EN ISO 23953-2:2015

Refrigerated display cabinets - Part 2: Classification, requirements and test conditions (ISO 23953-2:2015)

ISO 23953-2:2015 specifies requirements for the construction, characteristics and performance of refrigerated display cabinets used in the sale and display of foodstuffs. It specifies test conditions and methods for checking that the requirements have been satisfied, as well as classification of the cabinets, their marking and the list of their characteristics to be declared by the manufacturer. It is not applicable to refrigerated vending machines. It is also not applicable to cabinets intended for storage or cabinets intended for use, for instance, in catering or non-retail refrigerated applications nor does it cover the choice of the types of foodstuffs chosen to be displayed in the cabinets.

Verkaufskühlmöbel - Teil 2: Klassifizierung, Anforderungen und Prüfbedingungen (ISO 23953-2:2015)

Dieser Teil von ISO 23953 legt Anforderungen an die Konstruktion, Eigenschaften und Leistung von Verkaufskühlmöbeln für den Verkauf und die Ausstellung von Lebensmittelerzeugnissen fest. Er legt Prüfbedingungen und Prüfverfahren für den Nachweis der Erfüllung dieser Anforderungen fest sowie für die Klassifizierung der Möbel, ihre Kennzeichnung und die Liste der vom Hersteller anzugebenden Eigenschaften. Er gilt nicht für Verkaufskühlautomaten. Er gilt ebenfalls nicht für Lagermöbel oder Möbel, die beispielsweise für Catering-Zwecke oder Nicht-Einzelhandelskühlanwendungen bestimmt sind, ebenso fallen Entscheidungen hinsichtlich der Wahl der Lebensmitteltypen für die Ausstellung in den Möbeln nicht in den Geltungsbereich dieser Norm.

Meubles frigorifiques de vente - Partie 2: Classification, exigences et méthodes d'essai (ISO 23953-2:2015)

ISO 23953-2:2015 définit les exigences de construction, les caractéristiques et les performances des meubles frigorifiques de vente utilisés pour la vente l'exposition de denrées alimentaires. Elle spécifie les conditions et les méthodes d'essai pour vérifier que ces exigences ont été respectées, ainsi que la classification des meubles, leurs marquages et la liste des caractéristiques devant être déclarés par le fabricant. Elle ne s'applique pas aux distributeurs automatiques frigorifiques. Elle ne s'applique pas non plus aux meubles destinés au stockage ni aux meubles destinés à être utilisés, par exemple, dans la restauration ou d'autres applications que le commerce de détail. Elle ne couvre pas non plus le choix portant sur les denrées alimentaires à exposer sur les meubles.

Razstavne hladilne omare - 2. del: Razvrščanje, zahteve in preskusni pogoji (ISO 23953-2:2015)

Ta del standarda ISO 23953 določa zahteve za izdelavo, značilnosti in delovanje razstavnih hladilnih omar, ki se uporabljajo za prodajo in razstavljanje živil. Določa preskusne pogoje in metode, na podlagi katerih se preverja skladnost s temi zahtevami, ter razvrščanje teh omar, njihovo označevanje in seznam njihovih značilnosti, ki jih mora navesti proizvajalec. Ne uporablja se za hladilne prodajne avtomate. Prav tako se ne uporablja za omare za shranjevanje ali omare, ki so namenjene za uporabo v gostinstvu ali podobno nemaloprodajno hladilno uporabo. Prav tako ne zajema izbire glede vrste živil, ki bodo razstavljena v omarah.

