Automatic electrical controls for household and similar use – Part 2-8: Particular requirements for electrically operated water valves, including mechanical requirements
|Publication Date:||1 January 2017|
|ICS Code (Automatic controls for household use):||97.120|
This standard applies to electric heating appliances and electric motor-operated or magnetically-driven appliances for household and similar purposes.
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, are within the scope of this standard.
Examples of such appliances are appliances for hairdressers, soldering irons, glue pots, sterilizers, infra-red radiation appliances, feed boilers, water pumps and lawn mowers. Except in so far as this standard deals with electric toys, it does not take into account the special hazards which exist in nurseries and other places where there are young children or aged or infirm persons without supervision; in such cases additional requirements may be necessary.
This standard does not apply to:
- appliances designed exclusively for industrial purposes;
- appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
- separate motors;
- appliances for high frequency heating except microwave ovens;
- fans (IEC Publication 342: Safety Requirements for Electric Fans and Regulators);
- radio and television receiving appliances (IEC Publication 65: Safety Requirements for Mains Operated Electronic and Related Apparatus for Household and Similar General Use);
- appliances for medical purposes.
Gramophones and similar motor-operated appliances intended to be used in, or in combination with, electronic equipment are tested together with such equipment, in accordance with IEC Publication 65.
For appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary.
For appliances intended to be used in tropical countries, special requirements may be necessary.
Attention is drawn to the fact that in many countries additional requirements are specified by the national health authorities and the national authorities responsible for the protection of labour.
This standard is concerned with safety and takes into account the influence on safety of components necessary to achieve a required degree of radio and television interference suppression. This clause of part 1 is applicable as follows:
This part 2-8 applies to electrically operated water valves for use in, on or in association with equipment for household and similar use, including heating, air-conditioning and similar applications. The equipment may use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
This part 2-8 applies to the inherent safety, to the operating values, operating times and operating sequences where such are associated with equipment safety, and to the testing of automatic electrical control devices used in, on or in association with, household and similar equipment.
This part 2-8 contains requirements for electrical features of water valves and requirements for mechanical features of valves that affect their intended operation.
This part 2-8 is also applicable to electrically operated water valves for appliances within the scope of IEC 60335.
Electrically operated valves for equipment not intended for normal household use but which may nevertheless be used by the public, such as equipment intended to be used by laymen in shops, in light industry and on farms, are within the scope of this part 2-8.
This part 2-8 does not apply to:
- electrically operated water valves of nominal connection size above DN 50;
- electrically operated water valves for admissible nominal pressure rating above 1,6 MPa;
- food dispensers;
- detergent dispensers;
- steam valves;
- electrically operated water valves designed exclusively for industrial applications.
Throughout this part 2-8, where it can be used unambiguously, the term:
- "valve" is used to denote an electrically operated water valve (including actuator and valve body assembly);
- "actuator" means "electrically operated mechanism or prime mover";
- "valve body" means "valve body assembly";
- "equipment" includes "appliance" and "control system".
This part 2-8 also applies to actuators and to valve bodies which are designed to be fitted to each other.
This part 2-8 applies to individual valves, valves utilized as part of a system and valves mechanically integral with multi-functional controls having non-electrical outputs.
NOTE Attention is drawn to the fact that, in many countries, additional test requirements and by-laws have been established by the water authorities or companies.