Canadian Consulting Engineer

Heat pump re-engineered for commercial facilities

January 2, 2024

York CYK 400 chiller

Photo courtesy Johnson Controls.

Johnson Controls has re-engineered its York CYK water-to-water compound centrifugal heat pump to deliver operational savings and meet stringent sustainability standards for existing commercial buildings.

The new 400-ton capacity model has been added to the existing 600- to 2,000-ton product line to extend its application to more facilities. It can reportedly reduce water and operational costs by up to 50% and is available with optional ultra-low global warming potential (GWP) refrigerants to further support decarbonization and net-zero goals.

The heat pump delivers hot water up to 170 F with two electric motor-driven centrifugal compressors arranged in series. The design achieves simultaneous hot and chilled water cooling within the same equipment, making it three to five times more efficient than a traditional boiler and chiller combination.

“The base design surpasses ASHRAE 90.1 standards for energy efficiency,” says Todd Grabowski, Johnson’s vice-president (VP) and general manager (GM) for applied equipment, “and it provides the flexibility to further enhance efficiencies, based on the unique needs of each building.”

With the addition of double bundle condenser technology, the CYK can manage unbalanced load conditions—i.e. high cooling load with low heating load—in a more compact footprint than alternative systems.


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