Transcription of Product Data - Carrier
1 2021 CarrierForm 48LC-7-12-06PD Rev. A48LC Sizes 07-12 Packaged Rooftop Units with Gas Heat and Electric CoolingProduct DataWeatherExpert Gas Heat/Electric CoolingPackaged Rooftop Units6 to 10 Nominal Tons2 Carrier s new Gas Heat / ElectricCooling WeatherExpert 6 to 10 tonCommercial Package Rooftop modelsare designed to provide total low costof ownership by providing some of thehighest cooling efficiencies in theindustry with low installed costs, lowmaintenance costs, and high models focus on providing highIEERs (Integrated Energy EfficiencyRatios), which are a measurement ofcooling part load performance andwhere actual buildings operate nearlyall of the time.
2 These high part loadvalues are achieved by using logic thatstrategically sequences compressorstages, indoor fan motor, and con-denser fan motor speeds. These mod-els are in addition to the 3 to 5 tonmodels with SEERs up to to 23 ton models with IEERs upto to provide a full range high efficiencyWith IEERs up to , these newWeatherExpert models help to contrib-ute in LEED credits and help qualify forrebates. The high IEER efficiencies areachieved by utilizing a proven stagedcompressor design on a single refriger-ant circuit that provides three-stages ofcooling capacity control.
3 The indoorfan motors are high efficiency belt driveand controlled by a VFD (Variable Fre-quency Drive) that matches the cool-ing capacity stages for optimumcomfort and efficient heat is provided with efficienciesup to 82% and two stages of operationto better match building loads. Modelsalso have multiple heat capacities foreach size and use an induced draftcombustion to installAll WeatherExpert units have fullperimeter base rails with built in riggingcapability. They also are fully factorytested, refrigerant charged, and assem-bled at the factory for easy are easily field-convertible to hor-izontal air flow, which makes it easy toadjust to unexpected job-site complica-tions.
4 Many factory options and field-installed accessories are also availablethat are pre-engineered and to maintainEasy access door handles by Carrierprovide quick access to all normallyserviced components. Our no-strip screw system has superior holdingpower and guides screws into positionwhile preventing the screw from strip-ping the unit s metal. Units come withaccessible 2-inch filter that have a dedi-cated access door for easy replace-ment. Optional hinged panels alloweasy access with pull tabs and quarterturn conducts rigorous testing toensure your unit will perform asdesigned.
5 Extensive rain testing is con-ducted in special designed test areasand under conditions that simulateactual job sites. In addition, units areboth shake tested and driven aroundthe country to make sure both thepackaging and the unit componentswithin hold up. Condensate pans aremade of non corrosive compositematerial, motors are permanentlylubricated, and compressors use crank-case heaters, all to further strengthenthe unit s reliability. Three-stage cooling capacity controlwith staged scroll compressorsdesign. Each cooling stage is differ-ent in capacity output to bettermatch typical building load profiles.
6 Single refrigerant circuit design withprecision sized TXV refrigerantmetering devices to provide opti-mum operation through the entireoperating range. Single full faced evaporator coil forfull surface utilization, even at partload operation. Crankcase heater on each compres-sor designed to cycle off during theon cycle. IEER up to and EERs up High efficiency permanently lubri-cated belt driven evaporator-fanmotor with VFD (Variable Fre-quency Drive) controller. Electro-Mechanical Integrated StagingControl (ISC) board that provides:- Thermostat controls- Compressor staging- Indoor fan motor staging- Field and factory wiringconnections- Outdoor fan motor staging-Crank case heater control Sound levels as low as 82 db.
7 Exclusive non-corrosive compositecondensate pan in accordance withASHRAE 62 Standard, slopingdesign; side or bottom of contentsFeatures/Benefits.. 2 Model Number Nomenclature .. 4 AHRI Capacity Ratings .. 5 Physical data .. 7 Options and Accessories .. 10 Dimensions .. 14 Performance data .. 23 Fan data .. 40 Electrical data .. 48 Typical Wiring Diagrams .. 54 Sequence of Operation .. 62 Application data .. 67 Guide Specifications .. 68 Features/Benefits3 Multiple gas heat sizes with heatingefficiencies up to 82% and multiheat output per unit size. Induced draft combustion design.
8 Redundant gas valve, with up to2 stages of heating. Pre-painted exterior panels andprimer-coated interior panels testedto 500 hours salt spray protection. Fully insulated with foil faced insula-tion throughout the entire air streamof the cabinet. Exclusive IGC solid-state control foron-board diagnostics with LED errorcode designation, burner controllogic and energy saving indoor fanmotor delay. High ambient cooling operation andratings up to 125 F (52 C). Low ambient mechanical coolingoperation down to 40 F (4 C). Aneconomizer shall be the source ofcooling in low ambient temperatureconditions.
9 When the outside airtemperature is below 40 F (4 C), toreduce operating costs, mechanicalcooling shall not be utilized. Access panels with easy grip handles. Innovative, easy starting, no-stripscrew feature on unit access panels. Two-inch disposable return air filters. Tool-less filter access door. Field convertible airflow capabilityon all models. On 07 size, switchpanels within the units. On 08 to12 sizes, a simple field-installed sup-ply duct kit is required. Provisions for thru-the-bottompower entry capability as standard. Single point gas and electricconnections. Full perimeter base rail with built-inrigging adapters and fork truck slots.
10 24-volt control circuit protectedwith resettable circuit breaker. Totally enclosed high-efficiencyECM outdoor fan motor with per-manently lubricated bearings. Low-pressure switch and high-pres-sure switch protection. Solid-state electronic direct sparkignition system. Flame roll-out safety protector. High capacity liquid line filter drier. Factory-installed Humid-MiZer Adaptive Dehumidification Systemon all sizes Factory-installed SystemVu con-troller with LCD user display Standard Limited Parts Warranty:10 yr. aluminized heat exchanger,15 yr. stainless steel heat exchanger,5 yr.
