1. Loosen and remove the service valve cap (located on the 3-way valve)
2. Connect the (low pressure) manifold hose to the service valve. Note: Connect the end of the hose that has the vent pin to the service valve.
3. Turn on the vacuum pump.
4. Loosen the smaller pipe flange nut (attached to the 2-way valve) and check for suction at the pipe end (suction made by vacuum pump). Note: If there is no suction: check manifold assembly (hoses / fittings / registers); if suction: Reconnect and tighten flange nut on 2-way valve. See torque value.
5. Process the vacuum to 1.3 kPa. This value is obtained from the manifold pressure gauge with closed registers and vacuum pump switched off. Note: If you do not reach the specified vacuum, check the quality of the pipe flanges and redo them if necessary.
6. Close the manifold registers and turn off the vacuum pump.
7. Remove the 2-way valve cap.
8. Open the valve ¼ turn (note: coolant noise)
9. Disconnect the service valve hose (located on the 3-way valve).
10. Replace the service valve cap and tighten.
11. Remove the 3-way valve cap.
12. Open the registry (the same) completely. Replace the cap and retighten.
13. Fully open the 2-way valve registration.
14. Replace the cover and retighten.
Moisture containing air in the refrigeration system may cause compressor failure. After connecting the tubing to the indoor and outdoor units, remove air and moisture from the cooling system using a vacuum pump.