General Information

• Status: Withdrawn
• Publication Date: 17-Nov-2015
• Withdrawal Date: 13-Apr-2025
• ICS: 97.130.20 - Commercial refrigerating appliances
• Technical Committee: CEN/TC 44 - Household refrigerating appliances and commercial refrigerated cabinets
• Drafting Committee: CEN/TC 44/WG 1 - Commercial refrigerated display cabinets
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 20-Dec-2023
• Completion Date: 14-Apr-2025
• Directive: 2009/125/EC - Directive 2005/32/EC of the European Parliament and of the Council of 6 July 2005 establishing a framework for the setting of ecodesign requirements for energy-using products and amending Council Directive 92/42/EEC and Directives 96/57/EC and 2000/55/EC of the European Parliament and of the Council
• Ref Project: SIST EN ISO 23953-2:2016 - Refrigerated display cabinets - Part 2: Classification, requirements and test conditions (ISO 23953-2:2015)

Relations

• Replaces: EN ISO 23953-2:2005/A1:2012 - Refrigerated display cabinets - Part 2: Classification, requirements and test conditions - Amendment 1 (ISO 23953-2:2005/Amd 1:2012, Corrected version 2012-04-15)
• Effective Date: 25-Nov-2015
• Replaces: EN ISO 23953-2:2005 - Refrigerated display cabinets - Part 2: Classification, requirements and test conditions (ISO 23953-2:2005)
• Effective Date: 31-Oct-2012
• Replaced By: EN ISO 23953-2:2023 - Refrigerated display cabinets - Part 2: Classification, requirements and test conditions (ISO 23953-2:2023)
• Effective Date: 24-Mar-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2016
1DGRPHãþD
SIST EN ISO 23953-2:2006
SIST EN ISO 23953-2:2006/A1:2012
5D]VWDYQHKODGLOQHRPDUHGHO5D]YUãþDQMH]DKWHYHLQSUHVNXVQLSRJRML,62

Refrigerated display cabinets - Part 2: Classification, requirements and test conditions
(ISO 23953-2:2015)
Verkaufskühlmöbel - Teil 2: Klassifizierung, Anforderungen und Prüfbedingungen (ISO
23953-2:2015)
Meubles frigorifiques de vente - Partie 2: Classification, exigences et méthodes d'essai
(ISO 23953-2:2015)
Ta slovenski standard je istoveten z: EN ISO 23953-2:2015
ICS:
97.130.20 Hladilne naprave za trgovine Commercial refrigerating
appliances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 23953-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 97.130.20 Supersedes EN ISO 23953-2:2005
English Version
Refrigerated display cabinets - Part 2: Classification,
requirements and test conditions (ISO 23953-2:2015)
Meubles frigorifiques de vente - Partie 2: Classification, Verkaufskühlmöbel - Teil 2: Klassifizierung,
exigences et méthodes d'essai (ISO 23953-2:2015) Anforderungen und Prüfbedingungen (ISO 23953-
2:2015)
This European Standard was approved by CEN on 3 October 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23953-2:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 23953-2:2015) has been prepared by Technical Committee CEN/TC 44
“Commercial refrigerated cabinets, catering refrigerating appliances and industrial refrigeration", the
secretariat of which is held by UNI, in collaboration with Technical Committee ISO/TC 86 "Refrigeration
and air-conditioning"
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 23953-2:2005.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 23953-2:2015 has been approved by CEN as EN ISO 23953-2:2015 without any
modification.
