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WeatherExpert™ High-Efficiency Single-Packaged Rooftop Units
48N

Gas Heating / Electric Cooling Units with Puron® (R-410A) Refrigerant

75 to 150 Nominal Tons

48N2 – Vert Supply/Return CV/SAV
48N3 – Vert Supply/Return VAV
48N4 – Horz Supply/Return CV/SAV
48N5 – Horz Supply/Return VAV
48N6 – Vert Supply/Horz Return CV/SAV
48N7 – Vert Supply/Horz Return VAV
48N8 – Horz Supply/Vert Return CV/SAV
48N9 – Horz Supply/Vert Return VAV

Carrier N Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 48N models feature a double wall foam panel cabinet design with hinged man-sized access panels.

Units are available in constant volume (CV), staged air volume (SAV), or variable air volume (VAV) applications with a wide variety of gas heating options. Units come with the ComfortLink™ DDC (direct digital control) communicating control system and hermetic scroll compressors on dual independent refrigeration circuits controlled via Electronic Expansion Valves (EXV).


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Performance Features

  • High Capacity and High Efficiency models available, meeting or exceeding EER requirements of AHSRAE Standard 90.1
  • Multiple high-efficiency scroll compressors include a crankcase heater and spring isolation, providing up to 8 steps of cooling capacity control with intertwined evaporator coils for full-face active operation at part-load conditions
  • Cooling operating range from 32 to 115F ambient on a standard model, down to -20F with MotorMaster® V control, and upto 125F on high efficiency models
  • Double wall foam panel construction
  • Induced draft gas heating system with the direct spark ignition (DSI) control system measures 81% annual fuel utilization efficiency (AFUE) using the integrated gas controller (IGC)
  • ComfortLink™ control includes: easy to use scrolling marquee display, service diagnostics, run test capabilities, demand limit capability, compressor reverse rotation protection, and BACnet communication option.
  • California Energy Commission Title 24 Compliant

Reliability Features

  • Dual electrically and mechanically independent refrigerant circuits, with coil frost protection, liquid line filter driers, crankcase heaters, and Electronic Expansion Valves (EXV) standard on all models.
  • Compressor protection includes high and low pressure transducers with safety cutouts on compressor
  • Circuit breaker protection for all power components
  • Cabinet made of pre-painted, galvanized steel with baked enamel finish, which meets ASTM B117 salt spray resistance test
  • Direct spark ignition, Alumagard Coated Turbo-tubular heat exchangers, and induced draft combination provide for safety and reliability
  • Reliable Integrated Gas Unit Controller (IGC) provides system evaluation & troubleshooting via on-board LED and two stage gas valves with redundant 100% shutoff
  • Tested in accordance with UL Standard 1995 and listed by ETL and ETL, Canada

Maintenance Features

  • Large hinged service access doors
  • On-board diagnostics include refrigerant pressure sensors
  • Auto component testing simplifies troubleshooting
  • Standard Double wall construction

Installation Features

  • Shipped with R-410A refrigerant charge
  • Single point electrical service entry, through unit bottom or side
  • Lifting lugs

Standard Limited Warranty

  • 3 years parts only on Novation™ condenser coil
  • 5 years parts only, non pro-rated, on heat exchanger
  • One year parts only on all other parts

Factory-Installed Options

  • Low or high gas heat options include:
    • Aluminized steel heat exchanger
    • Stainless steel heat exchanger
    • Stainless steel heat exchanger with staged gas discharge air temperature control
    • Stainless steel heat exchanger with modulating gas discharge air temperature control
  • Extended chassis tracks for auxiliary coil
  • 4’ or 8’ blank sections
  • 4-in. pleated filters
  • Bag or cartridge filters with pre-filters
  • Final filters
  • Field Use Filter Section
  • Various airflow measuring station combinations
  • UV-C lamps
  • Barometric relief
  • Modulating integrated economizer damper
  • Modulating power exhaust with VFD and building pressure sensor
  • Return fan with VFD and supply fan tracking
  • High static fan options, supply, exhaust and return
  • Alternate high-capacity evaporator coil
  • Condenser and evaporator options include:
    • All-aluminum Novation condenser and Al/Cu evaporator
    • E-coat all-aluminum Novation condenser and Al/Cu evaporator
  • Hot gas bypass
  • Controls input expansion board
  • Modulating gas heat control
  • Totally enclosed fan cooled (TEFC) or Outdoor Drip Proof (ODP) fan motors
  • Bypass on fan motor VFDs
  • GFI (ground fault interrupter) convenience outlet (powered)
  • Marine lights
  • Non-fused disconnect
  • Agion interior coating
  • Low outdoor sound
  • Low ambient control
  • 65 kA SCCR (460V) or 25 kA SCCR (575V)
  • Digital compressor
  • BACnet communication
  • Replaceable core filter drier and service valves
  • Security grilles or louvers for condenser section
  • Humidi-MiZer™ adaptive dehumidification system

