LG multi-zone mini split heat pump - part 2

My initial vacuum test purge was not good. I could not pull much of a vacuum and soon I realized I have many flare joint leaks despite I took time and care to make and tighten them. How I hunted down and corrected all of them is too complex for me to spend time to write.

LG multi-zone mini split heat pump - part 1

This is a job that I would not trust any professional HVAC people to select, design, and install. I want a cost effective way to heat and cool the cavernous barn. Unlike one for the main house it is designed to be undersized to make the place more comfortable while work is being done especially in cold winter.