List of the phases
Ph00
Lockout phase
Ph01 Safety phase
Ph10 t10 = closure in pause
Ph12 Standby
Ph22 t22 = Uphill train of the fan motor (fan motor = ON,
safety valve = ON)
Ph24 The burner moves to the pre-purging position
Ph30 t1 = pre-purging time
Ph36 The burner moves to the ignition position
Ph38 t3 = pre-ignition time
Ph40 TSA1= safety time 1 (ignition transformer ON)
Ph42 TSA1 = safety time 1 (ignition transformer OFF),
t42 = pre-ignition time OFF
Ph = Phase
Ph44 t44 = interval time 1
Ph60 Operation
Ph62 t62 = max. time to reach the low flame (the burner
moves to the switch-off position)
Ph70 t13 = post-combustion time
Ph72 The burner moves to the post-purging position
Ph74 t8 = post-purging time
Ph80 t80 = emptying time (valve leak detection)
Ph81 t81 = atmospheric test time (valve leak detection)
Ph82 t82 = filling time (valve leak detection)
Ph83 t83 = pressure test time (valve leak detection)
Ph90 Standby time due to lack of gas
Checking of
seal
Operation
Switching offStart-up
t1 TSA1
Number of the phase
INPUT SIGNALS
Thermostat/pressure switch
OUTPUT SIGNALS
Thermostat/pressure switch
Ionisation probe ION
Air pressure switch PA
Minimum gas pressure switch
Maximum gas pressure switch
Gas pressure switch for leak
detection PGVP
Alternative to leak detection CPI
safety TS
Fan motor MV
Ignition transformer TA
Shutoff valve
Safety valve V1
Adjustment valve V2
Pilot valve VP
Limit lockout
indicator TL
SERVOMOTORS
air Fuel
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
Signal ON
Signal OFF
Any signal is allowed
Fig. 30
D7727
PGmin
PGM
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