Circuit diagrams
Thermo 50
46
Item Designation
Comment
A1
Heater
Thermo 50
A2
Control unit
B2
Temperature sensor
E
Glow plug / flame monitor
F1
Fuse 15 A
Flat fuse SAE J 1284
F2
Fuse 5 A
Flat fuse SAE J 1284
F3
Fuse
Fuse same as vehicle fan fuse
(max. 20 A)
H1
LED (in item P)
Switch-on indicator
H2
LED (in item P)
Indicator
H3
Light (in item P)
Display light
H4
Light
Indicator
H5
Light min. 1.2 W
Switch-on indicator pumping device
K2
Relay
For pumping device
K3
Relay (in item A3)
Vehicle fan
M1
Motor
Combustion air fan
M2
Motor
Circulation pump
M3
Motor
Vehicle fan
P
Timer, digital
For programmed operation
S1
Switch for vehicle fan
S1 or S2 depending on vehicle
S2
Switch for vehicle fan
S1 or S2 depending on vehicle
S3
Switch
Immediate heat button
S4
1 or 2-pin
disconnecting switch
Emergency off switch,
electr. or pneumatic
S5
Switch
To pumping device 1
S6
Switch
To pumping device 2
S7
Momentary-contact switch Immediate heat button /
remote control
X1
6-pin plug connection
X2
2-pin plug connection
X3
2-pin plug connection
X4
2-pin plug connection
X5
2-pin plug connection
X6
2-pin plug connection
X8
2-pin plug connection
Diagnostics
X11
2-pin plug connection
X12 12-pin plug connection
Timer
X13 1-pin plug connection
Battery isolation switch
X14 1-pin plug connection
Auxiliary power take-off
X15 4-pin plug connection
On / off switch
Y1
Metering pump
Y2
Solenoid valve
for pumping device 1
Y3
Solenoid valve
for pumping device 2
Item Designation
Comment
Thermo50_02_gb_g.fm Seite 46 Dienstag, 27. Mai 2003 12:08 12
