventilation time, which lasts
at least 30 seconds, ending with the
start of the transformer.
Necessary signals during inlet
Signals during outlet
A The start begins
B Flame presence
B-C Operating
C Control stop
TMF High/low flame thermostat
C-D Shutter closing + post-ventilation

OPERATING CYCLE

T3 This is the time representing the pre-igni-
tion phase: it ends with the opening of
the gas valve and lasts 3 seconds.
T4 Gas between the opening of the gas
valve V1 and the opening of 2nd stage
V2: it lasts 8 seconds.
T6 Time of air shutter closing and of pro-
gram zero setting: it lasts 12 seconds.
T12 Time when the air shutter goes on start
position.
TC-PG Thermostat/gas pressure switch line
MB Burner motor
PA Air pressure switch
TR Ignition transformer
V1-V2 1
EC Control solenoid valve
MT Air servo control
9
st nd
-2 stage gas valve
FIG. 8