INTERNATIONAL ISO
STANDARD 23953-2
Second edition
2015-11-01
Refrigerated display cabinets —
Part 2:
Classification, requirements and test
conditions
Meubles frigorifiques de vente —
Partie 2: Classification, exigences et méthodes d’essai
Reference number
ISO 23953-2:2015(E)
©
ISO 2015
ISO 23953-2:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 General . 1
3.2 Compression-type refrigeration systems . 2
3.3 Indirect refrigeration-type systems . 3
4 Requirements . 3
4.1 Construction . 3
4.1.1 General. 3
4.1.2 Materials . 5
4.1.3 Thermal insulation . 5
4.1.4 Refrigerating system. 6
4.1.5 Electrical components . . 6
4.1.6 Temperature display . . 6
4.2 Operating characteristics . 7
4.2.1 Absence of odour and taste . 7
4.2.2 Classification according to temperature . 8
4.2.3 Defrosting . 8
4.2.4 Water vapour condensation . 8
4.2.5 Energy consumption . 8
4.2.6 Specific Energy Consumption . 9
5 Tests . 9
5.1 General . 9
5.2 Tests outside test room . 9
5.2.1 Seal test for doors and lids on low temperature applications . 9
5.2.2 Linear dimensions, areas . 9
5.3 Tests inside test room .10
5.3.1 General conditions .10
5.3.2 Preparation of test cabinet and general test procedures .19
5.3.3 Temperature test .45
5.3.4 Water vapour condensation test .50
5.3.5 Electrical energy consumption test .51
5.3.6 Heat extraction rate measurement when condensing unit is remote
from cabinet .51
6 Test report .60
6.1 General .60
6.2 Tests outside test room .60
6.2.1 Seal test of doors and lids .60
6.2.2 Linear dimensions, areas and volumes .60
6.2.3 Test for absence of odour and taste .61
6.3 Tests inside test room .61
6.3.1 General test conditions .61
6.3.2 Cabinet preparation .61
6.3.3 Temperature test .62
6.3.4 Water vapour condensation test .62
6.3.5 Electrical energy consumption test .63
6.3.6 Heat extraction rate measurement when the condensing unit is remote
from the cabinet .63
7 Marking .65
7.1 Load limit .65
7.2 Marking plate .66
ISO 23953-2:2015(E)
7.3 Information to be supplied by the manufacturer .66
Annex A (normative) Total display area (TDA) .68
Annex B (informative) Comparison between laboratory and in-store conditions .76
Annex C (informative) Test for absence of odour and taste .78
Annex D (normative) Performance and energy rating of commercial refrigerated
display cabinets .80
Bibliography .89
iv © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 86, Refrigeration and air-conditioning,
Subcommittee SC 7, and by Technical Committee CEN/TC 44, Commercial refrigerated cabinets, catering
refrigerating appliances and industrial refrigeration in collaboration.
This second edition cancels and replaces the first edition (ISO 23953-2:2005 and ISO 23953-2:2005/Amd
1:2012), which has been technically revised as follows:
— editorial and technical improvements, corrections and/or clarifications throughout the text to
better apply the standard
— addition of a new Annex D “Performance and energy rating of commercial refrigerated display
cabinets”
ISO 23953 consists of the following parts, under the general title Refrigerated display cabinets:
— Part 1: Vocabulary
— Part 2: Classification, requirements and test conditions
INTERNATIONAL STANDARD ISO 23953-2:2015(E)
Refrigerated display cabinets —
Part 2:
Classification, requirements and test conditions
1 Scope
This part of ISO 23953 specifies requirements for the construction, characteristics and performance
of refrigerated display cabinets used in the sale and display of foodstuffs. It specifies test conditions
and methods for checking that the requirements have been satisfied, as well as classification of the
cabinets, their marking and the list of their characteristics to be declared by the manufacturer. It is not
applicable to refrigerated vending machines. It is also not applicable to cabinets intended for storage
or cabinets intended for use, for instance, in catering or non-retail refrigerated applications nor does it
cover the choice of the types of foodstuffs chosen to be displayed in the cabinets.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 817, Refrigerants — Designation and safety classification
ISO 5149-2:2014, Refrigerating systems and heat pumps — Safety and environmental requirements —
Part 2: Design, construction, testing, marking and documentation
ISO 23953-1:2015, Refrigerated display cabinets — Part 1: Vocabulary
IEC 60335-1, Household and similar electrical appliances - Safety - Part 1: General requirements
