WeatherExpert™ High-Efficiency Single-Packaged Rooftop Units 48N Gas Heating : Electric Cooling Units with Puron® (R-410A) Refrigerant 75 to 150 Nominal Tons: 马来西亚的首选 United Faith Sdn Bhd

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Gas Heating / Electric Cooling Units with Puron® (R-410A) Refrigerant

75 to 150 Nominal Tons

48N2 – Vert Supply/Return CV/SAV
48N3 – Vert Supply/Return VAV
48N4 – Horz Supply/Return CV/SAV
48N5 – Horz Supply/Return VAV
48N6 – Vert Supply/Horz Return CV/SAV
48N7 – Vert Supply/Horz Return VAV
48N8 – Horz Supply/Vert Return CV/SAV
48N9 – Horz Supply/Vert Return VAV

Carrier N Series rooftop units are pre-wired and factory-tested in both cooling and heating modes. All 48N 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 gas 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).

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 upto 125F on high efficiency models
Double wall foam panel construction
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)
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
Direct spark ignition, Alumagard Coated Turbo-tubular heat exchangers, and induced draft combination provide for safety and reliability
Reliable Integrated Gas Unit Controller (IGC) provides system evaluation & troubleshooting via on-board LED and two stage gas valves with redundant 100% shutoff
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

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 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
Modulating gas heat control
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

Flue extension
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

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