Detail of GB/T 4706.89-2024

Introduction of GB/T 4706.89-2024

GB/T 4706.89-2024 Safety of household and similar electrical appliances - Part 89:Particular requirements for high pressure cleaners and steam cleaners 1 Scope This clause of GB/T 4706.1-2024 is replaced by the following. This document deals with the safety of high-pressure cleaners without traction drive, intended for household and commercial indoor or outdoor use, having a rated pressure not less than 2.5 MPa and not exceeding 35 MPa. It also applies to steam cleaners and those parts of hot water high pressure cleaners incorporating a steam stage which have a capacity not exceeding 100 l, a rated pressure not exceeding 2.5 MPa and a product of capacity and rated pressure not exceeding 5 MPa·l. They are not equipped with a traction drive. The following power systems of the drive for the high pressure pump are covered: ——mains powered motors up to a rated voltage of 250 V for single-phase machines and 480 V for other machines, ——battery-operated motors, ——internal combustion engines, ——hydraulic or pneumatic motors. This standard does not apply to ——high pressure water jet machines having a rated pressure exceeding 35 MPa; Note 101: In Europe, those machines are covered by EN 1829-1. ——steam cleaners intended for domestic use (IEC 60335-2-54); ——hand-held and transportable motor-operated electric tools (IEC 60745 series, IEC 61029 series, IEC 62841 series); ——appliances for medical purposes (IEC 60601); ——agricultural sprayers (ISO 4254-6); ——non-liquid, solid abrasive cleaners; ——machines designed to be part of a production process; ——machines designed for use in corrosive or explosive environments (dust, vapour or gas); ——machines designed for use in vehicles or on board of ships or aircraft. Note 102: Attention is drawn to the fact that in many countries additional requirements on the safe use of the equipment covered can be specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities. 2 Normative references This clause of GB/T 4706.1-2024 is applicable except as follows. Addition: IEC 60364-1 Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions IEC 61558-2-3 Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners IEC 61770:2008 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets 3 Terms and definitions This clause of GB/T 4706.1-2024 is applicable except as follows. 3.1.9 Replacement: normal operation conditions under which the machine is operated in normal use It deNotes the operation at rated flow and rated pressure with the appropriate nozzle and hose line fitted, all strainers and filters in a clean operating condition and the unloader valve set to the rated pressure. The water heater, if fitted, is operated at maximum power. Electric motor driven machines are supplied at rated voltage. Socket outlets for accessories are loaded with a resistive load in accordance with the marking. The burner is operated at rated power. Machines designed for operation at more than one rated power setting are additionally tested at the most disadvantageous power. On machines designed for use with a flue pipe, a section of flue pipe is attached to the machine. Flue gas determinations are taken in this flue pipe. The draught is adjusted as recommended in the instructions. 3.1.12 Addition: Functions not controlling the starting and stopping of the high pressure jet exiting the nozzle are not regarded as remote operation. Functions for other purposes e.g. detergent or water flow control are not considered to be remote operation. 3.101 unloader valve pressure operated device which, when the pump pressure exceeds a preset value, releases the pressure and leads the excess fluid into the inlet system In addition, it bypasses the total pump flow at reduced pressure when its outlet flow is cut off. 3.102 safety valve pressure operated device which, when the pump or steam cleaner pressure exceeds a preset value, releases the pressure and which may return the excess fluid or steam either to the inlet system or into the atmosphere 3.103 rated pressure maximum working pressure at the pressure generator during normal operatio 3.104 allowable pressure maximum pressure up to which a machine and/or parts of the machine may be subjected without impairing its safety 3.105 rated flow maximum flow at rated pressure at the nozzle during normal operation 3.106 maximum flow rate highest possible flow rate at the nozzle Note: Typically, the maximum flow rate occurs at working pressures lower than rated pressure and with a nozzle designed for spraying of cleaning agents. 3.107 rated temperature maximum temperature of the cleaning agent during normal operation 3.108 pressure switch device which, in response to varying fluid pressure, provides a controlling function at a pre-set value 3.109 flow switch device which, in response to a varying rate of fluid flow, provides a controlling function at a pre-set value 3.110 trigger gun hand-held spraying device where the flow of the cleaning agent is regulated by an integrated manually operated control device 3.111 pencil jet nozzle nozzle that gives a concentrated, parallel water jet Note: Pencil jet nozzles are also known as needle jet nozzles, solid jet nozzles or 0 degree jet nozzles. 3.112 water jetter pipe-cleaning device, connected to and controlled by a trigger gun, consisting of a high pressure hose and a cleaning head with nozzles

Contents of GB/T 4706.89-2024