EN IEC 61591 pdf free download
EN IEC 61591 pdf free download.Cooking fume extractors – Methods for measuring performance.
Any extendible visor, which is extendable for normal use in accordance with the manufacturer’s instructions, shall be opened accordingly. If no instructions are given, the extendible visor is fully opened. If the down-draft system can be elevated, the manufacturer’s instructions are followed; otherwise, it shall be measured in its maximum elevated position for use. The maximum sized duct in accordance with the manfacturer’s instructions is to be used. For all tests, the appliance is operated with unchanged default factory settings (e.g. brightness of the display or changeable light colour). Supplementary parts that are part of the appliance are mounted in accordance with the manufacturer’s instructions. Ensure that no network is connected to the appliance for the duration of the measurement, except for the remote control. Before the measurement is made, any conditioning of the cooking fume extractor, unless explicitly required in this document, is not allowed. Ensure that any automatic modes, where the fan speed is altered, are switched off.
7.3 Mass
The mass of the cooking fume extractor, including any filters, supply cord and plug, is
measured and stated in kilograms, rounded to one decimal place.
8 Power measurement of low power modes
The power of -power modes are measured in accordance with lEG 62301.
9 Airborne acoustical noise
Where an airborne acoustical noise measurement is required, it shall be measured in accordance with IEC 60704-2-13.
NOTE A possible procedure for the statistical determination of declared noise values is described in Eii EN 60704-3. il 10 Volumetric airflow
10.1 Purpose
The purpose of this test is to determine the volumetric airflow in general (see 10.3) and at the best efficiency point (BEP) (see 10.4).
The airflow is measured in accordance with the methods contained in ISO 5167-1, ISO 5167-2, ISO 5167-3 and ISO 5167-4.
10.2 Measuring setup
The maximum possible air-outlet of the cooking fume extractor is connected to a pressure compensation chamber (see Figure 1). The duct diameter needs to be the same as that of the air-outlet.
A cooking fume extractor without ducting. e.g. a cooking fume extractor with recirculation mode, is connected directly to the pressure compensation chamber as shown in Figure ib). The pressure compensation chamber shall be adapted to the dimensions of the cooking fume extractor under test.
Follow the manufacturer’s instructions regarding the distance between points 1 and 7, as shown in Figure ic) and id). If there is no value for the distance given, then the distance a is used.
A cooking fume extractor in recirculation mode can have different geometries as “air outlet areas”. These have to be adapted to the pressure compensation chamber.
For non-circular ducts, a virtual diameter is considered that represents the same cross-section. The grease filter is installed for the test.
The odour-reduction filter is not installed for the test, except if the test is done in recirculation mode.
10.3 Measurement of the volumetric airflow
The cooking fume extractor is operated at the highest continuous setting for normal use for at least 1 800 s for warming up.
The cooking fume extractor is operated and, by suitably adjusting the auxiliary fan or the baffle, the airflow corresponding to various pressures can be determined.
The measurements are made with the controls positioned at the highest continuous setting for normal use, at the lowest setting, and at the boost position setting, if any.
The airflow in recirculation mode is determined when the static pressure in the compensation chamber is at ambient pressure. For the measurement of the grease absorption in recirculation mode in Clause 13, the pressure drop of the odour-reduction filter has to be determined.EN IEC 61591 pdf download.
