Carrier 50TJ016-028 Installation, Start-up And Service Instructions Manual

Also see for 50TJ016: Installation, Start-Up and Service Instructions Installation instructions

Contents

10Table 2 — Electrical Data (cont)LEGEND*Heater capacity (kW) is based on heater voltage of 208 v, 240 v,380 v, 480 v, and 575 v. Heaters are rated at 240 v, 380 v, 480 v, or600 v. If power distribution voltage to unit varies from rated heatervoltage, heater kW will vary accordingly.†Fuse or HACR circuit breaker.**Heaters are field installed only.NOTES:1. In compliance with NEC requirements for multimotor and combi-nation load equipment (refer to NEC Articles 430 and 440), theovercurrent protective device for the unit shall be fuse or HACRbreaker. Canadian units may be fuse or circuit breaker.2. Unbalanced 3-Phase Supply VoltageNever operate a motor where a phase imbalance in supply volt-age is greater than 2%. Use the following formula to determinethe percent of voltage imbalance.% Voltage ImbalanceExample: Supply voltage is 460-3-60.AB = 452 vBC = 464 vAC = 455 v= 457Determine maximum deviation from average voltage.(AB) 457 – 452 = 5 v(BC) 464 – 457 = 7 v(AC) 457 – 455 = 2 vMaximum deviation is 7 v.Determine percent of voltage imbalance.% Voltage Imbalance = 100 x= 1.53%This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.3. MCA calculation for units with electric heaters over 50 kW =(1.25 x IFM amps) + (1.00 x heater FLA).UNIT50TJNOMINALVOLTAGE(3 Ph,60 Hz)VOLTAGERANGECOMPRESSOR OFM IFM POWEREXHAUSTELECTRICHEAT*POWERSUPPLYNo. 1 No. 2Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP†028(25 Tons)208/230 187 253 41.0 350 37.8 239 2 1 6.6 10.0 28.0/28.0— — — — 130/130 150/1504.6 18.8 — — 135/135 175/175— — 26/34 71/82 130/138 150/1504.6 18.8 26/34 71/82 135/143 175/175— — 42/56 117/135 181/170 200/1754.6 18.8 42/56 117/135 187/176 200/200— - 56/75** 156/180 191/215 200/2254.6 18.8 56/75** 156/180 197/221 200/225380 342 418 21.8 151 21.2 145 2 1 3.9 10.0 17.0— — — — 73 902.3 6.0 — — 76 90— — 20 30 73 902.3 6.0 20 30 76 90— — 35 52 87 902.3 6.0 35 52 90 90460 414 508 21.8 158 17.2 125 2 1 2.8 10.0 14.6— — — — 66 802.3 6.0 — — 68 80— — 32 39 67 802.3 6.0 32 39 70 80— — 55 66 84 902.3 6.0 55 66 87 100— — 80** 96 114 1252.3 6.0 80** 96 117 125575 518 633 17.3 125 12.4 80 2 1 3.4 10.0 13.0 — — — — 54 702.1 4.8 — — 56 70FLA — Full Load AmpsHACR — Heating, Air Conditioning and RefrigerationIFM — Indoor (Evaporator) Fan MotorLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP— Maximum Overcurrent ProtectionNEC — National Electrical CodeOFM — Outdoor (Condenser) Fan MotorRLA — Rated Load Amps= 100 x max voltage deviation from average voltageaverage voltageAverage Voltage = 452 + 464 + 4553= 13713IMPORTANT: If the supply voltage phase imbalance ismore than 2%, contact your local electric utility companyimmediately.7457