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.
Wiktionary(1.00 / 1 vote)Rate this definition: profound(Noun) The deep; the sea; the ocean. God in the fathomless profound Hath all this choice commanders drowned. Sandys. profound(Noun) An abyss. profound(Verb) To cause to sink deeply; to cause to dive or penetrate far down. profound(Verb) To dive deeply; to penetrate.