Carrier Weatherexpert – 50N Commercial Rooftop Units

  • 50N2 – Vert Supply/Return CV/SAV
  • 50N3 – Vert Supply/Return VAV
  • 50N4 – Horz Supply/Return CV/SAV
  • 50N5 – Horz Supply/Return VAV
  • 50N6 – Vert Supply/Return CV/SAV
  • 50N7 – Vert Supply/Horz Return VAV
  • 50N8 – Horz Supply/Vert Return CV/SAV
  • 50N9 – Horz Supply/Vert Return VAV
    Carrier N Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 50N 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 electric or hydronic 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).
  • 75 to 150 Nominal Tons 

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 up to 125F on high efficiency models
  • Double wall foam panel construction
  • 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
  • Robust electric resistance heaters are factory installed nichrome element type, insulated with ceramic bushings, and include
  • operating and safety controls
  • 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
  • One year parts only on all other parts
Carrier Weatherexpert – 50N Commercial Rooftop Units was last modified: August 3rd, 2023 by HVAC Expert

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Factory-Installed Options

  • Electric heat options include:
    • Low heat
    • Medium heat
    • High heat
  • SCR electric heat control
  • Hydronic heat
  • 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
  • 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

  • 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

People like you shared their purchase and installation experience!

Kenny LeungKenny Leung

Brian once again helped me with my project. Before I have installed a gas fireplace and this time I have installed an LG heat pump with 3 indoor heads. We had an amazing experience with Brian and his team for both projects from quote to installation. Brian is experienced, patient, reliable, and provides great friendly service. He’s also tells very interesting life stories which makes enhances the whole experience. All my future business is going to his company. Thanks again Brian!

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Steve NishimuraSteve Nishimura

We were looking to replace A/C, furnace and water heater and had a number of companies provide quotes. Brian of Cozy Comfort Plus was the most engaging person we met and most importantly, the person we trusted the most. His price was very competitive and we decided to go with him. His team of four men, led by Mir, came in and got the job done in one day. We are very happy with the Lennox equipment and the professional installation job done by Cozy Comfort Plus.

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Jeffrey HoffmanJeffrey Hoffman

From installation to maintenance, Cozy Comfort Plus Inc. provided us with prompt, quality service. It took under a day to install our Mitsubishi split-type air conditioner in May, 2021. This week, they attended to cleaning our unit’s filters in less than a day’s notice. The technician explained how to remove, clean and reinstall the filters ourselves which will save us money down the road. I highly recommend Cozy Comfort without reservation.

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