Electric Auxiliary Heater: Construction

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The electric auxiliary heater consists of 4 heating cells. Each heating cell contains 4 heating elements. The heating elements are grouped into pairs to form heating chains. A total of 8 heating chains can be selected in 8 heating levels. The regulator for the electric auxiliary heater is secured directly on the heating system heat exchanger with clamps). Regulator and heating system heat exchanger form a single unit.

The following illustrations show:

The construction of the electric auxiliary heater

Fig 1: Construction Of The Electric Auxiliary Heater
Courtesy of BMW OF NORTH AMERICA, INC.
The construction of a heating cell

Fig 2: Construction Of A Heating Cell
Courtesy of BMW OF NORTH AMERICA, INC.

The heating elements are held in place by a plastic frame and a tensioning spring.