EN 60335-2-40:2003/A1:2006

SLOVENSKI STANDARD
01-julij-2006
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Household and similar electrical appliances - Safety -- Part 2-40: Particular requirements
for electrical heat pumps, air-conditioners and dehumidifiers
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke -- Teil 2-40:
Besondere Anforderungen für elektrisch betriebene Wärmepumpen, Klimageräte und
Raumluft-Entfeuchter
Appareils électrodomestiques et analogues - Sécurité -- Partie 2-40: Règles particulières
pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs
Ta slovenski standard je istoveten z: EN 60335-2-40:2003/A1:2006
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
27.080 7RSORWQHþUSDONH Heat pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60335-2-40/A1
NORME EUROPÉENNE
April 2006
EUROPÄISCHE NORM
ICS 23.120
English version
Household and similar electrical appliances -
Safety
Part 2-40: Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
(IEC 60335-2-40:2002/A1:2005, modified)

Appareils électrodomestiques  Sicherheit elektrischer Geräte für den
et analogues - Hausgebrauch und ähnliche Zwecke
Sécurité Teil 2-40: Besondere Anforderungen
Partie 2-40: Règles particulières für elektrisch betriebene Wärmepumpen,
pour les pompes à chaleur électriques, Klimageräte und Raumluft-Entfeuchter
les climatiseurs et les déshumidificateurs (IEC 60335-2-40:2002/A1:2005, modifiziert)
(CEI 60335-2-40:2002/A1:2005, modifiée)

This amendment A1 modifies the European Standard EN 60335-2-40:2003; it was approved by CENELEC on
2005-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment 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 CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CENELEC member into its own language and notified to the
Central Secretariat has the same status as the official versions.

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

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60335-2-40:2003/A1:2006 E

Foreword
A proposal to endorse a future amendment to IEC 60335-2-40:2002 based on 61D/125/CDV, document
CLC/TC 61(SEC)1471, was discussed during the Balsthal meeting of CENELEC TC 61 in June 2004,
when it was decided to submit the corresponding FDIS, document 61D/138/FDIS, to the formal vote
together with common modifications prepared by CENELEC TC 61.
The draft was circulated in March 2005 and was approved by CENELEC as Amendment A1 to
EN 60335-2-40:2003 on 2005-09-01.
The following dates are applicable:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-11-01

– date on which the national standards conflicting
(dow) 2008-09-01
with the amendment have to be withdrawn
p NOTE  In this document, p is used in the margin to indicate instructions for preparing the printed version.
________
- 3 - EN 60335-2-40:2003/A1:2006
Endorsement notice
The text of amendment 1:2005 to the International Standard IEC 60335-2-40:2002 was approved by
CENELEC as an amendment to the European Standard with agreed common modifications as given
below.
COMMON MODIFICATIONS
2 Normative references
p Add:
ASTM D 4728-01, Standard Test Method for Random Vibration Testing of Shipping Containers
3 Definitions
p Add:
3.Z101
factory sealed appliance
appliance in which all refrigerating system parts have been sealed tight by welding, brazing or a similar
permanent connection during the manufacturing process
3.Z102
single package unit
factory assembly of components of refrigeration system fixed on a common mounting to form a discrete
unit
Annex GG
p GG.2 Replace the first three lines by:
This clause is applicable to appliances with a charge amount m < M ≤ m and to non fixed factory
1 2
sealed single package units with a charge amount of m < M ≤ 2 × m .
1 1
Reference Figure GG.1.
For non fixed factory sealed single package units with a charge amount of m < M ≤ 2 × m the
1 1
requirements of GG.Z1 apply.
For other appliances with a charge amount of m < M ≤ m :
1 2
p Add after GG.7:
GG.Z1 Non fixed factory sealed single package units with a charge amount of m < M ≤ 2 × m
1 1
GG.Z1.1 For non fixed factory sealed single package units (i.e. one functional unit in one enclosure)
with a charge amount of m < M ≤ 2 × m the maximum charge in a room shall be in accordance with the
1 1,
following:
m = 0,25 × A × LFL × 2,2
max
or the required minimum floor area, A , to install an appliance with refrigerant charge M shall be in
min
accordance with the following:
A = M/(0,25 × LFL × 2,2)
min
where:
m = allowable maximum charge in a room in kg
max
M = refrigerant charge amount in the appliance in kg
A = required minimum room area in m
min
A = room area in m
LFL = Lower Flammability Limit (LFL) in kg/m , as referred in Annex BB
NOTE  The appliance can be placed at any height above the floor.
When the appliance is switched on, a fan shall operate continuously supplying a minimum airflow as
under normal steady state conditions, even when the compressor is switched off by the thermostat.
Compliance is checked by inspection.
GG.Z1.2 The appliance shall withstand the effects of dropping and vibration during transport and normal
use without leaking refrigerant.
The appliance is subjected to the tests of GG.Z1.2.1 to GG.Z1.2.4. There shall be no refrigerant leakage.
Compliance is checked by the following:
– the power input of the appliance measured after at least 1 h shall not differ by more than 10 % from
the value measured under the same conditions before the tests;
or
– the use of detection equipment having an equivalent sensitivity of 3 g/year of refrigerant shall reveal
no leaks.
NOTE 1 The tests of GG.Z1.2.1, GG.Z1.2.2 and GG.Z1.2.3 may be carried out on the appliance charged with a non-flammable
refrigerant or a non-hazardous gas.
NOTE 2 Damage of parts other than the refrigerating circuit is allowed.
GG.Z1.2.1 The appliance is tested in its final packaging for transport and shall withstand a random
vibration test for 180 min according to ASTM D 4728-01 with the following power spectral densities:

