Safety of household and similar electrical appliances - Part 50: Particular requirements for commercial electric dishwashers
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This document deals with the safety of electrically operated dishwashing machines for washing plates, dishes, glassware, cutlery and similar articles, with or without means for water heating or drying, not intended for household use, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances.
Note 101: These appliances are used for example in restaurants, canteens, hospitals, and commercial enterprises such as bakeries, butcheries, etc.
Note 102: Examples of such appliances are
——conveyor dishwashers;
——batch dishwashers;
——brush machines.
Requirements to avoid backsiphonage of non-potable water into the water mains are specified in Annex BB.
The electrical part of appliances making use of other forms of energy is also within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by these
types of appliances.
Note 103: 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, the national water supply authorities and similar authorities;
——in many countries, additional requirements are specified for pressure appliances.
Note 104: This standard does not apply to:
——appliances designed exclusively for industrial purposes, for example machines used in the food industry for cleaning receptacles that serve as packaging for final products (e.g. bottle-cleaning machines), and machines used in manufacturing processes;
——sterilizers and washer-disinfectors used to treat medical materials (IEC 61010-2-040);
——dishwashers that do not form one functional unit, for example where a transportation device transfers the load from one separate unit to another;
——separately driven transport devices not confined in the appliance;
——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).
2 Normative references
This clause of GB/T 4706.1-2024 is applicable except as follows.
Addition:
IEC 60436:2015 Electric dishwashers for household use - Methods for measuring the performance
IEC 61770:2008 Electric appliances connected to the water mains - Avoidance of back-siphonage and failure of hose-sets
3 Terms and definitions
This clause of GB/T 4706.1-2024 is applicable except as follows.
3.1.4 Addition:
Note: The rated power input is the sum of the power inputs of all the individual elements in the appliance that can be on at one time; where there are several such combinations possible, that giving the highest power input is used in determining the rated power input.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
Appliances intended to be connected to a water supply are connected to a water supply having the pressure and temperature specified in the instructions.
If a range of temperatures and pressures is specified in the instructions then the water supply is at the conditions within the range that will give the most unfavourable temperature results.
Water inlets intended for cold water only are connected to a source supplying water at a temperature of 1 5 °C ± 5 °C.
The appliance is filled with the maximum quantity of water for which it is designed, without detergents or rinsing agents. Brush machines are tested with dishes and the dishwasher is loaded with the maximum number of dishes specified in the instructions for use. The dimensions of the dishes are as specified in IEC 60436. Other appliances are tested without dishes.
Batch dishwashers are operated on continuous cycles, each cycle being followed by a rest period of 1 min. Lids or covers, if any, are left open during the rest period.
Conveyor dishwashers and brush machines are operated continuously.
The appliance is operated as follows:
——appliances with automatic timers or programmers are operated with the programme that will give the most unfavourable temperature results;
——appliances that have neither an automatic timer nor a programmer are operated in accordance with the instructions for use, but with the controls intended to be set by the user set at maximum or that setting giving the most unfavourable temperature results.
3.5.101
batch dishwasher
appliance in which the various processes are carried out sequentially on a single load
3.5.102
brush machine
appliance in which plates are cleaned by being placed between or held in contact with
brushes or similar devices
3.5.103
conveyor (rack or flight) dishwasher
appliance in which the various processes, e.g. washing, rinsing etc., are carried out, the load being moved through the various operations automatically
3.8.101
indicated level
mark on the appliance to indicate the maximum liquid level for correct operation
4 General requirement
This clause of GB/T 4706.1-2024 is applicable.
