DBW 2010 / 2016 7 Circuit Diagrams
705
Legend Fig. 701 to Fig. 704:
Item Description Comment A B C D
1 Heater Not earthed
2 Control unit SG 1553
4 Ignition spark generator
5 Thermostat Control thermostat (internal)
7 Thermostat Fan thermostat
8 Thermostat Temperature limiter thermostat
10 Ignition electrodes
61.3 Interference suppression set (2x) Radio interference suppression
F1 Thermal fuse Independent of polarity
F2 20 A fuse Flat fuse SAE J 1284
F3 10 A fuse Flat fuse SAE J 1284
F4 Fuse Flat fuse SAE J 1284
F5 Fuse Flat fuse SAE J 1284
H1 Lamp, green Operation indicator
H2 Lamp, for circulation pump If operated via S4
K1 Relay Circulation pump; minus for heater
K2 Relay Heater motor
K3 Relay Lamp; operation of control thermostat
K4 Relay Ignition spark generator
K5 Relay Solenoid valve; flame monitor
K7 Relay Fan of vehicle heater
M1 Motor Circulation pump
M2 Motor Heater motor
M3 Motor Vehicle fan
R Flame monitor Photo resistor, Independent of polarity
S1 Switch for heater ON - OFF (starting current max. 2 A)
S3 Switch on water valve Contact open when water valve closed
S4 Switch For ON - OFF; circulation pump separate
S6 Switch Vehicle fan
X1 Plug connector 2-pin
X2 Plug connector 1-pin
X3 Plug connector 2-pin
Y1 Solenoid valve Independent of polarity
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