Actual Evacuation and Filling of R600a
1.Mounting of the filling hose with spherical valve - see fig. 7. Thereafter, evacuate.
2.Testing of the microscales with a weight.
3.Connect the refrigerant tank to the filling hose (16), and open the valve (9). Evacuate the filling hose and the manifold by opening the valve for the vacuum pump (12) and the vacuum gauge (10). After evacua- tion, close the valves (12 and 10). Fill the hose from the tank and the manifold with refrigerant by opening the refrigerant tank. Place the tank on the scales.
4.Set the scales at 0.
5.Open the refrigerant valve (9) and fill the system with refrigerant.
6.Then, close the valve for the manifold (9).
7.Start the compressor, and measure the suction pres- sure.
8.Close the valve on the drilling tongs (process valve) and close the process pipe using the tube joining system.
9.Pressure equalize the refrigerant hose by closing the refrigerant tank and by opening the manifold (9) and the vacuum pump (12).
10.Dismount the filling hose and open for the spherical valve (18). Blow through the filling hose. Close the valve (11). Dismount and blow through the hose for the re- frigerant tank (16) and filling station. Then, check if there is any refrigerant around the mouth of the outlet hose.
19.
