Webasto DBW 2010 Service And Repair Manual

www.webasto.us 37 Webasto Product N.A., Inc.
DBW 2010/2020/300 COOLANT HEATERS CIRCUIT DIAGRAMS
7.3 DBW 2020 / 300 12 V AND 24 V - WITHOUT NOZZLE PREHEAT
Figure 28: Schematic - DBW 2020 / 300 Without Nozzle Preheat
BT BATTERY DS INDICATOR LIGHT E IGNITION ELECTRODES F1 FUSE 15A F2 FUSE 20A F3 FUSE 15A F4 OVERHEAT FUSE 138°C F5 FUSE 30A F6 FUSE 15A K1 RELAY (on / off switch) L1 SOLENOID VALVE L2 IGNITION COIL M1 COOLANT CIRCULATION PUMP M2 HEATER MOTOR R FLAME DETECTOR S1 ON / OFF SWITCH (heater) S3 CONTROL THERMOSTAT
(green and red wires)
S4 TEMPERATURE LIMITER
(green and green wires)
X1 9-PIN HARNESS CONNECTOR (round) X2 2-WAY CONNECTOR X3 2-WAY CONNECTOR
BROWN
BROWN
BROWN
REDRED RED
BT
E
F
G
J
C
B
A
S1
DS
F5
X1
H
WHITE
GREEN
RED
BLACK
WHITE
VIOLET
F4
t° t°
BLACK
BLUE
VIOLET
GREEN
GREEN
GREEN
RED
ORANGE
WHITE
BLACK
BLUE
GREEN
YELLOW
BROWN
BROWN
BROWN
BLACK
BLACK
GREEN
BROWN
ORANGE
GREEN
BROWN BROWN
BROWN
BROWN
BROWNBROWN
RED RED
BROWN
L1
R
L2
E
S4S3
M2
M1
A
B
C
C
A
B
M
1
2
4 1
3
6
5
2
52 17
4
68
65
3
4
2
1
+
–
CONTROL UNIT
HEATER
1 2
3
45
62
1
1 2
3
4
5
6
7
8
BROWN
M
BLUE BLACK
GREEN
2
1
K1
85 86
87
30
X2
F1
F2
F3
E
F CDAB
RED
BLUE
ORANGE
GREEN
RED
RED
F6
A
B
ORANGE
WHITE
D
X3

Webasto DBW 2010 Specifications

General

Brand	Webasto
Model	DBW 2010
Category	Water Heater
Language	English