Note: This procedure charges the air conditioning system with refrigerant in the liquid phase through the high-pressure service port. The refrigerant cylinder in this procedure must be installed with the valve facing down to supply refrigerant in the liquid state.
Caution: Never start the engine when charging the system through the high-pressure service port. Do not open the low-pressure service port valve of the measuring manifold when charging the system with refrigerant in a liquid state.
1. Close both manifold nipple valves tightly after the system has been evacuated.
2. Install the tap on the refrigerant filling cylinder as described in section "Preparing a refrigerant cylinder for the system filling procedure".
3. Open the high pressure valve fully and install the filling cylinder with the valve facing down.
4. Fill the air conditioning system with the nominal amount of refrigerant. Determine the amount of refrigerant charged by weighing the cylinder on a scale. Charging the refrigerant in excess of the norm will cause unacceptably high compressor supply pressure (in the high-pressure line). After charging, close the high-pressure valve.
- Amount of refrigerant: 680±25g
Note: If the low pressure gauge does not show the pressure in the system, the system is clogged (pipes are blocked) and repairs are required.
5. After filling the system with the nominal amount of refrigerant, close all valves of the measuring manifold.
6. Check the system for refrigerant leaks using a leak detector and repair any leaks found. (See section "Locating refrigerant leaks").
Note: To ensure quality work, it is recommended to perform an efficiency test of the air conditioner before disconnecting the measuring manifold from the system.
The text is taken from an online source: HyundaiBook.ru