IEC 61010-2-011:2019

IEC 61010-2-011 ®
Edition 2.0 2019-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

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IEC 61010-2-011 ®
Edition 2.0 2019-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Safety requirements for electrical equipment for measurement, control, and

laboratory use –
Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080 ISBN 978-2-8322-6726-4

– 2 – IEC 61010-2-011:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 10
2 Normative references . 11
3 Terms and definitions . 11
4 Tests . 13
5 Marking and documentation . 16
6 Protection against electric shock . 19
7 Protection against mechanical HAZARDS . 20
8 Resistance to mechanical stresses . 20
9 Protection against the spread of fire . 20
10 Equipment temperature limits and resistance to heat . 20
11 Protection against HAZARDS from fluids and solid foreign objects . 22
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 33
13 Protection against liberated gases and substances, explosion and implosion . 33
14 Components and subassemblies . 33
15 Protection by safety interlocks . 33
16 HAZARDS resulting from application . 33
17 RISK assessment . 34
Annexes . 35
Annex G (informative) Leakage and rupture from fluids under pressure . 36
Annex L (informative) Index of defined terms . 37
Annex AA (normative) Non-sparking "n" electrical apparatus device . 38
Annex BB (informative) HAZARDS associated with REFRIGERATING SYSTEMS and
REFRIGERANTS . 39
Annex CC (informative) Safety requirements for components and piping . 41
Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS – Information
and marking requirements. 46
Bibliography . 50

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser . 8
Figure 102 – Flow chart illustrating the selection process . 9
Figure 103 – Scratching TOOL tip details . 28

Table 1 – Symbols . 17
Table 101 – Maximum temperatures for MOTOR-COMPRESSORS . 21
Table 102 – Minimum temperature for determination of saturated vapor pressure of
REFRIGERANT . 23
Table 103 – REFRIGERANT flammability parameters . 31
Table CC.1 – Parameters of pressure vessels according to EN 14276-1 . 41
Table CC.2 – Parameters of pipping according to EN 14276-2 . 43

Table CC.3 – Component and piping requirements . 44
Table CC.4 – Minimum wall thickness for copper and steel tubing . 45
Table DD.1 – Quantity of Group A2/A3 REFRIGERANT per occupied space . 49

– 4 – IEC 61010-2-011:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

International Standard IEC 61010-2-011 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
It has the status of a group safety publication in accordance with IEC Guide 104.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with changes introduced by Amendment 1 of IEC 61010-1:2010;
b) introduction of new defined terms or modified terms to align with Part 2-012 and other
source documents. Editorial changes to use small capitals only for defined terms. Note the
difference of defined term ABNORMAL OPERATION (3.107) in 4.3.2.101 and abnormal
operation in 11.7.104.3 and 11.7.104.5;
c) clarifications for cooling tests in 4.4.2.10;
d) changes pertaining to the accurate employment of the following terms: temperature,
operating temperature, application temperature, CONTROLLED TEMPERATURE, room ambient
and ambient temperature;
e) use of defined term REFRIGERATING SYSTEM to replace cooling system;
f) move text of 4.4.2.101 to 4.3.2.101, since the purpose of ABNORMAL OPERATION, as defined,
is to simulate failure of the ambient conditions of 1.4.1 but not of the SINGLE FAULT
CONDITION of the equipment;
g) use of the term equipment to replace unit, apparatus, appliance, where applicable;
h) in 5.1.2 dd) PS for high and low sides for each REFRIGERANT stage are required only under
NORMAL CONDITION;
i) use of defined term NORMAL CONDITION to replace normal operation;
j) use of defined term OPERATOR to replace user.
The text of this International Standard is based on the following documents:
CDV Report on voting
66/676/CDV 66/683/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61010 series, published under the general title Safety
requirements for electrical equipment for measurement, control, and laboratory use, can be
found on the IEC website.
This Part 2-011 is to be used in conjunction with the latest edition of IEC 61010-1. It was
established on the basis of the third edition (2010) and its Amendment 1 (2016), hereinafter
referred to as Part 1.
This Part 2-011 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for REFRIGERATING
EQUIPMENT.
Where a particular subclause of Part 1 is not mentioned in this Part 2-011, that subclause
applies as far as is reasonable. Where this Part 2-011 states "addition", "modification",

