Saab 900 Service Manual page 41

Heating and ventilation system, air conditioning system ,854-29
Cars with AC
General directions for work on the AC
system
Precautions against moisture entering
the system, etc.
Any damage resulting in leaks in the system
must be remedied immediately, to prevent mois-
ture orforeign bodies entering the system. To re-
duce the risk of moisture entering the system
while work is in progress, it is vital that all com-
ponents be kept clean and dry. Always keep the
refrigeration oil in a sealed container to prevent
the oil absorbing moisture from the air.
Plugs used to blank off ports in new components
should not be removed until immediately before
the component is to be connected.
Ifthe car has been involved in a collision, a care-
ful inspection must be made of all components
that could have been damaged. Pay special at-
tention to soldered joints. Bent or cracked pipes
must always be replaced - never attempt to re-
pairthem. If it is suspected that dirt may have en-
tered a component, inspect and clean the com-
ponent thoroughly.
Desiccant inside the receiver
The receiver should be replaced if the system
has been open for more than five minutes. The
system is regarded as being open if any compo-
nent is uncapped.
Installation of a completely new system
The
compress~r
is charged with refrigeration oil.
No oil should be added to any other component.
Note
Whenever possible, the system should be
charged, immediately after fitting, to prevent
problems of corrosion arising. Further details are
given in the section dealing with charging of the
system.
Saab 900