Installing a new refrigerant line can be a complex process that requires careful planning and execution. Here are some general steps that may be involved in the installation of a new refrigerant line:

1. Determine the refrigerant type and line size: this will depend on the specific needs of your system, such as the size of the HVAC unit, the distance between the unit and the evaporator coil, and the amount of refrigerant required.

2. Plan the installation: this includes determining the best location for the line, mapping out the route of the line, and deciding where to place the line set, the refrigerant metering device, and the suction line accumulator.

3. Prepare the site: includes clearing away any obstacles or debris, creating a level surface for the installation.

4. Install the line: involves running the line from the HVAC unit to the evaporator coil, connecting the line set, and installing the various components.

5. Pressure test and vacuum the line: to ensure that there are no leaks or contaminants. Filling the line with nitrogen, applying pressure, and using a vacuum pump to remove any air and moisture.

6. Charge the system: adding the appropriate amount of refrigerant to the system while monitoring the pressure and temperature.

7. Test and commission the system: checking for leaks, ensuring that the pressure and temperature are within the proper range, and verifying that the system is delivering the desired cooling or heating capacity.

It's important to note that the installation process may vary depending on the specific requirements of your system and the local building codes and regulations.