– 6 – IEC 61010-2-011:2019 RLV © IEC 2019
"replacement", or "deletion", the relevant requirement, test specification, or note in Part 1
should be adapted accordingly.
In this standard:
1) the following print types are used:
– requirements and definitions: in roman type;
– NOTES: in smaller roman type;
– conformity and tests: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS.
2) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered
starting from 101. Additional annexes are lettered starting from AA and additional list
items are lettered from aa).
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
This Part 2-011, in conjunction along with Part 2-010 and Part 2-012, taken together,
addresses the specific HAZARDS associated with the heating and cooling of materials by
equipment which are segregated and are organized as follows:
IEC 61010-2-010 Specifically addresses the HAZARDS associated with equipment
incorporating heating systems.
IEC 61010-2-011 Specifically addresses the HAZARDS associated with equipment
incorporating REFRIGERATING SYSTEMS.
IEC 61010-2-012 Specifically addresses the HAZARDS associated with equipment
incorporating both heating and REFRIGERATING SYSTEMS that interact
with each other such that the combined heating and REFRIGERATING
SYSTEM yield additional or more severe HAZARDS for the two systems
than if treated separately. It also addresses the HAZARDS associated
with the treatment of materials by other factors like irradiation,
excessive humidity, CO and mechanical movement.
Guidance for the application of the correct Part 2 standard(s)
When the equipment includes only a material heating system, and no REFRIGERATING SYSTEM
or other environmental factors apply, then Part 2-010 applies without needing Part 2-011 or
Part 2-012. Similarly, when the equipment includes only a REFRIGERATING SYSTEM, and no
material heating system or other environmental factors apply, then Part 2-011 applies without
needing Part 2-010 or Part 2-012. However, when the equipment incorporates both a material
REFRIGERATING SYSTEM or the materials being treated in the intended
heating system, and a
application introduce significant heat into the REFRIGERATING SYSTEM, a determination should
be made as to whether the interaction between the two systems will generate additional or
more severe HAZARDS than if the systems were evaluated separately (application CONTROLLED
TEMPERATURE, see flow chart of Figure 102 for selection process). If the interaction of the
heating and cooling functions yields no additional or more severe HAZARDS then both
Part 2-010 and Part 2-011 apply for their respective functions. Conversely, if additional or
more severe HAZARDS results from the combining of the heating and cooling functions, or if the
equipment incorporates additional material treatment factors, then Part 2-012 applies, but not
Part 2-010 or Part 2-011.
What HAZARDS are applicable for a REFRIGERATING SYSTEM?
The typical HAZARDS for a REFRIGERATING SYSTEM (see Figure 101) consisting of a MOTOR-
COMPRESSOR, a condenser, an expansion device and an evaporator include but are not
limited to:
MOTOR-
– The excess of temperature of the low-pressure side (return temperature) to the
COMPRESSOR is higher than admissible. A MOTOR-COMPRESSOR incorporates a REFRIGERANT
cooled motor and it should be established that the maximum temperatures of low-pressure
side under least favourable condition do not exceed the insulation RATINGS within the
motor.
– The excess of pressure of the low-pressure side at the inlet to the MOTOR-COMPRESSOR is
higher than admissible. The housing of the MOTOR-COMPRESSOR is exposed to this
pressure and so the design RATING of the MOTOR-COMPRESSOR housing should
accommodate the worst-case pressures whilst providing the correct safety margin for a
pressure vessel.
– The excess of temperature of the high-pressure side to the condenser is higher than
admissible. The temperatures of the high-pressure side under the most unfavourable

