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1、AS 1731.52003 (Incorporating Amendment No. 1) Australian Standard Refrigerated display cabinets Part 5: Temperature test AS 1731.52003 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 This Australian Standard was prepared by Committee ME-008, Refrigerated Display Cabinets. It was approved on be
2、half of the Council of Standards Australia on 26 September 2003. This Standard was published on 1 October 2003. The following are represented on Committee ME-008: Australian Greenhouse Office Australian Retailers Association Commercial Refrigeration Manufacturers Association of Australia Food Scienc
3、e Australia Institution of Engineers Australia Refrigeration Air Conditioning Companies Association Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new edit
4、ions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed information
5、about Standards can be found by visiting the Standards Web Shop at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisio
6、ns and amendments published each month. Australian StandardsTM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop. We also welcome suggestions for improvement in our Standards, and especia
7、lly encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.org.au, or write to the Chief Executive, Standards Australia, GPO Box 476, Sydney, NSW 2001. This Standard was issued in draft form for comment as DR 03210. Accessed by T
8、AFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.52003 (Incorporating Amendment No. 1) Australian Standard Refrigerated display cabinets Part 5: Temperature test Originated as AS B2201966. Previous edition AS 1731.52000. Second edition 2003. Reissued incorporating Amendment No. 1 (December 2005). CO
9、PYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia GPO Box 476, Sydney, NSW 2001, Austra
10、lia ISBN 0 7337 5529 1 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.52003 2 PREFACE This Standard was prepared by the Australian members of the Joint Standards Australia/Standards New Zealand Committee ME-008, Refrigerated Display Cabinets, to supersede AS 1731.52000, Refrigerated d
11、isplay cabinets, Part 5: Temperature test. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. This Standard incorporates Amendment No. 1 (December 200
12、5). The changes required by the Amendment are indicated in the text by a marginal bar and amendment number against the clause, note, table, figure or part thereof affected. This Standard is based on International Standard prEN 23953-2:2003, Refrigerated display cabinets, Part 2: Classification, requ
13、irements and test conditions. The Standard forms Part of a series of Standards for refrigerated display cabinets, as follows: AS 1731 Refrigerated display cabinets 1731.1 Part 1: Terms and definitions 1731.2 Part 2: General mechanical and physical requirements 1731.3 Part 3: Linear dimensions, areas
14、 and volumes 1731.4 Part 4: General test conditions 1731.5 Part 5: Temperature test (this Standard) 1731.6 Part 6: Classification according to temperatures 1731.7 Part 7: Defrosting test 1731.8 Part 8: Water vapour condensation test 1731.9 Part 9: Electrical energy consumption test 1731.10 Part 10:
15、Test for absence of odour and taste 1731.11 Part 11: Installation, maintenance and user guide 1731.12 Part 12: Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet 1731.13 Part 13: Test report 1731.14 Part 14: Minimum energy performance standard
16、 (MEPS) requirements Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 3 AS 1731.52003 CONTENTS Page 1 SCOPE4 2 REFERENCED DOCUMENTS4 3 OBJECTIVE.4 4 TEST PROCEDURE.4 5 EXPRESSION OF RESULTS. 22 6 TEST REPORT. 23 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.52003 4 Standards Aus
17、tralia .au STANDARDS AUSTRALIA Australian Standard Refrigerated display cabinets Part 5: Temperature test 1 SCOPE 1.1 Scope of the Standard This Standard specifies terminology, general mechanical and physical requirements, test conditions as well as installation and maintenance, for commercial refri
18、gerators and freezers used for the sale or display of food products including beverages. This Standard does not cover refrigerated vending machines, ice-makers, cabinets intended for use in catering and similar non-retail applications. 1.2 Scope of Part 5 This Part of AS 1731 specifies methods for t
19、he determination of test package temperatures in refrigerated display cabinets. 2 REFERENCED DOCUMENTS The following documents are referred to in this Standard: AS 1731 Refrigerated display cabinets 1731.4 Part 4: General test conditions 1731.13 Part 13: Test report 3 OBJECTIVE The objective of this
