MAHLE RTI RRC770 - Manual (Page 8)

RTI Technologies, Inc.
7 September 28, 1999 Page 7
... NOTE ...
As refrigerant is processed by the RRC770, temperature variations can
cause vapor to change to liquid which may temporarily settle in
various internal components.
If a known amount of refrigerant has been introduced into the RRC770
it may not all be seen in the Charging Cylinder Sight Glass.
This is normal and nothing to be concerned about. Refrigerant has not
been lost.
The sight glass does not indicate the amount of refrigerant
recovered. It is only accurate for determining the amount of
refrigerant charged out to the vehicle A/C System while in the Charge
Mode of operation.
! DO NOT TURN THE RRC770 OFF OR DISCONNECT HOSES !
A small quantity of Liquid refrigerant will probably still remain in the A/C
System. This can be detected by observing an increasing pressure reading
on the Low Side Gauge.
As pressure rises to a preset level, the RRC770 will automatically cycle
on to continue recovering refrigerant. Allow this automatic On/Off
sequence to repeat until the vacuum level remains constant for at least
2 minutes.
Note: Press and hold the top of the rocker switch marked PURGE AIR,
which will restart the recovery process to remove any residual
pressure that the RRC770 may not remove when used on cooler
days.
6. Close Red and Blue Hose Valves.
8. Press bottom (OFF) of rocker switch marked RECOVER/RECYCLE.
8. Press bottom (OFF) of rocker switch marked POWER ON/TEST.
INTERNAL CYLINDER FULL LIGHT:
This Light will illuminate if the Charging Cylinder Fills to capacity,
approximately 9 lbs. When this occurs, the Internal Cylinder must be drained
using the charging procedure outlined on Page 11 in order to continue
recovering refrigerant.