- 5 - EN 60335-2-40:2003/A1:2006
Frequency Power spectral density level
Hz g /Hz
1 0,00 005
4 0,01
16 0,01
40 0,001
80 0,001
200 0,00 001
Overall, g rms 0,52
GG.Z1.2.2 The appliance is tested in its final packaging for transport and shall withstand the following
number of drops on a horizontal hardwood board 20 mm thick placed on a concrete or similar hard
surface:
- one with the appliance held upright;
- one for each of the four edges of the bottom side, with the bottom side forming an angle of about 30°
to the horizontal.
The drop height depends on the weight of the appliance according to the following table:
Appliance weight Drop height
kg cm
< 10 80
≥ 10 and < 20 60
≥ 20 and < 30 50
≥ 30 and < 40 40
≥ 40 and < 50 30
≥ 50 20
GG.Z1.2.3 The tests of GG.Z1.2.2 are repeated on the appliance without its packaging and with the drop
height according to the following table:
Appliance weight Drop height
kg cm
< 10 20
≥ 10 and < 20 17
≥ 20 and < 30 15
≥ 30 and < 40 12
≥ 40 10
GG.Z1.2.4 The appliance is installed in accordance with the installation instructions. It is supplied at rated
voltage or at the upper limit of the rated voltage range and operated at ambient temperature.
The appliance is operated in cycles for 10 days (240 h), each cycle consisting of the compressor running
for 10 min followed by a rest period of 5 min.
This test may be made on a separate sample.

GG.Z1.3 The appliance shall be constructed so that its operation does not cause resonance points in the
piping connected to the compressor.
Compliance is checked by the following test:
The appliance is installed in accordance with the installation instructions. It is supplied at rated voltage or
at the upper limit of the rated voltage range and operated at ambient temperature.
The supply frequency is increased in steps of 1 Hz between 0,8 times and 1,2 times the rated frequency.
The vibration amplitude is measured at critical points in the piping. There shall be no sudden increase of
the amplitude when increasing the supply frequency within the specified range.
NOTE 1 The vibration amplitude can be measured, for example, by sliding an arrow gauge along the piping. The arrow gauge is an
isosceles triangle with a height equal to 10 times the base (see Figure GG.Z1) and is held against the piping with the arrow axis
perpendicular to the direction of the vibration to be measured. The amplitude is the value of A (see Figure GG.Z2) divided by 10.

