Product Data WeatherMaster Single Packaged Rooftop

1 2021 Carrier Form 48/50GC-4-6-02PD Rev. D48/50GC**04, 05, 0648GC: Single -Package Gas Heating/Electric Cooling Rooftop Units 50GC: Electric Cooling Rooftop Units with Optional Electric Heatwith Puron Refrigerant (R-410A) Product DataWeatherMaster Single Packaged Rooftop3 to 5 Nominal Tons2 The New Carrier WeatherMaster Rooftop units (RTU) with EcoBlue Technology were designed by customers for customers and integrate new technology to provide value added benefits never seen in this type of equipment major design features include: Patent pending, Industry s first effi-cient indoor fan system using VaneAxial Fan technology with electriccommutated variable speed motor. Reliable two stage scroll compressoron all sizes. Upgraded unit control board withintuitive indoor fan adjustment. Reliable copper tube/aluminum fincondenser coil with 5/16-in. tubingto help reduce refrigerant chargeverses prior designs.

2 New outdoor fan system with rug-ged lightweight high impact com-posite fan blade48/50GC WeatherMaster units up to5 tons are specifically designed to fit onCarrier roof curbs that were installedback to 1989, which makes replace-ment easy and eliminates the need forcurb adapters or changing stage cooling capacity controldelivers SEERs up All models arecapable of either vertical or Carrier Rooftop unit (RTU) wasdesigned by customers for no-strip screw collars, handledaccess panels, and more, the unit iseasy to install, easy to maintain, andeasy to use. Your new 3 to 5 tonWeatherMaster Carrier Rooftop unit(RTU) provides optimum comfort andcontrol from a Packaged features include: optional Humidi-MiZer adaptivedehumidification system forimproved part load humidityperformance Puron refrigerant (R-410A) Single point gas and electricalconnections optional fully integrated SystemVu controls RTU Open controller for BACnet1,LonWorks2, Modbus3 and JohnsonControls N2 optional fully insulated cabinet withoptional foil faced insulation TXV refrigerant metering system Scroll compressors with internalline-break overload protection Units come with an easy accesstool-less filter door.

3 Filter track tiltsout for filter removal and replace-ment. All filters are the same size ineach easeAll WeatherMaster units are field-con-vertible to horizontal airflow, whichmakes it easy to adjust to unexpectedjob-site complications. Lighter unitsmake for easy replacement. Simple,fast plug-in connections to the standardintegrated unit control board (UCB).Clearly labeled connections points toreduce installation time. Also, a largecontrol box provides room to work androom to mount Carrier to maintainWith the new EcoBlue Vane Axial fansystem and direct drive ECM motor there is no longer a need to adjust beltsor pulleys as in past designs. This freesup maintenance and installation access handles by Carrier providequick and easy 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 , corrosion resistant compositedrain pan sheds water; and won t to useThe newly re-designed Unit ControlBoard by Carrier puts all connectionsand troubleshooting points in one con-venient place.

4 Most low voltage con-nections are made to the same boardand make it easy to access it. Settingup the fan is simple by an intuitiveswitch and rotary dial rooftops have high and lowpressure switches, a filter drier, and2-in. filters BACnet is a registered trademark of ASHRAE (American Society of Heating, Re-frigerating and Air-Conditioning Engineers).2. LonWorks is a registered trademark of Echelon Modbus is a registered trademark of Schneider of contentsPageFeatures/Benefits .. 2 Model Number Nomenclature .. 4 Capacity Ratings .. 6 Physical Data .. 10 Options and Accessories .. 14 Base Unit Dimensions .. 19 Accessory Dimensions .. 25 Performance Data .. 26 Fan Data .. 40 Electrical Data .. 89 Typical Wiring Diagrams .. 115 Sequence of Operation .. 123 Application Data .. 126 Guide Specifications .. 128 Features/Benefits3 EcoBlue TechnologyDirect drive EcoBlue Technologyindoor fan system uses Vane Axial fandesign and electrically new Vane Axial design over pastbelt drive systems has 75% fewer mov-ing parts, uses up to 40% less energyand has no fan belts, blower bearingsand control and integrationCarrier controllers make connectingWeatherMaster rooftops into existingbuilding automation systems easy.

