The most expensive part in the condensing unit is a compressor. This heart is the pump that circulates the refrigerant as the heart is working with blood. A hermetic compressor the most common found in residential and light commercial air conditioning
and refrigeration systems. On Fig. 3-8 typical hermetic compressor is illustrated. They are sealed units and cannot be processed within the region. There are re-building shops that have the equipment to cut them open, replace defective parts in the cook shell back together. These compressors suction ventilation. This means that quite cold gas must return to the compressor, evaporator, to maintain the desired operating temperature of the compressor. The motor is sealed in the shell disks crankshaft and one or more pistons mutual work of the compressor. In case of sealed swivel type of compressor, fan, similar to those on water pump impeller blades on the oil pump the pump instead of pistons.
Located on the shell pieces of pipe, which were welded to the body, to give access to the high side and low side of the compressor.
There may be a small tubes that can be used to charge the system or install a pressure control. More pipes the low side, or on the suction side of the system. Smaller pipe pressure trunk, or hot gas line. These short pieces of pipes can be of steel or copper. In refrigeration piping soldered to it.
Hermetic compressors can be used in small achieve in refrigerators and designed for fractional HP (horsepower). They range from 1/14 to 60 tons of cooling capacity. Large tonnages used in commercial units. When making a decision you must have a compressor re-built, first check the price of a new one. Make sure that the condition of the rest of the condensing unit guarantees for investments, as big as a new compressor. If the condenser coil is rotten and the whole Cabinet is carried out jointly by the rust, the client may need to replace the whole thing. Good relationships with customers creates confidence in the technician.
