AS NZS 60704.2.3:2009 pdf free download – Household and similar electrical appliances – Test code for the determination of airborne acoustical noise
6.2.4 Replacement: Dishwashers designed for either cold or hot water supply shall be supplied with cold water. The water hardness may be neglected. For noise measurements the static water pressure during filling shall be (240 ± 50) kPa, if not contradictory to the manufacturer’s instructions. The temperature of cold water shall be (1 5 ± 5) °C and the temperature of hot water shall be (55 ± 5) °C. NOTE When, in some countries, the water supply pressure/temperature differs from the water supply pressure/ temperature of the country concerned, measurements carried out at rated pressure/temperature may be misleading for the consumer. In this case, additional measurements may be necessary. If the test pressure/temperature differs from the rated pressure/temperature, this should be reported.
The appliance shall be operated according to 3.1 04 and shall be loaded according to 3.1 03. The test must be carried out with unsoiled loads and without detergents and rinsing aids. If the manufacturer’s instructions clearly describe the loading with the rated capacity, the instructions shall be followed; otherwise the principles of 3.1 03 have to be followed. In the latter case, at least two series of measurements shall be carried out. For the second or the following series of measurements, the load shall be reasonably redistributed, following as far as possible the hints given by the manufacturer for general use. If the dishwasher involves a regulator to adjust spray-force, water pressure shall be regulated according to the manufacturer’s instructions for the standard test programme (see 3.1 04). Care shall be taken to prevent avoidable noise by rattling of tableware through collision by water jets or spray arms. NOTE Normally, a three-hour break with open door is sufficient to cool down the appliance, after an operational cycle.
6.5.5 Replacement: The dishwasher manufacturer’s instructions regarding installation and use of the dishwasher shall be followed . Appliances with an unremovable worktop and appliances specified by the manufacturer for free-standing use only shall be measured free-standing. All other appliances shall be placed in a test enclosure, as described in figure 1 01 , and the worktop – if any – shall be removed. The front edge of the housing of the dishwashers designed to be built in (except door) shall be 20 mm to 25 mm behind the front edge of the test enclosure. If required by the manu- facturer’s instructions, the enclosure shall be provided with ventilation openings accordingly. In the rear left or right corner of the test enclosure, a cut-out at minimum size should be provided and shut by sealing means to avoid any noise leakage. This cut-out is provided to enable water and electricity supply as well as drainage. Care should be taken that no structure-borne noise is transmitted to the test enclosure. If an appliance is provided with spacers, strips or other special means of solid or resilient material for closing the gap(s) between the contours of the appliance and the cabinet or enclosure, these means shall be used accordingly. If such means are not provided, the gap(s) are left open. The test enclosure with the appliance is placed according to 6.5.3. Appliances to be integrated shall be installed under the same conditions as built-in appliances. In addition, the door of the dishwashers shall be equipped, in accordance with the manufacturer’s instructions, with a board of the maximum size allowed by the manufacturer and of the same material and thickness as the test enclosure, see figure 1 01 .