5 Theunits are compatible with conventionalthermostat controls, SystemVu con-trols and Carrier RTU Open multi-pro-tocol efficiency and flexibilityThe 48/50GC rooftops exceedASHRAE (American Society of Heat-ing, Refrigerating, and Air-Condition-ing Engineers) , IECC1(International Energy ConservationCode) IECC-2018 minimum convertible airflow All WeatherMaster 3 to 5 ton units arefield-convertible to horizontal airflow,which makes it easy to adjust to unex-pected controlCarrier s patented Humidi-MiZer adaptive dehumidification system is anall-inclusive factory-installed option ongas heating/electric cooling and elec-tric cooling/electric heat models. Thissystem provides reliable, flexible opera-tion to meet indoor part load sensibleand latent IECC is a registered trademark of the Inter-national Code Council, High EfficiencyOutdoor Fan Non-corrosive blade Balanced blade Efficient airflow collarVane Axial Indoor Fan Direct drive ECM Slow ramp up Phase loss protection No belts or pulleysEfficient Coils Round tube/plate fin Copper/Aluminum Special coating available New / -in.

6 Condenser tube Humidi-MiZer system availableCompression Fully hermitic scroll Internally protected Two-stage on all modelsCabinet Design Heavy gage base rails Large handled access panels Tool-less filter access door Replacement original fit designHeating Gas Heating Induced draft heat exchanger Multiple sizes available Efficient dimpled gas design Electric Heating Multiple sizes available Single point powerUnit controls Base unit controller Switch/dial fan setting Large terminal connections SystemVu option Large Display Quick LED status i-Vu , CCN, BACnet RTU Open option Multi-protocol controllerFeatures/Benefits (cont)448GC MODEL NUMBER NOMENCLATURE48 GCDM04A2A5 0A0A0 Cooling Tons04 - 3 ton05 - 4 ton06 - 5 ton1 Example:Position:234567891011 12 13 14 15 161718 Heat OptionsD = Low Gas HeatE = Medium Gas HeatF = High Gas HeatL = Low NOx Low Gas Heat*S = Low Heat w/ Stainless Steel ExchangerR = Medium Heat w/ Stainless Steel ExchangerT = High Heat w/ Stainless Steel Exchanger * Low NOx models include Stainless Steel HX Sensor OptionsA = NoneB = RA (Return Air) Smoke DetectorC = SA (Supply Air) Smoke DetectorD = RA + SA Smoke DetectorE = CO2F = RA Smoke Detector and CO2G = SA Smoke Detector and CO2H = RA + SA Smoke Detector and CO2J = Condensate Overflow Switch (electro-mechanical controls only)

7 K = Condensate Overflow Switch and RA Smoke DetectorL = Condensate Overflow Switch and RA and SA Smoke DetectorsM = Condensate Overflow Switch and SA Smoke DetectorIndoor Fan Options1 = Direct Drive EcoBlue - Standard Static 2 = Direct Drive EcoBlue - Medium Static3 = Direct Drive EcoBlue - High StaticCoil Options - Round Tube/Plate Fin Condenser Coil (Outdoor - Indoor - Hail Guard)A = Al/Cu - Al/CuB = Precoat Al/Cu - Al/CuC = E-coat Al/Cu - Al/CuD = E-coat Al/Cu - E-coat Al/CuE = Cu/Cu - Al/CuF = Cu/Cu - Cu/CuM = Al/Cu - Al/Cu Louvered Hail GuardN = Precoat Al/Cu - Al/Cu Louvered Hail GuardP = E-coat Al/Cu - Al/Cu Louvered Hail GuardQ = E-coat Al/Cu - E-coat Al/Cu Louvered Hail GuardR = Cu/Cu - Al/Cu Louvered Hail GuardS = Cu/Cu - Cu/Cu Louvered Hail GuardVoltage1 = 575/3/603 = 208-230/1/605 = 208-230/3/606 = 460/3/60 Design Revision = Factory Design Revision Base Unit Controls0 = Electro-mechanical Controls - can be used with field-installed W7212 EconoMi$er IV (Non-Fault Detection and Diagnostic)2 = RTU Open Multi-Protocol Controller3 = SystemVu Controls6 = Electro-mechanical Controls - can be used with W7220 EconoMi$er X (with Fault Detection and Diagnostic)

