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IEC 60335-2-40-2022.pdf
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IEC 60335-2-40
Edition 7.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-
conditioners and
dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques, les
climatiseurs et les déshumidificateurs
IEC 60335-2-40:2022-05(en-fr)
®
colour
inside
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IEC 60335-2-40
Edition 7.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-
conditioners and
dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques, les
climatiseurs et les déshumidificateurs
colour
inside
– 2 – IEC 60335-2-40:2022 © IEC 2022
CONTENTS
FOREWORD ........................................................................................................................... 5
INTRODUCTION ..................................................................................................................... 8
1 Scope .............................................................................................................................. 9
2 Normative references .................................................................................................... 10
3 Terms and definitions .................................................................................................... 11
4 General requirement ...................................................................................................... 19
5 General conditions for the tests ..................................................................................... 19
6 Classification ................................................................................................................. 20
7 Marking and instructions ................................................................................................ 20
8 Protection against access to live parts ........................................................................... 26
9 Starting of motor-operated appliances ........................................................................... 26
10 Power input and current ................................................................................................. 26
11 Heating .......................................................................................................................... 26
12 Void ............................................................................................................................... 29
13 Leakage current and electric strength at operating temperature ..................................... 29
14 Transient overvoltages .................................................................................................. 29
15 Moisture resistance ....................................................................................................... 29
16 Leakage current and electric strength ............................................................................ 31
17 Overload protection of transformers and associated circuits .......................................... 31
18 Endurance ..................................................................................................................... 31
19 Abnormal operation ....................................................................................................... 31
20 Stability and mechanical hazards ................................................................................... 38
21 Mechanical strength ...................................................................................................... 38
22 Construction .................................................................................................................. 39
23 Internal wiring ................................................................................................................ 51
24 Components .................................................................................................................. 51
25 Supply connection and external flexible cords ............................................................... 52
26 Terminals for external conductors .................................................................................. 53
27 Provision for earthing .................................................................................................... 53
28 Screws and connections ................................................................................................ 53
29 Clearances, creepage distances and solid insulation ..................................................... 53
30 Resistance to heat and fire ............................................................................................ 53
31 Resistance to rusting ..................................................................................................... 55
32 Radiation, toxicity and similar hazards ........................................................................... 55
Annexes ............................................................................................................................... 62
Annex D (normative) Thermal motor protectors .................................................................... 62
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance ........................................................................................................ 62
Annex AA (informative) Examples for operating temperatures of the appliance .................... 63
Annex BB (normative) Selected information about refrigerants ............................................. 64
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants .......................................................................................................... 68
IEC 60335-2-40:2022 © IEC 2022 – 3 –
Annex DD (normative) Requirements for installation, service, maintenance and repair,
and decommissioning manuals of appliances using flammable refrigerants ........................... 69
Annex EE (normative) Pressure tests ................................................................................... 78
Annex FF (normative) Leak simulation tests ......................................................................... 80
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits ................................................................................................................. 82
Annex HH (informative) Competence of service personnel ................................................. 115
Annex II (Void) .................................................................................................................... 117
Annex JJ (normative) Allowable openings of relays and similar components to prevent
ignition of A2L refrigerants .................................................................................................. 118
Annex KK (normative) Test method for hot surface ignition temperature for A2L ................ 120
Annex LL (normative) Refrigerant detection systems for flammable refrigerants ................. 124
Annex MM (normative) Refrigerant sensor location confirmation test ................................. 135
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants ........... 138
Annex OO (Void) ................................................................................................................ 140
Annex PP (normative) Leak detection system confirmation test for flammable
refrigerants ......................................................................................................................... 141
Annex QQ (normative) Methods for determining releasable charge .................................... 147
Bibliography ........................................................................................................................ 155
Figure 101 – Example of label for field charged units ............................................................ 57
Figure 102 – Arrangement for heating test of appliances with supplementary air heater ........ 59
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test .................................................................................. 60
Figure 104 – Power spectral density profile for vibration test in 21.101 ................................. 60
Figure 105 – Dimensional details for the weight in the area of the pressure ball .................... 60
Figure 106 – Measurement before and after the test ............................................................. 61
Figure GG.1 – Unventilated area......................................................................................... 112
Figure GG.2 – Mechanical ventilation ................................................................................. 112
Figure GG.3 – Relevant heights h
inst
, h
0
and h
rel
for calculation of A
min
and m
max
......... 113
Figure GG.4 – Airflow direction ........................................................................................... 114
Figure KK.1 – Front view of test apparatus labels ............................................................... 120
Figure KK.2 – Test apparatus with dimensions .................................................................... 121
Figure KK.3 – Top view of test apparatus ............................................................................ 122
Figure LL.1 – Example of test chamber design .................................................................... 130
Table 101 – Power spectral density profile for vibration test .................................................. 38
Table 102 – UVC spectral irradiance measurement location .................................................. 56
Table AA.1 – Examples for operating temperatures of the appliance ..................................... 63
Table BB.1 – Selected information about refrigerants............................................................ 64
Table DD.1 – Mandatory clauses in each manual .................................................................. 69
Table GG.1 – Outline of Annex GG (informative)................................................................... 83
Table GG.2 – Circulation airflow ........................................................................................... 88
Table GG.3 – Appliance with packaging ................................................................................ 95
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