MAHLE RTI TX200 - Manual (Page 8)

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Purge Chart
PURGING AIR FROM THE ERC CYLINDER
Refrigerant recovered into the ERC Cylinder may
also contain Air. This Air will increase the pressure
in the ERC Cylinder and slow recovery. Large
quantities of Air may even cause the TX200 to stop
recovering due to a High-Pressure-Shutdown.
Check the pressure in the ERC Cylinder to
determine the need to purge Air as follows:
Connect the High Side Gauge (on Gauge Manifold)
to the Vapor Valve of the ERC Cylinder. Determine
the ambient temperature and compare the gauge
pressure to the pressure shown in the Air Purge
Chart to the right.
If the ERC Cylinder pressure is greater, slowly open
the Gauge Manifold Valve and allow Air to slowly
escape until the pressure equals that shown in the
chart.
The above purge process can be performed
anytime during a recovery and while the ERC
Cylinder is still above ambient temperature after a
recovery procedure.
After the ERC Cylinder has cooled to ambient
temperature, the Air can be purged to the pressure
in a Standard Refrigerant Pressure/Temperature
Chart.
NOTE:
A High-Pressure-Shutdown can be detected by
noting that the Compressor-On Light goes OFF and
there is still positive pressure at the Inlet of the
TX200.
The Condenser Fan will continue to run and the
TX200 Compressor may cycle Off and On as the
Outlet Pressure rises and falls.