Air Conditioning System
Here are parts of a dealer installed Nissan AC that I pulled from my '77 280z
The compressor is a pump that pressurizes the gas. This heats the gas.
The condenser cools the high pressure gas and dissipates the heat and converts the gas to a liquid.
The drier acts as a reservoir that regulates the amount of coolant circulated.
The evaporator converts the liquid to a gas and absorbs heat from the incoming fresh air that blows through the compressor's fins.
Off/On and Temp. Control Switch