Carrier 50JZ Product Data

Also see for 50JZ 024-060: Installation and operating instructions Guide to operating and maintaining Guide to operating and maintaining Product data Installation, Start-Up and Service Instructions

Contents

22452 = 5 v457 = 7 v455 = 2 vLEGENDFLA — Full Load AmpsHACR — Heating, Air Conditioning and RefrigerationIFM — Indoor-Fan MotorLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP — Maximum Overcurrent Protection(fuses or HACR-type circuit breaker)NEC — National Electrical CodeOFM — Outdoor-Fan MotorRLA — Rated Load AmpsUL — Underwriters Laboratories* Single-Point Wiring Connections.† Dual-Point Wiring Connections.NOTES:1.2.In compliance with NEC requirements for multimotor andcombination load equipment (refer to NEC Articles 430 and440), the overcurrent protective device for the unit shall befuse or HACR breaker. The UL, Canada, units may be fuseor circuit breaker.Unbalanced 3-Phase supply VoltageNever operate a motor where a phase imbalance in supplyvoltage is greater than 2%. Use the following formula todetermine the percent of voltage imbalance.% Voltage imbalancemax voltage deviation from average voltage= 100 x average voltageEXAMPLE: Supply voltage is 460-3-60.AB = 452 vBC = 464 vAC = 455 v452 + 464 + 455Average Voltage = 31371= 3= 457Determine maximum deviation from average voltage.(AB) 457 -(BC) 464 -(AC) 457 -Maximum deviation is 7 v.Determine percent of voltage imbalance.7% Voltage Imbalance = 100 x 457= 1.53%This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.IMPORTANT: If the supply voltage phase imbalance ismore than 2%, contact your local electric utility companyimmediately.®