Packaged Rooftop 50P

50P WEATHERMASTER®

Single-Package High-Efficiency
Electric Cooling Rooftop Units
with Puron® Refrigerant (R-410A)
30 to 100 Nominal Tons

50P2 – Vertical CV
50P3 – Vertical VAV
50P4 – Horizontal CV
50P5 – Horizontal VAV

Carrier P Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 50P models feature an industrial grade cabinet with fully hinged access panels. Standard forward-curved supply fans provide superior supply fan performance of up to 4 in. external static pressure (ESP) while optional airfoil supply fans provide fan performance up to 6 in. ESP.

Units are available in dedicated vertical and horizontal supply/return airflow models for constant volume (CV), staged air volume (SAV), or variable air volume (VAV) applications. Units are cooling only or available with a 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 thermostatic expansion valve (TXV) controlled refrigeration circuits.

Performance Features

  • Puron® non-ozone depleting R-410A refrigerant
  • Multiple high-efficiency scroll compressors include a crankcase heater and spring isolation
  • Up to 8 steps of cooling capacity control
  • Dual independent refrigerant circuits with TXVs
  • Intertwined evaporator coils for full-face active operation at part-load conditions
  • Dual sloped, stainless steel condensate pan
  • Cooling operating range from 32 to 115 F ambient (down to -20 F with accessory Motormaster® V control)
  • 115-volt and 24-volt control circuits
  • 2-in. disposable return air filters
  • Standard 2-in. filter tracks are field convertible to accept 4-in. filters
  • Outside air hoods with permanent filters
  • Single low speed supply fan
  • 2-in. deflection isolation springs on supply fan sled
  • Fixed speed belt-driven blower drive
  • High-efficiency motors meet Energy Policy Act (EPACT)
  • Variable air volume units include:
    • Adjustable speed drive with true torque control
    • Soft start and anti-windmilling control
    • Supply duct static pressure control
    • Discharge air temperature control
    • Supply air temperature reset
  • ComfortLink controls provide:
    • Easy to use scrolling marquee display
    • Time schedule
    • Space temperature sensor capability
    • Service diagnostics, alarms and alarm history
    • CO2 sensor capability for demand controlled ventilation (DCV)
    • Compressor reverse rotation protection
    • Short-cycle compressor protection
    • Self-diagnostic service and start-up run test capability
    • Carrier Comfort Network® (CCN) communications or stand-alone operation
    • Remote start/stop capability
  • Premium efficiency supply fan motors
  • Rated in accordance with ARI Standard 340/360

Reliability Features

  • Dual electrically and mechanically independent refrigerant circuits
  • Crankcase heaters
  • High and low pressure transducers with safety cutouts on compressor
  • Coil frost protection
  • Liquid line filter driers
  • 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
  • Condenser-fan motors are totally enclosed with internal protection
  • Tested in accordance with UL Standard 1995
  • Listed by ETL and ETL, Canada

Maintenance Features

  • Large hinged service access doors
  • On-board diagnostics include refrigerant pressure sensors

Installation Features

  • Shipped with R-410A refrigerant charge
  • Single point electrical service entry, through unit bottom or side
  • Lifting lugs
  • Factory-installed pivoting outside air hoods

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
Electric heat options (vertical configuration only) include:
  • Low heat
  • Medium heat
  • High heat
Hot water coil
Discharge plenum
Extended chassis with tracks for auxiliary coil
Double wall construction
2-in. pleated filters
Bag or cartridge filters (sizes 030-070 only)
Outdoor air cfm station
Manual outside air self-closing damper
Modulating economizer damper
Barometric relief
Non-modulating power exhaust (CV units only)
Modulating power exhaust with building pressure sensor
Alternate high-capacity evaporator coil (all sizes except 035)
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
High capacity power exhaust with VFD (sizes 075-100 only)
Return fan with VFD (sizes 075-100 only)
Bypass on indoor fan motor VFD
GFI (ground fault interrupter) convenience outlet (powered)
Power terminal block
Non-fused disconnect
Airfoil supply fan (sizes 075-105 only)
Low outdoor sound
Low ambient control
65 kA SCCR
Digital compressor
BACnet communication
Replaceable core filter drier
Security grille (sizes 070-100 only)
Humidi-MiZer™ adaptive dehumidification system
 

Field Installed Accessories
Communicating valve actuator (for units with hot water coil option)
2-in. and 4-in. filter kits
CO2 space sensor
Outdoor or return humidity sensor (enthalpy)
Condenser coil hail guard assembly
Controls input expansion board
Navigator™ display
Return air CO2 sensor
Smoke detector
Filter switch
Fan status switch
Thermostat options include:
  • T55
  • T56
Space temperature sensor with CO2 override
Space temperature sensor set point and CO2 override
MODBUS Carrier translator
LonWorks Carrier translator
System Pilot™ interface
Touch Pilot™ interface
14-in. roof curb
Motormaster V control
Compressor sound blanket

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