Standards Development

Scope

For factory made, electric mains operated, variable refrigerant flow air-cooled air conditioners and air-to-air heat pumps with a rated capacity above 12 kW for cooling or for heating if the product has no cooling function, this document specifies:

— the standard test conditions and the test methods for determining the capacity and efficiency ratings and,

— calculation methods for seasonal performance.

NOTE 1 Throughout this document, “heat pumps” means “air to air heat pumps” and “air conditioners” means “air-cooled air conditioners”.

This standard establishes a method for determining global variable refrigerant flow (VRF) performance with annexes addressing specific national or regional deviations.

NOTE 2 For example, regionally specific power or testing requirement will be included in an annex.

This standard does not apply to the testing and rating of:

a) water-source heat pumps or water-cooled air conditioners;

b) multi-split systems where each indoor unit has dedicated piping connected directly to the outdoor unit; or

c) individual assemblies not constituting a complete refrigeration system.