ISO 19967-1:2019 pdf – Heat pump water heaters — Testing and rating for performance — Part 1: Heat pump water heater for hot water supply.
1 Scope This document specifies test conditions and test procedures for determining the performance characteristics of air source heat pump water heaters for hot water supply with electrically driven compressors with or without supplementary electric heater and connected to or including only one hot water storage tank. Hot water storage tanks that are connected in series or parallel and behave hydronically as one single tank are considered as one hot water storage tank. In the case of heat pump water heaters consisting of several parts with refrigerant or water connections, this document applies only to those designed and supplied as a complete package. NOTE This document is not applicable to testing procedures for simultaneous operation for hot water supply and space heating. “Simultaneous” means that hot water supply and space heating generation occur at the same time and may interact. 2 Normative references There are no normative references in this document. 3? Terms? and? definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https: //www. iso. org/obp — IEC Electropedia: available at http: //www .electropedia. org/ 3.1 heat pump water heater for hot water supply air source heat pump water heater with electrically driven compressors with or without supplementary electrical heater and connected to or including a hot water storage tank for hot water supply for human use 3.2 hot water supply water heated for human use or household or similar purposes
3.16 smart control device that automatically adapts the water heating process to individual usage conditions with the aim of reducing energy consumption 3.17 smart control factor SCF water heating energy efficiency gain due to smart control 3.18 standby power input P es total power input of the unit during the standby test, including the power input of the unit to overcome heat losses of the tank and the power input of any auxiliary device 3.20 nominal volume V n volume of water that is assigned to the storage tank by the manufacturer and that is marked on the tank 3.21 operating range working range for the heat pump water heater as specified by the manufacturer3.7 volume of mixed water at 40 °C V 40 volume of water at 40 °C, which has the same heat content (enthalpy as the hot water which is delivered above 40 °C at the output of the heat pump water heater 3.8 off-peak product heat pump water heater that is energised for a maximum period of eight consecutive hours between 22:00 and 07:00 of the 24-h tapping pattern 3.9 load? profile given sequence of water draw-offs Note 1 to entry: See Annex A. 3.10 water draw-off given combination of useful water flow rate, useful water temperature, useful energy content and target temperature 3.11 useful? water? flow? rate f(t) minimum flow rate for the draw-off of the load profile 3.12 useful water temperature T m minimum hot water temperature for the draw-off of the load profile 3.13 useful energy content Q tap energy content of hot water provided at a temperature equal to, or above, the useful water temperature, and at water flow rates equal to, or above, the useful water flow rate
5 Installation requirements 5.1 Test apparatus and uncertainties of measurement The test apparatus shall be designed in such a way that all requirements for adjustment of set values, stability criteria and uncertainties of measurement according to this document can be fulfilled. Water systems or other heat transfer liquid systems shall be sufficiently free of entrained gas as to ensure that the measured results are not significantly influenced. The inlet and outlet temperatures of the hot water supply are measured in the centre of the flow and as close as possible to the appliance. The response time of the temperature sensor and the sampling interval shall be chosen to maintain the uncertainties in Table 1. Ducted air systems shall be sufficiently airtight to ensure that the measured results are not significantly influenced by exchange of air with the surroundings. For inverter type control units, the setting of the frequency shall be done for each rating condition. The manufacturer shall provide in the documentation information instructions on obtaining the necessary data to set the required frequencies. If skilled personnel with knowledge of control software are required for the start of the system, the manufacturer or the nominated agent should be in attendance when the system is being installed and prepared for tests.