Note: Some options may impact agency approvals 
Field-Installed Accessories Roof curb 
Barometric relief 
Modulating power exhaust (30-70 Ton models) 
Hail guard 
LP conversion kit 
Pressure unloaders (CV) 
Communicating programmable thermostats (CV) 
Compressor short-cycle protection (CV) 
Motormaster® control for 20° F low ambient operation (CV & VAV, standard on PIC) 
Space temperature reset (VAV) 
Two-step demand limit module (VAV) 
Remote VAV control panel (VAV) 
VFD remote display module (VAV, PIC) 
Keypad/display module (HSIO) (PIC) 
CO2 sensors for Demand Control Ventilation (PIC) 
Outdoor air CFM control package (PIC) 
Pressure transducers and thermistors (PIC) 
Space temperature sensor with set point adjustment (PIC) 
   Single-Packaged Rooftop Units
Electric Cooling/Gas Heating
Constant Volume or Variable Volume
30 to 105 Tons 
Features Constant volume or VAV models 
Up to 9 steps of cooling capacity control 
Multiple semi-hermetic compressors with suction and discharge service valves, automatically reversible oil pump, insert-type crankcase heater, spring isolation 
Available for vertical and horizontal duct configurations 
Compressor protection includes calibrated circuit breaker overloads, and high and low pressure protection 
Dual independent refrigeration circuits with TXVs 
Intertwined evaporator coils for full-face active operation at part-load conditions 
Single low speed supply fan 
2" deflection isolation springs on supply fan sled 
Pre-painted galvanized steel casing with 500-hour salt spray finish 
Hinged panels for service access 
Standard 2" filter tracks are field convertable to accept 4" filters 
Stainless steel dual sloped condensate pan 
Tuf-Skin Rx™ anti-microbial insulation 
Factory-installed pivoting outdoor air hoods 
Highly reliable Induced Draft Gas Heating System with Direct Spark Ignition (DSI) control system, using the Integrated Gas Control module for 81% AFUE Efficiency 
-20° F low ambient operation (PIC Model) 
Will start and run at 120° F 
Listed by ETL and rated in accordance with ARI 340/360 
Standard one-year warranty with extended warranties available 

48HG Centurion
Factory-Installed Options Non-Fused Disconnect 
Convenience Outlet 
30% Filters 
Corrosion Protection Options 
Alternate motor and high static drives are available 
Fan Status 
Barometric Relief 
Smoke Detector 
Filter Status 
CO2Sensor 
Electric Heaters (50HG) 
Gear Driven Economizer 
Power Exhaust 
4" filter track 

Field-Installed Accessories 65% Filters 
Condensor Coil Hail Guard 
Enthalpy Sensor 
Differential Enthalpy Sensor 
Two-Position Damper 
Thermostats and Subbases 
Electronic Programmable Thermastat 
Fan Status 
Barometric Relief 
Smoke Detector 
Horizontal Kit 
Filter Status 
CO2Sensor 
Electric Heaters (50HG) 
Gear Driven Economizer 
Power Exhaust 
   48HG Centurion 
Single-Packaged Rooftop Units
ASHRAE 90.1 Compliant
With ComfortLink Controls
12½ to 25 Nominal Tons
48HG - Electric Cooling/Gas Heating
50HG - Electric Cooling/Electric Heating 
Features EERs up to 11.6 
15, 17½ & 20 ton models utilize three electronically and mechanically independent refrigerant circuits. 12½ & 25 ton units utilize two electronically and mechanically independent refrigerant circuits 
Refrigerant metering devices for each circuit are TXV 
Freeze protection on all circuits 
Liquid line filter driers 
Fit up to installed Carrier DP,DR,TJ,HJ roof curbs 
Dedicated vertical or side by side horizontal airflow units 
Vertical airflow units are field convertible to side by side horizontal airflow 
ComfortLink™ Controller 
Communications 
Scrolling Marquee Display 
Time Schedule 
Space Temperature Sensor capability 
Service Diagnostics 
Installation Run Test capability 
CO2 sensor capability for Demand Control Ventilation 
Reverse Rotation Protection for Compressors 
Hinged Service Access Panels with double wall construction and tiebacks 
Indoor fan deck slides out for added service convenience 
0-125° F ambient cooling operation 
Low sound: 8.2 bel (sizes 014-024), 8.4 bel (size 028) 
Single Point electrical service entry. Through the basepan electrical connection available 
Condenser fan motors are internally protected 
Weather Armor pre-painted galvanized steel cabinet with baked enamel finish insulated with neoprene-coated fiberglass 
 

