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Thermo 90 S / Thermo 90 ST 8 Service work
803
Fig. 801 Specimen installations for heater in a truck
NOTE
The Thermo 90 S and Thermo 90 ST
heater is supplied with the control
unit mounted on the combustion air
fan.
With non-return valve and thermostat
Without non-return valve
1 Heat exchanger
vehicle heating
2 Switch for fan
of the vehicle heating
3 Relay for vehicle fan
4 Digital timer
5 Fuse strip in the car
6 Non-return valve with
leakage hole
7T-piece
8 Vehicle engine
9 Heater
10 Circulating pump
11 Water pump
12 Radiator
13 Regulating valve
14 Exhaust muffler
15 Metering pump
16 Combustion air intake line
17 Thermostat
18 Control unit (optional on the
Thermo 90 S)
19 Control unit (installation
position of Thermo 90 ST
and optionally
in
Thermo 90 S)
Wiring harness
Fuel line
Exhaust line
Coolant circuit