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
Description
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
Factory-Installed Options
<ul>
<li>Electric heat options include:
<ul>
<li>Low heat</li>
<li>Medium heat</li>
<li>High heat</li>
</ul>
</li>
<li>SCR electric heat control</li>
<li>Hydronic heat</li>
<li>Extended chassis tracks for auxiliary coil</li>
<li>4’ or 8’ blank sections</li>
<li>4-in. pleated filters</li>
<li>Bag or cartridge filters with pre-filters</li>
<li>Final filters</li>
<li>Field Use Filter Section</li>
<li>Various airflow measuring station combinations</li>
<li>UV-C lamps</li>
<li>Barometric relief</li>
<li>Modulating integrated economizer damper</li>
<li>Modulating power exhaust with VFD and building pressure sensor</li>
<li>Return fan with VFD and supply fan tracking</li>
<li>High static fan options, supply, exhaust and return</li>
<li>Alternate high-capacity evaporator coil</li>
<li>Condenser and evaporator options include:
<ul>
<li>All-aluminum Novation condenser and Al/Cu evaporator</li>
<li>E-coat all-aluminum Novation condenser and Al/Cu evaporator</li>
</ul>
</li>
<li>Hot gas bypass</li>
<li>Controls input expansion board</li>
<li>Totally enclosed fan cooled (TEFC) or Outdoor Drip Proof (ODP) fan motors</li>
<li>Bypass on fan motor VFDs</li>
<li>GFI (ground fault interrupter) convenience outlet (powered)</li>
<li>Marine lights</li>
<li>Non-fused disconnect</li>
<li>Agion interior coating</li>
<li>Low outdoor sound</li>
<li>Low ambient control</li>
<li>65 kA SCCR (460V) or 25 kA SCCR (575V)</li>
<li>Digital compressor</li>
<li>BACnet communication</li>
<li>Replaceable core filter drier and service valves</li>
<li>Security grilles or louvers for condenser section</li>
<li>Humidi-MiZer™ adaptive dehumidification system</li>
</ul>
Field-Installed Accessories
<ul>
<li>Mixed air and final filter kits</li>
<li>CO2 space sensor</li>
<li>Outdoor or return humidity sensor (enthalpy)</li>
<li>Field use control box</li>
<li>Controls input expansion board</li>
<li>Navigator™ display</li>
<li>Return air CO2 sensor</li>
<li>Smoke detector</li>
<li>Filter switch</li>
<li>Fan status switch
<ul>
<li>T55 Temperature Sensor</li>
<li>T56 Temperature Sensor</li>
</ul>
</li>
<li>Space temperature sensor with CO2 override</li>
<li>Space temperature sensor set point and CO2 override</li>
<li>MODBUS Carrier translator</li>
<li>LonWorks Carrier translator</li>
<li>BACnet Communication module</li>
<li>System Pilot™ interface</li>
<li>Touch Pilot™ interface</li>
<li>14-in. roof curb</li>
<li>Motormaster V control</li>
<li>Compressor sound blankets</li>
</ul>
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