WeatherExpert® Ultra High-Efficiency Single-Packaged Rooftop Units
50LC

Performance Features

• Exceeded Department of Energy Advanced RTU Challenge by 15%
• Exceeds ASHRAE 90.1 and Energy Star efficiency levels, as well as Consortium for Energy Efficiency (CEE) criteria
• All models have three-stage cooling capacity control
• Up to 17.5 SEER and 20.8 IEER
• Exclusive non-corrosive composite condensate pan in accordance with ASHRAE 62 Standard, sloping design; side or center drain
• All models have standard cooling operation up to 125 °F (52°C), and down to 40°F (4°C)
• VAV models use a duct static pressure sensor to vary the units indoor fan motor variable frequency drive (VFD) while cooling capacity is controlled by the units supply air temperature sensor, to make sure the correct temperature in each zone.

Maintenance Features

• Control terminal board facilitating simple safety circuit troubleshooting and simplified control box arrangement
• Access panels with easy grip handles and tool-less filter access door
• Innovative, easy starting, no-strip screw feature on unit access panels
• Optional hinged access panels also available
• Two-inch disposable return air filters
• All models have a belt drive evaporator-fan motor and pulley combinations with VFD controller to match the capacity cooling stages for maximum efficiency and comfort control
• 3 to 5 ton models have an optional ECM direct drive (multi-speed and torque) indoor fan motor system

Installation Features

• Same footprint as installed Carrier 3-5 ton rooftops back to 1989, reducing installation costs and time
• Field convertible from vertical to horizontal airflow for slab mounting without any special kits (size 07-12 units)
• Provisions for thru-the-bottom power entry capability as standard
• Single point electric, gas, and controls connections
• Full perimeter base rail with built-in rigging adapters and fork truck slots
• Dedicated vertical and horizontal airflow models available (factory option on size 14 to 26 units)

Reliability Features

• Scroll compressors with internal line-break overload protection
• 24-volt control circuit protected with resettable circuit breaker
• Permanently lubricated evaporator-fan motor
• Totally enclosed condenser motors with permanently lubricated bearings
• Low pressure and high-pressure switch protection
• Large capacity liquid line filter drier as standard

Standard Limited Warranty

• 5 years parts only electric heater
• 5 years parts only compressor
• 3 years parts only on ComfortLink controls
• One year parts only on all other parts
• Extended warranty packages available

Factory-Installed Options

• Cabinet
  • Thru-the-base electrical or gas-line connections
  • Hinged access panels
  • Foil-faced insulation
• Coil Options
  • Cu/Cu indoor and/or outdoor coils
  • Pre-coated outdoor coils
  • Premium, E-coated outdoor coils
• Humidity Control
  • Humidi-MiZer Adaptive dehumidification system
• Condenser Protection
  • Condenser coil hail guard (louvered design)
• Controls
  • ComfortLink DDC communicating controller (sizes 04-06)
  • RTU OPEN multi-protocol controller
  • Smoke detector (supply and/or return air)
• Economizers & Outdoor Air Dampers
  • EconoMi$er X (for electro-mechanical controlled RTUs with CA Title 24 FDD)
  • EconoMi$er2 (for DDC controlled RTUs)
  • Ultra-low leak economizer dampers
  • Motorized 2 position outdoor-air damper
  • Manual outdoor-air damper(sizes 14-26)
  • Barometric relief
  • Power exhaust (sizes 14-26)
• Economizer Sensors & IAQ Devices
  • Single dry bulb temperature sensors
  • Single enthalpy sensors
  • CO2 sensor (wall, duct, or unit mounted)
• Electric Heat
  • Multiple Electric Resistance Heater KW Sizes
  • Single Point kit
• Indoor Motor & Drive
  • Multiple motor and drive packages
• Low Ambient Control
• Power Options
  • Convenience outlet (powered)
  • Convenience outlet (unpowered)
  • Non-fused disconnect
  • HACR Circuit Breaker

Field-Installed Accessories

• Cabinet
  • Thru-the-base electrical or gas-line connections
• Condenser Protection
  • Condenser coil hail guard (louvered design)
• Controls
  • Thermostats, temperature sensors, and subbases
  • Smoke detector (supply and/or return air) (sizes 14-26)
  • Time Guard II compressor delay control circuit
  • Filter status switch
  • Fan status switch
• Economizers & Outdoor Air Dampers
  • EconoMi$er X (for electro-mechanical controlled RTUs with CA Title 24 FDD)
  • EconoMi$er2 (for DDC controlled RTUs)
  • Ultra-low leak economizer dampers
  • Motorized 2 position outdoor-air damper
  • Manual outdoor-air damper
  • Barometric relief
  • Power exhaust
• Economizer Sensors & IAQ Devices
  • Single dry bulb temperature sensors
  • Differential dry bulb temperature sensors
  • Single enthalpy sensors
  • Differential enthalpy sensors
  • CO2 sensor (wall, duct, or unit mounted)
• Electric Heat
  • Multiple Electric Resistance Heater KW Sizes
  • Single Point kit
• Low Ambient Control
  • Winter start kit
• Roof Curbs
  • Roof curb 14" (356mm)
  • Roof curb 24" (610mm)

Electric Cooling Models (50LC)

AHRI = Air-Conditioning, Heating & Refrigeration Institute
ASHRAE = American Society of Heating, Refrigerating and Air Conditioning, Inc.
IEER = Integrated Energy Efficiency Ratio
SEER = Seasonal Energy Efficiency Ratio

NOTES
1. Rated and certified under ARI Standard 210/240---06 or 340/360---07, as appropriate.
2. Ratings are based on:
» Cooling Standard: 80°F (27°C) db, 67°F (19°C) wb indoor air temp and 95°F (35°C) db outdoor air temp.
3. All 50LC units comply with ASHRAE 90.1-2001, 2004 Energy Standard for minimum SEER and EER requirements.
4. Where appropriate, 50LC units comply with US Energy Policy Act (2005). To evaluate code compliance requirements, refer to state and local codes or visit the following website: http://bcap-energy.org to determine if compliance with this standard pertains to your state, territory, or municipality.