Carrier PA17NA Installation Instructions Manual

Contents

7MAJOR COMPONENTS2--Stage CompressorThe 2--stage compressor contains motor windings that provide2--pole (3500 RPM) operation.Compressor Internal ReliefThe compressor is protected by an internal pressure relief (IPR)which relieves discharge gas into compressor shell whendifferential between suction and discharge pressures exceeds and550 -- 625 psi. The compressor is also protected by an internaloverload attached to motor windings.Compressor Control ContactorThe contactor has a 24 volt coil and is controlled by Y1 input fromthe thermostatHigh and Low Pressure SwitchesHigh and low pressure switches are provided in line with the Y1signal to the contactor for protection. The high pressure switchmounted on the liquid tube is set to open at 670 psi and higher, andthe low pressure switch mounted on the suction tube opens at apressure of 50 psi and lower.CARE AND MAINTENANCEFor continuing high performance and to minimize possibleequipment failure, periodic maintenance must be performed on thisequipment.Frequency of maintenance may vary depending upon geographicareas, such as coastal applications. See Owner’s Manual forinformation.PA17NA

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