Figure GG.Z1 – Isosceles triangle arrow test gauge

Figure GG.Z2 – Measurement of vibration amplitude
NOTE 2 Critical points are those with a bigger vibration amplitude.
This test may be made on a separate sample.

NORME CEI
INTERNATIONALE
IEC
60335-2-40
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT 1
2005-03
Amendement 1
Appareils électrodomestiques et analogues–
Sécurité –
Partie 2-40:
Règles particulières pour les pompes
à chaleur électriques, les climatiseurs
et les déshumidificateurs
Amendment 1
Household and similar electrical appliances –
Safety –
Part 2-40:
Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
V
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60335-2-40 Amend. 1  IEC:2006 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 61D: Appliances for air-conditioning for
household and similar purposes, of IEC technical committee 61: Safety of household and
similar electrical appliances.
This bilingual version (2006-05) replaces the English version.
The text of this amendment is based on the following documents:
FDIS Report on voting
61D/138/FDIS 61D/140/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The French version of this standard has not been voted upon.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
___________
CONTENTS
Add the titles of new Annexes BB to GG as follows:
Annex BB (normative) Selected information about refrigerants
Annex CC (informative) Transportation, marking and storage for units that employ flammable
refrigerants
Annex DD (normative) Service operations
Annex EE (normative) Pressure tests
Annex FF (normative) Leak simulation tests
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits
1 Scope
Delete the word "sealed" from the first paragraph.
Add, after the second paragraph, the following new paragraph:
This standard also applies to electric heat pumps, air conditioners and dehumidifiers
containing flammable refrigerant. Flammable refrigerants are defined in 3.121.

60335-2-40 Amend. 1  IEC:2006 – 5 –
Replace the existing Note 101 by the following:
NOTE 101 A definition of ‘motor-compressor’ is given in IEC 60335-2-34, which includes the statement that the
term motor-compressor is be used to designate either a hermetic motor-compressor or semi-hermetic motor-
compressor.
Add, after Note 102, the following new paragraph:
This standard does not take into account chemicals other than group A1, A2, or A3 as defined
by 3.121.
Replace the existing Note 103 by the following:
NOTE 103 This standard specifies particular requirements for the use of flammable refrigerants. Unless
specifications are covered by this standard, including the annexes, requirements for refrigerating safety are
covered by ISO 5149.
The sections and clauses in ISO 5149 of particular concern to this standard are as follows:
– Section 3: Design and construction of equipment applies to all appliances and systems.
– Section 4: Requirements for utilization applies to appliances and systems which are for “similar electrical
appliances”, i.e. commercial and light industrial.
– Section 5: Operating procedures applies to appliances and systems which are for “similar electrical appliances”,
i.e. commercial and light industrial.
Replace, in Note 4, the last dashed item by the following:
– in many countries additional requirements are specified, for example, by the national health authorities
responsible for the protection of labour and the national authorities responsible for storage, transportation,
building constructions and installations.
2 Normative references
The clause of Part 1 is applicable except as follows.
Add to the existing list the titles of the following standards:
IEC 60079-14, Electrical apparatus for explosive gas atmospheres – Part 14: Electrical
installations in hazardous areas (other than mines)
IEC 60079-15:2001, Electrical apparatus for explosive atmospheres – Part 15: Type of
protection “n”
ISO 817:1974, Organic refrigerants – number designation
1)
ISO 3864:1984, Safety colours and safety signs
ISO 5149:1993, Mechanical refrigerating systems used for cooling and heating – Safety
requirements
ISO 7000, Graphical symbols for use on equipment – Index synopsis
ANSI/ASHRAE 34:2001, Designation and safety classification of refrigerants
———————
1)
ISO 3864:1984 has been replaced by ISO 3864-1 2002, Graphical symbols – Safety colours and safety signs –
Part 1: Design principles for safety signs in workplaces and public areas and ISO 7010:2003, Graphical
symbols – Safety colours and safety signs -- Safety signs used in workplaces and public areas. However the
safety sign referred to here in ISO 3864 (symbol B.3.2, Caution, risk of fire) is no longer contained in either ISO