IEC 60335-2-89, Household and similar electrical appliances - Safety - Part 2-89: Particular requirements
for commercial refrigerating appliances with an incorporated or remote refrigerant unit or compressor
3 Terms, definitions, symbols and abbreviated terms
3.1 General
t running time — time during which compressor is running (or solenoid valve is open) or
run
secondary refrigerant is circulating (or solenoid valve is open), within 24 h, expressed in
hours
t stopping time — time during which compressor is not running (or solenoid valve is
stop
closed) or secondary refrigerant is not circulating (or solenoid valve is closed), within 24
h and excluding defrost time, expressed in hours
t defrost time — time during defrost during which compressor is not running (or solenoid
deft
valve is closed) or secondary refrigerant is generally not circulating, within 24 h, but not
considered as stopping time, expressed in hours
q mass flow rate of liquid refrigerant or secondary refrigerant in kilograms per second
m
Δt time between two consecutive measuring samples, in hours
ISO 23953-2:2015(E)
N number of measuring samples in 24 hours
max
n number of defrosts during 24 h
deft
Φ heat extraction rate during a whole day excepting defrost time, in kilowatts
Φ heat extraction rate during a whole day excepting defrost time, in kilowatts
24-deft
DEC direct daily electrical energy consumption, in kilowatt hours per 24 h period
DECR revised direct daily electrical energy consumption, in kilowatt hours per 24 h period
REC refrigeration daily electrical energy consumption, in kilowatt hours per 24 h period, for
RC
remote cabinet for compression-type refrigerating system
REC refrigeration daily electrical energy consumption, in kilowatt hours per 24 h period, for
RI
remote cabinet for indirect refrigerating system
RECR revised refrigeration daily electrical energy consumption, in kilowatt hours per 24 h
RC
period, for remote cabinet for compression-type refrigerating system
RECA additional refrigeration daily electrical energy consumption, in kilowatt hours per 24 h
RC
period, for remote cabinet for compression-type refrigerating system
RECR revised refrigeration daily electrical energy consumption, in kilowatt hours per 24 h
RI
period, for remote cabinet for indirect refrigerating system
RECA additional refrigeration daily electrical energy consumption, in kilowatt hours per 24 h
RI
period, for remote cabinet for indirect refrigerating system
TEC total daily electrical energy consumption in kilowatt hours per 24 h period
TECR total revised daily electrical energy consumption in kilowatt hours per 24 h period
TDA total display area, in square meters (see Annex A)
SEC TEC/TDA Specific Daily Electrical Energy Consumption (SEC) for Refrigerated Display
Cabinet expressed in kilowatt hours per 24h per square meters
t relative or percentage running time:
rr
t t
run run
t = =
rr
tt+ 24− t
runstop deft
where
tt++ t =24h
runstopdeft
Φ instant heat extraction rate in kilowatts
n
3.2 Compression-type refrigeration systems
h , h specific enthalpy in kilojoules per kilogram, where state at point 8 corresponds to refrig-
8 4
erant outlet, and state at point 4 to refrigerant inlet, of cabinet
θ refrigerant temperature at evaporator outlet, in degrees Celsius
θ refrigerant temperature at cabinet outlet, in degrees Celsius
θ refrigerant temperature at cabinet inlet, in degrees Celsius
2 © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
θ refrigerant temperature at evaporator inlet, in degrees Celsius
p refrigerant pressure at cabinet outlet, in Pascals
θ arithmetic average of evaporator-saturated temperature obtained from pressure p by
mrun 8
referring to table of saturation properties for refrigerant in use, during t , in degrees
run
Celsius
θ arithmetic average of evaporator-saturated temperature obtained from pressure p by
min 8
referring to table of saturation properties for refrigerant in use, during the last 10 % of
all running periods, in degrees Celsius
T = θ + 273,15 in Kelvin
mrun mrun
3.3 Indirect refrigeration-type systems
θ secondary refrigerant temperature at cabinet inlet, in degrees Celsius
i
θ secondary refrigerant temperature at cabinet outlet, in degrees Celsius
o
+ θ )/2
θ secondary refrigerant median temperature, in degrees Celsius (θ
i o
θ arithmetic average of the secondary refrigerant median temperature (θ) during
mrun
t , in degrees Celsius
run
θ arithmetic average of the secondary refrigerant median temperature (θ) during last
