Automatic Control Circuit With Control Unit 1572D And Standard Timer - Webasto Thermo 230 Workshop Manual

Thermo 230 / 300 / 350
58
75 (15)
61
30
F3
2
1 10 11
P
2
H4
8
H1
12 4
7
X4
M1 U1 B3/B5
A2 B1 Y1 E1
31
1 Diagnostic connector
2 Timer P:
with plus to connection 10 = continuous operating during immediate heating
terminal 10 not connected = duration of heating programmable (10 min to 120 min);
3 Pin assignment:
4 with connection to terminal 61 auxiliary
Item Nomenclature
A1 Heater
A2 Control unit
B1 Flame sensor
B2 Temperature sensor
B3 Temperature limiter
B4 Thermostat
B5 Thermostat
E1 Heating cartridge
F1 Fuse 5 A
F2 Fuse 25 A
F3 Fuse 25 A
H1 Light
H2 Light
H4 Symbol for "Heating" in Display symbol lighting (in item P)
M1 Motor
M2 Motor
P Standard timer (1531)
S3 Switch
Fig. 704 Automatic Control Circuit with Control Unit 1572D and Standard Timer
F1 F2
S4
X1
1
sw
5
or
S3
3
2,0 mm² rt/ws
4
2,0 mm² rt
2 2,0 mm² br
B2
6
bl
X2
1
A1
M2
M
2
2,0 mm² sw
Pin assignment 4wire lead
D1 0.75 gr
D2 0.75 or
D3 0.75 gn
D4 0.75 br
F1 not used
F2 not used
Remark
SG 1572D
observe polarity
polarity optional
for nozzle preheating
alternative to B3
for nozzle preheating
flat fuse DIN 72581 part 3
flat fuse DIN 72581 part 3
flat fuse DIN 72581 part 3
operation indicator light
flame indicator
combustion air fan
circulation pump
for timed operation
Ext. pump trigger
4
4
X3 5 6
3 3
3 3
W2
F
2 1
W1 A
5
1
3
4
2
6
C
B4
-
+
SE
U1
M
E1
U2
7wire lead
0.75 rt
0.75 or
0.75 bl
2.0 br
2.0 sw
2.0 rt/ws
Item Nomenclature
S4 Switch
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
X4 Plug connections, 12-pole
Y1 Solenoid valve
7 Circuit Diagrams
1
1
4 3 2
1
3 3 3 3
3 3 3 3
D
3 2 1 4
A2
B3
B5
M1
Y1 B2
B1
A1
Wire gauges
< 7.5 m
0.75 mm
2
1.0 mm
2
1.5 mm
2
2.5 mm
4.0 mm
Remark
power save operation
58 A
75 (15)
61 1
6
30
5 2
4
3
C
D
1
2
3
4
F
1
2
X1
1 2 3
4 5 6
X3
1 3 5 7
X2
1
2
2 4 6 8
3
H2
2
X4
1
1, 2, 3
4, 5, 6
4
7, 8, 9
7
9
10, 11, 1
31
Wire colors
bl blue
br brown
ge yellow
gn green
gr gray
or orange
7.5
2
rt red
1.
1.
sw black
2.
vi violet
4.
ws white
2
6
705