Abstract: Apparatus for evacuating and charging a refrigeration unit having a compressor; a condenser; a receiver; an evaporator; hot gas, liquid and suction lines; and suction, discharge and liquid line service valves each having a service port position. A vacuum pump is provided which has first, second and third vacuum hoses respectively connected to the suction, discharge and liquid line service valves, with each vacuum hose having a controllable valve. Refrigerant supply apparatus is provided which is connected to the liquid line service valve.

Abstract: Methods and apparatus for evacuating and charging a refrigeration unit having a compressor; a condenser; a receiver; an evaporator; hot gas, liquid and suction lines; and suction, discharge and liquid line service valves each having a service port position. A vacuum pump is provided which has first, second and third vacuum hoses respectively connected to the suction, discharge and liquid line service valves, with each vacuum hose having a controllable valve. Refrigerant supply apparatus is provided which is connected to the liquid line service valve.

Abstract: A frame 50 having box section frame members 42 is connected by spider inserts 36 and 52 at the four corners of the frame which are linked through chains 34 to four frame handling devices 14 which include a pneumatic cylinder 16 operated to lower the frame to the horizontal 50B position in the tank with the cylinders 16 then being operated to tilt the frame in the tank about three different axes (FIGS. 5-7) to insure a complete coating of all the members of the frame and the purging of air from all entrapping cavities and/or corners of the frame.