WeatherMaster® Single-Packaged Rooftop Units

Single-Packaged Rooftop
Gas Heating / Electric Cooling Units
Puron® (R-410A) Refrigerant

30 to 100 Nominal Tons

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

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

Units are available in constant volume (CV), staged air volume (SAV), or variable air volume (VAV) applications, with electric or hydronic heating options. Units come with the ComfortLink™ DDC (direct digital control) control system, scroll compressors on independent thermostatic expansion valve (TXV) controlled refrigeration circuits.

Performance Features

• Multiple high-efficiency scroll compressors include a crankcase heater and vibration isolation
• 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 115 F ambient (down to -20 F with accessory Motormaster® V control)
• 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.
• Tested in accordance with UL Standard 1995 and listed by ETL and ETL, Canada
• Meet or exceed the EER requirements of ASHRAE Standard 90.1, rated in accordance with ARI Standard 340/360
• California Energy Commission Title 24 Compliant

Reliability Features

• Dual electrically and mechanically independent refrigerant circuits, with coil frost protection, liquid line filter driers, and crankcase heaters standard on all models
• Compressor protection includes high and low pressure transducers with safety cutouts
• 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
• Reliable Integrated Gas Unit Controller (IGC) provides system evaluation & troubleshooting via on-board LED and two stage gas valves with redundant 100% shutoff

Maintenance Features

• Large hinged service access doors
• On-board diagnostics include refrigerant pressure sensors
• Double wall design available

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

• Low, medium, or high Electric heat options (vertical configuration only) include:
  • Staged control heat
  • Silicone Controlled Rectifier (SCR) heat
• Hot water coil
• Discharge plenum
• Extended chassis for an auxiliary coil
• Double wall construction
• 2-in. pleated filters with 4-in. field convertible filter rack
• Bag or cartridge filters (sizes 030-070 only)
• Outdoor air CFM station
• Manual outside air self-closing damper
• Modulating integrated economizer damper
• Modulating integrated ultra-low leak economizer damper
• Barometric relief
• Non-modulating power exhaust (CV units only)
• Modulating power exhaust with building pressure sensor
• High capacity power exhaust with VFD (sizes 075-100 only)
• Return fan with VFD (sizes 075-100 only)
• 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
• Bypass on indoor fan motor VFD
• GFI (ground fault interrupter) convenience outlet (powered)
• Power terminal block
• Non-fused disconnect
• Airfoil supply fan (sizes 075-100 only)
• Low outdoor sound
• Low ambient control
• 65 kA SCCR (460V) or 25 kA SCCR (575V)
• 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
• T55 temperature sensor
• T56 temperature sensor
• Space temperature sensor with CO2 override
• Space temperature sensor set point and CO2 override
• BACnet Communication module
• MODBUS Carrier translator
• LonWorks Carrier translator
• System Pilot™ interface
• Touch Pilot™ interface
• 14-in. roof curb
• Motormaster V control
• Compressor sound blankets