Star Mobile 1 Build

[DaveS53]

The trinary switch protects against over and under pressure conditions and turns the fan on before the condenser pressure gets too high. Protection against excessive compressor speed must come from some other source that monitors engine speed. You should have a fan relay that reacts to the engine temp sensor. The ground signal from the trinary switch should go to the same terminal on the fan relay. That way, only one relay is needed to control the fan.

If I had chrome plated accessories, I'd use stainless steel braided hose for the AC lines. I used them anywhere they show.