PRATIKA
User and Maintenance Guide Page 20/33
7.4 Manual mode RECOVERY operation
The aim of this operation is to recover and recycle all gas present in the A/C plant, separating it
from oil and other impurities present.
7.4/1 Preliminary operations
The operator should:
- switch on the vehicle engine with the bonnet closed for a few minutes.
- set the A/C plant ventilator to max. position. Let the vehicle engine idle (800-1200 rpm) for at
least ten/fifteen minutes to facilitate the flow of oil mixed with the refrigerant through the system,
and using the heating effect of the engine to eliminate micro-granules of frozen liquid that might still
be in the system when carrying out the recovery operation.
- during the recovery phase the vehicle engine should be switched off.
The cylinder can contain up to max. 10 kg, we therefore recommend checking the initial
amount of gas in the cylinder before beginning the recovery operation, thereby avoiding
interrupting the recovery process to empty excess gas. Always check before starting
operations the correct quantity of refrigerant.
On delivery the cylinder is obviously empty. When filling the cylinder for the first time, it is
necessary to connect the machine up to an outside cylinder to carry out a recovery
operation to provide for filling.
Remember that during the recharging operations a certain quantity of refrigerant will
remain in the connecting tubes. To completely empty the tubes follow the instructions
under the section End of work cycle.
For the type of oil to be used for injection in the refrigerant, please contact qualified
technical operators for information.
Never mix different types of lubricants. Always check beforehand the type of oil that
should be used in the different A/C plants (depending on the type of compressor
installed). C.T.R srl will be pleased to provide technical specifications.
