Product Data WeatherMaster Gas Heat/Electric Cooling ...

1 2022 CarrierForm 48HC-4-14-08PD Rev CProduct DataWeatherMaster Gas Heat/Electric CoolingPackaged rooftop Units3 to Nominal Tons48HC Sizes 04 to 14 packaged rooftop Units with Gas Heat and OptionalEnergyX Energy Recovery Ventilator2 Easy to install, maintain, and operate Carrier rooftop units are designed by customers for units up to tonsare specifically designed to fit on Carrierroof curbs that were installed since 1989,which makes replacement easy andeliminates the need for curb adapters orchanging utility units deliver SEERs(seasonal energy efficiency ratios) up , EERs (energy efficiency ratios) upto , and IEERs (integrated energyefficiency ratios) up to Two-stageunits deliver EERs up to , units withsingle-speed indoor motors deliver IEERsup to , and units with 2-speedindoor fan motor deliver IEERs up All models are capable of eithervertical or horizontal installation to meetnearly every light commercial Carrier rooftop unit (RTU) wasdesigned by customers, for no-strip screw collars, handledaccess panels, and more, the unit is easyto install, easy to maintain, and easy touse.

2 Your new 3 to tonWeatherMaster Carrier RTU providesoptimum comfort and control from apackaged features include: Optional EnergyX system withenergy recovery ventilator (ERV) Optional Humidi-MiZer adaptivedehumidification system for improvedpart load humidity performance Puron refrigerant (R-410A) Single point gas and electricalconnection Optional fully-integrated and easy touse ComfortLink controls RTU Open controller for BACnet1,LonWorks2, Modbus3 and JohnsonControls N2. Optional fully-insulated cabinet, withoptional foil-faced insulation High energy efficiency ratings may beeligible for local utility rebates (in mostterritories) TXV (thermostatic expansion valve)refrigerant metering system Scroll compressors with internalline-break overload protectionInstallation EaseAll WeatherMaster units are fieldconvertible to horizontal air flow,which makes it easy to adjust to unex-pected jobsite complications.

3 Lighterunits make for easy replacement. Unitshave simple, fast plug-in connectionsto the standard integrated terminalboard and clearly-labeled connectionpoints to reduce installation time. Also,a large control box provides room towork and room to mount Carrieraccessory to MaintainEasy 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 fromstripping the unit s to UseThe optimized central terminal boardby Carrier puts all connections andtroubleshooting points in oneconvenient place. Most low voltageconnections are made to the sameboard and make it easy to access rooftops have high and lowpressure switches, a filter drier, and2-in.

4 Filters standard. Our optional digi-tal controllers allow for seamless andsimple integration to the most complexbuilding network. Streamlined Control and IntegrationCarrier controllers make connectingWeatherMaster rooftops into existingbuilding automation systems easy. Theunits are compatible with conventionalthermostat controls, Carrier PremierLink communicating controls, ComfortLinkcontroller, and Carrier RTU Open multi-protocol controller interface with BACnet,Johnson Controls N2, LonWorks, or Mod-bus protocols. WeatherMaster rooftopsalso seamlessly integrate with Carrier build-ing system options, like the Carrier VVT (variable volume and temperature) zoningsystem or the Carrier i-Vu Building Auto-mation Efficiency and FlexibilityThe 48HC rooftops exceed ASHRAE(American Society of Heating, Refriger-ating, and Air-Conditioning Engineers) , IECC (International EnergyConservation Code) IECC-2015minimum efficiency Convertible Airflow (3 to ton)All WeatherMaster units are field con-vertible to horizontal air flow, whichmakes it easy to adjust to unexpectedjobsite complications.

5 Ton modelsrequire a simple supply air duct coverto field convert from factory vertical models are limited to verticalreturn but supply can be field Air Volume (SAV ) 2-Speed Indoor Fan Control System with VFD (Variable Frequency Drive)Optional SAV system utilizes a variablefrequency drive (VFD) to automaticallyadjust the indoor fan motor speedbetween operating modes. Availableon 2-stage Cooling models 07-14 withelectro-mechanical, ComfortLink, orRTU Open controls. 1. BACnet is a trademark of LonWorks is a registered trademark of Echelon Modbus is a registered trademark of Schneider of contentsPageFeatures/Benefits.. 2 Model Number Nomenclature .. 4 Capacity Ratings .. 5 Physical Data .. 10 Options and Accessories.. 17 Base unit Dimensions .. 23 Accessory Dimensions .. 49 Selection Procedures.

