[quote=Refrigerologist;96601]Many engineers' in this industry say "you should never adjust a TXV superheat setting as they are factory set".

This is correct and if you select the right size orifice no adjustment is required . Its all about knowledge and experience , however not everyone knows how to select the correct size orifice they then start messing with the t.e.v ?? why o why just leave them valves alone and get some training