I01�High-voltage�Components
8.�Electric�Heating
138
8.2.�Operating�principle
Heating�for�the�passenger�compartment�in�the�standard�equipment
Index
Explanation
1
Heat�exchanger�in�the�passenger�compartment
2
Electric�heating
3
Electric�coolant�pump�(12 V)
4
Coolant�expansion�tank
The�coolant�is�heated�up�in�the�electric�heating�and�circulated�by�an�electric�coolant�pump�(20 W).
The�warm�coolant�flows�through�the�heat�exchanger�in�the�passenger�compartment�and�emits�the
heat.�The�warm�air�finally�reaches�the�passenger�compartment�by�means�of�a�blower.�The�refrigerant�is
conveyed�from�the�heat�exchanger�to�the�coolant�expansion�tank.
A�mixture�of�water�and�a�new�coolant�concentrate�called�"coolant�concentrate�i3"�is�used�as�a�coolant.
The�water�and�coolant�concentrate�are�mixed�in�the�ratio�50:50.
