Valeo Thermo E+ 120, Workshop Manual, Page: 9 / 65

301
Thermo E+ 120/200/320 3 Assemblies and components
3 Description of assemblies and
components
The heaters Valeo Thermo E+ 120, E+ 200 and E+ 320
are used in conjunction with the vehicle heating system
– to heat the passenger compartment
– to preheat water-cooled vehicle engines.
The 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.
The control device controls on the basis of the signals of
a temperature sensor the on and off switching of the
burner.
The heaters of the Thermo E+ series basically consist of
the main components:
– burner
– combustion chamber
– heat exchanger
External in the vehicle a circulation pump is installed or in
case of a compact device directly on the heater.
Fig. 301 Heater overview
1 Burner
2 Coolant, intake
3 Temperature sensors
4 Coolant, outlet
5 Heat exchanger
6 Exhaust outlet
7 Fuel, return
8 Combustion air,
intake
9 Fuel, supply
10 Splash guard
(grid alternative)
11 Grid
12 Intake air elbow incl.
adapter
(grid alternative)
1
2
3
4
5
6
7
8
9
10
12
11
Version for
an additional sensor