Technical data

7 Circuit Diagrams Thermo 230 / 231 / 300 / 301 / 350
706
Fig. 705 System Circuit Daimler Chrysler Citaro, Ident.-Nr. 67131
3
5
2
6
4
rt/ws
br
rt
M1
B4
A1
E1
U2
U1
SE
-
+
M
3
1
1
5
4
3
3
2
2
1
1
4
B2
Y1
ϑ
sw
A2
X1
A
D
H2
S3
S4
S1
B1
F1
F2
30
30
C
W1
31
31
D
4
3
2
1
A
6
5
4
3
2
1
DEUTSCH
2
4
ϑ
B3
2
1
1
32
7
61
61
rt/sw
sw
bl or
rt
br
X3
D+
FA K
BA
SP
F3
br
sw
X2
1
2
M2
M
6
7
6
5
Signal UP
UPFA
C
sw
sw
H1
F
X1
X3
X2
2
1
F
M1
A2
U1
A1
B1 Y1 E1
B2
B3/B5
1
1
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
1 Diagnostic connector
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
F1 Fuse 25 A flat fuse DIN 72581 part 3
F2 Fuse 25 A flat fuse DIN 72581 part 3
F3 Fuse 5 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
S3 Switch
external trigger circulation pump
S4 Switch power save operation
U1 Igniter box
Item Nomenclature Remark
U2 Igniter electrodes
W1 Wiring harness (1+2)
A Plug connections, 6-pole
C Plug connections, 1-pole
D Plug connections, 4-pole
F Plug connections, 2-pole
X1 Plug connections, 7-pole
X2 Plug connections, 2-pole
X3 Plug connections, 7-pole
bl
br
ge
gn
gr
or
rt
sw
vi
ws
Wire colors
blue
brown
yellow
green
gray
orange
red
black
violet
white