Purging air from the erc cylinder – MAHLE RTI TX200 User Manual
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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 Charts on the next page.
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.