Évaluations - 2, GPA: 3.5 ( )

Fabricant : Carrier Taille : 5.33 mb Nom Fichier : Langue d'enseignement:

NOTE: Units use 2 (low heat) or 3 (high heat) combustion fan motors rated at 0.3 FLA each. 56 Table 25 — Electrical Data — 48P2,P3,P4,P5100 Units with Optional Return Fan VOLTAGE 3 PH, 60 Hz VOLTAGE RANGE COMPRESSOR CONDENSER FAN MOTOR EVAPORATOR FAN MOTOR POWER EXHAUST POWER SUPPLY No. A1 No. B1 Min Max Qty RLA (ea) LRA (ea) Qty RLA (ea) LRA (ea) Qty FLA Hp FLA Qty Hp (ea) FLA (ea) MCA FUSE OR HACR BRKR* 460 414 508 3 23.1 150 3 26.9 179 6 3.3 (ea) 30 40.0 1 1 1 1 20 25 30 40 27.0 34.0 40.0 52.0 246.8 253.8 259.8 274.8 250 300 300 300 40 52.0 1 1 1 1 20 25 30 40 27.0 34.0 40.0 52.0 261.8 268.8 274.8 286.8 300 300 300 300 50 65.0 1 1 1 1 20 25 30 40 27.0 34.0 40.0 52.0 278.1 285.1 291.1 303.1 300 350 350 350 60 77.0 1 1 1 1 20 25 30 40 27.0 34.0 40.0 52.0 293.1 300.1 306.1 318.1 350 350 350 350 75 96.0 1 1 1 1 20 25 30 40 27.0 34.0 40.0 52.0 316.8 323.8 329.8 341.8 400 400 400 400 575 518 632 3 19.9 109 3 23.7 132 6 2.6 (ea) 30 32.0 1 1 1 1 20 25 30 40 22.0 27.0 32.0 41.0 208.4 213.4 218.4 229.7 225 225 250 250 40 41.0 1 1 1 1 20 25 30 40 22.0 27.0 32.0 41.0 219.7 224.7 229.7 238.7 250 250 250 250 50 52.0 1 1 1 1 20 25 30 40 22.0 27.0 32.0 41.0 233.4 238.4 243.4 252.4 250 250 250 300 60 62.0 1 1 1 1 20 25 30 40 22.0 27.0 32.0 41.0 245.9 250.9 255.9 264.9 300 300 300 300 75 77.0 1 1 1 1 20 25 30 40 22.0 27.0 32.0 41.0 264.7 269.7 274.7 283.7 300 300 350 350 LEGEND FLA — Full Load Amps HACR — Heating, Air Conditioning, and Refrigeration Hp — Nominal Horsepower LRA — Locked Rotor Amps MCA — Minimum Circuit Amps (for wire sizing) RLA — Rated Load Amps * Used to determine minimum disconnect per NEC (National Electrical Code). NOTE: Units use 2 (low heat) or 3 (high heat) combustion fan motors rated at 0.3 FLA each. 57 Step 13 — Connect Air Pressure Tubing — Before options such as the variable frequency drive (VFD) and/ormodulating power exhaust can operate properly, the pneumatictubing for pressure sensing must be installed. Use fire-retardantplenum tubing (field-supplied). All control devices use 1/4-in. tubing. Tubing must be run from the appropriate sensing location (in the duct or in the building space) to the control devicelocation in the unit. VARIABLE FREQUENCY DRIVE — The tubing for the duct pressure (DP) control option should sample supply ductpressure approximately 2/3 of the way out from the unit in themain trunk duct, at a location where a constant duct pressure isdesired. On these units, the duct pressure is sensed by a pressuretransducer. The pressure transducer output is directed to the unitcontrol module. On all sizes, the DP transducer is located in the unit auxiliary control box. See Fig. 44 and 45 for auxiliarycontrol box location. See Fig. 46-48 for auxiliary control boxdetails. Use a nominal 1/4-in. plastic tubing. Refer to appropriate base unit Controls and Troubleshootingbook for instructions on adjusting set points for duct pressurecontrols. MODULATING POWER EXHAUST — The tubing for thebuilding pressure (BP) control (achieved via the modulatingpower exhaust option) should sample building pressure in the AUXILIARY CONTROL BOX area near the entrance lobby (or other appropriate and sensitivelocation) so that location is controlled as closely to design pressures as possible. These units use a pressure transducer for sensing buildingpressure. The BP transducer is located in the unit auxiliary control box. See Fig. 44 and 45 for auxiliary control box location. See Fig. 46 and 47 for auxiliary control box details. Use a nominal 1/4-in. plastic tubing. For instructions on adjusting BP control set points, refer tothe Controls and Troubleshooting book. RETURN FAN POWER EXHAUST — The tubing for thebuilding pressure (BP) control (achieved via the return powerexhaust option) should sample building pressure in the areanear the entrance lobby (or other appropriate and sensitive location) so that location is controlled as closely to design pressures as possible. The units use a pressure transducer for sensing buildingpressure. The BP transducer is located in the unit auxiliary control box. See Fig. 45 for auxiliary control box location. SeeFig. 48 for auxiliary control box details. Use a nominal 1/4 in. plastic tubing. For instructions on adjusting BP control set points, refer tothe Controls and Troubleshooting book. Fig. 44 — Auxiliary Control Box Location (Sizes 030-050) 58 59 AUXILIARY CONTROL BOX BP DP OACFM TRANSDUCER FS DP OACFM TRANSDUCER BP FS Fig. 45 — Auxiliary Control Box Location (Sizes 055-100) LEGEND Fig. 46 — Auxiliary Control Box Details (Sizes 030-050) BP — Building Pressure Transducer DP — Duct Pressure Transducer FS — Filter Switch OACFM— Outdoor Air Cfm Sensor Transducer LEGEND Fig. 47 — Auxiliary Control Box Details (Sizes 055-100 without Optional Return Fan) BP — Building Pressure Transducer DP — Duct Pressure Transducer FS — Filter Switch OACFM— Outdoor Air Cfm Sensor Transducer FS BP OACFM TRANSDUCER PP SS LEGEND DP LEGEND DP RF CFM BP — Building Pressure OACFM — Outdoor Air Cfm T...

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