GB/T 4706.11-2024 Safety of household and similar electrical appliances - Part 11: Particular requirements for instantaneous water heaters
1 Scope
This clause of Part 1 is replaced by the following.
This document deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature.
This document applies to electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
Note 101: Instantaneous water heaters incorporating bare heating elements are within the scope of this standard.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended for use in shops, in light industry and on farms, are within the scope of this standard.
As far as is practicable, this document deals with the common hazards presented by appliances which 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.
Nott 102: Attention is drawn to the fact that
——for appliances 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 relevant national regulatory authorities;
——in many countries regulations exist for the installation of equipment connected to the water mains.
Note 103: This standard does not apply to
——appliances for heating liquids (GB/T 4706.19);
——storage water heaters (GB/T 4706.12);
——appliances intended 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);
——commercial dispensing appliances and vending machines (GB/T 4706.72).
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance while supplied with water, the flow being adjusted to attain the highest outlet water temperature without operation of the thermal cut-out
3.101
instantaneous water heater
stationary appliance for heating water while it flows through the appliance
Note: Instantaneous water heaters are referred to as water heaters.
3.102
closed water heater
instantaneous water heater intended to operate at the pressure of the water system, the flow of water being controlled by one or more valves in the outlet system
Note: The operating pressure can be the output pressure of a reducing or boosting device.
3.103
open-outlet water heater
instantaneous water heater in which the flow of water is controlled by a valve in the inlet pipe, there being no valve in the outlet pipe
3.104
bare-element water heater
instantaneous water heater in which uninsulated heating elements are immersed in the water
3.105
rated pressure
water pressure assigned to the appliance by the manufacturer
3.106
flow switch
device that operates in response to a flow of water
3.107
pressure switch
device that operates in response to a change in pressure
4 General requirement
This clause of Part 1 is applicable.
Safety of household and similar electrical appliances - Part 11: Particular requirements for instantaneous water heaters
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This document specifies the safety requirements for instantaneous water heaters intended for household and similar use and intended to heat water to a temperature below boiling point.
This document deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
Note 101: Instantaneous water heaters incorporating bare heating elements are within the scope of this document.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended for use in shops, in light industry and on farms, are within the scope of this document.
As far as is practicable, this document deals with the common hazards presented by appliances which 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 102: Attention is drawn to the fact that
——for appliances 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;
——in many countries regulations exist for the installation of equipment connected to the water mains.
Note 103: This document does not apply to
——appliances for heating liquids (GB/T 4706.19);
——storage water heaters (GB/T 4706.12);
——appliances intended 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);
——commercial dispensing appliances and vending machines (GB/T 4706.72).
2 Normative references
This clause of GB/T 4706.1-2024 is applicable.
3 Terms and definitions
This clause of GB/T 4706.1-2024 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance while supplied with water, the flow being adjusted to attain the
highest outlet water temperature without operation of the thermal cut-out
3.101
instantaneous water heater
stationary appliance for heating water while it flows through the appliance
Note: Instantaneous water heaters are referred to as water heaters.
3.102
closed water heater
instantaneous water heater intended to operate at the pressure of the water system, the flow of water being controlled by one or more valves in the outlet system
Note: The operating pressure can be the output pressure of a reducing or boosting device.
3.103
open-outlet water heater
instantaneous water heater in which the flow of water is controlled by a valve in the inlet pipe, there being no valve in the outlet pipe
3.104
bare-element water heater
instantaneous water heater in which uninsulated heating elements are immersed in the water
3.105
rated pressure
water pressure assigned to the appliance by the manufacturer
3.106
flow switch
device that operates in response to a flow of water
3.107
pressure switch
device that operates in response to a change in pressure
4 General requirement
This clause of GB/T 4706.1-2024 is applicable.
