SIST EN ISO 23953-2:2006

SLOVENSKI STANDARD
SIST EN ISO 23953-2:2006
01-julij-2006
5D]VWDYQHKODGLOQHRPDUH±GHO5D]YUãþDQMH]DKWHYHLQSUHVNXVQLSRJRML,62

Refrigerated display cabinets - Part 2: Classification, requirements and test conditions
(ISO 23953-2:2005)
Verkaufskühlmöbel - Teil 2: Klassifizierung, Anforderungen und Prüfbedingungen (ISO
23953-2:2005)
Meubles frigorifiques de vente - Partie 2: Classification, exigences et méthodes d'essai
(ISO 23953-2:2005)
Ta slovenski standard je istoveten z: EN ISO 23953-2:2005
ICS:
97.130.20
SIST EN ISO 23953-2:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 23953-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2005
ICS 97.130.20 Supersedes EN 441-2:1994, EN 441-3:1994, EN 441-
4:1994, EN 441-5:1996, EN 441-6:1994, EN 441-7:1994,
EN 441-8:1994, EN 441-9:1994, EN 441-10:1994,
EN 441-11:1994, EN 441-12:1997.
English Version
Refrigerated display cabinets - Part 2: Classification,
requirements and test conditions (ISO 23953-2:2005)
Meubles frigorifiques de vente - Partie 2: Classification, Verkaufskühlmöbel - Teil 2: Klassifizierung, Anforderungen
exigences et méthodes d'essai (ISO 23953-2:2005) und Prüfbedingungen (ISO 23953-2:2005)
This European Standard was approved by CEN on 26 September 2005.

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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23953-2:2005: E
worldwide for CEN national Members.

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EN ISO 23953-2:2005 (E)




Foreword



This document (EN ISO 23953-2:2005) has been prepared by Technical Committee CEN/TC 44 "Household
refrigerating appliances and commercial refrigeration equipment", 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 April 2006, and conflicting national standards shall be withdrawn at
the latest by April 2006.

This document supersedes EN 441-2:1994, EN 441-3:1994, EN 441-4:1994, EN 441-5:1996, EN 441-
6:1994, EN 441-7:1994, EN 441-8:1994, EN 441-9:1994, EN 441-10:1994, EN 441-11:1994, EN 441-
12:1997.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.

2

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INTERNATIONAL ISO
STANDARD 23953-2
First edition
2005-10-15

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 23953-2:2005(E)
©
ISO 2005

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ISO 23953-2:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 23953-2:2005(E)
Contents Page
Foreword. v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms. 1
3.1 General. 2
3.2 Compression-type refrigeration systems. 3
3.3 Indirect refrigeration-type systems. 3
4 Requirements . 4
4.1 Construction. 4
4.1.1 General. 4
4.1.2 Materials . 5
4.1.3 Thermal insulation. 6
4.1.4 Refrigerating system . 6
4.1.5 Electrical components. 7
4.1.6 Temperature display. 7
4.2 Operating characteristics . 9
4.2.1 Absence of odour and taste . 9
4.2.2 Classification according to temperature. 9
4.2.3 Defrosting . 9
4.2.4 Water vapour condensation . 10
4.2.5 Energy consumption . 10
5 Tests. 10
5.1 General. 10
5.2 Tests outside test room . 10
5.2.1 Seal test for doors and lids. 10
5.2.2 Linear dimensions, areas and volumes.11
5.3 Tests inside test room. 11
5.3.1 General conditions . 11
5.3.2 Preparation of test cabinet and general test procedures. 20
5.3.3 Temperature test. 41
5.3.4 Water vapour condensation test. 44
5.3.5 Electrical energy consumption test. 45
5.3.6 Heat extraction rate measurement when condensing unit is remote from cabinet. 45
6 Test report . 54
6.1 General. 54
6.2 Tests outside test room . 54
6.2.1 Seal test of doors and lids . 54
6.2.2 Linear dimensions, areas and volumes.55
6.2.3 Test for absence of odour and taste (if applicable) . 55
6.3 Tests inside test room. 55
6.3.1 General test conditions. 55
6.3.2 Cabinet preparation. 56
6.3.3 Temperature test. 56
6.3.4 Water vapour condensation test. 57
6.3.5 Electrical energy consumption test. 57
6.3.6 Heat extraction rate measurement when the condensing unit is remote from the cabinet. 58
7 Marking . 59
7.1 Load limit . 59
7.2 Marking plate. 60
© ISO 2005 – All rights reserved iii

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ISO 23953-2:2005(E)
7.3 Information to be supplied by the manufacturer . 60
Annex A (normative) Total display area (TDA) . 62
Annex B (normative) Visibility of products by Arc method (VPA) . 69
Annex C (informative) Comparison between laboratory and in-store conditions . 76
Annex D (informative) Test for absence of odour and taste . 77
Bibliography . 79

iv © ISO 2005 – All rights reserved

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ISO 23953-2:2005(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 23953-2 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 44, Household refrigerating appliances and commercial refrigeration equipment, in collaboration with
Technical Committee ISO/TC 86, Refrigeration and air-conditioning, Subcommittee SC 7, Testing and rating
of commercial refrigerated display cabinets, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This first edition of ISO 23953-2, together with the first edition of ISO 23953-1, cancels and replaces
ISO 1992-1:1974, ISO 1992-4:1974, ISO 1992-5:1974, ISO 1992-6:1974, ISO 5160-1:1979 and
ISO 5160-2:1980, of which it constitutes a technical revision.
ISO 23953 consists of the following parts, under the general title Refrigerated display cabinets:
⎯ Part 1: Vocabulary
⎯ Part 2: Classification, requirements and test conditions