6 52 Performance Data .. 54 Fan Data .. 77 Typical Wiring Diagrams.. 96 Electrical Data .. 101 Sequence of operation .. 117 Application Data .. 120 Guide Specifications .. 1253 Comfort Control Carrier s patented Humidi-MiZeradaptive dehumidification system is anall-inclusive factory-installed option ongas heating/electric Cooling and elec-tric Heat/Electric Cooling models. Thissystem provides reliable, flexible opera-tion to meet indoor part load sensibleand latent Factory-Integrated Rotary Energy Recovery Ventilator (ERV)Carrier's EnergyX ERV system is an allinclusive factory-integrated and testedERV that provides a rotary completeenergy wheel ERV. The EnergyX sys-tem provides the capability tohold/transfer sensible and latentenergy from the exhaust airstream toimprove energy savings and increaseventilation without increasing heatingor Cooling requirements, therebyexpanding the envelope of operationon the 48 Series rooftop unit to meetyear-round comfort and energy condi-tions.

7 Designed with energy savings recovery wheels rotate betweenthe incoming outdoor airstream andthe building exhaust stream. As thewheel rotates, it transfers heat andmoisture from one airstream to theother. This pre-conditions the outdoorair, significantly reducing the capacityand energy needed from themechanical HVAC features: ComfortLink digital controls Up to 70-75% energy wheeleffectiveness AHRI 1060 certified energy wheel Robust insulated wheel design Silica desiccant-coated wheel mediafor enhanced moisture capabilities Removable wheel segments for easycleaning Single point unit power Optional wheel defrost control fornorthern climates Optional integrated bypasses forfree coolingAirXchange1 Energy Recovery CassetteUL certified, AHRI listed silica gelenthalpy desiccant wheels >25 are segmented for easy clean-ing, washable with detergent andwater, and have a 5-year standardlimited Performance Thermostatic expansion valve (TXV)

8 On each refrigerant circuit helps pro-vide optimum performance across theentire unit operating ExhaustTo aid in building pressure control,Carrier EnergyX systems include ECM(electronically commutated motor)power exhaust fans as standard. TheComfortLink controller integrates thepower exhaust into ERV operationwhile also ensuring precise buildingpressure ControlCarrier's EnergyX system provides theadded benefit of significantly raisingthe humidity level of incoming outdoorair in the winter and lowering thehumidity level of incoming outdoor airin the summer. This humidity controlcan eliminate additional equipmentrequirements, discomfort, and healthproblems and increase indoor airquality for a Adaptive Dehumidification SystemCarrier's Humidi-MiZer adaptive dehu-midification system is an all-inclusive,factory-installed option that can beordered with any WeatherMaster48HC 04-14 rooftop unit (with theexception of single-phase voltage208-230/1/60).

9 This system expandsthe envelope of operation of CarrierWeatherMaster rooftop products toprovide unprecedented flexibility thatwill meet year-round comfort is the next generationversion of Carrier's Humidi-MiZer sys-tem and includes modulating refrigerantvalves that provide variable flow bypassaround the condenser. This innovativefeature ensures exact control of thesupply-air temperature as the unit low-ers the evaporator temperature toincrease latent capacity. The Humidi-MiZer adaptive dehumidi-fication system has the industry's onlydual dehumidification mode WeatherMaster rooftop , coupledwith the Humidi-MiZer adaptive dehu-midification system, is capable ofoperating in normal design coolingmode, subcooling mode, and hot gasreheat the normal design Cooling mode, theunit will operate under the normalsequence of operation.

10 TheHumidi-MiZer system is inactive. In thesubcooling mode, the controller willcontrol the refrigeration system to sat-isfy Cooling and dehumidificationrequirements, as well as providing ade-quate reheat to maintain the desiredsupply-air gas reheat mode will operate whenthe space requires dehumidificationonly. The controller will control therefrigeration system to provide latentcapacity similar to that provided in thefull subcooling mode. In addition, it can increase hot dis-charge gas bypass to the Humidi-MiZercoil in order to heat the air to the exactneutral state required noover- Cooling or Special Seismic Certification48HC units are certified by OSHPD(Office of Statewide Health Planningand Development) Special SeismicCertification Pre-approval (OSP). OSPis a special seismic certification thatassures equipment shall maintain struc-tural integrity and functionality duringan earthquake.