Y  This is the terminal for cooling or air conditioning and goes to the compressor relay. Typically a thermostat wire pull is made to the air handler on split systems and then this wire is spliced for the separate wire pull which is made to the condenser.
profound (comparative more profound, superlative most profound) 1  Descending far below the surface; opening or reaching to great depth; deep. 2  Very deep; very serious. 3  Intellectually deep; entering far into subjects; reaching to the bottom of a matter, or of a branch of learning; thorough a profound investigationâ. a profound scholarâ.
Clarity is the counterbalance of profound thoughts. Lynn Johnston: The most profound statements are often said in silence. Josh Brolin: My job in the movie is to be as anti-profound as possible. Michel de Montaigne: The most profound joy has more of gravity than of gaiety in it.