The freon’s heat is critical because the high-temperature refrigerant is so hot that the outside air will be cooler than the compressed refrigerant. The indoor coil absorbs the heat from inside your home versus pumping cold air into your home from outside. This is where it absorbs the heat from inside your house, and the refrigerant takes that heat back outside of your home. This high-pressure liquid refrigerant then travels through the suction line sets into the air handler’s indoor coil. Once your pump compresses the refrigerant vapor, it travels through the condenser coil and condenses the vapor refrigerant down into a liquid refrigerant. So your refrigerant and oils will naturally migrate to the warmer portion of the system. The heat transfer direction is from this higher temperature, high-pressure substance to a lower temperature, low-pressure substance, the lower temperature being the evaporator coil and the hotter temperature substance being the condenser. The pump is raising the pressures as well as increasing the heat. A high-pressure difference is needed for the refrigerant to flow correctly. The compressor increases the pressure of the refrigerant so that it reaches a pressure difference. The compressor is used to raise the temperature and pressure of the vapor refrigerant or gas, leaving the condensing coil through the discharge line.
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