– 8 – IEC 61010-2-011:2019 RLV © IEC 2019
conditions may can present a temperature HAZARD if the OPERATOR is exposed, or an
electrical HAZARD if insulation is degraded.
– The excess of pressure of the high-pressure side to the condenser is higher than
REFRIGERANT components downstream of the MOTOR-COMPRESSOR up to
admissible. The
the expansion device are exposed to this pressure and so the design RATING of these
components should accommodate the worst case pressures whilst providing the correct
safety margin for a pressure vessel.
– The maximum application CONTROLLED TEMPERATURES where the heat is being extracted
from, may impact the maximum temperature of the low-pressure side to the MOTOR-
COMPRESSOR as well as present a temperature HAZARD if the OPERATOR is exposed, or an
electrical HAZARD if insulation is degraded. Whether this application CONTROLLED
TEMPERATURE is derived from an integral heating function of the device or from the heat
dissipated from the material being cooled, the impact under worst-case conditions should
be evaluated.
– The current draw of the equipment should be established when including the worst-case
running conditions of the REFRIGERATING SYSTEM including any defrost cycles that may
apply.
The worst-case conditions should be determined for the equipment and will include both the
least favourable NORMAL USE conditions as well as the most unfavourable testing results under
SINGLE FAULT CONDITIONS.
Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser

The selection process is illustrated in the following flow chart (see Figure 102).

Figure 102 – Flow chart illustrating the selection process

– 10 – IEC 61010-2-011:2019 RLV © IEC 2019
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

1 Scope and object
This clause of Part 1 is applicable, except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the first second paragraph by the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC guide 104 and ISO/IEC Guide 51.
This Part 2 of IEC 61010 specifies particular safety requirements for the following types
a) to c) of electrical equipment and their accessories, wherever they are intended to be used,
whenever that equipment incorporates REFRIGERATING SYSTEMS whether as an integral part of,
or remote to separate from, the equipment and the equipment is in direct control of the
REFRIGERATING SYSTEM.
This document details all the requirements when up to 150 g of FLAMMABLE REFRIGERANT are
used per stage of a REFRIGERATING SYSTEM. Additional requirements beyond the current scope
of this document apply if a REFRIGERANT charge of FLAMMABLE REFRIGERANT exceeds this
amount.
Addition:
Add the following text after the last paragraph:
NOTE 101 Examples for REFRIGERATING EQUIPMENT include, but are not limited to, laboratory equipment such as
laboratory refrigerators, freezers, refrigerated display cabinets, etc.
If It is possible that all or part of the equipment falls within the scope of one or more other
Part 2 standards of IEC 61010 as well as within the scope of this standard, it should also
meet. In that case, the requirements of those other Part 2 standards will also apply. In
particular, if equipment is intended to be used as a centrifuge, it should meet the
requirements of IEC 61010-2-020 apply. However, when the equipment incorporates a
refrigerating system and a heating function where the combination of the two introduces
additional or more severe HAZARDS than if treated separately, then the application of it is
possible that IEC 61010-2-012 should be considered is applicable instead of this Part 2-011.
See further information in the flow chart (Figure 102) for the selection process and guidance
in the Introduction.
1.1.2 Equipment excluded from scope
Addition:
Add the following new item after item j):
or equipment incorporating:
aa) a transcritical REFRIGERANT SYSTEM (system that uses CO ) or a system that uses
ammonia (NH ) as the REFRIGERANT.
1.2 Object
1.2.1 Aspects included in scope
Replacement:
Replace the first paragraph by the following:
The object of this document is to ensure that the design and methods of construction of
REFRIGERATING EQUIPMENT provide adequate protection for OPERATORS, bystanders, trained
service personnel, and the surrounding area against the specific HAZARDS that relate to
REFRIGERATING SYSTEMS.
Addition:
Add the following note after the existing note:
NOTE 101 A list of HAZARDS typically associated with REFRIGERATING SYSTEMS and REFRIGERANTS is included in
Annex BB.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following references to the list:
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"
IEC 60335-2-34:2012, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
IEC 60335-2-34:2012/AMD1:2015
IEC 60335-2-34:2012/AMD2:2017
UL 471:2010, Commercial Refrigerators and Freezers
ISO 7010, Graphical symbols – Safety colours and safety signs – Registered safety signs
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following new terms and definitions:

