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Operation sequence of the burner
Phase number
Safety limit thermostat (STB)
Control thermostat or pressurestat (R)
Flame signal (FS)
Air pressure switch (LP)
Pressure switch-min (Pmin)
Pressure switch-max (Pmax)
Valve proving / leakage test (P LT)
POC (alternative to Pmax)
Motor (M)
Ignition transformer (Z)
Safety valve (SV)
Fuel valve 1 (V1)
Fuel valve 2 (V2)
Pilot valve (PV)
Alarm (AL)
Nominal load
Postpurge position
Ignition load
No-load position
Nominal load
Postpurge position
Ignition load
No-load position
Nominal load
Postpurge position
Ignition load
No-load position
D9288
Legend to the sequence diagrams:
Valve proving takes place depending on the parameter:
2)
Only with valve proving on startup
3)
Parameter: with/without alarm in the event of start prevention
4)
In the event of an erroneous signal on startup, followed by
phase 10, otherwise phase 70
0°
Position as supplied (0°)
90° Actuator fully open (90°)
Assignment of times:
t1
Prepurge time
TSA1 Safety time 1 gas / oil
TSA2 Safety time 2 gas / oil
Technical description of the burner
00
02
10
12
22
24
T
T
p
a
P
P
P
3)
90°
Low-fire
0°
90°
Low-fire
0°
90°
Low-fire
0°
Operation
Startup
TSA2
t1
TSA1
30
36
38
40
42
44
50
52
60
Signal ON
Signal OFF
Any signal is allowed
In standby: after referencing, the actuator is driven to the
no-load position
13
GB
Shutdown
80
62
70
72
74
4)
Valve proving
81
82
83
90
2)
Fig. 8
20026767
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