Appendix
Process Sequence Chart
Gas operation with pilot burner, leakage test and Ignition flame monitor
nd
t9 2 safety period 3 sec.****
t10 Operating phase any
t11 Control mode any
t12 Time for pressure relief
in the gas test line 3 sec.
t13 Post-ventilation time 0-999 sec. adjustable
t14 Control elements at base load
t15 After-burning time 0-30 sec. adjustable
t16 Flame extinguishing check 5 sec.
t17 Leakage test, gas valve 2 30 sec.
*** Signal on terminal 1 clears the times t3, t4 and t5 at the end of t1 .
The leakage test, if integrated, runs although
**** For determination of the total safety periods according
to the standards, you have to add the reaction time of the
flame monitor to the time settings of the FMS (typ.1sec.).
M
1
3
5
5
6
9
2
7
3
7
1
7
2
7
5
8
7
7
4
6
7
4
8
6
8
5
8
2
8
3
8
4
8
8
8
9
9
2
9
0
9
3
9
1
8
7
P
re
-v
e
n
ti
la
ti
o
n
s
u
p
p
re
s
s
io
n
B
o
ile
r
s
a
fe
ty
i
n
te
rl
o
c
k
c
ir
c
u
it
G
a
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s
a
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i
n
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rl
o
c
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c
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c
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it
O
il
s
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i
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rl
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it
B
u
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p
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re
>
m
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.
G
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<
m
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.
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ig
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a
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a
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ir
d
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fa
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m
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c
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la
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o
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r/
R
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c
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la
ti
o
n
f
a
n
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n
it
io
n
t
ra
n
s
fo
rm
e
r
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n
it
io
n
v
a
lv
e
G
a
s
v
a
lv
e
1
(
g
a
s
l
in
e
)
O
il
v
a
lv
e
s
M
e
s
s
a
g
e
o
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o
p
e
ra
ti
o
n
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a
n
O
n
P
re
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e
n
ti
la
ti
o
n
/
p
o
s
t-
v
e
n
ti
la
ti
o
n
M
e
s
s
a
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g
a
s
o
p
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ra
ti
o
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F
a
u
lt
e
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te
rn
a
l
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n
it
io
n
g
a
s
l
e
a
d
h
e
a
te
d
o
il
d
is
tr
ib
u
ti
o
n
G
a
s
v
a
lv
e
2
(
b
u
rn
e
r
lin
e
)
*
**
**
*
Any condition
t1 Wait for Gas safety interlock circuit
air pressure monitor min. scan any
t2 Time for pressure build-up in the
gas test line 2 sec.
(only with leakage test activated)
t3 Servo drive running time
t4 Re-circulation damper delay 0-t5
t5 Aeration time 30-999 sec. adjustable
t6 Pre-ignition time 2-40 sec. adjustable
st
t7 1 safety period 4 sec.****
t8 Stabilisation period 3-10 sec. adjustable
* If output regulator in the unit is activated, this signal
is linked with the internal burner-start of this regulator
** If the re-circulation signal is absent, re-circulation valves remain
closed or run closed. (except at pre-ventilation)..
130
T
h
e
f
u
n
c
tio
n
s
e
le
c
tio
n
o
f
th
e
te
rm
in
a
l 7
is
s
e
t
b
y
p
a
ra
m
e
te
r
7
8
8
.
If
t
e
rm
.7
c
o
n
tr
o
ls
t
h
e
ig
n
iti
o
n
f
la
m
e
,
te
rm
.7
a
n
d
t
e
rm
.8
a
re
s
w
itc
h
e
d
t
o
lo
g
ic
a
l o
r
b
e
tw
e
e
n
t
6
t
o
t
9
.
t 1
3t
2t
t
4
5t
t 3
6t
7t
8t
9t
t 1
1
1
1
t
t 1
2
1
3
t
t 3
t 1
0
1
4
t
t 1
4
1
4
t
t 1
7
t 1
6
1
5
t
Version 4.0 8/99
x
x
x
