John,
Here is the most recent code update on working clearance.https://files.engineering.com/getfile.aspx?folder=e925c0da-0fd2-4586-9b89-a63ab6cc57b4&file=110.26_Working_space.JPG
in a full call for heat adjust lo/min dial. in a full call for cooling adjust hi/max dial.if direct acting adjust min/lo first,if reverse acting adjust hi/max first.
hope this help