Carrier 52S Architects And Engineers' Manual

Also see for 52S series: Service technician guide Installation, operating and maintenance instructions Installation, operating and maintenance instructions Installation instructions

Carrier 52S Architects And Engineers' Manual Manual pdf 41 page image

41PACKAGED TERMINAL COOLING UNITWITH HEAT PUMP OR ELECTRIC HEATINGHVAC Guide SpecificationsSize Range: Cooling: 7,100 to 13,700 BtuhHeating: 6,100 to 11,000 Btuh Heat Pump6,400 to 17,000 Btuh ElectricCarrier Model Numbers: 52SC CoolingOnly Unit52SE Unit withElectric Heat52SQ Heat PumpPart 1 — General1.01 SYSTEM DESCRIPTIONSingle piece, thru-the-wall electrically controlled unitusing hermetic rotary compressor for cooling and heatpump or electric resistance heat, as shown on the con-tract drawings.1.02 QUALITY ASSURANCEUnit shall be rated in accordance with ARI Standard310/380-93 and certified by UL and UL, Canada.1.03 DELIVERY, STORAGE, AND HANDLINGUnit shall be stored and handled per manufacturer’srecommendations.Part 2 — Products2.01 EQUIPMENTA. General:Factory-assembled, single-piece heating and/orcooling unit. Contained within the unit enclosureshall be compressor, coils, fans and fan motor, heat-ing means, controls, all wiring and piping, and afull refrigerant charge (R-22).B. Front Panel (supplied with unit) and Wall Sleeve:Wall sleeve and front panel shall be of plastic mate-rial. Front panel to have louvers in front surface.C. Fans and Motor:1. Evaporator (indoor) fan shall be a single-inletsquirrel cage blower with a corrosion-resistantfinish, discharging air upwards. Fan shall bedynamically balanced.2. Condenser (outdoor) fan shall be a propellertype with corrosion-resistant finish, discharg-ing air out the rear of the unit, and shall bedynamically balanced.3. Motor shall be totally enclosed, permanentlylubricated, and multiple speed.D. Compressor:The compressor shall be fully hermetic with inter-nal and external vibration isolation.E. Coils:The coils shall have aluminum plate fins mechani-cally bonded to seamless copper tubes internallyenhanced (grooved) with all joints brazed.F. Refrigerant Components:All piping, compressor, and expansion devices shallbe included.G. Controls and Safeties:1. Controls shall consist of pushbutton OFF/FAN/ HEAT/COOL adjustable thermostat withupper and lower limits, VENT OPEN/CLOSE,and FAN CYCLE switches. Additional con-trols for heat pumps include outdoor coildefrost thermostat.2. Safeties shall consist of automatic reset over-temperature and overcurrent protection forcompressor, inherent, automatic reset over-temperature protection for fan motor; twoovertemperature protectors for heater.H. Operating Characteristics:Unit shall be capable of starting and running at115 F ambient outdoor temperature per maximumload criteria of ARI Standard 310. Compressor withstandard controls shall be capable of operationdown to 25 F ambient outdoor temperature for heatpump and 55 F ambient outdoor temperature forcooling.I. Electrical Requirements:230/208-Volt: Shall be prewired with one plug touse with appropriate wall receptacle as specified onunit nameplate.265-Volt: Shall be hard-wired or cord-connectedthrough subbase.J. Filter:1. One-piece washable type that filters supply air.2. One-piece washable type filter in vent door fil-ters outdoor air.K. Corrosion Protection (CP):Corrosion Protection (CP), for coastal or corrosiveenvironments, prolongs the life of the product. Min-imum requirements are:1. All outdoor-exposed sheet metal parts shall becoated with a polyester thermostat powder coatpaint.2. Compressor and outdoor fan motor finish shallbe capable of withstanding 500 hours of saltspray testing per ASTM B-117.3. Compressor mounting screws shall be Serma-gard coated.4. Outdoor coil fin stock shall be coated and ableto withstand 1000 hours of salt spray testingper ASTM B-117.5. Outdoor coil tube sheets must be made of 316Lstainless steel.GUIDE SPECIFICATIONS