302
Thermo AC/DC
3 Assemblies and components
The heater is bolted down to the vehicle chassis or is
secured using an additional cross beam.
The heat is generated by the heating of heating cartridges
by means of electrical energy. The heating cartridges are
part of the heat exchanger and are therefore integrated
directly into the coolant circuit. As a result, the generated
heat can pass into the cooling circuit without loss.
The adaptation to the changing demand of heat is
reached by intermittent operation (intermittend mode).
In pronciple the heaters of the Thermo AC/DC series
consist of the main components:
•
HV Control head
•
Small distribution board
•
Heat exchanger
•
3, 6 or 9 heating cartridges
•
Temperature sensors
3.1
HV Control head
The HV control head consists of an aluminum die-cast
ring and the hood. Inside is the small distribution board.
The heat exchanger is screwed to the rear of the control
head.
3.2
Small distribution board
The small distribution board consists of a 35mm standard
rail on which the electrical components required for the
heater are mounted (see
and
The standard rail is attached to the heat exchanger by
means of stay bolts.
Fig.302 Example of a small distribution board of AC heaters (version with power supply unit)
Feed-through terminal blocks
Load contactor
AC-DC Converter
Fuse
Ground terminal block
Standard rail
terminal block
Summary of Contents for Thermo AC 070
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