32 33 * Remarks 1. “A” area on chart : Stabilized running condition before stopping. 2. “B” area on chart : Transient running condition just after starting. 3. “C” area on chart : Compressor initial pull-down and restarting after defrost. 4. Motor Winding Temperature In case of LBP refrigerant system The motor winding temperature should not exceed 120℃(248℉) in the continuous operation and 130℃ (266℉) in the Pull-Down operation at the expected ambient temperature(43℃) In case of HBP refrigerant system The motor winding temperature should not exceed 120℃(248℉) in the continuous operation and 130℃(266℉) in the Pull-Down operation at the expected ambient temperature(26.7℃, 81℉) The limit motor winding temperature should not exceed 130℃(266℉) at the expected maximum ambient temperature(32.2℃, 90℉). If the temperature exceeds, the motor is overloaded, then it shortens the motor life. The winding temperature of the motor can be calculated by below equation. In case of HBP refrigerant system with R134a refrigerant gas T2 = (R2-R1)/R1*(K+T1)+T1 T1 : The room temperature at the beginning of the test T2 : The winding temperature(unknown) at the end of the test R1 : The resistance at the beginning of the test R2 : The resistance at the end of the test K : Temperature coefficient of resistance (Copper wire : 234.5, Aluminum wire : 225.0) for R134a refrigerant gas * Remarks 1. “A” area on chart : Stabilized running condition before stopping. 2. “B” area on chart : Transient running conditiona just after starting. 3. “C” area on chart : Compressor initial pull-down and restarting after defrost. Compressors under improper application can not achieve good performance and long-life reliability. This application guide provides the recommended handling techniques and requirements for application of SAMSUNG reciprocating compressor in order to help achieving good performance and long-life reliability. 1. Usable Refrigerant 2. Starting condition The LBP type compressors start at 85% of the nominal voltage. - Equalized pressure up to 70psig(4.9kgf/cm2g) for R134a LBP compressors. - Equalized pressure up to 40psig(2.8kgf/cm2g) for R600a LBP compressors. The HBP type compressors start at 90% of the nominal voltage. - Equalized pressure up to 90psig(6.3kgf/cm2g) for R134a HBP compressors. Depending on the operating condition and system characteristics, compressors can be started at lowervoltages. 3. Temperature and Pressure of cycle The refrigerant system must be used within the temperature and pressure range as below table. In case of LBP refrigerant system with R134a and R600a refrigerant gas for R134a refrigerant gas for R600a refrigerant gas LBP(Low Back Pressure) HBP(High Back Pressure) REFRIGERANT R134a R600a R134a Purity of 99.95% Min. Purity of 99.5% Min. Purity of 99.95% Min. Reciprocating Compressor Reciprocating Compressor APPLICATION GUIDE
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