ISO 19967-1 pdf download – Heat pump water heaters – Testingand rating for performance — Part 1: Heat pump water heater for hotwater supply

ISO 19967-1 pdf download – Heat pump water heaters – Testingand rating for performance — Part 1: Heat pump water heater for hotwater supply.
Unless otherwise stated by the manufacturer, the air inlet and air outlet orifices shall not be less than 1 m from the surfaces of the test room; this also applies to any measuring ducts
Any direct heat radiation (e.g. solar radiation) onto heating units in the test room onto the heat pump water heater or onto the temperature measuring points shall be avoided.
5.3 Installation and connection of the heat pump water heaters
The heat pump water heater shall 1w Installed and connected for the test as recommended by the manufacturer’s installation and operation manual. The accessories provided by option (for example heating element) are not included in the test. Temperature and pressure measuring points shall be arranged In order to obtain representative mean values.
5.4 InstallatIon of heat pump water heater consistIng of several parts
in the case of heat pump water heaters consisting of several rcfr.geratlun parts (split heat pump water heater) the following installation conditions shall be complied with for the tests:
a) each refrigerant line shall be Installed In accordance with the manufacturer’s Instructions; the length of each line shall be between S m and 7,5 in:
b) the lines shall be installed so that the difference In elevation does not exceed 2,5 m;
c) thermal insulation shall be applied to the lines in accordance with the manufacturer’s instructions:
d) unless constrained by the design, at least half of the interconnecting lines shall be exposed to the outdoor conditions with the rest of the lines exposed to the Indoor conditions.
For indirect systems where the heat pump water heater is separated from the tank, water or brine connections to the tank shall be installed in accordance with the manufacturer’s instructions to the maximum stated length or S m whichever is shorter. Piping shall be well insulated and made as short as possible and with as few bends as possible.
6 Settings and test conditions
6.1 General
Set points for internal control equipment of the unit such as thermostats, pressure switches or mixing valves shall be set to the values as stated in the installation and operating instructions. If several set points or a range are stated, the manufacturer shall indicate the one to be used for the tests.
Thermostat settings and settings for supplementary electrical heaters shall be done according to the installations and operating instructions and shall remain in the same position for the duration of the test. if the heat pump water heater is equipped with a mixing valve for the hot water, this valve shall be set at the manufacturer’s recommended setting throughout the test.
6.2 Settings for non-dueled air source units
For nonducted units, the adjustable settings such as louvers and fan speed shall be set according to the installation and operating instructions. Without information from the manufacturer, louvers and fan speed shall be set for maximum air flow rate.
7 Performance test and determination of the energy consumption
7.1 General
The test methods specified in this clause are designed to determine the performance of the heat pump water heater when providing heat for hot water supply. The unit shall be installed and adjusted in the initial state conditions and in the initial adjustment conditions as given in CLauses 5 and 6.
7.2 Basic principles
The test consists of the following six principal stages:
— [Stage Aj Stabilisation (see iS);
— [Stage BI Filling and storage volume see iS);
— (Stage Cj Filling and heating up period (see U);
— [Stage Dj Standby power input (see 7.);
— [Stage Ej Water draw-offs (see 7.9);
— [Stage Fj Mixed water at 40 °C and reference hot water temperature (see L1).
After the preparation of the test (stages A and B) the tests C to F are performed as shown in Figure 1. Each Individual stage can be carried out independently lithe starting conditions are the ending conditions of the previous stage.