ASHRAE 206 ADD A

Abstract

<strong>FOREWORD</strong> <br><em>Addendum a changes the intermediate compressor speed for the intermediate heating test from 1/2 of the speed between minimum capacity (k = 1) and the speed for maximum capacity (k = 2) to 1/3 for variable capacity systems. This change brings the testing for variable-capacity air source systems under Standard 206 into agreement with ANSI/ASHRAE Standard 116-2010, Methods of Testing for Rating Seasonal Efficiency of Unitary Air-Conditioners and Heat Pumps. It also changes the intermediate compressor speed for the intermediate heating test from 1/2 to 1/3 for variable-capacity liquid-source and variable-capacity direct geoexchange systems to keep them consistent with the variable- capacity air source systems. The entering water temperature for ground-loop variable-capacity equipment and the entering refrigerant temperature for direct geoexchange variable- capacity equipment is changed from 2.5&#176;C (36.5&#176;F) to 1.7&#176;C (35.0&#176;F) for the intermediate speed heating test to make them consistent with the change in speed. These changes are reflected in Tables 10.7a, 10.7b, and 10.7c</em> <br>Note: In this addendum, changes to the current standard are indicated in the text by <u>underlining</u> (for additions) and&#160;(for deletions) unless the instructions specifically mention some other means of indicating the changes.