20、 Standard is to specify the requirements for conducting a temperature test for refrigerated display cabinets. 4 TEST PROCEDURE 4.1 Preparation of test cabinet The cabinet is installed in the test room and the test is prepared according to AS 1731.4. 4.2 Loading the cabinet General The cabinet shall
21、be loaded with filler packages and M-packages (see AS 1731.4) up to the load limit, as illustrated in Figures 1 to 12. These packages shall have previously been brought to a temperature equal to that expected during the test. The test packages shall be arranged so as to form an even level. Each refr
22、igerated shelf area shall be loaded with test packages arranged in such a way that they form rows with a length of 200 mm, by the depth of the cabinet, in the direction of the airflow in the cabinet. A clearance of 25 mm 5 mm shall be left between package rows and adjacent to the internal end walls
23、of the cabinet. For units with perforated discharge panels a clearance of up to 25 mm between the rear panel and the filler package is permitted. A1 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 5 AS 1731.52003 .au Standards Australia It is possible to use partitions with a thickness of appr
24、oximately 25 mm to position the packages on condition that they have a minimal effect on normal airflow and minimal thermal conduction. Lengthways, any remaining spaces shall be filled with test packages to obtain one or two adjustment rows of which the width can measure from 100 mm up to 300 mm. De
25、pth-wise, any remaining spaces of less than 25 mm wide shall be filled with wooden vertical dividers, placed approximately midway along the space between two M-packages. For roll-in cabinets or multi-deck cabinets with a loading height above 500 mm (see Figure 13), some wood loading may be used. The
26、 thickness of each layer is not specified. (Varnished pieces of exterior grade plywood with good water resistance, 200 mm by 50 mm by the depth of loading can be used). Metallic grids are used to support the test package loading on M-package rows and the adjacent ones. 4.3 Loading heights The loadin
27、g height of the refrigerated shelves shall be as follows: (a) For horizontal cabinets, the loading height shall be equal to the height defined by the load limit, with a tolerance of 15 0 + mm (see Figures 1, 2, 11, 12). (b) For closed vertical cabinets, the loading height shall be equal to half of t
28、he maximum free height above the refrigerated shelf, with a tolerance of 0 25 + mm (see Figure 10). (c) For open cabinets with minimum of two superimposed refrigerated shelves, the loading height shall be equal to the free height between the refrigerated shelves minus 25 mm, with a tolerance of 25 0
29、 + mm (see Figures 3 and 4). (d) For all open cabinets, intended for sensitive foodstuffs not suitable for multiple layer stacking, the loading shall be equal to 100 mm (for example, see Figures 5 and 7) or equal to 100 mm if specified by the manufacturer for cabinets intended, for example, for sens
30、itive food products not suitable for multiple layer stacking. 4.4 Loading the cabinet M-package locations 4.4.1 General The M-packages shall be placed at the position shown on the cabinet drawings (see Figures 1 to 13). 4.4.2 Longitudinal section For cabinet lengths of less than or equal to 700 mm,
31、M-packages shall be placed in two transverse sections of the loading such that the M-package axis is situated at 75 mm from each cabinet end wall. For cabinet lengths of more than 700 mm, a third transverse section shall be placed midway along the cabinet length, with a tolerance of 75 mm. Where the
32、 cabinet includes at its centre area any mechanical structure, M-packages of this third transverse section and located against the back panel shall be shifted towards the test room air discharge side by 325 mm. 4.4.3 Cross-section For refrigerated shelf depths of less than or equal to 550 mm, M-pack
33、ages shall be located into two longitudinal sections, such that the M-package axis is situated (a) for island-site refrigerated cabinets, at 150 mm (see Figures 1 and 2); and (b) for other cabinets, at 50 mm (see Figures 3 to 13); the first one from the loading front and the second one from the back
34、 panel. Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.52003 6 Standards Australia .au For refrigerated shelf depths of more than 550 mm, a third longitudinal section shall be placed midway across the shelf depth with a tolerance of (i) for cabinets with forced air cooling, d/2 0 100
