YORK's newly released 6.5 – 12.5 ton Predator series and 15 – 23 ton Large Sunline commercial roof top units are designed to achieve maximum energy efficiencies, lowering operating costs in the process.
“Building professionals are continuously faced with rising energy costs and evolving sustainability standards,” says Eric Newberg, director of commercial product management, Johnson Controls. “These ultra-high efficiency units allow our customers to achieve significant reductions in energy consumption without sacrificing ease of installation or serviceability.”
With efficiencies reaching as high as 21 IEER, these products comply with requirements set by the United States Department of Energy (DoE), ASHRAE 90.1-2013, 2015 International Energy Conservation Code and the Consortium for Energy Efficiency’s Advanced Tier (though YORK's Large Sunline series 23 ton model does not meet CEE Advanced Tier requirements).
As for the technology involved in achieving these efficiencies, here are five features contractors should note:
- Two independent refrigerant circuits to provide system redundancy and optimal reliability.
- Two UltraTech compressors allow for three stages of cooling on 6.5 - 17.5 ton models; 1 UltraTech compressor and 1 set of tandem scroll compressors provide four stages of cooling on 20 and 23 ton models to meet the most stringent building code requirements.
- IntelliSpeed discrete fan control (DFC) to provide variation of the fan speed based on number of cooling stages engaged.
- ECM condenser fan motor that is significantly more efficient than traditional AC motors.
- Optional MagnaDRY reheat system allows a portion of the refrigerant’s rejected heat to be reused, increasing efficiency and reducing moisture levels without overcooling.
Each unit is built to order and offers a host of options and accessories to match a building’s needs, which includes optional Variable Air Volume (VAV) uses a variable frequency drive and pressure transducer to maintain constant static pressure in the supply duct. VAV units have three stages of cooling operation and the 20 and 23 ton VAV units have four stages of cooling.
Serviceability and operation of the units are optimized with Smart Equipment controls that display alarm messages and identify faults. Smart Equipment controls also provide seamless integration with Johnson Controls building automation interfaces including zone controllers and systems such as the Verasys control system. Additionally, an optional Mobile Access Portal (MAP) allows users to view and edit equipment controller parameters, setpoints, schedules and alarms remotely.
All York commercial rooftop units are designed, engineered and assembled in the United States and are supported with industry-leading warranties: standard 1-year parts warranty and either a 6-month or 1-year promotional labor warranty, which is standard for authorized contractors. For more information, visit YORK.com.
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