min
10 % of all running periods, in degrees Celsius
q arithmetic average of the secondary refrigerant mass flow during t , in kilograms
mrun run
per second
c specific heat of secondary refrigerant, in kilojoules per kilogram per degree Celsius
i
at cabinet inlet
c specific heat of the secondary refrigerant, in kilojoules per kilogram per degree
o
Celsius, at cabinet outlet
p − p pressure drop between inlet and outlet of cabinet during t , in kilo Pascals
irun orun run
CPEC pumping electrical energy consumption expressed in kilowatt hours per 24 h
period
v specific volume of secondary refrigerant, in cubic metres per kilogram
(simplification: v = const. = 0,001 m /kg)
4 Requirements
4.1 Construction
4.1.1 General
4.1.1.1 Strength and rigidity
The cabinet and its parts shall be constructed with adequate strength and rigidity for normal conditions
of handling, transport and use. Attention shall be given to the following:
a) interior fittings, including shelves, baskets, rails, etc. and their supports, shall be sufficiently strong
for the duty required;
ISO 23953-2:2015(E)
b) where sliding shelves, baskets, trays or drawers are fitted they shall retain their shape and ease of
movement when fully loaded;
c) any fitments which are provided with stops to prevent accidental removal shall be self-supporting
when fully loaded and withdrawn to the limit of the stops;
d) stops.
4.1.1.2 Pipes and connections
Pipes and connections to moving or resiliently mounted parts shall be arranged so as not to foul or
transmit harmful vibrations to other parts. All other pipes and connections shall be securely anchored
and sufficient free length and/or vibration eliminators shall be provided to prevent failure due to
fatigue. Where necessary, pipes and valves shall be adequately thermally insulated.
4.1.1.3 Condensate drainage
Where drains, drip trays or evaporation receptacles are fitted, they shall have ample capacity and shall
be easily accessible and cleanable.
Any condensate or defrost water receptacle, or group of receptacles, requiring to be emptied manually
shall have a capacity equivalent to at least 48 h of normal operation in the appropriate climate class for
which the cabinet is intended.
4.1.1.4 Closed refrigerated cabinets (self-service type)
Closed refrigerated cabinets shall meet certain special requirements as follows.
Hinged lids and doors shall be opened by different angles of at least 60°.
Transparent doors and lids shall be condensate-free at the climate class specified by the manufacturer.
Door fasteners and hinges under normal conditions of use shall be smooth and positive in action and
designed to function properly without undue wear.
When any doors or lids provided to ensure an air seal to the refrigerated space are closed, there shall be
no undue leakage of ambient air into the interior.
The doors or lids shall not open of their own accord.
The gasket shall be made from a material whose characteristics are compatible with the operating
conditions (especially temperatures). If the fastening device is mechanical, a stop or other means shall
be provided to prevent the gasket from being excessively deformed.
4.1.1.5 Joints and seams
All construction joints and seams within the net volume shall prevent the accumulation of potentially
contaminating substances.
All construction joints and seams within the net volume shall permit the easy removal of any deposits
of potentially contaminating substances.
4.1.1.6 Sneeze guard
The front façade constitutes a guard against risks of contamination emanating from consumers through
handling, coughing, etc. in case of display and sale of unpacked foodstuffs.
For this, the sum of vertical dimension A and horizontal dimension B as shown in Figure 1 shall be not
less than 1 500 mm.
4 © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
Key
A vertical dimension
B horizontal dimension
Figure 1 — Dimensions for sneeze guard
4.1.2 Materials
4.1.2.1 General
The materials shall be durable and shall not favour the development of mould or emit odours.
Under normal conditions of use, materials in contact with foodstuffs shall be resistant to moisture and
shall neither be toxic nor contaminate them.
4.1.2.2 Wear resistance
Internal and external finishes shall be resistant to wear and capable of being cleaned effectively and
hygienically. Finishes shall not crack, chip, flake, rub off or soften under normal conditions of use or
during cleaning.