3864-1 or ISO 7010.
60335-2-40 Amend. 1  IEC:2006 – 7 –
3 Definitions
Add the following new definitions:
3.121
flammable refrigerant
refrigerant with a classification of class A2 or A3 in compliance with ANSI/ASHRAE 34-2001
[ISO 817] classification.
3.122
refrigerating system
combination of interconnected refrigerant containing parts constituting one closed refrigerant
circuit in which refrigerant is circulated for the purpose of extracting heat at the low
temperature side to reject heat at the high temperature side by changing the state of the
refrigerant
3.123
maximum allowable pressure
a limit to the refrigerating system operating pressure, generally the maximum pressure for
which the equipment is designed, as specified by the manufacturer
NOTE Maximum allowable pressure constitutes a limit to the operating pressure whether the equipment is
working or not, see Clause 21.
3.124
low-pressure side
the part(s) of a refrigerating system operating at the evaporator pressure
3.125
high-pressure side
the part(s) of a refrigerating system operating at the condenser pressure
3.126
service port
a means to access the refrigerant in a refrigerating system for the purpose of charging or
servicing the system, typically a valve, tube extension or entry location
5 General conditions for the tests
Add the following subclause:
5.2 Addition:
The testing of Clause 21 may be carried out on separate samples. The testing of Clauses 11,
19 and 21 shall require that pressure measurements be made at various points in the
refrigerating system.
At least one additional specially prepared sample is required for the tests of Annex FF (Leak
simulation tests), if that test option is selected.
The temperatures on the refrigerant piping should be measured during the test of Clause 11.
NOTE Due to the potentially hazardous nature of the tests of Clause 21 and Annexes EE and FF, special
precautions need to be taken when carrying out the tests.

60335-2-40 Amend. 1  IEC:2006 – 9 –
5.102 Motor compressors that are tested and comply with IEC 60335-2-34 need not be
additionally tested for Clause 21.
7 Marking and instructions
7.1 Modification:
Add the following paragraphs to the existing addition:
The flame symbol and the instruction manual symbol of 7.6 shall be visible when a flammable
refrigerant is employed and the following conditions exist:
– accessing parts expected to be subjected to maintenance or repair;
– observing the appliance under sale or installed conditions;
– observing the appliance packaging, if the appliance is charged with refrigerant.
If a flammable refrigerant is used, the symbols for “read operator’s manual”, “operator’s
manual; operating instructions” and “service indicator; read technical manual” (symbols 0790,
1641 and 1659 of ISO 7000) shall be placed on the appliance in a location visible to the
persons required to know the information. The perpendicular height shall be at least 10 mm.
An additional warning symbol (flame symbol: B.3.2 of ISO 3864) shall be placed on the
nameplate of the unit near the declaration of the refrigerant type and charge information. The
perpendicular height shall be at least 10 mm, and the symbol need not be in colour.
NOTE 101 When installed, the marking should be visible after removing a detachable part.
The following warning shall also be applied to the appliance when a flammable refrigerant is
employed.
WARNING
Appliance shall be installed, operated and stored in a room with a floor area larger than
‘X’ m (only applies to appliances that are not fixed appliances).
For appliances which are not fixed appliances, the minimum room size X shall be specified
on the appliance. The X in the marking shall be determined in m by the procedure described
in Annex GG.2 for unventilated areas and the X in the marking shall be 4 if the refrigerant
charge of the appliance is less than m (see GG.1.1).
The maximum allowable pressure for the low-pressure side and the high-pressure side
shall be marked on the product.
NOTE 102 For the refrigerating system; if the maximum allowable pressure of the low-pressure side and the
high-pressure side is the same, a single indication is permitted.
If not already visible when accessing a service port and if a service port is provided, the
service port shall be marked to identify the type of refrigerant. If the refrigerant is flammable,
symbol B.3.2 of ISO 3864, shall be included, without specifying the colour.

