BS EN 12102-2:2019 pdf free.Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors -Determination of the sound power level.
BS EN 12102-2 This document specifies methods for testing the sound power level of air/water, brine/ water,water/water and direct exchange/water heat pump water heaters and heat pump combination heaters with electrically driven compressors and connected to or including a domestic hot water storage tank for domestic hot water production. This European Standard comprises only the testing procedure for the domestic hot water production of the heat pump system. NOTE 1 Testing procedures for simultaneous operation for domestic hot water production and space heating are not treated in this standard. Simultaneous operation means that domestic hot water production and space heating generation occur at the same time and may interact. NOTE2 For space heating function, the requirements are given in EN 12102-1:2017. This European Standard only applies to water heaters which are supplied in a package of heat pump and storage tank. In the case of water heaters consisting of several parts with refrigerant connections, this European Standard applies only to those designed and supplied as a complete package. This European Standard does not specify requirements for the quality of the used water.For units with small VPD, the water tank temperature increases slowly and will not dramatically change during the time necessary to perform acoustic measurement. Fifteen minutes are given to perform this task, allowing some time-consuming processes of the standards (e.g. increase the number of microphone positions). For units with large VPD, the water tank temperature increases quickly. The sound power level shall be continuously measured during the water tank heating, with several small draw-offs. Then the acoustic values corresponding to the target water tank temperature Thw shall be deduced from the evolution of temperature versus time.If a defrosting cycle occurs during the acoustic measurement period, the procedure shall be restarted. If a defrosting cycle occurs within 10 min after the end of the acoustic measurement period, the measurement is considered valid for ducted units, if the pressure drop remains constant within a tolerance of 10 % compared to the steady unfrosted behaviour of the unit. For other units, the procedure shall be restarted.BS EN 12102-2 pdf download.