4.1.2.3 Corrosion resistance
Metal parts, used in the construction of cabinets, shall have resistance to corrosion appropriate to their
location and function.
4.1.3 Thermal insulation
4.1.3.1 Efficiency
The thermal insulation shall be efficient and permanently fixed. In particular, the insulating material
shall not be subject to shrinkage and shall not allow under normal working conditions an accumulation
of moisture (see 4.2.4).
4.1.3.2 Vapour barrier
Suitable means shall be used to prevent deterioration of the thermal insulation by the ingress of moisture.
ISO 23953-2:2015(E)
4.1.3.3 Containment of insulation material
Where the insulation space is vented to the inside, it shall be ensured that particles of the insulation
material cannot escape into the foodstuff display compartment.
For fibrous insulation materials, it shall not be possible to insert a rigid probe of 1 mm diameter through
any aperture which allows access to the insulating material, the probe being applied with negligible force.
4.1.4 Refrigerating system
4.1.4.1 Design and construction
The design and construction of all parts of the refrigerating system subject to internal pressure shall
take into account the maximum working pressure to which they are subjected when the cabinet is in
operation or at rest.
For refrigerated display cabinets with integral condensing unit or components thereof which are charged
with refrigerant prior to transportation, the maximum ambient temperature during transit shall be
taken into account. All refrigerant containing components shall be in accordance with ISO 5149-2.
4.1.4.2 Condensation
There shall be suitable means to prevent water condensed on cold surfaces of the cabinet and its parts
from harmfully affecting the operation of the refrigerating system or its controls.
4.1.4.3 System protection
For cabinets fitted with doors or lids, the refrigerating system shall suffer no damage if any door or lid
in the cabinet is left open while the cabinet is operating in an ambient temperature corresponding to
the climate class (see Table 3) for which the cabinet is intended.
When the door or lid is kept open under normal operating conditions (for example, during product loading)
or is left open accidentally, any automatic motor overload protective device may come into operation.
4.1.4.4 Refrigerant
When deciding on the refrigerant for the system, attention shall be given to the possible hazards
associated with the use of certain refrigerants and heat-transfer media or secondary refrigerant, due to
their toxicity, flammability etc. Guidance on this point is available in ISO 5149-2.
4.1.5 Electrical components
Electrical components shall be in accordance with IEC 60335-2-89 and IEC 60335-1.
4.1.6 Temperature display
The cabinets shall incorporate a temperature display instrument showing the air temperature in the
refrigerated display cabinets to provide an indication of the operation and functioning of refrigerating
equipment and information on its operating state.
NOTE As a rule, measured air temperature is not identical with foodstuff temperature in refrigerated
display cabinets.
4.1.6.1 Temperature-measuring instrument
Suitable temperature-measuring instruments shall be used, i.e. those that fulfil the following
requirements:
— the unit symbol (°C or °F) shall be inscribed or displayed on the temperature-measuring instrument;
6 © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
— the range of measurement shall be at least from −25 °C to +15 °C;
— the scale division or smallest numerical increment shall be less than or equal to 1 °C;
— the maximum errors shall be 2 K over the total measuring range;
— the time constant t90 of the sensor shall be equal to or less than 20 min.
NOTE The t time is the time in which 90 % of a sudden temperature change of 20 °C is indicated, the
measurement medium being moderately agitated air (velocity 1 m/s).
4.1.6.2 Temperature sensor location
The temperature sensor location shall be readily accessible to enable on site testing for the correct
indication of temperature and replacement of the temperature measuring instrument on site in service.
NOTE 1 The temperature sensor of a thermometer is considered to be “readily accessible” if it can be reached
directly for examination. It may be necessary to remove access panel(s) to carry out replacement.
NOTE 2 For cabinets with natural convection cooling, the positioning of the temperature sensor in a guide
tube is also considered to be “readily accessible” if the sensor can be introduced into and removed from the guide
tube without a tool.
NOTE 3 For an electronic controller, it is possible to display a calculated temperature.
