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46 TRG-TRC010-EN
notes
period five
Application Considerations
Equipment Certification Standards
The Air Conditioning & Refrigeration Institute (ARI) establishes rating standards
for packaged HVAC equipment. ARI also certifies and labels equipment through
programs that involve random testing of a manufacturer’s equipment to verify
published performance.
The overall objective of ARI Standard 550/590–1998 is to promote consistent
rating and testing methods for all types and sizes of water chillers, with an
accurate representation of actual performance. It covers factory-designed,
prefabricated water chillers, both air-cooled and water-cooled, using vapor-
compression refrigeration. This generally includes chillers with centrifugal,
helical-rotary (screw), reciprocating, or scroll compressors.
The standard rating conditions used for ARI certification represent typical
design temperatures and flow rates for which water-cooled and air-cooled
systems are designed. They are not suggestions for good design practice for a
equipment certification standards
ARI Standard 550/590
▲ Purpose
◆ Establish definitions, testing,
and rating requirements
▲ Scope
◆ Factory designed and
prefabricated water chillers
◆ Vapor-compression
refrigeration
◆ Air-cooled and water-cooled
condensing
Figure 62
equipment certification standards
ARI Standard 550/590
▲ Standard rating conditions
◆ Common system conditions for published ratings
◆ Fouling factor
▲ Integrated Part Load Value (IPLV)
◆ Part-load efficiency rating
◆ Based on an “average” single-chiller installation
◆ Standard operating conditions
Figure 63
trgtrc010_book.book Page 46 Wednesday, September 1, 1999 10:42 AM