Carrier 50HX024-060 Product Data
Also see for 50HX024: Installation, start-up, and operating instructions
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Guide specificationsPackaged Rooftop Air-to-Air Heat PumpConstant Volume ApplicationHVAC Guide SpecificationsSize Range: 2 to 5 Tons, Nominal (Cooling)23,800 to 57,000 Btuh (Heating)Carrier Model Number: 50HXPart 1 — General1.01 SYSTEM DESCRIPTIONOutdoor package, electrically controlled, air-to-air heatpump utilizing a scroll compressor for heating andcooling duty. Unit shall discharge supply air horizon-tally or vertically as shown on contract drawings.1.02 QUALITY ASSURANCEA. Unit shall be rated in accordance with ARI Standards210/240 and 270 latest revisions. Designed in ac-cordance with UL Standard 1995.B. Unit shall be designed to conform to ASHRAE 15.C. Unit shall be UL listed and UL, Canada, certified as atotal package for safety requirements.D. Insulation and adhesive shall meet NFPA 90A require-ments for flame spread and smoke generation.E. Unit shall be manufactured in a facility registered toISO 9002 (International Standards Organization) Manu-facturing quality standard.1.03 DELIVERY, STORAGE, AND HANDLINGUnit shall be stored and handled per manufacturer’srecommendations.Part 2 — Products2.01 EQUIPMENTA. General:Factory-assembled, single piece, air-to-air heat pump.Contained within the unit enclosure shall be all fac-tory wiring, piping, controls, and refrigerant charge(R-22).B. Unit Cabinet:1. Unit cabinet shall be constructed of phosphated,bonderized, zinc-coated, prepainted steel, capableof withstanding 500 hours in salt spray, FederalTest Method Std. No. 141 (Method 6061).2. Indoor fan compartment cabinet surfaces shallbe insulated with a minimum 1⁄ 2 in. thick, flexiblefiberglass insulation, coated on the air side, withaluminum foil-faced fiberglass insulation.3. Cabinet panels shall be easily removable forservicing.4. Unit shall have a factory-installed sloped, non-corrosive condensate drain.5. Unit insulation conforms to ASHRAE 62P.6. Unit shall have a single-piece top cover.C. Fans:1. Indoor Blower (Indoor Fan):a. Fan shall be 3-speed (sizes 024-042) or vari-able speed (sizes 048 and 060), direct driveas shown on the equipment drawings.b. Fan wheel shall be made from steel, be double-inlet type. It shall have forward-curved bladeswith a corrosion-resistant finish and shall bedynamically balanced.2. Outdoor fan shall be of the direct-driven propellertype with aluminum blades, riveted to corrosion-resistant steel spiders. It shall be dynamically bal-anced, and shall discharge air upwards andhorizontally.D. Scroll Compressor:Fully hermetic scroll type with internal and externalvibration isolation.E. Coils:1. Indoor and outdoor coils shall have aluminum-plate fins mechanically bonded to seamless cop-per tubes with all joints brazed.2. Tube sheet openings shall be belled to prevent tubewear.F. Refrigerant Components:Acutrol™ feed system.G. Controls and Safeties:1. Unit Controls:a. Unit shall be complete with self-contained low-voltage control circuit.b. Unit shall incorporate an outdoor-coil defrostsystem to prevent excessive frost accumula-tion during heating duty, and shall be con-trolled as follows:1) Defrost shall be initiated on the basis oftime and coil temperature.2) A 30/50/90 minute timer shall activatedefrost cycle only if coil temperature islow enough to indicate a heavy frostcondition.3) Defrost cycle shall terminate when de-frost thermostat is satisfied or shall havea positive termination time of 10 minutes.2. Safeties:a. Compressor, overtemperature, overcurrent.b. Refrigerant lines — strainer, loss-of-chargeswitch.27 |
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