Room Capacitors
Capacitor service procedures depends on the type of capacitor. In all cases, heat transfer surfaces must be clean. This is true for surfaces in contact with the refrigerant for surfaces in contact with the cooling medium (air and water). Jet air or carbon dioxide (C02), can be used as a blowing agent. They are used for cleaning of the condenser or the drainage line.
There should be enough refrigerant vapor space (square) for the removal of heat from the steam. E.g. globe valves. Such valves should be installed in the system. One way to do this is to use the line tapping valve. Cm. Fig. 15-53. Larger units, as a rule, do not have two-way compressor service valves.
The state of the oil in the compressor is very important. It should be tested to determine its level of acid. In the presence of acids in the oil specifies the oil collapses. It reacts with moisture and refrigerant he contacted. This is usually caused by interruptions in the motor winding insulation, causing localized hot spots. Verification can be done by removing the oil sample and use of oil test kit. Cm. Fig. 15-54. If oil is acidic, the compressor should be carefully monitored.
Oil samples easily merge with serviceable hermehcs. Welded sealants, as a rule, require the dismantling of the compressor motor and drain the oil from the suction line opening. When replacing the engine compressors, always use the exact replacements.
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Industrial