60335-2-40 Amend. 1  IEC:2006 – 11 –
Add the following subclause:
7.6 Addition:
When a flammable refrigerant is employed, a warning symbol B.3.2 of ISO 3864, including
colour and format, shall be permanently placed on the appliance. The perpendicular height of
the triangle containing the "Caution, risk of fire" symbol shall be at least 30 mm.
When a flammable refrigerant is employed, a symbol requiring reference to the manual
[0790 of ISO 7000], including colour and format, shall be permanently placed on the
appliance.
7.12 Addition:
For appliances using flammable refrigerants, an installation, service and operation manual,
either separate or combined manuals, shall be provided and include the information given in
Annex DD.
19 Abnormal operation
Add the following subclause after Subclause 19.10:
19.10.1 The test of 19.10 is repeated on class 01 appliances and class 1 appliances
incorporating tubular sheathed or embedded heating elements. However, controls are not
short-circuited but one end of the element is connected to the sheath of the heating element.
The test is repeated with the polarity of the supply to the appliance reversed and with the
other end of the element connected to the sheath.
The test is not carried out on appliances intended to be permanently connected to fixed wiring
and on appliances where all-pole disconnection occurs during the test of 19.10.
19.14 Amend the opening of the first sentence to read:
"During the tests of 19.2 to 19.10.1 and 19.11."
21 Mechanical strength
Add the following paragraph:
Safety requirements specified in Annex EE shall apply. The pressure test in Annex EE applies
to parts other than pressure vessels.
22 Construction
Add the following new subclauses:
22.112 The construction of the refrigerating system shall comply with the requirements of
Section 3 of ISO 5149.
22.113 When a flammable refrigerant is used, refrigerant tubing shall be protected or
enclosed to avoid mechanical damage. The tubing shall be protected to the extent that it will
not be handled or used for carrying during moving of the product. Tubing located within the
confines of the cabinet is considered to be protected from mechanical damage.

60335-2-40 Amend. 1  IEC:2006 – 13 –
Compliance is checked by inspection.
22.114 When a flammable refrigerant is used, low temperature solder alloys, such as
lead/tin alloys, are not acceptable for pipe connections.
22.115 The total refrigerant mass (M) of all refrigerating systems within the appliance
employing flammable refrigerants, shall not exceed m as defined in Annex GG.
22.116 Appliances using flammable refrigerants shall be constructed so that any leaked
refrigerant will not flow or stagnate so as to cause a fire or explosion hazard in areas within
the appliance where electrical components, which could be a source of ignition and which
could function under normal conditions or in the event of a leak, are fitted.
Separate components, such as thermostats, which are charged with less than 0,5 g of a
flammable gas are not considered to cause a fire or explosion hazard in the event of leakage
of the gas within the component itself.
All electrical components that could be a source of ignition and which could function under
normal conditions or in the event of a leak, shall comply with one of the following.
– IEC 60079-15:2001, Clauses 9 to 26, for group IIA gases or the refrigerant used or an
applicable standard that makes electrical components suitable for use in Zone 2, 1 or 0 as
defined in IEC 60079-14.
– Not be located in an area where a potentially flammable gas mixture will accumulate as
demonstrated by the test of Annex FF.
– Be located in an enclosure. The enclosure containing the electrical components shall
comply with IEC 60079-15:2001 for enclosures suitable for use with group IIA gases or the
refrigerant used.
NOTE The test current for a switching component is the rated current of the component or the actual load to be
switched, whichever is greater.
22.117 Temperatures on surfaces that may be exposed to leakage of flammable
refrigerants shall not exceed the auto-ignition temperature of the refrigerant reduced by
100 K; some typical values are given in Annex BB.
Compliance is checked by measuring the appropriate surface temperatures during the tests of
Clauses 11 and 19, except those which during the tests of Clause 19 are terminated in a non-
self-resetting way.
22.118 When a flammable refrigerant is used, all appliances shall be charged with
refrigerant at the manufacturing location or charged on site as recommended by the
manufacturer.
A part of an appliance that is charged on site, which requires brazing or welding in the
installation shall not be shipped with a flammable refrigerant charge. Joints made in the
installation between parts of the refrigerating system, with at least one part charged, shall
be made in accordance with the following.
– A brazed, welded, or mechanical connection shall be made before opening the valves to
permit refrigerant to flow between the refrigerating system parts. A vacuum valve shall
be provided to evacuate the interconnecting pipe and/or any uncharged refrigerating
system part.
60335-2-40 Amend. 1  IEC:2006 – 15 –
– Reusable mechanical connectors and flared joints are not allowed indoors.
– Refrigerant tubing shall be protected or enclosed to avoid damage.
Flexible refrigerant connectors (such as connecting lines between the indoor and outdoor unit)
that may be displaced during normal operations shall be protected against mechanical
damage.
Compliance is checked according to the manufacturer’s installation instructions and a trial
installation if necessary.
Annexes
Add the following new annexes:

