GENERAL INFORMATION
AIR CONDITIONING PRECAUTIONS
3
SERVICE PRECAUTIONS
CAUTION: Observe the following
precautions when handling components
used in the air conditioning system:
•
Air conditioning units must not be lifted by
their hoses, pipes or capillary lines.
•
Hoses and lines must not be subjected to any
twist or stress - the efficiency of the system
will be impaired by kinks or restrictions.
Ensure that hoses are correctly positioned
before tightening couplings, and ensure that
all clips and supports are utilised.
•
Flexible hoses should not be postioned close
to the exhaust manifold (less than 100mm)
unless protected by heat shielding.
•
Completed assemblies must be checked for
refrigeration lines touching metal panels. Any
direct contact of components and panels may
transmit noise and so must be eliminated.
•
The appropriate torque wrench must be used
when tightening refrigerant connections to
the stipulated value. An additional spanner
must be used to hold the union to prevent
twisting of the pipe when tightening
connections.
•
Before connecting any hose or pipe, ensure
that refrigerant oil is applied to the seat of the
new ’O’ ring seals, BUT NOT to the threads of
the connection.
•
All protective plugs must remain in place to
seal the component until immediately prior to
connection.
•
Ensure components are at room temperature
before uncapping, to prevent condensation of
moisture from the air that enters it.
•
Components must not remain uncapped for
longer than 15 minutes. In the event of a
delay, the caps must be fitted.
•
When disconnecting, immediately cap all air
conditioning pipes to prevent ingress of dirt
and moisture into the system.
•
The receiver/dryer contains desiccant which
absorbs moisture. It must be positively
sealed at all times. A receiver/drier that has
been left uncapped must not be used, fit a
new unit.
•
The receiver/drier should be the last
component connected to the system to
ensure optimum dehydration and maximum
moisture protection of the system.
•
Whenever the refrigerant system is opened,
the receiver/dryer must be renewed
immediately before evacuating and
recharging the system.
•
Use alcohol and a clean lint-free cloth to
clean dirty connections.
•
Ensure that all new parts fitted are marked for
use with R134a.
•
When a major repair has been completed, a
leak test should be conducted; refer to the air
conditioning section of this manual for the
correct procedure.