8 Intake / Exhaust OptionsA = NoneB = Temperature Economizer w/ Barometric ReliefF = Enthalpy Economizer w/ Barometric ReliefU = Temperature Ultra Low Leak Economizer w/ Barometric ReliefW = Enthalpy Ultra Low Leak Economizer w/ Barometric ReliefService Options0 = None1 = Unpowered Convenience Outlet2 = Powered Convenience Outlet3 = Hinged Access Panels4 = Hinged Access Panels and Unpowered Convenience Outlet5 = Hinged Panels and Powered Convenience Outlet6 = MERV 8 FiltersC = Foil Faced InsulationFactory Assigned0 = Standard1 = LTLE lectrical Options A = NoneB = HACR BreakerC = Non-Fused Disconnect (NFD)D = Thru-The-Base (TTB) ConnectionsF = Non-Fused Disconnect and TTBN = Phase Monitor ProtectionP = Phase Monitor and HACRQ = Phase Monitor and NFDR = Phase Monitor and TTBS = Phase Monitor and HACR and TTBT = Phase Monitor and NFD and TTBR efrig.

9 Systems OptionsM = Two Stage CoolingN = Two Stage Cooling with Humidi-MiZer system (includes Low Ambient control)P = Two Stage Cooling with Low Ambient controlNote: On Single phase (-3 voltage code) models, the following are not available as a factory-installed option: - Humidi-MiZer System - Coated Coils or Cu Fin Coils - Louvered Hail Guards - Economizer - Powered 115 Volt Convenience Outlet Unit Heat Type48 - Gas Heat Packaged RooftopModel Series - WeatherMaster GC - SEER EfficiencyModel number nomenclature550GC MODEL NUMBER NOMENCLATURE 50GC M0 4 A1 A5 0A0A0 Cooling Tons04 - 3 ton05 - 4 ton06 - 5 ton1 Example:Position:234567891011 12 13 14 15 161718 Heat Options = No HeatA = Low Electric HeatB = Medium Electric HeatC = High Electric Heat Sensor OptionsA = NoneB = RA (Return Air) Smoke DetectorC = SA (Supply Air) Smoke DetectorD = RA + SA Smoke DetectorE = CO2F = RA Smoke Detector and CO2G = SA Smoke Detector and CO2H = RA + SA Smoke Detector and CO2J = Condensate Overflow SwitchK = Condensate Overflow Swtich and RA Smoke DetectorsL = Condensate Overflow Switch and RA and SA Smoke DetectorsM = Condensate Overflow Swtich and SA Smoke DetectorsIndoor Fan Options1 = Direct Drive EcoBlue Standard Static2 = Direct Drive EcoBlue Medium Static3 = Direct Drive EcoBlue High StaticCoil Options (RTPF) (Outdoor - Indoor - Hail Guard)

10 A = Al/Cu - Al/CuB = Precoat Al/Cu - Al/CuC = E-coat Al/Cu - Al/CuD = E-coat Al/Cu - E-coat Al/CuE = Cu/Cu - Al/CuF = Cu/Cu - Cu/CuM = Al/Cu - Al/Cu Louvered Hail GuardN = Precoat Al/Cu - Al/Cu Louvered Hail GuardP = E-coat Al/Cu - Al/Cu Louvered Hail GuardQ = E-coat Al/Cu - E-coat Al/Cu Louvered Hail GuardR = Cu/Cu - Al/Cu Louvered Hail GuardS = Cu/Cu - Cu/Cu Louvered Hail GuardVoltage1 = 575/3/603 = 208-230/1/605 = 208-230/3/606 = 460/3/60 Design Revision = Factory Design Revision Base Unit Controls0 = Electro-mechanical controls - can be used with field-installed W7212 EconoMi$er IV (Non-Fault Detection and Diagnostic)2 = RTU Open Multi-Protocol Controller3 = SystemVu Controller6 = Electro-mechanical - can be used with W7220 EconoMi$er X (with Fault Detection and Diagnostic)Intake / Exhaust OptionsA = NoneB = Temperature Economizer w/ Barometric ReliefF = Enthalpy Economizer w/ Barometric ReliefU = Temperature Ultra Low Leak Economizer w/ Barometric ReliefW = Enthalpy Ultra Low Leak Economizer w/ Barometic ReliefService Options0 = None1 = Unpowered Convenience Outlet2 = Powered Convenience Outlet3 = Hinged Panels4 = Hinged Panels and Unpowered Convenience Outlet5 = Hinged Panels and Powered Convenience Outlet6 = MERV 8 FiltersC = Foil Faced InsulationFactory Assigned0 = Standard1 = LTLE lectrical Options A = NoneB = HACR BreakerC = Non-Fused Disconnect (NFD)D = Thru-The-Base Connections (TTB)