20044359
14
Technical description of the burner
Operation sequence of the burner
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
00
02
12
22
24
30
36
38
40
42
44
50
52
60
62
70
72
74
81
82
83
80
3)
4)
2)
TSA1
TSA2
t1
90
p
a
T
P
P
T
P
10
Shutdown
Operation
Startup
Valve proving
OU
TP
U
T
S
IN
PU
T
S
Phase number
Fu
e
l
A
c
tu
a
tor
2
Ai
r
Act
u
a
to
r 1
Ac
tu
a
to
rs
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)
No-load position
Ignition load
Postpurge position
Nominal load
Low-fire
90°
0°
VSD
Motor (M)
Ignition transformer (Z)
Alarm (AL)
Safety valve (SV)
Fuel valve 1 (V1)
Fuel valve 2 (V2)
Pilot valve (PV)
No-load position
Ignition load
Postpurge position
Nominal load
Low-fire
90°
0°
No-load position
Ignition load
Postpurge position
Nominal load
Low-fire
90°
0°
Fig. 8
D9288
Signal ON
Signal OFF
Any signal is allowed
In standby: after referencing, the actuator is driven to the
no-load position
