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Single-Package Rooftop
Standard Efficiency
Gas Heating/Electric Cooling Units
15 to 25 Tons
48TJ Rooftop Unit

The 48TJ units are one-piece gas heating electric cooling units that are prewired and precharged with R-22 at the factory. Units are factory tested in both heating and cooling modes.

Performance Features
  • Each unit features two independent refrigerant circuits with a scroll compressor on each circuit. Refrigerant metering devices for each circuit are TXVs
  • Two-inch, disposable-type fiberglass return air filters
  • Two-stage cooling
  • Two-stage heating
  • Low outdoor temperature cooling operation to 40° F is standard
  • Automatic changeover (when used with auto-changeover thermostat)
  • Adjustable speed main blower drives
  • Liquid line filter driers
  • Induced draft combustion system uses manual reset roll-out switch and induced draft fan proving switch
  • Heating controls include a cycling ignition system with flame rectification sensor and redundant gas valve
  • Integrated Gas Control (IGC) Board
  • Alumagard™ coated Turbo-tubular™ heat exchangers
  • Rated in accordance with ARI Standard 360
  • Designed in accordance with UL Standard 1995
  • Listed by ETL
Maintenance Features
  • Single point electrical service entry
  • Single point gas connection
Installation Features
  • Manually adjustable outside air intake for up to 25% outside air
  • Provision for horizontal return standard on base unit
Reliability Features
  • Compressor protection includes high and low-pressure cutouts and over-temperature protection
  • Dual freezestat protection
  • Condenser-fan motors are internally protected
  • Control circuit protected by circuit breaker
  • Cabinet made of Weather Armor pre-painted, baked enamel finish and insulated with neoprene-coated fiberglass
  • Spring return on power-loss EconoMi$er IV
Standard Limited Warranty
  • Standard one-year product warranty
  • Five-year non-prorated warranty on Alumagard coated Turbo-tubular heat exchanger
  • Five-year warranty on size 016 compressors
  • One-year warranty on size 020-028 compressors
Factory Installed OptionField Installed Accessory
25% open two-position damper Y
Barometric relief damper (not for use with horizontal adapter curb) Y
Condenser coil hail guard assembly (016-025)  Y
Convenience outlet (load side)Y 
Copper fins indoor and outdoor coilY 
Copper fins outdoor coilY 
E-coat outdoor coil (aluminum)Y 
E-coat outdoor coil (copper)Y 
EconoMi$er IV with controllerYY
EconoMi$er2 (without controller)YY
Electronic programmable thermostat Y
Enthalpy or differential enthalpy sensor  Y
Fan/Filter status Y
High static motor and driveY 
Hinged access panelsY 
Horizontal adapter curb (016-025) Y
Humidistat Y
Indoor air quality (CO2) sensor Y
Light commercial Thermidistat™ device Y
LP (liquid propane) conversion kit  Y
Manual outdoor air damper Y
MoistureMi$er™ dehumidification packageY 
Motormaster® I, V head pressure control (low ambient kit)  Y
Novar controlY 
Outdoor air enthalpy sensor Y
Power exhaust without barometric relief  Y
Pre-coat aluminum fins on outdoor coilY 
PremierLink™ DDC communicating controlYY
Return air enthalpy sensor Y
Return air temperature sensor Y
Roof curbs (vertical and horizontal discharge)  Y
Thermostats and subbases Y
Time Guard II (compressor cycle delay) control circuit  Y
Ultraviolet germicidal lampsY 
Unit-mounted non-fused disconnectY 
Winter start time delay Y
AHRI standard 340/360 unitary large acCanada, us etlc-etl
460v Units
All Units

Additional Information
Physical data
Coil Protection
Hinged Panels
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