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Single Package Rooftop
Electric Cooling Units
3 to 12½ Nominal Tons

50HJ Rooftop Unit 3 to 12.5 Tons

50HJ units are single-packaged electric cooling ONLY units that are pre-wired and pre-charged with R-22 (HCFC). Electric heat is available as a field-installed accessory. The units are factory tested in the cooling mode.

Performance Features
  • SEERs up to 13.0, EERs to 11.8
  • Single compressor on 3 to 6 ton sizes
  • Dual compressors on 7-1/2 to 12-1/2 ton sizes
  • Exclusive non-corrosive, composite condensate pan in accordance with ASHRAE 62 Standard, sloping design. Provides side or center drain
  • Convertible from vertical to horizontal airflow for slab mounting
  • Acutrol™ refrigerant metering system
  • Copper tube aluminum fin coils with optional corrosion resistant coils
  • Pre-painted exterior panels and primer-coated interior panels tested to 500 hours salt spray protection
  • Low outdoor temperature cooling operation to 25° F
  • Maximum outdoor temperature cooling operation to 125° F
  • Fully insulated cabinet
  • Rated in accordance with ARI Standards 210 (004-006 sizes) and 360 (007-014 sizes)
  • Designed in accordance with Underwriters' Laboratories Standard 1995
  • Listed by UL and UL, Canada
  • Sizes 04-12 are ENERGY STAR qualified
Maintenance Features
  • Two-inch disposable return air filters
  • Tool-less filter access door
  • Belt drive evaporator-fan motors with adjustable pulleys
Installation Features
  • Thru-the-bottom power entry capability
  • Single point electric connections
  • Full perimeter base rail with built-in rigging adapters and fork truck slots
Reliability Features
  • Scroll compressors with internal linebreak overload protection
  • Exclusive Cycle-LOC™ anti-compressor cycle protection
  • 24-volt control circuit protected with resettable circuit breaker
  • Permanently lubricated evaporator fan motor
  • Totally enclosed condenser motors with permanently lubricated bearings
  • Loss of charge, freeze protection, and high-pressure switches
Standard Limited Warranty
  • 5-year electric heaters
  • 5-year compressor
  • 1-year parts
  • Many optional upgrades
Options and Accessories
Factory Installed OptionField Installed Accessory
100% open two-position damperY
25% open two-position damperY
COBRA™ energy recovery unitY
COBRA full perimeter roof curbY
COBRA sleeper rail (for use with standard unit roof curb)Y
Condenser coil grilleY
Condenser coil hail guard assemblyY
Convenience outlet (load side)Y
Copper fins indoor and outdoor coilY
Copper fins outdoor coilY
E-coat outdoor coil (al)Y
E-coat outdoor coil (cu)Y
EconoMi$er IV with corporate controlsYY
EconoMi$er2 (used with PremierLink™ or 3rd party controls)YY
EconoMi$er2 hinged panel kitY
Electric heatY
Electronic programmable thermostatY
Energy$Recycler™ mounting kitY
Energy$Recycler supply air blowerY
Energy$Recycler transformer for 460 vY
Energy$Recycler transformer for 575 vY
Energy$Recycler unitY
Enthalpy or differential enthalpy sensorY
Fan/filter statusY
High-static motor and driveY
Hinged access panelsY
Humidi-MiZer™ adaptive dehumidification systemY
Indoor air quality (CO2) sensorY
Light commercial Thermidistat™ deviceY
Low ambient kitY
Manual outdoor-air damperY
Motormaster® I, II, IV head pressure controlY
Novar controlY
Outdoor air enthalpy sensorY
Outdoor air/return air temperature sensorY
Power exhaust transformer for 575 vY
Power exhaust with barometric reliefY
Pre-coat aluminum fins on outdoor coilY
PremierLink DDC communicating controlYY
Return air enthalpy sensorY
Return air temperature sensorY
Roof curbs (vertical and horizontal discharge)Y
Thermostats and subbasesY
Thru-the-bottom utility connectionsY
Time Guard II control circuit (compressor cycle delay)Y
Unit-mounted non-fused disconnectY
ASHRAE 90.1Energy star
AHRI standard 210/240 unitary small acAHRI standard 340/360 unitary large ac

Additional Information
Physical data
RTU-MP Controller
Cobra Energy Recovery
Coil Protection
Hinged Panels
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