Fiat 1998 Marea Weekend, Service Manual

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Auxiliary Units
Climate control
Marea-Marea Weekend
99 range
50.
SCROLL COMPRESSOR (engine 1242)
The compressor fitted on this version is the scroll type and has a system which deactivates it when the
temperature of the evaporator reaches levels where freezing might take place.
The compressor consists of a fixed casing (1) and an orbital casing (2); the movement of these two cas-
ings, achieved via the eccentric camshaft (3), connected to the pulley, creates a chamber whose volume
decreases during the rotation allowing compression.
The adoption of this compressor, consisting of two moving parts only, has led to the following advan-
tages:
- no gaskets are required;
- there are no leaks, either radial or axial;
- low wear losses due to the absence of internal pipes and valves;
- the wear of the spirals improves the seal at the sides of the actual coils;
- the absence of valves, knocking and impulses reduces noise levels.
1. Fixed casing
2. Orbital casing
3. Eccentric camshaft
4. Eccentric camshaft seal
5. Shield
6. Compressor supply electrical connection
7. Balancing mass
8
Print n" 506.763/17