scope:

This standard covers matched variable refrigerant flow Multi-Split Air Conditioners and Multi-Split Heat Pumps using distributed refrigerant technology as defined in Section 3.

This standard applies to variable refrigerant flow multi-split systems consisting of the following matched components: a) an outdoor unit with single or multiple compressors or variable capacity compressor or with a variable speed drive; b) indoor unit(s) that have a coil, air movement device intended for single zone air distribution, and a temperature sensing control; and c) a zone temperature control device.

The multi-split systems covered in this standard are Variable Refrigerant Flow (VRF) Multi-Split Systems and Heat Recovery (VRF) Multi-Split Systems. Included are multi-split, matched system air conditioners and heat pumps irrespective of their type of electric power source, type of refrigeration cycle, or secondary fluid (e.g. air-to-air or water-to-air).

This standard does not apply to the testing and rating of individual assemblies for separate use. It also does not cover ductless mini-splits (one-to-one split systems) which are covered by AHRI Standard 210/240.

Energy Source. This standard applies only to electrically operated, vapor compression refrigeration systems.

Note: For the purpose of the remaining clauses, the terms equipment and systems will be used to mean multi-split airconditioners and/or multi-split heat pumps that are described in Sections 2.1 to 2.5.

Purpose. The purpose of this standard is to establish for Variable Refrigerant Flow (VRF) Multi-Split Air Conditioners and Heat Pumps: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; operating requirements; marking and nameplate data; and conformance conditions.