60335-2-40 Amend. 1  IEC:2006          – 17 –

Annex BB
(normative)
Selected information about refrigerants
The normative component of this annex involves the “Lower limit” column of Table BB.1. The rest of the annex is informative.

60335-2-40 Amend. 1  IEC:2006          – 19 –

Table BB.1 − Selected information about refrigerants
(2)
Refrigerant Description Formula Auto-ignition Density Molar Lower flammability limit
(1) (3)
designation temperatures (2),(5) mass
3(4)
3 kg/m % v/v
kg/m kg/kmol
°C
(7)
R32 Difluoromethane CH F 648 2,13 52,0 0,306 14,4
2 2
(8)
R50 Methane CH 645 0,65 16,0 0,032 4,9
(7)
R143a 1,1,1 – Trifluoroethane CF CH 750 3,43 84,0 0,282 8,2
3 3
(7)
R152a 1, 1 – Difluoroethane CHF CH 455 2,70 66,0 0,130 4,8
2 3
(7)
R170 Ethane CH CH 515 1,23 30,1 0,038 3,1
3 3
(7)
R290 Propane CH CH CH 470 1,80 44,1 0,038 2,1
3 2 3
(9)
R600 n-Butane CH CH CH CH 365 2,37 58,1 0,043 1,8
3 2 2 3
(10)
R600a Isobutane CH(CH ) 460 2,37 58,1 0,043 1,8
3 3
(7)
R1150 Ethylene CH =CH 425 1,15 28,1 0,036 3,1
2 2
(11)
R1270 Propylene CH =CHCH 455 1,72 42,1 0,040 2,3
2 3
(12)
E170 Dimethylether CH °CH 235 1,88 46,1 0,064 3,4
3 3
(6) (7)
R142b 1-chloro-1,1-difluoroethane CH CClF 750 4,11 100,5 0,329 8,0
3 2
(1) The refrigerant designations are in accordance with ISO 817.
(2) These values are at 25 °C and at 1 013,2 mbar.
(3) For comparison, the molecular mass of air is taken equal to 28,8 kg/kmol.
(4) Multiply % v/v by the corresponding molar mass * 0,000 409 to give the flammability limit in kg/m .
(5) Divide molar mass by 24,465 to give the density in kg/m3.
(6) Estimated from molecular structure
(7) WILSON, DP. and Richard, RG. Determination of Refrigerant Lower Flammability Limits in Compliance with Proposed Addendum p to Standard 34. ASHRAE
Transactions: 2002 V. 108, Pt. 2
(8) BURRELL, GA. and OBERFELL, GG. U.S. Bur. Mines, Tech. Paper 119, (1915)
(9) LAFFITTE, P. and DELBOURGO, R. 4th Symp. on Combust., p.114 (1953)
(10) ZABETAKIS, MG., SCOTT, GS., JONES, GW. Ind. Eng. Chem., 43, 2120, (1951)
(11) Estimated from LFL for propane analogs and data from JABBOUR, T., CLODIC, D. Burning Vel °City and Refrigerant Flammability Classification, Ecole de
Mines, Paris, France, ASHRAE Transactions 2004.
(12) Atofina application to ASHRAE for safety classification of R-E170, 13 December 2001

60335-2-40 Amend. 1  IEC:2006 – 21 –
Annex CC
(informative)
Transportation, marking and storage for units
that employ flammable refrigerants

