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Wire Up A Fridge Compressor [2012-03-12]


The Piston Compressor of a refrigerator is probably the most important part of a refrigerator. Honestly, all of the parts of a refrigerator are important. However, the Refrigerator Compressor is extremely important in terms of actually providing the cooling component to the refrigerator. Basically, the way it works is that the compressor takes the refrigerant gas and opts to compress it. This leads to an increase in the pressure of the refrigerant and the temperature in the refrigerator. Ultimately, this will contribute to the dissipation of heat. This, essentially, leads to the cooling of the system.
1 Unplug the refrigerator from the wall. Commercial refrigeration systems may require turning the electricity off at the circuit breaker box. The correct circuit breaker should read either kitchen or refrigeration.
2 Double-check the voltage at the refrigerator's terminal block with a multi-meter turned to AC Volts. Place a lead on each insulated terminal. The meter must read zero before continuing.
3 Identify the terminals on the Fridge Compressor. The identification tag, located on either the side of the compressor or stamped into the terminal cover, has three letters representing the terminal position. The terminal marked "C" stands for common, the terminal marked "R" stands for run and the terminal marked "S" stands for start.
4 Remove the terminal cover. Use a flat screwdriver to pry the cover out of the locking tabs.
5 Connect the wire coming from the capacitor or the start relay, if equipped, to the "S" terminal. A capacitor looks like a galvanized cylinder with wires coming from the top. One of these wires leads to the "common" side of the contactor. One wire leads to the compressor and if the capacitor has a third wire, it would lead to a fan. A start relay, shaped like a black box, connects to a capacitor. One wire of the relay connects to the compressor and one would either go to a run capacitor or the common side of the contactor.
6 Connect the wire coming from the common side of the contactor to the "C" terminal on the compressor. The contactor acts as a high voltage switch. The high voltage coming from the circuit breaker connects to one side of the contactor. When a low voltage signal, sent by a thermostat, tells the contactor to turn on, high voltage exits the contactor to feed electricity to the fans and the compressor.
7 Connect the wire coming from the hot side of the contactor to the "R" terminal. The contactor has two legs, one hot and one common.
If you want to know more,please enter the following link:Compressor Manufacturer.