© ISO 2005 – All rights reserved v

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INTERNATIONAL STANDARD ISO 23953-2:2005(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 or cabinets intended for use in catering or similar non-retail applications; nor
does it cover the choice of the types of foodstuffs chosen to be displayed in the cabinets.
2 Normative references
The following referenced documents are indispensable for the application of this document. 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 system
ISO 9050, Glass in building — Determination of light transmittance, solar direct transmittance, total solar
energy transmittance and ultraviolet transmittance, and related glazing factors
ISO 23953-1:2005, Refrigerated display cabinets — Part 1: Vocabulary
IEC 60335-2:89, Safety of household and similar electrical appliance — Part 2: Particular requirements for
commercial refrigerating appliances with an incorporated or remote refrigerant condensing unit
EN 378-2, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2:
Design, construction, testing, marking and documentation
EN 60335-1, Safety of household and similar electrical appliances — Part 1: General requirements
3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the terms and definitions given in ISO 23953-1 and the following symbols
and abbreviated terms apply.
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ISO 23953-2:2005(E)
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
t 75 % of the running time between defrosts, excluding the time just after defrost, 0,75 t

run75 run
t stopping time — time during which compressor is not running (or solenoid valve is closed) or
stop
secondary refrigerant is not circulating (or solenoid valve is closed), within 24 h and excluding
defrost time
t defrost time — time during defrost during which compressor is not running (or solenoid valve is
deft
closed) or secondary refrigerant is generally not circulating, within 24 h, but not considered as
stopping time
q mass flow rate of liquid refrigerant or secondary refrigerant in kilograms per second
m
∆t time between two consecutive measuring samples
N number of measuring samples in 24 hours

max
N number of measuring samples during 75 % of the running time period between 2 defrosts,

75
excluding time just after defrost
n number of defrosts during 24 h
deft
DEC direct electrical energy consumption, in kilowatt hours per 24 h period
REC refrigeration electrical energy consumption, in kilowatt hours per 2 h period, for remote cabinet
RC
for compression-type refrigerating system
REC refrigeration electrical energy consumption, in kilowatt hours per 2 h period, for remote cabinet
RI
for indirect refrigerating system
TEC total energy consumption in kilowatt hours per 24 h period
t relative or percentage running time:
rr
tt
run run

t==
rr
tt+−24t
run stop deft
where tt++t = 24 h
run stop deft
Φ instant heat extraction rate
n
2 © ISO 2005 – All rights reserved

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ISO 23953-2:2005(E)
3.2 Compression-type refrigeration systems
h , h specific enthalpy in kilojoules per kilogram, where state at point 8 corresponds to refrigerant
8 4
outlet, and state at point 4 to refrigerant inlet, of cabinet
θ refrigerant mean temperature at evaporator outlet

7
θ arithmetic average of evaporator-saturated temperature obtained from pressure p by referring

mrun 7
to table of saturation properties for refrigerant in use — during t , in degrees Celsius
run
θ arithmetic average of evaporator-saturated temperature obtained from pressure p by referring
min 7
to table of saturation properties for refrigerant in use — during the last 10 % of all running
periods, in degrees Celsius
T = θ + 273,18
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 secondary refrigerant median temperature, in degrees Celsius (θ + θ )/2
i o
θ arithmetic average of the secondary refrigerant median temperature (θ) during t , in
mrun run
degrees Celsius
θ arithmetic average of the secondary refrigerant median temperature (θ) during last 10 % of
min
all running periods, in degrees Celsius
q arithmetic average of the secondary refrigerant mass flow during t , in kilograms per
mrun run
second
c specific heat of secondary refrigerant, in kilojoules per kilogram per degree Celsius at
i
cabinet inlet
c specific heat of the secondary refrigerant, in kilojoules per kilogram per degree Celsius, at
o
cabinet outlet
p − p pressure drop between inlet and outlet of cabinet during t , in newtons per square metre
irun orun run
PEC pumping electrical energy consumption
v specific volume of secondary refrigerant, in cubic metres per kilogram
3
(simplification: v = const. = 0,001 m /kg)
© ISO 2005 – All rights reserved 3

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ISO 23953-2:2005(E)
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 and 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;
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.
Self-closing doors shall be opened by different angles up to and including 80° and shall from these different
positions automatically assume their original position and close tight in accordance with 5.2.1.
On low-temperature applications, transparent doors and lids shall be condensate-free at the climate class
specified by the manufacturer. Glass doors shall incorporate sufficient heating to the internal surface to
provide moisture dispersal for clear vision after closing. Horizontal sliding lids are exempt from this
requirement.
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.
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ISO 23953-2:2005(E)
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.

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.
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ISO 23953-2:2005(E)
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.
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 will be 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 EN 378-2.
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 EN 378-1.
6 © ISO 2005 – All rights reserved

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ISO 23953-2:2005(E)
4.1.5 Electrical components
Electrical components shall be in accordance with IEC 60335-2-89 and EN 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
equipm
...