Carrier 50JZ Product Data

Also see for 50JZ 024-060: Installation and operating instructions Guide to operating and maintaining Guide to operating and maintaining Product data Installation, Start-Up and Service Instructions

Contents

2compact, fully self-contained, heatpump unit that is pre-wired, pre-piped,and pre-charged for minimuminstallation expense. 50JZ units areavailable in a variety of standardcapacity ranges with voltage options tomeet residential and light commercialrequirements. Units install easily on arooftop or at ground-level.Durable, dependablecomponentsCompressors are designed for highefficiency. Each compressor ishermetically sealed againstcontamination to help promote longerlife and dependable operation.Vibration isolation provides quietoperation. Compressors have internalhigh-pressure and overcurrentprotection.Convertible duct configurationUnit is designed for easy use in eitherdownflow or horizontal applications.Each unit is easily converted fromhorizontal to downflow and includehorizontal duct covers.Direct-drive multi-speed, PSC(permanent split capacitor) blowermotor is standard on all 50JZ models.Direct-drive, PSC condenser-fanmotors are designed to help reduceenergy consumption and provide forcooling operation down to 40°F outdoortemperature. Motormaster® II lowambient kit is available as a field-installed accessory.Corporate thermostats designed towork as a system with Carrier’s smallpackaged product.Refrigerant system is designed toprovide dependability. Liquid refrigerantfilter driers are used to promote clean,unrestricted operation. Each unit leavesthe factory with a full Puron® refrigerantcharge. Refrigerant service connectionsmake checking operating pressureseasier.Indoor and Outdoor coils arecomputer-designed for optimum heattransfer and cooling efficiency. Theindoor coil is fabricated from coppertube and aluminum fins and is locatedinside the unit for protection againstdamage. The outdoor coil is internallymounted on the top tier of the unit.Copper fin coils and pre-coated fin coilsare available from the factory by specialorder. These coils are recommended inapplications where aluminum fins arelikely to be damaged due to corrosion.They are ideal for seacoast applications.High and Low Pressure Switches giveadded safety and reliability to thecompressor.Low sound ratings ensure a quietindoor and outdoor environment withsound ratings as low as 72 dB.(See page 3.)Easy to service cabinets provide easysingle-panel accessibility to serviceablecomponents during maintenance andinstallation. The basepan withintegrated drain pan provides easyground level installation with or withouta mounting pad. Convenient handholdsare provided to manipulate the unit onthe jobsite. A nesting feature ensures apositive basepan to roof curb seal whenthe unit is roof mounted. A convenient3/4-in. wide perimeter flange makesframe mounting on a rooftop easy.Louvered Grille provides hail andvandalism protection for the coil.Downflow operation is easily providedin the field to allow vertical ductworkconnections. The basepan utilizesknockout style seals on the bottomopenings to ensure a positive seal in thehorizontal airflow mode.Cabinets are constructed of heavy-duty, phosphated, zinc-coatedprepainted steel capable ofwithstanding 500 hrs of salt spray.Interior surfaces of the evaporator andelectric heater compartments areinsulated with cleanable semi-rigidinsulation board, which keeps theconditioned air from being affected bythe outdoor ambient temperature andprovides improved indoor air quality.(Conforms to American Society ofHeating, Refrigeration and AirConditioning Engineers No. 62P.) Thesloped drain pan minimizes standingwater in the drain, which is providedwith an external drain.Standard metal duct covers withinsulation come with the unit and coverthe horizontal duct openings. These canbe left in place if the units are convertedto downflow.Short-Cycling protection for thecompressor is incorporated into ourdefrost control board ensuring a fiveminute delay (+/-2 minutes) beforerestarting compressor after shutdownfor any reason.Table of contents PageFeatures/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-20Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23, 24Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-28Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30, 31