Carrier Weatherexpert – 48LC Commercial Rooftop Units

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
• 3 to 5 ton models have two-stage cooling capacity control and 6 to 23 ton 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
• 3 to 23 ton models have standard cooling operation up to 125 °F (52°C), and down to 10°F (-12°C) (3-5 ton models), or down to 40°F (4°C) (6-23 ton models). 3 to 5 ton models have cooling operation down to 0°F (-18°C) with ComfortLink controls.
• 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 04-12 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
• Exclusive IGC anti-cycle protection for gas heat operation
• Solid-state electronic direct spark ignition system and flame roll-out safety protector

Standard Limited Warranty

• 10 years parts only heat exchanger – aluminized
• 15 years parts only heat exchanger – stainless steel
• 5 years parts only compressor
• 3 years parts only on ComfortLink controls
• One year parts only on all other parts
• Extended warranty packages available