Saab 900 Service Manual page 26

S 7546
..........
,
.5
7
As it passes through the compressor, the heat- '
carrying vapour is pressurized and reaches a
temperature that is considerably higher than
that of the ambient air. The vapour proceeds to
the condenser where it gives up its heat and re-
turns to a liquid state (condenses). The conden-
sation (the condensed refrigerant) is filtered, de-
siccated and stored under pressure in the re-
ceiver. The expansion valve meters the refrige-
rant into the evaporator, whereupon the pressure
drops. This causes the refrigerant to boil (evapo-
rate).
•
Anga, Iflgtryck
Low pressure. vapor
Niederdruck. gasformig
Vapeur. basse pression
Vatska, Iflgtyck
Low pressure. liquid
Niederdruck. flussig
Liquide. basse pression
Saab900
9
Cirkulation diagram
1 Compressor
2 Condenser
3 Receiver shell
4 Expansion valve
5 Evaporator
6 Temperature-sensitive expansion valve body
7 Compensating hose
8 Anti-freezing thermostat
9 Temperature-sensitive anti-irostthermostat body
1
6
••••••
I
I
I
.., .' I
I
I
I
I
1J.
I
I
___.J
Anga. hiigtryck
High pressure. vapor
Hoctldruck. gasformig
Vapeur, haute pression
854-14 Heating and ventilation system, air conditioning system
Operating principle
The main components in the mechanical system
are the evaporator, compressor, condenser,
themostatic expansion valve, anti-frosting ther-
mostat and dryer receiver.
The refrigerant"·-abs'Orbs'
' + ;e' 8 ' t -
inside the
evaporator by· changing
from"a-~liquid
into a va.:.
pour. The air which flows 'over the"fins of the
evaporator is cooled and demoisturized.
Cycling clutch system as from the 1980
models
Vatska. hogtryck
High pressure. liquid
Hochdruck. flussig
Liquide. haute pression