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Fabricante : Carrier
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Arquivo Nome : 50yx-2pd.pdf
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'-.irA 's- Mt'«» Single-Package Heat Pump Units with the following Premium Features as Standard: • scroll compressors with internal high-pressure and overcurrent protection • thermostatic expansion valves • low-pressure switch • high efficiency operation Accessories: • single point box kit • electric heaters Featu res/Benefits Compact, fully self-contained, all-electric, combination heating/cooling unit is prewired, prepiped, and precharged for minimum installation expense. Easy installation Round side-by-side duct configuration on 018-042 units and rectangular configuration on 048-060 units. Models install easily on a rooftop or a ground-level pad. Efficient operation Rugged, efficient scroll compressors are specifically designed for high efficiency, improved reliability, and quiet operation. Each compressor is mounted on rubber isolators for additional sound reduction. All compressors have internal high-pressure, overtemperature, and overcurrent protection. These high efficiency units not only save electricity by lowering electric bills, they are also eligible for utility rebates offered for high efficiency units. Copyright 1992 Carrier Corporation Form 50YX-2PD Indoor-fan motors have been carefully selected to minimize energy-consumption and to withstand the heavy-duty, year-round operation required by heat pumps. These motors are designed to meet the requirements of a wide variety of residential and light commercial applications. Direct-drive, PSC (permanent split capacitor), outdoor-fan motors have been selected to help reduce energy consumption Units are designed for cooling operation down to 55 F Built-in reliability components include a low-pressure switch that stops the compressor if the refrigerant pressure drops to an unsafe operating level, a discharge thermostat on the compressor which protects against overheating, a thermostatic expansion value (TXV) which keeps liquid refrigerant from flooding into the compressor and ensures optimum performance under all conditions, and a compressor time-delay which prevents the compressor from attempting to restart for 5 minutes after shutdown, to allow for pressure equalization Indoor and outdoor coils are computer designed for optimum heat transfer Vertical outdoor-fan discharge carries sound and air up and away. The high-voltage inlet panel is designed to accommodate a field-installed electrical disconnect. A low-voltage terminal block simplifies thermostat connections. Refrigerant service connections make checking operating pressures easier Time/temperature defrost system is used to increase heating cycle efficiency. This type of defrost system has proven to be very reliable. The time/ temperature control “looks” for coil icing conditions only at preset time intervals, start the defrost cycle only if the defrost thermostat senses icing conditions, and automatically ends the defrost cycle when the coil has warmed sufficiently to melt the ice. A separate power supply is not required for electric heaters when an accessory single point box kit is used. This accessory provides for a single power supply for the packaged unit and accessory electric heater packages, and functions as an NEC (National Electrical Code) approved fused disconnect Weatherized cabinets are constructed of heavy-duty, phosphated, zinc-coated steel, and are finished with corrosion-resistant baked enamel Interior surfaces of the blower section are insulated to help keep the conditioned air from being affected by the outdoor ambient temperature Page Features/Benefits ....... . .......... 1,2 Model Number Nomenclature ... .... ......3 ARI Capacities . . .............. ............. . . 3 Physical Data . .......................................4 Accessories . . .... ... 4 Dimensions . . . ... ......5 Selection Procedure ........... ........................6 Performance Data . ....... . .......7-13 Electrical Data..................................................14,15 Controls . . .... ........................15 Typical Control Wiring Schematic............. . . 16 Typical Installation ... ... ... . .11 Guide Specifications ...................18,19 50YX 024 3 Model Number 50YX—High Efficiency Single-Package Heat Pumps V-Ph-Hz 3-208/230-1-60 Nominal Capacity 018 —1 1/2 Tons 024 — 2 Tons 030 — 2 1/2 Tons 036 — 3 Tons 042 — 3 1/2 Tons 048 — 4 Tons 060 — 5 Tons COOLING AND HEATING CAPACITIES AND EFFICIENCIES UNIT 50YX ......018 NOMINAL TONS STANDARD CFM NET COOLING* CAPACITIES AT 95 F (Btuh) SEER* NET HEATING* CAPACITIES AT 47 F (Btuh) ----- COP* AT 47 F NET HEATING* CAPACITIES AT 17 F (Btuh) “gJOO COP* AT 17 F ' 1.8 1 8 " ' 20 1.9 HSPF 70 SOUND RATINGSt (Bels) V/z 600 18,500 12 0 30 76 024 2 900 24,800 12 0 21,500 30 12,000 7.0 . _ _ 7 0 7.6 8.0 8.0 82 030 2Vz 1100 31,000 12 1 29,000 3 1 16,800 036 3 1300 35,800 120 34,000 3.0 19,000 042 31/2 1400 41,500 12.0 38,600 32 21,500 27,000 20 - go 70 048 4 1600 48,500 12.0 46,000 32 7...