Detail of GB/T 4706.44-2024

Introduction of GB/T 4706.44-2024

Safety of household and similar electrical appliances-Part 44 : Particular requirements for thermal-storage room heaters 1 Scope This clause of GB/T 4706.1-2024 is replaced by the following. This standard deals with particular requirements for the safety of electric thermal-storage room heaters for household and similar purposes. This standard applies to the single-phase appliances with their rated voltage being not more than 250 V for and other appliances with their rated voltage being not more than 480 V. It also applies to the appliances not intended for normal household use but which nevertheless may 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. This standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account: – persons (including children) whose • physical, sensory or mental capabilities; or • lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; – children playing with the appliance. Note 101: Attention is drawn to the fact that – this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a guide, in so far as it reasonably applies, to determine the requirements and test specifications for other thermal-storage room heaters; – for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable; – for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; – in many countries additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities. Note 102: This standard does not apply to – appliances intended exclusively for industrial purposes; – heaters incorporated in the building structure; – central heating systems; – heaters for saunas (GB/T 4706.31); – flexible sheet heating elements for room heating (GB/T 4706.82); – heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). 2 Normative references This clause of GB/T 4706.1-2024 is applicable except as follows. Addition: ISO 3864-1 Graphical symbols - Safety colours and safety signs- Part 1: Design principles for safety signs and, safety markings Note: GB/T 2893.1-2013 Graphical symbols - Safety colours and safety signs - Part 1 : Design principles for safety signs and safety markings (ISO 3864-1:2011, MOD) IEC 60335-2-30 Household and similar electrical appliances - Safety- Part 2- 30: Particular requirements for room heaters Note: GB/T 4706.23-2024 Safety of household and similar electrical appliances - Part 23 : Particular requirements for room heaters (IEC 60335-2-30:2021, IDT) 3 Definitions This clause of GB/T 4706.1-2024 is applicable except as follows. 3.1.9 Replacement: normal operation operation of the appliance under the following conditions The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a charging period and a discharging period. The charging period is terminated when all heating elements are disconnected for the first time by the devices controlling the temperature of the core (charge controls). 3.101 thermal-storage room heater heater constructed to store heat obtained from electrical energy in a heat-accumulating core and to discharge it at any time 3.102 controlled-output heater thermal-storage room heater, the heat output of which can be controlled by means such as fans, shutters or flaps 3.103 free-output heater thermal-storage room heater, the heat output of which is discharged by natural convection and radiation and can only be varied by adjusting the charge 3.104 rated charging period longest uninterrupted charging period assigned to the heater by the manufacturer 3.105 rated charge energy consumption assigned to the heater by the manufacturer for a rated charging period 4 General requirement This clause of GB/T 4706.1-2024 is applicable. 5 General conditions for the tests This clause of GB/T 4706.1-2024 is applicable except as follows. 5.5 Addition: For controlled-output heaters having auxiliary air-outlets, air is discharged only through the main outlet into the room where the heater is situated. Note 101: Movable parts include accessories supplied with the heater, such as shelves and humidifiers. 5.6 Addition: Thermostats sensitive to the room air temperature, such as those having a sensing element located in the air-inlet, are short-circuited. 5.9 Addition: When it is specified that direct-acting heating elements are operated together with the storage heating elements, this only applies if allowed by the construction. 6 Classification This clause of GB/T 4706.1-2024 is applicable except as follows. 6.1 Modification: Thermal-storage room heaters shall be class I, class II or class III. 7 Marking and instructions This clause of GB/T 4706.1-2024 is applicable except as follows. 7.1 Modification: Appliances shall be marked with rated power input. Addition: Appliances shall be marked with – the rated charging period, in hours; – the mass of the assembled appliance, in kilograms. For appliances provided with more than one means of connection to the supply, each supply circuit shall be marked with rated voltage, rated power input and the symbol for nature of supply. If the temperature rises determined during the tests of Clause 19 exceed the limits specified in Clause 11, appliances shall be marked with symbol GB/T 5465.2-2023-5641 combined with the prohibition sign of ISO 3864-1, except for colours, or with the substance of the following: WARNING: Do not cover. Note 101: This marking may be on a label that is permanently attached to the appliance. 7.6 Addition: Do not cover Note: This symbol incorporates symbol GB/T 5465.2-2023-5641 combined with the prohibition sign of ISO 3864-1, except for colours. 7.10 Addition: Charging controls shall not be marked with the off position unless they have a contact separation in all poles to provide full disconnection under overvoltage category III conditions. However, disconnection of the neutral pole is not required for single phase appliances permanently connected to a system with an earthed neutral (TN-S-C system).

Contents of GB/T 4706.44-2024