Field-Installed Accessories

  • Flue extension
  • Mixed air and final filter kits
  • CO2 space sensor
  • Outdoor or return humidity sensor (enthalpy)
  • Field use control box
  • Controls input expansion board
  • Navigator™ display
  • Return air CO2 sensor
  • Smoke detector
  • Filter switch
  • Fan status switch
    • T55 Temperature Sensor
    • T56 Temperature Sensor
  • Space temperature sensor with CO2 override
  • Space temperature sensor set point and CO2 override
  • MODBUS Carrier translator
  • LonWorks Carrier translator
  • BACnet Communication module
  • System Pilot™ interface
  • Touch Pilot™ interface
  • 14-in. roof curb
  • Motormaster V control
  • Compressor sound blankets

Performance Features

  • High Capacity and High Efficiency models available, meeting or exceeding EER requirements of AHSRAE Standard 90.1
  • Multiple high-efficiency scroll compressors include a crankcase heater and spring isolation, providing up to 8 steps of cooling capacity control with intertwined evaporator coils for full-face active operation at part-load conditions
  • Cooling operating range from 32 to 115F ambient on a standard model, down to -20F with MotorMaster® V control, and upto 125F on high efficiency models
  • Double wall foam panel construction
  • Induced draft gas heating system with the direct spark ignition (DSI) control system measures 81% annual fuel utilization efficiency (AFUE) using the integrated gas controller (IGC)
  • ComfortLink™ control includes: easy to use scrolling marquee display, service diagnostics, run test capabilities, demand limit capability, compressor reverse rotation protection, and BACnet communication option.
  • California Energy Commission Title 24 Compliant

Reliability Features

  • Dual electrically and mechanically independent refrigerant circuits, with coil frost protection, liquid line filter driers, crankcase heaters, and Electronic Expansion Valves (EXV) standard on all models.
  • Compressor protection includes high and low pressure transducers with safety cutouts on compressor
  • Circuit breaker protection for all power components
  • Cabinet made of pre-painted, galvanized steel with baked enamel finish, which meets ASTM B117 salt spray resistance test
  • Direct spark ignition, Alumagard Coated Turbo-tubular heat exchangers, and induced draft combination provide for safety and reliability
  • Reliable Integrated Gas Unit Controller (IGC) provides system evaluation & troubleshooting via on-board LED and two stage gas valves with redundant 100% shutoff
  • Tested in accordance with UL Standard 1995 and listed by ETL and ETL, Canada

Maintenance Features

  • Large hinged service access doors
  • On-board diagnostics include refrigerant pressure sensors
  • Auto component testing simplifies troubleshooting
  • Standard Double wall construction

Installation Features

  • Shipped with R-410A refrigerant charge
  • Single point electrical service entry, through unit bottom or side
  • Lifting lugs

Standard Limited Warranty

  • 3 years parts only on Novation™ condenser coil
  • 5 years parts only, non pro-rated, on heat exchanger
  • One year parts only on all other parts

Factory-Installed Options

  • Low or high gas heat options include:
    • Aluminized steel heat exchanger
    • Stainless steel heat exchanger
    • Stainless steel heat exchanger with staged gas discharge air temperature control
    • Stainless steel heat exchanger with modulating gas discharge air temperature control
  • Extended chassis tracks for auxiliary coil
  • 4’ or 8’ blank sections
  • 4-in. pleated filters
  • Bag or cartridge filters with pre-filters
  • Final filters
  • Field Use Filter Section
  • Various airflow measuring station combinations
  • UV-C lamps
  • Barometric relief
  • Modulating integrated economizer damper
  • Modulating power exhaust with VFD and building pressure sensor
  • Return fan with VFD and supply fan tracking
  • High static fan options, supply, exhaust and return
  • Alternate high-capacity evaporator coil
  • Condenser and evaporator options include:
    • All-aluminum Novation condenser and Al/Cu evaporator
    • E-coat all-aluminum Novation condenser and Al/Cu evaporator
  • Hot gas bypass
  • Controls input expansion board
  • Modulating gas heat control
  • Totally enclosed fan cooled (TEFC) or Outdoor Drip Proof (ODP) fan motors
  • Bypass on fan motor VFDs
  • GFI (ground fault interrupter) convenience outlet (powered)
  • Marine lights
  • Non-fused disconnect
  • Agion interior coating
  • Low outdoor sound
  • Low ambient control
  • 65 kA SCCR (460V) or 25 kA SCCR (575V)
  • Digital compressor
  • BACnet communication
  • Replaceable core filter drier and service valves
  • Security grilles or louvers for condenser section
  • Humidi-MiZer™ adaptive dehumidification system

Field-Installed Accessories

  • Flue extension
  • Mixed air and final filter kits
  • CO2 space sensor
  • Outdoor or return humidity sensor (enthalpy)
  • Field use control box
  • Controls input expansion board
  • Navigator™ display
  • Return air CO2 sensor
  • Smoke detector
  • Filter switch
  • Fan status switch
    • T55 Temperature Sensor
    • T56 Temperature Sensor
  • Space temperature sensor with CO2 override
  • Space temperature sensor set point and CO2 override
  • MODBUS Carrier translator
  • LonWorks Carrier translator
  • BACnet Communication module
  • System Pilot™ interface
  • Touch Pilot™ interface
  • 14-in. roof curb
  • Motormaster V control
  • Compressor sound blankets

California residents please see Proposition 65

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Expert Training @ Carrier University: Troubleshooting Applied Rooftops