MAHLE RTI RHS730 (Rev A) - Manual (Page 8)

Page 7
WARNING
Failure to perform the Drain Oil procedure after
every recycle procedure will cause the RHS730 to
eventually fail.
Repair of the RHS730 to correct this problem is
not covered by warranty.
DRAIN RECOVERED OIL
Oil is separated from the recycled refrigerant and MUST be removed following EACH Recycle procedure to determine the
amount (if any) required to add into the A/C system as follows:
1. Turn Main Power Switch on. The display will show WEIGHT= XX.X LB AUTOMATIC? 5.
2. Press and hold the Oil Drain Re-pressurization Switch on the rear of the RHS730 for five seconds.
3. Slowly open the valve on the Oil Drain Bottle to drain any oil which may have been removed from the A/C System.
Unless the A/C System had previously been overfilled, the RHS730 will typically not remove enough oil to make
replenishment necessary.
4. Close the valve on the Oil Drain Bottle.
5. Press and hold the Oil Drain Re-pressurization Switch for five seconds. This allows any residual Non-Condensable
Gas to be re-circulated for reprocessing during the next recycle procedure.
Note: The Drain Recovered Oil procedure may be done while the RHS730 is performing the Deep Vacuum
procedure on the next page.
Manual Air Purge
The RHS730 purges air (also referred to as Non-Condensable Gas) automatically. There may be occasions where an extra
purge may be desired. One instance is when the Fill Charge Cylinder process seems slow. The following steps allow a
manual purge.
1. Turn Main Power Switch on. The display will show WEIGHT= XX.X LB AUTOMATIC? 5.
2. Slowly open the valve on the Oil Drain Bottle.
3. Press and hold the Oil Drain Re-pressurization Switch on the rear of the RHS730 for five seconds.
4. Close valve on the Oil Drain Bottle.
5. Press and hold the Oil Drain Re-pressurization Switch for five seconds.