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4.12
Operation sequence of the burner
Timer - Resolution - Ratio
Timer 3 = max. phase time
RAST plug
Input signals
PIN number
Thermostat/pressure switch
X3-04 Pin 1/2
safety control
Thermostat/pressure switch
X5-03 Pin 1/4
indicator TL
X10-05 Pin 2 Pin 3/4
Ionisation probe ION
X10-06 Pin 1/2
Air pressure switch PA
X3-02 Pin 1/2
Min. gas pressure switch.
X5-01 Pin 2/3
PGmin
Min. gas pressure switch.
X5-01 Pin 2/3
PGMin
Max. gas pressure switch
X5-02 Pin 2/3
PGMax
Gas pressure switch for
X9-04 Pin 2/3
PGVP leak detection
Alternative to the FS
X5-02 Pin 2/3
CPI seal
RAST plug
PIN number
X3-05 Pin 1
Fan motor MV
Transformer of the
X4-02 Pin 2/3
TA ignition
X6-03 Pin 2/3
VS safety valve
X8-02 Pin 1/3
Fuel valve V1
X7-01 Pin 2/3
Fuel valve V2
X7-02 Pin 2/3
Pilot valve VP
X3-05 Pin 2
Lock-out signal
Post-purging pos.
X54
Pos. without load
Post-purging pos.
X53
Pos. without load
S8870
ON Signal
OFF Signal
Any signal is allowed
20010575
Technical description of the burner
Phase number
5)
6)
27s
5s
Timer 1 (parameters)
Timer 2 (parameters)
Pa
P
P
P
P
90°
Nominal load
Ignition load
Low flame
0°
90°
Nominal load
Ignition load
Low flame
0°
Operation
Start up
t1
TSA1
13)
0.6s
30s
16
GB
Checking of
Shutdown
seal
Fig. 7
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