Rational SCC Line, Training Manual

Page: 83 / 186

-83-
S
S
C C
Sequence of events of Steam / Hot Air Burner (SCC as well as CM)
If no flame detected => new ignition sequence. After 5
th
ignition without success => RESET
16 24 19 20 17 18 10 11 14 15
Speed
of
bur
ner
blower
motor
in
U/min
21 22 23 26 27 6 7 8 9 0 1 4 5
8
4
3
2
1
25 12 13
F
l
a
m
e
c
u
r
r
e
n
t
in
µ
A
Time 2 3
7
6
5
Flame monitoring
Energise Solenoids: Black coils ca 205V D C / orange coils ca 108V D C
Ignition box gets heat demand over the BUS cable
Ignition, ca 20KV
Burner blower motor
Gas valve
Heat demand
Start
-
pre purge
about. 4-5 sec
Pre purge, 4 sec
RPM monitored
Blower runs with
St
art RPM
RPM monitoring by ignition box
Blower runs with
Ma
x or
Min
RPM
RPM monitoring by ignition box
Flame monitoring within. 2 sec
C
continuous flame control
Start RPM
Max RPM
Min
RPM
sec
RP
M
Ignition, 5 sec Pre ignition, 1sec
Start up Pre purge
Pr
e
ig
ni
ti
on
Ignition Burner running
Flame c
ont
rol
µA
Flame current