Product Data - Carrier

1 2021 CarrierForm 38AP-16PD Rev. A Product DataGemini Select Commercial Air-Cooled Condensing Units25 to 130 Nominal Tons(88 to 457 Nominal kW)38 APS025-065, 38 APD025-130 Commercial Air-Cooled Condensing Units with Puron Refrigerant (R-410A)50/60 Hz025 UNIT WITHLOW SOUND OPTION040-060 UNIT070 UNIT2 The 38AP condensing unit offers theutmost in system configuration andcontrol adaptability. Its premium-qual-ity standard components ensure dura-ble, efficient, and reliable dependable split systems matchCarrier s 40RU or 39 Series indoor-airhandlers with the versatile outdoor38AP condensing units for a wideselection of commercial cooling solu-tions.

2 Split condensing units compatiblewith ASHRAE Chlorine-free, non-ozone depletingPuron refrigerant (R-410A) Coil design flexibility - Microchanneland RTPF coil technology availableon all units 38 APS single-circuit unit has up to3 rotary scroll compressors 38 APD unit has up to 6 rotary scrollcompressors with 2 independentcircuits Standard scroll compressor unitsoperate as low as 33% (single cir-cuit) or 13% (dual circuit) of nominalcapacity Optional digital scroll compressorsallow incremental unloading downto 16% (single circuit) or 6% (dualcircuit) of nominal capacity for VAVapplications.

3 The digital scroll isalways on the lead circuit (one perunit) Protection against high dischargeand low suction refrigerant pres-sure, and low oil pressureThe 38AP units offer high unit EERs(Energy Efficiency Ratios) up to IPLVs (integrated part load values)up to units provide greater efficiencythan similar units in the marketplace,which translates into year-round oper-ating latest safety standards for 38 APunits are tested per UL (UnderwritersLaboratories) and CSA (CanadianStandards Association) standards andcertified by 38AP Series condensing units fea-ture up to 6 compressors and 2 refrig-erant circuits, and can be matched witha wide variety of air-handling units.

4 Sin-gle circuit condensing units can oper-ate with a single air handler. Dualcircuit condensing units can operatewith a single air handler or two sepa-rate air handlers. Standard units havemultiple scroll compressors. A digitalscroll option is available. This option ofdigital control closely matches buildingloads and allows fine incrementaladjustments to the variance in constructionAll 38AP units have weatherized cabi-nets constructed of heavy-duty galva-nized steel prepainted with corrosion-resistant baked enamel.

5 Inside and out-side surfaces are protected to ensurelong life and good appearance. Thedurable, galvanized steel, painted com-ponents shall withstand 1000 hours inconstant neutral salt spray underASTM B117 conditions with a 1mmscribe per ASTM D1654. After test,painted parts shall show no signs ofwrinkling or cracking, no loss of adhe-sion, no evidence of blistering, and themean creepage shall not exceed1/4-in. (Rating 4 per ASTM D1654)on either side of the scribe 38AP units are available with Nova-tion heat exchangers with microchan-nel coil technology.

6 The microchannelheat exchanger (MCHX) coils providelong-term reliability, high performanceheat transfer, and significant savings inrefrigerant charge. E-coated MCHX isoffered as an option for harsh industrialor coastal conditions. Painted partsshall withstand 1000 hours in constantneutral salt spray under ASTM B117conditions with a 1mm scribe perASTM D1654. After test, paintedparts shall show no signs of wrinklingor cracking, no loss of adhesion, noevidence of blistering, and the meancreepage shall not exceed 1/4 in.

7 (Rat-ing 4 per ASTM D1654) on eitherside of the scribe 38AP condensing units featurehighly reliable, hermetic scroll com-pressors. Each 38AP unit is capable ofunloading in staging sequence of scrollcompressors. Compressors aremounted on rails with vibration isola-tors to provide quiet operation andreduced component 38AP units have single or dualindependent circuits; they provideinherent backup capability. Each circuitis also protected by the following safetyfeatures.

8 Short-cycle protection Low superheat protection Loss of refrigerant charge protec-tion Reverse rotation protection Suction and discharge pressuretransducers High refrigerant pressure switch(discharge) Circuit breakers or fuses for shortcircuit protection of compressorsand outdoor fans Suction line accumulator for eachrefrigerant circuitEasier installation and serviceThe 38AP units are equipped withhinged control-box access doors, con-trol interface terminal boards, liquidline shutoff valves, and suction line ser-vice controls The ComfortLink controls communi-cate in plain English.

9 Making it as easyas possible to monitor and control eachGemini Select condensing unit whileaccurately maintaining air tempera-tures. The large scrolling marquee dis-play acts as a window into the unit soperation, providing easy-to-read infor-mation about chiller performance andover 15 diagnostic functions. Carrier s 38 Series condensing units ComfortLink controls provide featuressuch as supply air temperature reset,demand limit, 4 to 20 mA input com-pressor wear minimization and protec-tion, temperature and pressure displaysand diagnostic functions.

10 These con-trols result in higher chiller reliability,Features/BenefitsTable of contentsPageFeatures/Benefits ..2 Model Number Nomenclature ..4 Physical Data ..5 Options and Accessories..9 Dimensions ..12 Selection Procedure ..17 Performance data ..18 Typical Piping and Wiring..19 Electrical Data ..22 Controls ..30 Typical Control Wiring Schematics ..33 Application Data ..42 Guide Specifications ..493simplified training and more productiveservice calls with correspondingly loweroperational and maintenance s exclusive accessory handheldNavigator display provides conve-nience and powerful information in thepalm of your hand.