35、+ mm from the air discharge side (see Figure 1 and Figures 3 to 8); (ii) for natural convection cooled cabinets equipped with two evaporators or symmetrical layout, d/2 0 50 + mm (see Figures 2, 11 and 12); (iii) for other natural convection cooled cabinets, d/2 0 100 + mm from the evaporator side (
36、see Figure 9). In the height, for the base deck and for each refrigerated shelf, M-packages shall be located in the lower and upper loading layers. When the distance between the axes of M-packages is more than 400 mm, another M-package layer shall be introduced (see Figures 3, 4 and 12). For cabinet
37、s with a minimum of four superimposed refrigerated shelves of which two are strictly identical and having the same shape and same sizes for length, depth, and loading height, the same airflow design for inlet and outlet and same radiation heat transfer conditions, more particularly same location and
38、 intensity of the lower and upper lighting devices, M-packages shall be located as follows (A) with two identical refrigerated shelves: on the lower one (see Figure 3, where the second and the third shelves from the top are identical); (B) with three identical refrigerated shelves: on the central on
39、e (see Figures 4 and 10, where the second, the third and the fourth shelves from the top are identical). Two extra M-packages shall be located within the net volume so that the highest temperature of the warmest test package and the lowest temperature of the coldest test package will be recorded. 4.
40、5 Running-in Before tests are started, the cabinet shall be switched on and allowed to run for 24 h or operate at stable conditions for at least 4 h at the specified climate class. For closed refrigerated cabinets, stable conditions shall be determined prior to the door opening sequence. When a cabi
41、net with a remote condensing unit is tested, the operating conditions shall comply with those stated by the cabinet manufacturer. During the running-in period there shall not be erratic functioning of the refrigerating system, controls or defrosting operations. For the tests the cabinet shall be fil
42、led up to the load limit with test packages and M- packages according to Clause 4.4. Adjustable automatic controllers shall be set in such a way that the required temperature class inside the cabinet is reached. Where the controller is not adjustable, the cabinet shall be tested as delivered. The ma
43、nufacturers recommended routine of defrosting shall be followed. The test room shall be maintained at the described climate class as specified in AS 1731.4, while the temperatures of the M-packages are recorded. These recordings will vary cyclically and the length of the cycle is dependent on the ti
44、me between two successive defrost periods. A1 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 7 AS 1731.52003 .au Standards Australia 4.6 Stable conditions Stable operating conditions are deemed to be reached when at each M-package the temperatures at the corresponding points on the temperatur
45、e curve agree within 0.5C during a period of 24 h. 4.7 Closed refrigerated cabinet The test for closed refrigerated cabinets shall always be carried out on a complete cabinet, regardless of the number of doors or lids. The door opening sequences shall be performed by automated, mechanical means. Eac
46、h door or lid shall be opened six times per hour. Where more than one door or lid pertains to the cabinet to be tested, the sequence in which the doors and lids are opened shall be staggered; i.e., in case of two doors: door 1 at the time of 0 min, door 2 at the time of 5 min, door 1 at the time of
47、10 min, door 2 at the time of 15 min, etc. The doors shall be opened beyond an angle of 60. The door or lid shall be open for a total of 6 s. During this period the door shall be kept open beyond the angle of 60 for 4 s. NOTE: The test laboratory may need to work with the manufacturer or importer of
48、 the cabinet to agree on a mutually acceptable cable entry. In difficult situations a cable entry hole may need to be provided in the cabinet for testing. This hole may be able to be fitted with sealing plugs after testing is complete. For closed refrigerated cabinets with doors used for loading onl
49、y, these loading doors shall not be opened during the test sequence. Before starting the opening cycle, each door or lid shall be opened for 3 min. Where a cabinet is provided with more than one door or lid, each door or lid shall be opened for 3 min consecutively. If the refrigerated cabinet is fitted with a lighting system, this shall be switched on 1 h before starting the opening cycle. The whole testing period shall last at least 48 h, du