48P Packaged Rooftop Unit from Carrier


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48P WEATHERMASTER®

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

48P2 – Vertical CV
48P3 – Vertical VAV
48P4 – Horizontal CV
48P5 – Horizontal VAV

Carrier P Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 48P 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) or variable air volume (VAV) applications. A wide variety of gas heating options are also available. 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
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)
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)
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
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
Alumagard™ coated Turbo-tubular™ heat exchangers
Induced draft combination
IGC provides system evaluation and troubleshooting via on-board LED (light-emitting diode)
Two-stage gas valves with redundant 100% shutoff
Direct spark ignition
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
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 with tracks for auxiliary coil
Double wall construction
2-in. pleated filters
Bag 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 and static 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)
Fan motor options include: High efficiency Premium efficiency
Digital compressor
BACnet communication
Replaceable core filter drier
Security grille (sizes 070-100 only)
Humidi-MiZer™ adaptive dehumidification system

Field Installed Accessories
Liquid propane (LP) conversion kit (sizes 030-070 only)
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 Debonair® (CV units only) Slimline (CV units only) Corporate (CV units only)
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

Additional Information

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Carrier Corporation

A Member of The United Technologies Corporation Family

Stock Symbol: UTX

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