– 12 – IEC 61010-2-011:2019 RLV © IEC 2019
3.101
REFRIGERATING EQUIPMENT
test, measurement, control or laboratory equipment that incorporates a REFRIGERATING SYSTEM
either as an integral part of or remote to separate from the equipment
3.102
REFRIGERATING SYSTEM
factory assembled unit for performing part of the refrigerant cycle (compression and
condensation) comprising one or more refrigerant compressors with motors, condensers,
liquid receivers (where required), interconnecting pipe work and ancillary equipment
combination of interconnected REFRIGERANT-containing parts constituting one closed
REFRIGERANT circuit in which the REFRIGERANT is circulated for the purpose of extracting and
rejecting heat
[SOURCE: ISO 5149-1:2014, 3.1.9, modified – The term in brackets "(heat pump)", the words
"(heating and cooling)", and the note to entry, have been omitted.]
3.103
FLAMMABLE REFRIGERANT
REFRIGERANT with a flammability classification of group 2 or 3 in accordance with ISO 5149-1
and ISO 817
Note 1 to entry: For REFRIGERANT blends which have more than one flammability classification, either the most
unfavourable classification is taken for the purpose of this definition or the blend itself is evaluated for flammability
in accordance with ISO 817.
3.104
HPCO
HIGH PRESSURE CUT-OUT
pressure-actuated device that is designed to stop the operation of the pressure generator
Note 1 to entry: This note applies to the French language only.
3.105
MAXIMUM ALLOWABLE PRESSURE
PS
maximum allowable pressure as determined by the collated test results detailed in 11.7
maximum pressure for which the equipment is designed, as specified by the manufacturer
Note 1 to entry: This note applies to the French language only.
[SOURCE: ISO 5149-1:2014, 3.3.3]
3.106
SOAKED TEMPERATURE CONDITION
environmental temperature condition when all the temperatures in the equipment under test
(EUT) equal to ±2 °C of the test room ambient temperature
Note 1 to entry: This note applies to the French language only.
3.107
ABNORMAL OPERATION
operation of a REFRIGERATING SYSTEM EQUIPMENT with a limited RATED ambient temperature
range in ambient temperature conditions outside that limitation but within the temperature
limits of 1.4.1
3.108
REFRIGERANT
fluid used for heat transfer in a REFRIGERATING SYSTEM, which absorbs heat at a low
temperature and a low pressure of the fluid and rejects heat at a higher temperature and a
higher pressure of the fluid, usually involving changes of state of the fluid
[SOURCE: ISO 5149-1:2014, 3.7.9, modified – The note has been removed.]
3.109
CONTROLLED TEMPERATURE
temperature where the evaporator is located and to which the low-pressure side of the
equipment is exposed, as a result of heat transfer either by active heating or from the
application system or specimen
Note 1 to entry: For heat pump systems, where a four-way valve is used to shift between heating and cooling, the
function of the condenser and evaporator is exchanged.
3.110
LOWER EXPLOSIVE LIMIT
LEL
concentration of flammable gas or vapour in air, below which an explosive gas atmosphere
will not be formed
Note 1 to entry: This note applies to the French language only.
[SOURCE: IEC 60050-426:2008, 426-02-09]
3.111
MOTOR-COMPRESSOR
refrigerating subassembly consisting of the mechanical mechanism of the compressor and the
motor, both of which are enclosed in the same sealed housing, with no external shaft seals,
and with the motor operating in a REFRIGERANT atmosphere with or without oil
Note 1 to entry: The housing may be permanently sealed, such as by welding or brazing (hermetic MOTOR-
COMPRESSOR), or may be sealed by gasketted joints (semi-hermetic MOTOR-COMPRESSOR). A TERMINAL box, a
TERMINAL boxcover, and other electrical components or an electronic control system may be included.
[SOURCE: IEC 60335-2-34:2012, 3.101, modified – "appliance" has been replaced by
"refrigerating subassembly" and note 2 has been removed.]
3.112
CONDENSING UNIT
specific refrigerating subassembly combination for a given REFRIGERANT, consisting of one or
more MOTOR-COMPRESSORS, condensers, liquid receivers (when required) and the regularly
furnished accessories
[SOURCE: ISO 5149-1:2014, 3.4.5, modified – The definition has been adapted for the
specific case of refrigerating equipment.]
4 Tests
This clause of Part 1 is applicable, except as follows:
4.3 Reference test conditions
4.3.1 Environmental conditions
Addition:
– 14 – IEC 61010-2-011:2019 RLV © IEC 2019
Add the following text after item d):
Since the operating temperatures, pressures and current draws for a REFRIGERATING SYSTEM
are significantly impacted by ambient temperatures in a non-linear way, linear extrapolation of
test data is not possible. Therefore tests to establish temperatures, pressures, and current
draws of a REFRIGERATING SYSTEM shall be conducted under the following environmental
conditions:
aa) an ambient temperature of 40 °C;
bb) a relative humidity not exceeding the limits of 1.4.1 d).
If the equipment is RATED by the manufacturer to operate in extended environmental
conditions as defined by 1.4.2 or a more restricted environment condition in accordance with
1.4.1, note 2, then these conditions will define the settings for 4.3.1 aa) or 4.3.1 bb).
