Evaporator coil & Condenser
Evaporator Col Evaporator coils contain the system’s refrigerant as it converts from liquid to gas . The refrigerant moves through an expansion valve and into the evaporator cails . The liquid refrigerant moves through an expansion valve decreases pressure on the liquid refrigerant thus reducing by absorbing heat from the evaporator coil . Heat transfer occurs in these coils , creating a cold surface . The blower moves air across the cold surface . creating the conditioned air that cools your home . The gaseous refrigerant moves to the outdoor unit .
Condenser coils in the outdoor unit house the refrigerant during its return to liquid form . The compressor increases pressure on the gas , using it to condense into liquid As therefrigerant changes state , it release the heat it contains . The heat is dispersed into the air outside . The liquid refrigerant moves back inside for the cycle . to begin again .
There is really no difference between a Hot water coil and a Chilled water coil in construction . Hot water coils are usually 1 or 2 rows and chilled water coils are usually 3 to 12 rows deep . The vast majority of chilled water coils are constructed from either 1/2 ” OD tubes or 5/8 ” OD tubes.