Wherever possible, the mounting method shall not supply heat to, or withdraw heat from the
temperature sensor.
The temperature sensor shall be protected against heat radiation from the external ambient.
The temperature sensor location is defined as part of the temperature test of the refrigerated display
cabinet. During the temperature test air temperatures at the declared sensor location shall be measured
and these values noted in the test report.
NOTE 4 It is the responsibility of the supplier and end user to ensure that the temperature measurements
comply with national regulation on temperature control of foodstuffs.
4.1.6.3 Number of temperature-measuring instruments
When temperature measuring instruments are employed in refrigerated display cabinets:
— one temperature measuring instrument shall be employed for each refrigerated display cabinet
with its own refrigerating circuit;
— in the case of several refrigerated display cabinets with a common refrigerating circuit operating in
one temperature class, a minimum of one temperature measuring instrument shall be employed for
maximum two refrigerated display cabinets with a total length of maximum 3,75 m;
— in the case of several refrigerated display cabinets with a common refrigerating circuit working
in different temperature classes, the above requirement shall be observed, but with separate
temperature-measuring instruments employed for each temperature class.
4.2 Operating characteristics
4.2.1 Absence of odour and taste
The absence of odour and taste is not compulsory. An optional test method of is given in Annex D.
ISO 23953-2:2015(E)
4.2.2 Classification according to temperature
The performance of cabinets shall comply with one of the classifications defined in Table 1. The
performance shall be verified in accordance with the conditions and test methods specified in 5.3.3.
NOTE Annex B compares laboratory and store condition.
Table 1 — M-package temperature classes
Class Highest temperature, θ , of Lowest temperature, θ , of Highest minimum temper-
ah b
warmest M-package colder than coldest M-package warmer than ature, θ , of all M-package
al
ab b a
or equal to or equal to colder than or equal to
°C
L1 −15 — −18
L2 −12 — −18
L3 −12 — −15
M0 +4 −1 —
M* 6 −1
M1 +5 −1 —
M2 +7 −1 —
H1 +10 +1 —
H2 +10 −1 —
S Special classification
a
See Figure 29a
b
See Figure 29b
For Class M, the highest temperature of warmest package θ colder than or equal to 6,1 °C but the average of the warmest
ah
M package colder than or equal to 5 °C
4.2.3 Defrosting
The accumulation of ice, frost or snow on surfaces within the refrigerated space (excluding the surfaces
of the test packages), as well as the accumulation of drained defrost water, shall not occur, as it would
impair the performance of cabinets other than those which are intended to be defrosted manually.
The proposed defrosting procedures (automatic or manual) shall not affect the temperature
requirements.
For cabinets or parts of cabinets with manual defrosting, the manufacturer shall supply all necessary
instructions for the correct operation of the defrosting system.
4.2.4 Water vapour condensation
The performance of cabinets shall not be impaired by water vapour condensation. The amount of water
vapour condensation shall be verified according to the conditions and test methods specified in 5.3.4.
4.2.5 Energy consumption
The heat extraction rate and the energy consumption shall be stated by the manufacturer.
The direct daily electrical energy consumption (DEC) and, when the condensing unit is remote from the
cabinet, the refrigeration daily electrical energy consumption (REC) and total daily energy consumption
(TEC) shall be measured and calculated according to the conditions and the test methods specified in
5.3.5 and 5.3.6.
8 © ISO 2015 – All rights reserved

ISO 23953-2:2015(E)
4.2.6 Specific Energy Consumption
The Cabinet Specific Daily Electrical Energy consumptions SEC as ratio between TEC and TDA shall
be stated by the manufacturer; this value, representing the best index for performance evaluation of a
commercial refrigerated display cabinet.
5 Tests
5.1 General
When the characteristics of a cabinet are to be verified, all the tests and inspections shall be applied to
one and the same cabinet. These tests and inspections may also be made individually for the study of a
particular characteristic.
