GB/T 4706.32-2024Safety of household and similar electrical appliances - Part 32: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.

This Document is Part 32 of GB/T 4706 Safety of Household and Similar Electrical Appliances.

GB/T 4706 has published the following parts.

--- Part 1.General requirements;

--- Part 2.Particular requirements for electric irons;

--- Part 121.Particular requirements for professional ice-cream makers.

This Document replaced GB 4706.32-2012 Household and Similar Electrical Appliances –

Safety – Particular Requirements for Heat Pumps, Air-Conditioners and Dehumidifiers.

Compared with GB 4706.32-2012, the major technical changes of this Document are as follows

besides structural adjustments and editorial modifications.

--- Change the applicable voltage range of single-phase appliances (see Clause 1 of this

Edition; Clause 1 of the 2012 Edition);

--- Add some units; clarify that thermoelectric heat pumps, dehumidifiers with and without

compressors are within the scope of the standard (see Clause 1 of this Edition);

--- Add the provisions on the scope of refrigerants applicable to this Document (see Clause

1 of this Edition);

--- Add more than 30 terms and definitions such as "particle foam material", "factory sealed

single package unit", "pre-charged pipe sets", etc. (see 3.127~3.165 of this Edition);

--- Delete the terms and definitions such as "comfort dehumidification", "process

dehumidification", and "heat recovery dehumidification" (see 3.105~3.107 of the 2012

Edition);

--- Add the refrigerant pipe length during testing (see 5.10 of this Edition);

--- Change the flame symbol of flammable refrigerants; add the minimum room area symbol;

add leakage monitoring devices, electric safety protection measures and other related

instructions (see Clause 7 of this Edition; Clause 7 of the 2012 Edition);

--- Add pressure symbols; add trans-critical refrigeration system related instructions (see

Clause 7 of this Edition);

--- Add UV-C germicidal lamp system requirements (see Clause 7 of this Edition);

--- Add some unit instructions related requirements (see Clause 7 of this Edition);

--- Add installation position requirements for panel or cover installation tests (see 8.1.5 of

this Edition);

--- Add testing procedures of the heating test (see Clause 11 of this Edition);

--- Change the leakage current requirements for stationary Class I appliances (see Clauses

13 and 16 of this Edition; Clauses 13 and 16 of the 2012 Edition);

--- Add related requirements for supplementary air heaters (see 19.104 of this Edition);

--- Add abnormal tests for dehumidifiers (see 19.105 of this Edition);

--- Add related requirements for particle foam materials (see 21.2 of this Edition);

--- Add vibration tests during transportation of appliances using flammable refrigerants (see

2012 Edition);

--- Change related requirements for indoor mechanical joints (see 22.118 of this Edition;

1 Scope

This clause of GB/T 4706.1-2024 is replaced by the following.

This Document specifies the safety requirements for household and similar heat pumps, air

conditioners and dehumidifiers.

This Document deals with the safety of electric heat pumps, sanitary hot water heat pumps

and air conditioners, incorporating motor-compressors as well as hydronic fan coils units,

dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial

units. Their maximum rated voltage being no more than 300 V for single phase appliances and

600 V for multi-phase appliances.

Appliances not intended for normal household use but which nevertheless can be a source of

danger to the public, such as appliances intended to be used by laymen in shops, in light industry

and on farms, are within the scope of this Document.

The appliances referenced above can consist of one or more factory-made assemblies. If

provided in more than one assembly, the separate assemblies are used together, and they are

based on the use of matched assemblies specified in the technical requirements of this

Document.

NOTE 101.A definition of 'motor-compressor' is given in IEC 60335-2-34, which includes the statement

that the term motor-compressor is used to designate either a hermetic motor-compressor or semi-hermetic

motor-compressor.

NOTE 102.Requirements for containers intended for storage of the heated water included in sanitary

hot water heat pumps are, in addition, covered by IEC 60335-2-21.

This Document does not take into account refrigerants other than group A1, A2L, A2 and A3

as defined by ISO 817.Flammable refrigerants are limited to those of a molar mass of more

than or equal to 42 kg/kmol based on WCF (worst case formulation) as specified in ISO 817.

As far as practical, this Document deals with common hazards presented by appliances that are

encountered in normal use and assumes that installation, servicing, decommissioning, and

disposal are safely handled by competent persons and accidental release of refrigerants is

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