When the REFRIGERATING SYSTEM is water cooled, the temperature of the water supply shall be
the maximum as specified by the manufacturer (see 5.4.3) with the worst case water pressure
as specified by the manufacturer.
If a restricted environment condition in accordance with 1.4.1, note 2, is employed then the
test of 4.43.2.101 applies.
4.3.2 State of equipment
4.3.2.1 General
Addition:
Add the following text after the first paragraph:
When measuring temperatures, pressures and current draws of equipment incorporating a
REFRIGERATING SYSTEM the tests shall be started from a SOAKED TEMPERATURE CONDITION when
all pressures have fully equalized. Tests at the extremes of the input voltage (±10 %) shall
start under these voltage conditions and achieve a stable state but need not start from a
SOAKED TEMPERATURE CONDITION. Safety protective devices shall not operate during this test.
Addition:
Add the following new subclause:
4.3.2.101 ABNORMAL OPERATION to simulate the failure of the controlled environment
For REFRIGERATING EQUIPMENT intended to operate in a restricted environment and tested in
accordance with 4.3.1 this additional test of ABNORMAL OPERATION shall apply to simulate the
failure of the controlled environment in the installation.
Having determined the worst case test condition for the temperature and pressure tests under
10.4.1 the equipment is run under these conditions until a steady state has been achieved.
The test environment is then increased to the limits from 1.4.1 for normal environmental
conditions (40 °C, up to 50 % RH) and the equipment is allowed to stabilize, and the
maximum temperatures and pressures are recorded. The operation of protective devices is
permitted during this test. If steady state conditions are not possible due to the operation of
protective devices then the maximum values recorded for this test shall be either:
– the maximum temperatures and pressures at the point of operation of non-resettable or
manually resettable devices. The manually resettable device does not need to be reset
during this test; or
– the maximum temperatures and pressures achieved after the cycling of auto-resetting
protective devices. Cycling shall continue until it is clear that successive cycles will not
develop higher maximum values.
4.4.2 Application of fault conditions
4.4.2.10 Cooling
Replacement:
Replace the text with the following:
For cooling not associated with the cooling of the REFRIGERATING SYSTEM:
a) air-holes with filters shall be closed;
b) forced cooling by motor-driven fans shall be stopped;
c) cooling by circulation of water or other coolant shall be stopped.
REFRIGERATING SYSTEM:
For cooling associated with t1he cooling of the
d) Condenser fan stall test – for an air cooled REFRIGERATING SYSTEM
Each condenser fan shall be stalled one at a time unless a single fault could disable all
condenser fans simultaneously, or with the condenser airflow restricted, whichever is the
worst case, until maximum stabilized pressure is attained or until representative maximum
temperatures are attained under cycling load. The temperatures and pressures shall be
monitored at short intervals throughout the test for the pressures to ensure that peak
pressures are captured. This test is conducted at a room an ambient temperature of
25 °C ± 3 °C.
e) Condenser water failure test – for a water cooled REFRIGERATING SYSTEM
The REFRIGERATING SYSTEM is to shall be operated with the condensing water shut off and
also, or with the condensing water restricted whichever is the worst case, until maximum
stabilized temperatures are attained or until representative maximum temperatures are
attained under cycling load. The temperatures and pressures shall be monitored at short
intervals throughout the test for the pressures to ensure that peak pressures are captured.
This test is conducted at a room an ambient temperature of 25 °C ± 3 °C.
f) Condenser fins shall be blocked to simulate clogging with dust etc.
If a manual reset HPCO is relied upon to limit the peak pressure during tests d) or e) or f), then
it shall be reset manually within 6 s of operation for 10 cycles.
If an automatic reset HPCO is relied upon to limit the peak pressure during tests d) or e) or f),
then it shall be permitted to cycle automatically until it can be demonstrated that peak
temperatures and pressures have been achieved.
If it can be demonstrated that an HPCO will operate during tests d) or e) or f), the manufacturer
may can elect to waive this test, but will set the PS for the high and low side of the MOTOR-
COMPRESSOR to the RATING of the HPCO.
For units equipment with both air-cooled and water-cooled condensers, only one can be
faulted at a time unless the customer is permitted to run either the air-cooled or water-cooled
condenser (the design incorporates a redundant cooling option for the condenser).
For a cascade REFRIGERATING SYSTEM, if a heat exchanger from the first stage system acts as
a condenser to the second stage system, then the manufacturer may can elect to run each
condenser stage individually under the tests of d) or e) or f) accordingly. In this case,
disabling the first stage system is considered to simulate the second stage running under a
stalled fan or condenser water failure test test condition of d) or e).

