WeatherMaker® Applied Rooftop Units
48K

Standard Features

• Low global warming potential (GWP) Puron Advance™ refrigerant (R454B)
• Refrigerant leak detection system with dissipation control
• Uneven tandem scroll compressors for improved staging
• Galvanized steel condensate drain pan
• Single refrigerant circuit with fully active Al/Cu evaporator coil on 20-35 tons 
• Dual refrigerant circuit with intertwined Al/Cu evaporator coil on 40-60 tons 
• EXV metering devices for wide operating range 
• Large MCHX condenser coils for reduced refrigerant charge and efficient operation 
• Mechanical cooling from 50°F to 115°F ambient 
• Natural gas heater with induced draft combustion design and aluminized steel heat exchanger 
• Low or high heat capacities with two-stage control 
• Belt drive indoor fan system with forward curve blowers 
• Open drip proof (ODP) indoor fan motor with variable frequency drive (VFD) control for application flexibility
• Multiple fan motor size selections
• Pre-painted exterior panels and primer-coated interior panels tested to 500 hours salt spray protection 
• Fully insulated cabinet with fiberglass insulation 
• Manual outdoor air damper with outdoor air hoods 
• Dedicated 2” pre-evaporator filter rack with MERV 5 filter 
• Carrier SmartVu™ controls with 7” touchscreen display 
• Standard DXLAT, OAT, and RAT sensors 
• Multiple indoor fan control methods, including SAV, CV, SZ-VAV, multi-zone VAV duct pressure, or 3rd party input 
• UL listed for compliance with UL Standard 60335-2-40 
• Certified to AHRI Standard 340/360 
• 10kA short circuit current rating (SCCR)

Reliability Features

• SmartVu controls with system monitoring and alarming
• Liquid line filter drier to help protect refrigerant system
• DX high and low-pressure protection
• EXV metering devices optimize unit performance
• Standard crank case heaters

Installation Features

• Fits most legacy Carrier A & E curbs 
• Heavy duty base rail with lifting lugs for easy rigging 
• Dedicated supply and return configurations 
• Provisions for thru-the-bottom power and control wiring 
• Single point electric and gas connections 
• Terminal block power connection 
• Factory installed sensors for control operation

Maintenance Features

• Dedicated high and low voltage control sections 
• DX pressure and temperature sensors can be read from the SmartVu display, eliminating the need for external gauges 
• Hinged doors on frequently accessed sections, including controls, filters, evaporator, and indoor fan motor 
• Two-inch disposable return air filters with filter hook

Standard Limited Warranty

• 3-years parts only on MicroChannel condenser coil
• 5-years non pro-rated warranty on heat exchanger
• One year standard parts only

Factory-Installed Options

Gas Heat

• Stainless steel gas heat exchanger
• Low or high capacity multi-stage gas heat with stainless steel heat exchanger

Refrigerant Circuit

• Lead, variable capacity digital compressor 
• Low sound package includes shrouded, low sound condenser fans, low RPM motors, and sound blankets 
• Low ambient package includes variable speed condenser fans to allow mechanical cooling down to -20°F (-28°C) 
• High efficiency, low sound, low ambient package with Greenspeed® intelligence for improved part load efficiency, low ambient mechanical cooling, and low sound operation 
• Humidi-MiZer® adaptive dehumidification system with modulating control

Construction

• Double wall construction
• Double wall construction with Agion® anti-microbial coating 
• Double wall bottom for slab or dunnage mounted applications

Indoor Fan Motor

• Shaft grounding rings 
• VFD bypass 
• TEFC indoor fan motor

Condenser & Evaporator Coils

• E-Coat MCHX Condenser 
• E-Coat Al/Cu Evaporator 
• Stainless Steel Drain Pan

Controls

• Humidity and enthalpy sensing (OARH & RARH) for dehumidification or free cooling control 
• Return air CO₂ sensor for ventilation control

Outdoor Air & Relief

• Ultra-low leak economizer for ventilation and free cooling 
• Barometric relief 
• Multi-stage power exhaust with staged control 
• Multi-stage power exhaust with staged building pressure control 
• Power & control for accessory multi-stage power exhaust with staged building pressure control 
• Power & control for accessory high-capacity power exhaust with modulating building pressure control

Service & Safety

• Condensate overflow switch 
• Pre-filter status switch with access door retainers 
• Service pack with compressor isolation valves. replaceable core filter drier, extended lube lines 
• Return air smoke detector 
• Chicago refrigerant relief valve

Electrical

• Non-fused disconnect 
• Powered or un-powered convenience outlet 
• Phase monitor 
• High short circuit current rating (65kA for 208/230/460V, 25kA for 575V)

Indoor Air Quality (IAQ)

• 2” pre-evaporator filter rack with 2” MERV 8 filters 
• 4” pre-evaporator filter rack with 4” MERV 8 or 13 filters 
• Factory-installed UV-C fixture with wiring, disconnect switch, door interlocks, and access door with UV safe view port

Field-Installed Accessories

Indoor Air Quality

• Return air CO₂ sensor 
• CO₂ space sensor 
• CO₂ aspirator box
• UV-C Emitters

Building Pressure

• Multi-stage power exhaust with staged building pressure control 
• High-capacity power exhaust with modulating building pressure control 
• Barometric relief

Controls

• Return air CO₂ sensor 
• Smoke detector 
• Dirty filter switch 
• Non-communicating space sensors, including temperature and humidity 
• Communicating space sensors, including temperature and humidity 
• Space CO₂ sensors 
• Carrier i-Vu® Equipment Touch display 
• Thermostats

Miscellaneous Options

• 14-inch Roof Curb

*Standard chassis/vertical airflow. See your Carrier representative for information and other configurations.