AS NZS 60704.2.3:2009 – Household and similar electricalappliances-Test code for the determination of airborne acoustical noise Part 2.3: Particular requirements for dishwashers.
The appliance shall be operated according to 3.104 and shall be loaded according to 3 103 The test must be carried out with unsoiled loads and without detergents and rinsing aids
If the manufacturers instructions clearly describe the loading with the rated capacity, the instructions shall be followed otherwise the principles of 3103 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 manufacturers instructions for the standard test programme (see 3104)
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 wiih open door ii suflcpent to cool down the appliance after cii operationai cycle
6.5 LocatIon and mounting of applIances
For floor-standing appliances and counter-top or table-top appliances intended for placing against a wall, the location shall be according to 6 5.3
6.5.2 Not applicable
For measurements on floor-standing appliances intended for placin9 against a wall (including cabinets, counters or test enclosures for building in or under counter types), a vertical reflecting plane shall be available.
When the measurements are made in a hard-walled test room or in a special reverberation test room, a part of a wall of the room will serve for this purpose The minimum area of this part of the wall should be determined by the projection of the appliance, extended by at least 0,5 m upwards and to both sides The minimum distance between any surface of the appliance (cabinet, counter or test enclosure) and the nearest corner of the room shall be 1 m
When measurements are made in a free-field environment, a vertical-reflecting plane (supported by the horizontal reflecting plane) shall be provided The minimum size of this vertical plane shall be at least equal to the size of the projection of the measurement surface.
For both types of test environment, the requirements given below shall be followed
• the acoustic absorption coefficient of the vertical reflecting plane shall be smaller than
• the appliance shall be placed in the test environment without any resilient means other than those incorporated in the appliance;
• care should be taken to avoid any direct contact between the appliance (including protruding parts. worktops, spacers. etc ) and the vertical reflecting plane
• the distance between the vertical reflecting plane and the appliance shall be established by placing the appliance in direct contact with the vertical reflecting plane and then moving it away at a distance of (10 1) cm.
The dishwasher manufacturers instructions regardin9 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 101. and the worktop — it 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 manufacturers 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 8.5.3.
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 manufacturers 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 101.
Moreover the test enclosure shall be provided, in accordance with the manufacturers instructions, at its lower front side with a skirting board of the maximum height which corresponds with the size of the board on the door of the appliance and of the same material and thickness as the test enclosure, see figure 101. If no instructions are given by the manufacturer, a skirting board as described above shall be pressed against the skirting board of the appliance.