Liquid Chillers Section

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Related Standards

AHRI 550/590 (I-P/2018), Performance Rating of Water-chilling and Heat Pump Water-heating Packages Using the Vapor Compression Cycle

Standard 550/590 Scope
This standard applies to factory-made vapor compression refrigeration Water-chilling and Water-heating Packages including one or more compressors. These Water-chilling and Water-heating Packages include: Water-cooled, Air-cooled, or Evaporatively-cooled Condensers; Water-cooled heat recovery condensers; Air-to-water heat pumps; and Water-to-water heat pumps with a capacity greater or equal to 135,000 Btu/h. Water-to-water heat pumps with a capacity less than 135,000 Btu/h are covered by the latest edition of ASHRAE/ANSI/AHRI/ISO Standard 13256. Note: This standard includes products that may not currently be covered under an AHRI certification program.
AHRI 551/591 (SI/2018): Performance Rating of Water-chilling and Heat Pump Water-heating Packages Using the Vapor Compression Cycle

Standard 551/591 Scope
This standard applies to factory-made vapor compression refrigeration Water-chilling and Water-heating Packages including one or more compressors. These Water-chilling and Water-heating Packages include: Water-cooled, Air-cooled, or Evaporatively-cooled Condensers; Water-cooled heat recovery condensers; Air-to-water heat pumps; and Water-to-water heat pumps with a capacity greater or equal to 40 KW. Water-to-water heat pumps with a capacity less than 40 KW are covered by the latest edition of ASHRAE/ANSI/AHRI/ISO Standard 13256. Note: This standard includes products that may not currently be covered under an AHRI certification program.
AHRI Standard 560 – 2000
Standard 560 Scope
This standard establishes a single set of testing and rating requirements for determining capacities, water pressure drops, integrated part load values (IPLV's) and application part load values (APLV's) for absorption water-chilling and water-heating packages; whereby, equipment performance ratings can be compared from product to product. This standard applies to single-effect steam and hot fluid operated water chilling units, double-effect steam and hot fluid operated water chilling units, and double-effect direct-fired (natural gas, oil, LP gas) water chilling/heating units. Also included are multiple-effect and multi-loop cycle absorption water chilling/heating units.
AHRI Standard 1280 – 2014
Standard 1280 Scope
This standard applies to commercial and industrial Water-cooled Chillers used for refrigerating or air-conditioning of spaces, as defined in Section 3 of this standard and covered by ANSI/AHRI Standards 550/590 (I-P) and 551/591 (SI), Performance Rating of Water Chilling Packages Using the Vapor Compression Cycle. This standard establishes methods for determining the sound power ratings of commercial and industrial Water-cooled Chillers.

AHRI Standard 1280 Whitepaper

Additional standard–related documents available on the Standards web page.



Section Scope

This section applies to factory-designed and prefabricated vapor compression refrigeration water chilling packages including one or more hermetic or open drive compressors (centrifugal, rotary screw, scroll, reciprocating, or other types), equipped with either water-cooled, air-cooled, evaporative-cooled condensers or supplied without a condenser. This section also covers water chilling packages with air or water-cooled heat reclaim condensers.