More than 95% of total chiller greenhouse gas emissions are attributable to the burning of fossil fuels versus the impact of refrigerant leakage. The TEWI standard considers both the direct impact (refrigerant) and the indirect contribution (energy consumption) to greenhouse gases. Total Equivalent Warming Impact (TEWI) is a more complete measure of environmental progress. Total building efficiency – including chiller plant optimization – has the most significant impact on global warming potential.ģ. The refrigerant properties address the smallest part of a chiller’s potential emissions. Systems that are not optimized perform less efficiently, increasing overall operating cost and fossil fuel usage.Ģ. Some refrigerant alternatives have a negative impact on energy efficiency. Drop-in replacements can increase energy usage. But complete elimination or a phase-out of HFC refrigerants has not been finalized.ġ. In some regions, refrigerants like R-134a and R-410A will start to be used less frequently in new equipment. The Kigali Amendment has identified phase-down goals for HFC refrigerants. The Montreal Protocol mandated HCFC phase-out is proceeding per plan to globally prohibit the use of R-22 and R-123 in new equipment, and will eventually prohibit its production.ģ. Working closely with refrigerant producers, government regulators and other equipment manufacturers provides an opportunity for practical transitions with appropriate investments.Ģ. Johnson Controls is heavily involved in refrigerant regulation discussions. Even when applied safely, these fluids require special handling, training and insurance, which adds cost.ġ. Additional expenses are associated with the use of mildly flammable refrigerants. To overcome these impacts, costly changes would be made, like increased compressor size, increased condenser size and/or increased refrigerant charge.ģ. Some refrigerant alternatives negatively impact capacity and efficiency when just dropped-in. These refrigerants can drastically impact equipment costs. Today, chemically complex refrigerant alternatives like HFO blends are more expensive than HFCs, and it is expected that these alternative will remain more expensive than today’s HFC prices for years to comeĢ. Next generation refrigerants are more expensive. The position of Johnson Controls is to utilize A1 (lower toxicity and non-flammable) refrigerants, especially in YORK® chillers where there are alternative, non-flammable solutions that achieve similar performance and capacity.ġ. The chiller has suction-gas cooled, hermetic, scroll compressors.3. Intertek Testing Services (ETL) and rated in accordance Mechanical refrigeration, ASME, Listed and labeled with Units are designed in accordance with NFPA 70 (National Electric Code), ASHRAE/ANSI 15 Safety code for Restrict unauthorized access to internal components. Protect the condenser coil from incidental damage and Corrosion resistant wire mesh panels are added to Spray testing, yields a minimum ASTM 1654 rating of Which, when subjected to ASTM B117 1000 hour, salt Galvanized steel is coated with baked-on powder paint, The unit structure is heavy-gauge, galvanized steel. Is performed with water flowing through the cooler toĪssure that the refrigeration circuit operates correctly. After assembly, a complete operational test With Refrigerant-22 (HCFC-22) and includes an initial The unit is pressure-tested, evacuated, and fully charged Shipped complete from the factory ready for installation The 47 - 60 Ton (165 - 210 kW) YCAL models are Each unit includes hermetic scroll compressors,Ī liquid cooler, air cooled condenser, and a weather resistant microprocessor control center, all They are completely self-contained and are designedįor outdoor (roof or ground level) installation. YORK Air-Cooled Scroll Chillers provide chilled water for all air conditioning applications usingĬentral station air handling or terminal units. Part Load Ratings - R-22 (English Units). Ratings - R-22 (50Hz - English Units) - Cont. Ratings - R-22 (60Hz - English Units) - Cont.
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