MAHLE RTI RHS900 - Manual (Page 3)

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Application
C:\RHS Computer Files\Instructions\RHS\GB\642-40\0012B-01.doc 1997.09.11
RHS 900
Your new RHS 900 station represents the latest in equipment for servicing air
conditioning units (A/C units). The station is designed for refrigerants R12 and
R134a. It can, and must, only be used for one of these refrigerants.
RHS 900 is a test, recovery/recycling-(draining/cleaning), evacuation, oil/ref-
rigerant charging station and is thus able to perform a total process cycle in
servicing A/C units for the automobile industry.
The recycling process is designed to follow SAE-standards J1989 and J2099 on
recycled refrigerant for A/C units.
The six processes - from test to charging - are performed by operating six
different process switches. This reduces the risk of error operation to a minimum.
After each evacuation, RHS 900 automatically performs a vacuum test and
indicates whether or not there is any leakage in the A/C unit. In addition, the
station incorporates an automatic process which ensures that subsequent processes
are performed fully automatically and in the correct sequence: evacuation,
vacuum test and refrigerant charging.
Constant monitoring ensures that the automatic process sequence does occur
correctly. Safety devices are built into the station to stop operation and indicate
faults in processes, e.g. excessively high pressure, overcharging of charging
cylinder.
During the recycling process a small quantity of oil is drained from the A/C unit.
On completion of the recovery process this quantity can be drained into a
measuring beaker. The same quantity of new oil must be filled into the A/C unit.
Refer to the A/C unit instructions and use only the type of oil specified.
The filter drier has a very high capacity (300 kg) and is easy to replace during
servicing.
A system built into the station ensures that non-condensable gases are automa-
tically blown off and that the discharge of refrigerant to the atmosphere is kept to
a minimum.
Before using RHS 900, read these instructions carefully to ensure that the pro-
cesses are performed correctly.