The following information is provided for units that employ flammable refrigerants:
CC.1 Transport of equipment containing flammable refrigerants
Attention is drawn to the fact that additional transportation regulations may exist with respect
to equipment containing flammable gas. The maximum number of pieces of equipment or the
configuration of the equipment, permitted to be transported together will be determined by the
applicable transport regulations.
CC.2 Marking of equipment using signs
Signs for similar appliances used in a work area generally are addressed by local regulations
and give the minimum requirements for the provision of safety and/or health signs for a work
location.
All required signs are to be maintained and employers should ensure that employees receive
suitable and sufficient instruction and training on the meaning of appropriate safety signs and
the actions that need to be taken in connection with these signs.
The effectiveness of signs should not be diminished by too many signs being placed together.
Any pictograms used should be as simple as possible and contain only essential details.
CC.3 Disposal of equipment using flammable refrigerants
See National Regulations.
CC.4 Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer’s instructions.
CC.5 Storage of packed (unsold) equipment
Storage package protection should be constructed such that mechanical damage to the
equipment inside the package will not cause a leak of the refrigerant charge.
The maximum number of pieces of equipment permitted to be stored together will be
determined by local regulations.

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Annex DD
(normative)
Service operations
DD.1 General
For appliances using flammable refrigerants, an installation, service and operation manual,
in the form of either separate or combined manuals, shall be provided and shall include the
following information.
DD.2 Symbols
The symbol referred to in 7.6 (without colours is permitted) and the information of the warning
marking shall be provided as follows:
WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by
the manufacturer.
The appliance shall be stored in a room without continuously operating ignition sources (for
example: open flames, an operating gas appliance or an operating electric heater.
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Appliance shall be installed, operated and stored in a room with a floor area larger than X m .
NOTE The manufacturer may provide other suitable examples or may provide additional information about the
refrigerant odour.
DD.3 Information in manual
DD.3.1 The following information shall be specified in the manual where the information is
needed for the function of the manual and as applicable to the appliance:
– information for spaces where pipes containing flammable refrigerant are allowed, including
statements
• that the installation of pipe-work shall be kept to a minimum;
• that pipe-work shall be protected from physical damage and shall not be installed in an
unventilated space, if that space is smaller than A in Annex GG;
min
• that compliance with national gas regulations shall be observed;
• that mechanical connections made in accordance with 22.118, shall be accessible for
maintenance purposes;
• that the minimum floor area of the room shall be mentioned in the form of a table or a
single figure without reference to a formula;
– the maximum refrigerant charge amount (M);
– the minimum rated airflow, if required by Annex GG;
– information for handling, installation, cleaning, servicing and disposal of refrigerant;

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– the minimum floor area of the room or the special requirements for the room in which the
appliance can be located as defined in Annex GG, except where the refrigerant charge (M)
is less than or equal to m (M ≤ m );
1 1
– a warning to keep ventilation openings clear of obstruction;
– a notice that servicing shall be performed only as recommended by the manufacturer.
DD.3.2 The manual shall include a statement advising that an unventilated area where the
appliance using flammable refrigerants is installed shall be so constructed that should any
refrigerant leak, it will not stagnate so as to create a fire or explosion hazard. This shall
include:
– a warning that the appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation;
– a warning that the appliance shall be stored in a room without continuously operating open
flames (for example an operating gas appliance) and ignition sources (for example an
operating electric heater).
NOTE The manufacturer should specify other potential continuously operating sources known to cause ignition of
the refrigerant used.
The appliance shall be stored so as to prevent mechanical damage from occurring.
DD.3.3 The manual shall contain specific information about the credentials of qualified
service personnel as follows.
– Any person who is involved with working on or breaking into a refrigerant circuit should
hold a current valid certificate from an industry-accredited assessment authority, which
authorises their competence to handle refrigerants safely in accordance with an industry
recognised assessment specification.
– Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be carried
out under the supervision of the person competent in the use of flammable refrigerants.
DD.4 Information on servicing
The manual shall contain specific information for service personnel who shall be instructed to
undertake the following when servicing an appliance that employs a flammable refrigerant.
DD.4.1 Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are
necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating
system, the following precautions shall be complied with prior to conducting work on the
system.
DD.4.2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of a
flammable gas or vapour being present while the work is being performed.

