MAHLE RTI TC670V - Manual (Page 12)

RTI Technologies, Inc.
February 5, 1996 Page 9
... NOTE
...
Several audible changes may be heard during the recovery and recycling
process.
Refrigerant flow through check valves causes a "sizzle-type" sound.
These changing "noises" are normal and nothing to be concerned about.
The TC670 will automatically recover and recycle refrigerant from the A/C System until a
vacuum is sensed. This vacuum level can be seen on the Low Side Gauge.
! ! ! ! DO NOT TURN THE TC670 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 increases to a preset level, the TC670 will automatically cycle on and off to
continue recovering refrigerant.
Allow this automatic sequence to repeat until the vacuum level remains constant for at least 2
minutes.
5. Close Red and Blue Hose Valves.
6. Close High and Low Gauge Valves.
7. Press bottom (OFF) of rocker switch marked RECOVER/RECYCLE.
PURGE REQUIRED OR CYLINDER FULL LIGHT:
This Light will illuminate if either...
1) The Charging Cylinder has filled to capacity: Go to Page 13
OR
2) Pressure on the Purge Gauge approaches 250 psig: Go to Page 10