Table 2 lists the tests and inspections. Cabinets shall comply with the requirements specified in this
part of ISO 23953 using the appropriate test method.
Table 2 — Test summary
Tests and inspections Requirement clause in this Test method
part of ISO 23953
Seal test 4.1 5.2.1
Outside test
Physical dimensions of sneeze guard 4.1.1.6 5.2.2
room
Absence of odour and taste
(see 5.2)
— Annex C
(not compulsory)
Temperature 4.2.2 5.3.3
Defrosting 4.2.3 5.3.3
Inside test room
(see 5.3)
Water vapour condensation 4.2.4 5.3.4
Energy consumption 4.2.5 5.3.5 and 5.3.6
5.2 Tests outside test room
The tests which may be carried out outside the test room deal with the inspection of construction
characteristics, physical dimensions and the absence of odour and taste.
5.2.1 Seal test for doors and lids on low temperature applications
The effectiveness of doors or lids provided to ensure a seal shall be tested as follows (with the cabinet
not running).
Insert a strip of paper 50 mm wide, 0,08 mm thick and of a suitable length at any point of the seal. With
the door or lid closed normally on it the strip of paper shall not slide freely.
NOTE 1 Attention is drawn to the fact that some cabinets having doors provided to ensure an air seal are
fitted with decompression valves which allow air to penetrate for a short period of time so that any drop in
pressure created inside the cabinet may be compensated. No test is required for such valves.
NOTE 2 The most unfavourable points can be found by inspecting the contact of the seal with the cabinet
closed and lit from the inside.
5.2.2 Linear dimensions, areas
Measurements shall be made with the cabinet not in operation but situated in a place where the
temperature is maintained between 16 °C and 30 °C.
ISO 23953-2:2015(E)
For cabinets having detachable ends, overall dimensions are given with and without ends. If the cabinet
includes jacks or other components for adjustment of height, the height defined shall be the minimum
height necessary at installation of the cabinet.
The total display area (TDA) shall be calculated according to Annex A.
5.3 Tests inside test room
The tests which are carried out inside the test room deal with the measurement of the following
characteristics:
— temperature and defrosting;
— water vapour condensation;
— electrical energy consumption;
— heat extraction rate.
These measurements should be made simultaneously.
5.3.1 General conditions
In the following, general testing conditions which are common for all tests specified in 5.3.3 to 5.3.6
carried out inside the test room are defined. These conditions concern the test room, the test and
M-packages, and the measuring instruments.
5.3.1.1 Test room — General design, walls, floor and radiant heat
The test room shall be a parallelepiped space in which two of the opposite side walls, referred to as
the discharge technical side wall and the return technical side wall, are designed to create an even,
horizontal air flow within the test room. By convention, the distance separating these two technical
side walls is referred to as the “length” of the test room.
The minimum useful dimensions (length, width, height) of the test room shall be dependent on the
overall dimensions (length, depth, height) of the cabinet to be tested and on the location of the display
opening of the cabinet (see 5.3.2.1).
The ceiling and the two non-technical side walls of the room shall be thermally insulated and shall be
equipped with an inner metal skin.
A minimum insulation level equivalent to 60 mm of rigid polyurethane foam (λ = 0,03 W/m °C) should
be used for the building of a new test room.
The floor shall be made of concrete or of thermally equivalent material and/or shall be sufficiently
insulated to ensure that external climatic conditions do not affect the floor temperature.
Fluorescent or led lighting shall be installed to maintain 600 ± 100 lx measured at a height of 1 m
above the floor level and shall be lit continuously during the test period. The emission spectrum of that
lighting device within the infrared field shall not include peaks of a value of more than 500 W/5 nm/lm.
The walls, ceilings and any partitions of rooms intended for the testing of refrigerated display cabinets
shall be painted in light grey (for example, NCS 2706-G90Y or RAL 7032) so that the emissivity is
between 0,9 and 1 at 25 °C.
5.3.1.2 Test room (empty) — Thermal and air flow cha
...