Control Unit - Identification Of Terminals - Webasto DBW 2010 Service And Repair Manual

CIRCUIT DIAGRAMS
7.8 C U - I
ONTROL NIT
1
1
4
2
A B
Figure 33: Control Unit - Identification of Terminals
C B A
ONNECTOR LOCK
A1 (–) coolant circulating pump
A2 (+) coolant circulating pump
C B B
ONNECTOR LOCK
B1 (+) On/Off switch with low voltage protection
B2 (–) Battery negative
B3 (+) Control light (Operation indicator)
B4 (+) Battery positive
B5 (+) Optional coolant pump control input
B6 (–) Control light (Operation indicator)
Webasto Product N.A., Inc.
T
DENTIFICATION OF ERMINALS
1
2 3
5
6
5
C
DBW 2010/2020/300 COOLANT HEATERS
2
4
6 7 8
C B
ONNECTOR LOCK
C1 (+) To temperature control thermostat*
C2 (+) To Blower motor
C4 (+) To overheat fuse, temperature limiter and
fuel solenoid valve
C5 (–) For all heater components
C6 (–) Flame detector
C7 (+) From normally closed control thermostat
C8 (+) To ignition coil
* Control thermostat with white and orange wires.
Closes at 60 ± 5° C (140 ± 9° F)
Opens at 70 ± 3° C (158 ± 6° F)
* Control thermostat with red and green wires.
Closes at 68 ± 5° C (154 ± 9° F)
Opens at 75 ± 3° C (167 ± 6° F)
42
C
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