603
Thermo G
6 Wiring diagrams
Position
Designation
BA
Operation indicator max. 1x5W or 2x2W
BM
Combustion air motor (in the heater)
ERH
Electrical regulator heating (gas press. regulator)
F1
Car flat-type fuse 20A acc. DIN 72581 part 3
F2
Car flat-type fuse 20A acc. DIN 72581 part 3
F3
Car flat-type fuse 5A acc. DIN 72581 part 3
F4
Car flat-type fuse 5A acc. DIN 72581 part 3
F5
Car flat-type fuse 5A acc. DIN 72581 part 3
HS
Main switch
MV1
High-press. solen. valve, 1st stage (gas regulator)
MV2
Low-press. solen. valve, 2nd stage (gas regula-
tor)
UP
Circulating pump
UPFA
Circulating pump external control
ZF-Modul
Electronic ignition module (in the heater)
Legend for the wiring diagrams
Connector
Description
C
To vehicle (Power)
C1
Terminal 30 (+)
C2
Terminal 31 (–)
C3
--
C4
UPFA
C5
Operation ind
C6
Main switch
C7
Terminal 30 UP
C8
Terminal 31 UP
P
Circulating pump
P1
Circulating pump +
P2
Circulating pump –
D
Diagnostic
D1
Dia
D2
Diagnostic-
D3
S-Bus
D4
--
V
Solenoid valves and electr.
gas regulator heating
V1
ERH+
V2
ERH -
V3
MV2+
V4
MV2 -
V5
MV1+
V6
MV1 -
Connector pin assignment
Cable colors
bl
br
ge
gn
gr
or
rt
sw
vi
ws
blue
brown
yellow
green
gray
orange
red
black
violet
white
2
4
8
7
5
3
1
6
1
2
1
2
3
4
5
6
3
1
4
2