– 16 – IEC 61010-2-011:2019 RLV © IEC 2019
Addition:
Add the following new subclauses:
4.4.2.101 Extreme operating ambient abnormal (ABNORMAL OPERATION)
For REFRIGERATING EQUIPMENT intended to operate in a restricted environment and tested in
accordance with 4.3.1 then this additional test of ABNORMAL OPERATION shall apply to simulate
the failure of the controlled environment in the installation.
Having determined the worst case test condition for the temperature and pressure tests under
10.4.1 the unit is run under these conditions until a steady state has been achieved. The test
environment is then increased to the limits from 1.4.1 for Normal environmental conditions
(40 °C, up to 50 % RH) and the unit is allowed to stabilize and the maximum temperatures
and pressures are recorded. The operation of protective devices is permitted during this test.
If steady state conditions are not possible due to the operation of protective devices then the
maximum values recorded for this test shall be either:
– the maximum temperatures and pressures at the point of operation of non-resettable or
manually resettable device. The manually resettable device does not need to be reset
during this test; or
– the maximum temperatures and pressures achieved after the cycling of auto-resetting
protective devices. Cycling shall continue until it is clear that successive cycles will not
develop higher maximum values.
4.4.2.102 4.4.2.101 Uncontrolled cooling test
Temperature controllers shall be overridden to produce uncontrolled cooling. This applies
regardless of whether the controller controls the temperature of the equipment, heat transfer
medium or material being processed.
4.4.3.1 General
Addition:
Add a second new paragraph the following paragraph after the first paragraph:
Due Owing to the time it may can take to achieve stable conditions for a REFRIGERATING
SYSTEM, the duration of single fault tests may can be longer than 4 h unless it is clear that
stable conditions have been maintained for at least 1 h.
5 Marking and documentation
This clause of Part 1 is applicable, except as follows:
5.1.2 Identification
Addition:
Add the following new items after the note following item b):
aa) the total mass of REFRIGERANT for each separate REFRIGERANT circuit;
bb) for a single component REFRIGERANT, at least one of the following:
– the chemical name,
– the chemical formula,
– the REFRIGERANT number,
cc) for a blended REFRIGERANT, at least one of the following:
– the chemical name and nominal proportion of each of its components,
– the chemical formula and nominal proportion of each of its components,
– the REFRIGERANT number and nominal proportion of each of its components,
– the REFRIGERANT number of the REFRIGERANT blend,
NOTE 101 REFRIGERANT numbers are quoted in accordance with ISO 817 or other REFRIGERANT classification
standard, for example ANSI/ASHRAE 34.
dd) MAXIMUM ALLOWABLE PRESSURE (PS) under NORMAL CONDITION, high- and low-pressure
sides for each REFRIGERANT stage.
NOTE 102 The collation of the test results that define PS is detailed in 11.7.101.
5.1.3 MAINS supply
Replacement:
Replace the conformity statement as follows:
Conformity is checked by inspection and by measurement of the power or input current to
check the marking of 5.1.3 c). The measurement is made with the equipment in the condition
of maximum power consumption, but to exclude any initial inrush current, it is not made until
the current has stabilized (usually after 1 min). Transients are ignored. For REFRIGERATING
EQUIPMENT, the impact of extreme ambient temperatures and the interaction of any defrost
mode need to be evaluated in determining the condition of maximum power consumption.
Addition:
Add the following new symbols to Table 1:
Table 1 – Symbols
Number Symbol Reference Description
ISO 7010-W010 Warning; low temperature/freezing conditions, frostbite
(2011-05) HAZARD (MOD)
ISO 7010-W021
102 Warning; flammable material
(2011-05)
ISO 7010-W011
103 Warning; slippery surface
(2011-05)
ISO 7010-W024
104 Warning; crushing of hands
(2011-05)
5.2 Warning markings
Replacement:
Replace the first paragraph with the following:

