Technical data

Thermo 230 / 231 / 300 / 301 / 350 7 Circuit Diagrams
709
Fig. 708 System Circuit MAN, Ident.-Nr. 89404
3
6
2
6
1
2
4
rt/ws
bl
br
sw
rt
C
M1
M2
H1
B4
A1
E1
U2
U1
SE
-
+
M
M
3
5
1
15
4
3
3
2
2
1
1
4
B2
Y1
ϑ
or
sw
A2
X1
A
X2
D
H2
S2
S3
S4
S1
B1
F1
F2
30
30
C
W1
W2
31
31
2
7
4
ϑ
B3
2
1
1
32
1
5
61
61
rt/sw
sw
bl
or
rt
br
X3
D+
LFAK
M
SP
2
1
F
D
4
3
2
1
F
M1
A2
U1
A1
B1 Y1 E1
B2
B3/B5
X1
1
2
3
4
5
8
7
7
X2
X3
A
1
2
3
4
5
A
A
6
5
4
3
2
1
DEUTSCH
1
1
Item Nomenclature Remark
A1 Heater not grounded
A2 Control unit SG 1572D
B1 Flame sensor observe polarity
B2 Temperature sensor polarity optional
B3 Temperature limiter
B4 Thermostat for nozzle preheating
E1 Heating cartridge for nozzle preheating
F2 Fuse 25 A flat fuse DIN 72581 part 3
F3 Fuse 25 A flat fuse DIN 72581 part 3
H1 Light operation indicator light
H2 Light flame indicator
M1 Motor combustion air fan
M2 Motor circulation pump
S1 Switch on / off
S2 Continuity switch on water cock
S3 Switch, external trigger
circulation pump
required, if S2 not installed
S4 Switch power save operation
Item Nomenclature Remark
U1 Igniter box
U2 Igniter electrodes
W1 Wiring harness (1)
W2 Wiring harness (2)
A Plug connections, 6-pole
C Plug connections, 1-pole
D Plug connections, 4-pole
F Plug connections, 2-pole
X1 Plug connections, 6-pole
X2 Plug connections, 2-pole
X3 Plug connections, 8-pole
Y1 Solenoid valve
1 Diagnostic connector
Wire gauges
< 7,5 m 7,5 - 15 m
0,75 mm
2
1,0 mm
2
1,5 mm
2
2,0 mm
2
4,0 mm
2
1,5 mm
2
1,5 mm
2
2,5 mm
2
? mm
2
6,0 mm
2
2,5 mm
2
4,0 mm
2
bl
br
ge
gn
gr
or
rt
sw
vi
ws
Wire colors
blue
brown
yellow
green
gray
orange
red
black
violet
white