6.6
Operation sequence of the burner
Phase number (Ph)
Thermostat/pressure switch
safety TS
Thermostat/pressure switch
indicator TL
Ionisation probe ION
Air pressure switch PA
Minimum gas pressure switch PGmin
Maximum gas pressure switch PGM
Gas pressure switch for leak
detection PGVP
Alternative to leak detection CPI
Fan motor MV
Ignition transformer TA
Shutoff valve
Safety valve V1
Adjustment valve V2
Pilot valve VP
Limit lockout
Pos. of post-purging
Pos. without load
Pos. of post-purging
Pos. without load
D7727
Key (Fig. 34)
Signal ON
Signal OFF
Any signal is allowed
Allocation of the times:
t1
Pre-purging time
TSA1 Safety time 1 gas/light oil
0°
Position at the time of the supply (0°)
90°
servomotor with maximum opening (90°)
20040563
Start-up, calibration and operation of the burner
00
01
10
12 22 24 30 36 38 40 42 44 60 62 70 72 74
P
P
Pa
P
P
P
90°
Nominal load
Ignition load
Low flame
0°
90°
Nominal load
Ignition load
Low flame
0°
Operation
Start-up
Switching off
t1
TSA1
30
GB
Checking of
seal
80 81 82 83
90
Fig. 34