BS EN 12102-2:2019 pdf download.Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors – Determination of the sound power level Part 2: Heat pump water heaters.
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.
NOTE 2 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 specif’ requirements for the quality of the used water.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12102-1:2017, Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidiflers with electrically driven compressors- Determination of the sound power level – Part 1: Air conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers
EN 14511-1, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors – Part 1: Terms and definitions
EN 14511-2, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors – Part 2: Test conditions
EN 145 11-3, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors – Part 3: Test methods
EN 16147:2017, Heat pumps with electrically driven compressors – Testing, performance rating and requirements for marking of domestic hot water units
EN ISO 3741:2010, Acoustics – Determination ofsound power levels and sound energy levels of noise sources using sound pressure – Precision methods for reverberation test rooms (ISO 3 741:2010)
EN ISO 3743-1, Acoustics – Determination of sound power levels and sound energy levels of noise sources
using sound pressure – Engineering methods for small movable sources in reverberant fields – Part 1:Comparison method fora hard-walled test room (1503743-1:2010)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 3741, EN ISO 3743-1, EN ISO 3744, EN ISO 3745, EN ISO 3747, EN ISO 9614 (all parts), EN 14511-1, EN 16147 and EN 12102-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.orIobp
3.2 Symbols, subscripts and units
The symbols, subscripts and units used in this document are given in Table 1.
4 Acoustic characteristics
Table 2 lists the relevant acoustic characteristics, corrected for duct end and bend corrections where relevant, for the typical configurations of heat pump water heaters ilustrated in Annex A.
5 Measurement procedure
5.1 General approach
According to the capacity of the unit and the volume of its tank, defined by the volumic power density (VPD) in W/l, the heating time can dramatically change. The goal is to perform the acoustic measurement when the water tank temperature reaches the target hot water temperature Thw. This temperature shall only be measured by small draw-offs.
Previous studies showed that the noise generated by units is unsteady compared to other HVAC devices. This is why a longer sound pressure averaging of 3 mm is required.
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.
The measurement procedure for heat pump water heaters with a direct heat exchanger between the sanitary cold water and the refrigerant is given in Annex B.
5.2 Target hot water temperature Thw
The target hot water temperatures Thw at which the measurement shall be done are defined in Annex C. Reaching Thw is checked by small draw-offs, as specified in 5.5.BS EN 12102-2 pdf download.