Features (48HG Only) Induced draft combustion system 
Reliable IGC (Integrated gas unit controller) provides system evaluation and troubleshooting via onboard LED 
Direct Spark Ignition 
Alumagard Coated Turbo-tubular™ Heat Exchanger 

48TM
Factory-Installed Options Alternate Motor(s) and Adjustable Belt Drive Fans 
25% Manual Outside Air Damper 
EconoMi$er+ with CO2 control capability 
Apollo Communicating Control 
High Static Indoor Fan Motor (Belt Drive) 
Corrosion-Resistant Coils (including E-Coat) 
115 Volt Convenience Outlet 
Non-Fused Disconnect Switch 
PremierLink™ DDC Controls 
Novar 2024/3051 Controls 
Stainless steel (type 409) heat exchangers (48TM only) 

Field-Installed Accessories EconoMi$er2 with CO2 control capability 
EconoMi$er2 w/4-20mA actuator (PremierLink/3rd party control) 
Two-Position Outdoor Air Dampers 
Manual Outdoor Air Dampers 
Fan/Filter Status Sensor – EconoMi$er2 
Power Exhaust System 
Horizontal power exhaust module 
Low Ambient Controls 
Time Guard® II Compressor Delay 
Roof Curbs 
Through-The-Bottom Electrical and/or Gas Connections 
Liquid Propane Kit 
62AQ Energy$Recycler Energy Recovery Unit 
Flue Hood Protector Assembly 
Flue Discharge Deflector 
Condenser Coil Grille 
Condenser Hail Guard 
Thermostats 
Thermidistat™ 
CO2 Sensors (EconoMi$er2 or PremierLink required) 
Space temp sensors T55,T56 (PremierLink) 
Electric Heaters and Single Point Kits 
   48TM 
ASHRAE 90.1 Compliant
Single Packaged Rooftops
3 to 12½ Nominal Tons
48TM - Electric Cooling/Gas Heating
50TM - Electric Cooling/Electric Heating 
Features Listed by UL and UL, Canada, certified by ARI 
Warranty: 1 Year Parts, 5 Year Compressor, 5 Year Heat Exchanger 
Easily convertible airflow capability (down supply/return standard) 
Internally-sloped, composite condensate pan (dual connections) 
Exclusive tool-less filter access door 
Roll-formed base-rail design with forklift slots and rigging holes 
Two curbs for entire line 
Sizes 004-006 operating weights under 500 lbs 
Through-the-bottom utility capability (requires accessory) 
2" disposable filters 
Low pressure, high pressure and freeze protection 
All condenser coils are set on rubber isolators to prevent contact with unit base pan eliminating galvanic corrosion 
Refrigerant filter drier 
Permanently lubricated fan motors 
Compressor vibration isolation mounting 
All units are run tested at the factory 
Low voltage terminal blocks for easy thermostat wiring connections 
Dual compressors and dual refrigeration circuits on sizes 008-014 

Features (48TM Only) Integrated Gas Control (IGC) board with diagnostics 
Tubular, dimpled gas heat exchanger design 
Low NOx models 
Flame rollout safety protector 
Induced draft combustion with fan proving switch 
Direct spark electronic ignition system 
Two-stage gas heat on most sizes