Purge air - drain oil – MAHLE RTI Matco AC2880 User Manual
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Purge Chart
PURGE AIR - DRAIN OIL
IMPORTANT: Air must be purged and oil drained after each
recycle procedure. Failure to do so will cause excess air to
be introduced into the A/C during charge and the AC2880
will fill with excess oil causing serious operational
problems.
During automatic operation only, the AC2880 will stop after
the deep vacuum procedure and display PURGE AIR AND
DRAIN OIL as a reminder.
1. Turn on power.
2. Press the purge switch for five seconds.
3. Slowly open oil drain valve and drain oil into measuring cup.
Leave valve open and go to next step.
4. Measure the room temperature.
5. Find the corresponding pressure for this temperature on the
appropriate R12 or R134a purge chart.
6. Compare this pressure from the chart with that indicated on
the purge gauge on the side of the AC2880. If the gauge
shows a higher pressure, press the purge switch until the
pressure drops to the pressure shown in the chart.
7. Close oil drain valve.
8. Press the purge switch for five seconds to complete the
purge procedure.