DBW 160/230/300/350
Electrical connections
73
Item Description
Remarks
A B C D
A1
Heater
z
A2
Control modulet
SG 1553
z
4
Electronic Ignition unit
z
5
Thermostat
Control thermostat
z
7
Thermostat
Blower thermostat
{ { {
8
Thermostat
Overheat thermostat
z
10
Ignition electrodes
z
61.3 Supressor (2x)
Radio supression
{
A
Plug connection
Control module, 2-pin
z
B
Plug connection
Control module, 6-pin
z
B5
Thermostat
Nozzle preheating
{
C
Plug connection
Control module, 8-pin
z
F1
Overheat fuse
Polarity independent
z
F2
Fuse 8A
Vehicle fuse DIN 72581
{
F3
Fuse 8A
Vehicle fuse DIN 72581
{
F4
Fuse
Vehicle fuse DIN 72581
{
F5
Fuse
Vehicle fuse DIN 72581
z
F6
Fuse
Vehicle fuse DIN 72581
{
H1
Light, green
Operation indication
z
H2
Light,
circulating pump
If switched by S4
{
K1
Relay
Circulating pump; neg. ter-
minal of heater
K2
Relay
Heater motor
K3
Relay
Light, thermostat operation
control
K4
Relay
Electronic ignition unit
K5
Relay
Solenoid valve, flame sen-
sor
K6
Relay
Nozzle preheating
{
K7
Relay
Blower of vehicle heater
{
M1
Motor
Circulating pump
z
M2
Motor
Combustion air fan
z
M3
Motor
Combustion air fan
z
R
Flame sensor
Photoresistor, polarity inde-
pendent
z
R1
Resistor Motor
High power resistor
{
R2
Resistor,
heating cartridge
Nozzle preheating
z
S1
Switch
heater on/off
z
S3
Switch at water valve
Contact open, when water
valve is closed
{
S4
Switch
for on/offF,
Circulating pump separate
{
S6
Schalter
Switch for vehicle fan
z
X1
Plug connection, 2-pin
{
X2
Plug connection, 1-pin
{
X3
Plug connection, 2-pin
{
X5
Plug connection, 4-pin
{
Y1
Solenoid valve
Polarity independent
z
A
installed in the heater
B
supplied loose
C
only if required
D
provided in vehicle
z
included in standard kit
{
may be supplied depending on model
Item Description
Remarks
A B C D
Legend DBW 160