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DD.4.3 General work area
All maintenance staff and others working in the local area shall be instructed on the nature of
work being carried out. Work in confined spaces shall be avoided. The area around the
workspace shall be sectioned off. Ensure that the conditions within the area have been made
safe by control of flammable material.
DD.4.4 Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to
ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak
detection equipment being used is suitable for use with flammable refrigerants, i.e. non-
sparking, adequately sealed or intrinsically safe.
DD.4.5 Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts,
appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or
CO fire extinguisher adjacent to the charging area.
DD.4.6 No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any
pipe work that contains or has contained flammable refrigerant shall use any sources of
ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition
sources, including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which flammable refrigerant can possibly
be released to the surrounding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards or ignition
risks. “No Smoking” signs shall be displayed.
DD.4.7 Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the
system or conducting any hot work. A degree of ventilation shall continue during the period
that the work is carried out. The ventilation should safely disperse any released refrigerant
and preferably expel it externally into the atmosphere.
DD.4.8 Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the
correct specification. At all times the manufacturer’s maintenance and service guidelines shall
be followed. If in doubt, consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
– the charge size is in accordance with the room size within which the refrigerant containing
parts are installed;
– the ventilation machinery and outlets are operating adequately and are not obstructed;

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– if an indirect refrigerating circuit is being used, the secondary circuit shall be checked for
the presence of refrigerant;
– marking to the equipment continues to be visible and legible. Markings and signs that are
illegible shall be corrected;
– refrigeration pipe or components are installed in a position where they are unlikely to be
exposed to any substance which may corrode refrigerant containing components, unless
the components are constructed of materials which are inherently resistant to being
corroded or are suitably protected against being so corroded.
DD.4.9 Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and
component inspection procedures. If a fault exists that could compromise safety, then no
electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault
cannot be corrected immediately but it is necessary to continue operation, an adequate
temporary solution shall be used. This shall be reported to the owner of the equipment so all
parties are advised.
Initial safety checks shall include:
• that capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparking;
• that there no live electrical components and wiring are exposed while charging, recovering
or purging the system;
• that there is continuity of earth bonding.
DD.5 Repairs to sealed components
DD.5.1 During repairs to sealed components, all electrical supplies shall be disconnected
from the equipment being worked upon prior to any removal of sealed covers, etc. If it is
absolutely necessary to have an electrical supply to equipment during servicing, then a
permanently operating form of leak detection shall be located at the most critical point to warn
of a potentially hazardous situation.
DD.5.2 Particular attention shall be paid to the following to ensure that by working on
electrical components, the casing is not altered in such a way that the level of protection is
affected. This shall include damage to cables, excessive number of connections, terminals not
made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded such that they no longer serve the
purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in
accordance with the manufacturer’s specifications,
NOTE The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.

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DD.6 Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that
this will not exceed the permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the
presence of a flammable atmosphere. The test apparatus shall be at the correct rating.
Replace components only with parts specified by the manufacturer. Other parts may result in
the ignition of refrigerant in the atmosphere from a leak.
DD.7 Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp
edges or any other adverse environmental effects. The check shall also take into account the
effects of aging or continual vibration from sources such as compressors or fans.
DD.8 Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or
detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall
not be used.
DD.9 Leak detection methods
The following leak detection methods are deemed acceptable for systems containing
flammable refrigerants.
Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity
may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in
a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is
suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the
LFL of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate
percentage of gas (25 % maximum) is confirmed.
Leak detection fluids are suitable for use with most refrigerants but the use of detergents
containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode
the copper pipe-work.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be
recovered from the system, or isolated (by means of shut off valves) in a part of the system
remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through the system
both before and during the brazing process.
DD.10 Removal and evacuation
When breaking into the refrigerant circuit to make repairs – or for any other purpose –
conventional procedures shall be used. However, it is important that best practice is followed
since flammability is a consideration. The following procedure shall be adhered to:

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• remove refrigerant
...