7 Circuit Diagrams
Thermo 230 / 231 / 300 / 301 / 350
702
Fig. 701 Automatic Control Circuit with Control Unit 1572 and Switch
3
3
5
1
1
5
6
2
2
6
1
2
4
4
4
3
3
2
2
1
1
4
F1
B2
Y1
br
gr
or
gn
ϑ
ϑ
rt/ws
bl
or
br
br
sw
rt
sw
A2
X1
A
X3
D
X2
C
K2
K1
M1
M2
H2
H1
B3
B4
S2
S3
S4
S1
A1
B1
E1
U2
U1
SE
-
+
M
M
M1
A2
U1
A1
B1 Y1
F1/B3
E1
B2
br
F3
F2
30
30
31
31
X3
8
7
6
5
4
3
2
1
2
1
X2
X1
1
3
5
2
4
6
D
C
A
6
5
4
3
2
1
1
bl
br
ge
gn
gr
or
rt
sw
vi
ws
Wire colors
blue
brown
yellow
green
gray
orange
red
black
violet
white
Wire gauges
< 7.5 m
7.5 - 15 m
0.75 mm
2
1.0 mm
2
1.5 mm
2
2.5 mm
2
4.0 mm
2
1.5 mm
2
1.5 mm
2
2.5 mm
2
4.0 mm
2
6.0 mm
2
Item
Nomenclature
Remark
S3
Switch, external trigger
circulation pump
S4
Switch
power save operation
U1
Igniter box
U2
Igniter electrodes
A
Plug connections, 6-pole
C
Plug connections, 1-pole
D
Plug connections, 4-pole
X1
Plug connections, 6-pole
X2
Plug connections, 2-pole
X3
Plug connections, 8-pole
Y1
Solenoid valve
1
Diagnostic connector
Item
Nomenclature
Remark
A1
Heater
not grounded
A2
Control unit
SG 1572
B1
Flame sensor
B2
Temperature sensor
B3
Temperature limiter
B4
Thermostat
open at T > 8 °C
E1
Heating cartridge
for nozzle preheating
F2
Fuse 25A
flat fuse SAE J 1284
F3
Fuse 25A
flat fuse SAE J 1284
H1
Light
operation indicator light
K1
Relay (in item A2)
for circulation pump
K2
Relay (in item A2)
for combustion air fan /
heating cartridge
M1
Motor
combustion air fan
M2
Motor
circulation pump
S1
Switch
on / off
S2
Continuity switch
on water cock
Содержание thermo 231
Страница 2: ......
Страница 10: ...1 Introduction Thermo 230 231 300 301 350 104 Page empty for notes...
Страница 26: ...4 Technical Data Thermo 230 231 300 301 350 404...
Страница 50: ...7 Circuit Diagrams Thermo 230 231 300 301 350 712...
Страница 72: ...10 Packaging Storage Shipping Thermo 230 231 300 301 350 1002 Page empty for notes...
Страница 73: ...Thermo 230 231 300 301 350 Annex A A 1 Annex A Scheduled Maintenance...