Modern air-cond doesn't need individual jacket copper pipe. Even the installation manual will tell you to wrap the supply line, return line, wire and drain in single insulation.

The air-cond pipe is small enough such that it can be flush with the pre-filled gas in new air-cond unit. Depends on model, the there is enough pre-filled gas for at least 10m of copper pipe. Beyond that you will need to top-up, and if copper pipe length is lesser then you have more than enough to flush the air out.

You can find this in the installation manual.