scope:

This International Standard specifies the standard conditions on which the ratings of single-package and split-system non-ducted air conditioners employing air- and water-cooled condensers and heat pumps employing air-cooled condensers are based, and the test methods to be applied for determination of the various ratings. This International Standard is limited to systems utilizing a single refrigeration circuit and having one evaporator and one condenser.

NOTE 1 For the purposes of this International Standard, the term "equipment" will be used to mean "non-ducted air conditioners and/or nonducted heat pumps".

This International Standard also specifies the test conditions and the corresponding test procedures for determining various performance characteristics of these non-ducted air conditioners and heat pumps.

It does not apply to the testing and rating of:

a) water-source heat pumps;

b) multiple split-system¹⁾ air conditioners and heat pumps;

c) units designed for use with additional ducting; or

d) mobile (windowless) units having a condenser exhaust duct.

Clause 4 of this International Standard covers the rating and testing conditions for non-ducted air conditioners and heat pumps when used for cooling.

Clause 5 of this International Standard covers the rating and testing conditions for non-ducted air conditioners and heat pumps when used for heating. The means for heating may be the heat pump re- frigeration cycle or electrical resistance.

Annex A establishes testing procedures. Annex B describes the test facilities for the calorimeter method. Annex C provides formulae for the calculation of heating and cooling capacities. Annex D describes instruments which can be used in making measurements, and annex E describes methods for measuring air-flow. Annex F describes the outdoor air-enthalpy test method. Annex G gives a list of symbols used in the annexes.

1) A unit having two or more indoor units connected to a single outdoor unit.