301
Thermo plus 160/230/300/350 3 Assemblies and components
3 Description of assemblies and
components
The heaters Valeo Thermo plus 230, plus 300 and
plus 350 are used in conjunction with the vehicle heating
system
– to heat the passenger compartment
– to defrost the windows
– to preheat water-cooled vehicle engines.
The water heater operates independently from the vehicle
engine and is connected to the cooling system, the fuel
system and the electrical system of the vehicle. It is bolted
down to the vehicle chassis or is secured using an addi-
tional cross beam.
Heat is generated by combustion of liquid fuels. Via the
heat exchanger of the heater, the heat is dissipated to a
coolant circuit. The adaptation to the changing demand of
heat is reached by intermittent operation (intermittend
mode).
The control device controls on the basis of the signals of
a temperature sensor the on and off switching of the
burner.
Fig. 301 Heater overview
1
2
4
5
6
7
8
9
10
1 Burner head
2 Coolant, intake
3 Temperature sensors
4 Coolant, outlet
5 Heat exchanger
6 Exhaust outlet
7 Fuel, return
8 Combustion air, intake
11
9 Fuel, supply
10 Splashguard
(grid alternative)
11 Grid
12 Intake air elbow
incl. adapter
(grid alternative)
12
3
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