... recovery, regeneration, vacuum,filling(oil,refrigerant)and monitoring. Manually-operated Refrigerant Recovery and Filling Machine HS-520Connection:1/ ... R404a .Features: functions for recovery, regeneration, vacuum,filling(oil,refrigerant)and monitoring. large screen LCD display to ... refrigeration and A/C system below 5kg. special canned refrigerant connector for different users.Technical Data:working ...