– 18 – IEC 61010-2-011:2019 RLV © IEC 2019
Warning markings specified in this standard shall meet the following requirements.
Replace item a) by the following:
a) the perpendicular height of the triangle for all warning symbols shall be at least 15 mm.
The height of text shall be at least 1,8 mm, depending on the size of the equipment, the
legibility during NORMAL USE and the space available for the symbol. Symbols and text
shall have clear contrast in colour with the background.
Addition:
Add the following new paragraph after the last paragraph (before the conformity statement):
Warning markings or symbols for particular HAZARDS, which exist or develop only when
performing installation or maintenance of the equipment, shall be marked and visible only
when executing this particular maintenance. For example, the marking of the type of
FLAMMABLE REFRIGERANT and of the flammable insulation blowing gas, shall be visible when
gaining access to the MOTOR-COMPRESSORs, and, in the case of equipment with a remote
REFRIGERANT CONDENSING UNIT, the pipe connections. Symbol 102 of Table 1 shall be placed
on the nameplate of the unit equipment near the declaration of the REFRIGERANT type and
charge information. It shall be visible after installation of the REFRIGERATING EQUIPMENT.
5.4 Documentation
This clause of Part 1 is applicable, except as follows:
5.4.1 General
Replacement:
Replace item d) by the following:
d) the information specified in 5.4.2 to 5.4.6, 5.4.101 and 5.4.102;
5.4.3 Equipment Installation
Replacement:
Replace the note with the following text:
NOTE 1 It is recommended to add A statement in the documentation for the installation can be added to indicate
that the safety of any system incorporating the equipment is the responsibility of the assembler of the system.
Add the following new note:
NOTE 2 101 In the US, equipment containing FLAMMABLE REFRIGERANT is required to have additional instructions
– see informative Annex DD.
5.4.4 Equipment operation
Addition:
Add the following new item after 5.4.4 j):
aa) information to allow safe access during use, including identification of trip and slip
HAZARDS (see also 7.3.101 and 16.101).
Addition:
Add the following new subclauses:

5.4.101 Additional instructions for equipment with a separate REFRIGERANT
CONDENSING UNIT and intended for connection to a water supply
For equipment with a separate REFRIGERANT CONDENSING UNIT, the instructions shall include a
statement containing the substance of the following:
The installation of the REFRIGERATING EQUIPMENT and the REFRIGERANT CONDENSING UNIT shall
only be made by the manufacturer's service personnel or similarly skilled person.
The information provided with the REFRIGERATING EQUIPMENT with a separate REFRIGERANT
shall include
CONDENSING UNIT
– information on the type of separate REFRIGERANT CONDENSING UNIT to w
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