Initial start-up
Thermo E 200/320
56
If the heater functions normally the different operating states are passing according to the following functional diagram:
Bild 20: Functional diagram
States
Signals
Main switch
Off
On
Off
Coolant temperature
T > T_min T < T_min
T >= T_max
T < T_min
T >= T_max
T < T_min
F
la
m
e f
o
rm
at
io
n
F
la
m
e f
o
rm
at
io
n
F
la
m
e f
o
rm
at
io
n
Actuators
Operation indicator
Burner motor
Circulating pump
Electronic ignition unit
Solenoid valve
Time in seconds
12
1
0..15
5
...
30
90
12
1
0..15
5
...
30
90
12
1
0..15
5
...
30 90
Condition
Lo
ok f
or
Ini
tia
l c
yc
le w
ith
li
ght c
he
ck
P
re-
Ig
niti
on
Ign
iti
on
S
tabi
lizati
on
P
ur
g
e c
yc
le
1 wi
th s
afety
ti
me
Pu
rg
e cy
cl
e 2
Ini
tia
l c
yc
le w
ith
li
ght c
he
ck
P
re-
Ig
niti
on
Ign
iti
on
S
tabi
lizati
on
P
ur
g
e c
yc
le
1 wi
th s
afety
ti
me
Pu
rg
e cy
cl
e 2
Ini
tia
l c
yc
le w
ith
li
ght c
he
ck
P
re-
Ig
niti
on
Ign
iti
on
S
tabi
lizati
on
P
ur
g
e c
yc
le
1 wi
th s
afety
ti
me
Pu
rg
e cy
cl
e 2
OFF
Standby
Start
Heating
Purge
Cycle
Standby
Start
Heating
Purge
cycle
Standby
Start
Heating
Purge
Cycle
Off
Bar chart
