scope:

This part of IS0 13256 establishes performance testing and rating criteria for factory-made residential, commercial and industrial, electrically-driven, mechanical-compression type, water-to-air and brine-to-air heat pumps. The requirements for testing and rating contained in this part of IS0 13256 are based on the use of matched assemblies. 

Equipment designed for rating at one application under this part of IS0 13256 may not be suitable at all applications covered in this part of IS0 13256. 

This par-l of IS0 13256 does not apply to the testing and rating of individual assemblies for separate use, nor to the testing and rating of heat pumps covered in IS0 5151, IS0 13253 or IS0 13256-2.

NOTE - For the purpose of the remaining clauses, the terms "equipment" or "heat pumps" may be used to mean "water-to-air heat pumps" or "brine-to-air heat pumps" and the term "liquid" refers to either "water" or "brine".