C22.2 No. 167-18

Household Dishwashers

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  Standards Update Service

  C22.2 No. 167-18

  November 2018

  
  

  Title: Household Dishwashers

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  NOVEMBER 30, 2018 tr1

  
  

  
  

  Eighth Edition, Dated November 30, 2018

  
  

  Summary of Topics

  
  

  This new edition is being issued to incorporate several substantive changes.

  
  

  The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated March 9, 2018 and August 17, 2018.

  
  

  Canadian Standards Association CSA-C22.2 No. 167-18

  Eighth Edition

  
  

  Underwriters Laboratories Inc. UL 749

  Eleventh Edition

  
  

  Household Dishwashers

  
  

  November 30, 2018

  
  

  ANSI/UL 749-2018

  Commitment for Amendments

  
  

  This standard is issued jointly by the Canadian Standards Association (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to CSA Group or UL at anytime. Revisions to this standard will be made only after processing according to the standards development procedures of CSA Group and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue.

  
  

  
  

  ISBN 978-1-4883-1467-4 © 2018 Canadian Standards Association

  
  

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  NOVEMBER 30, 2018 CSA-C22.2 NO. 167-18  UL 749 3

  CONTENTS

  Preface 8

  1. Scope 10

  2. Reference Publications 10

  3. Definitions 21

  4. General Requirements 24

  5. General Conditions for the Tests 24

     1. Voltage and frequency 24

     2. Cheesecloth for heating and abnormal tests 25

     3. Test temperature 25

     4. Thermocouples 25

     5. Dishwashing detergent 26

     6. Rinse agent 26

     7. Place setting 26

     8. High-sudsing detergent 26

     9. Water temperature 26

  6. Classification 26

  7. Marking 27

     1. General 27

     2. Appliance markings 28

  8. Instructions 31

     1. General 31

     2. Instructions pertaining to a risk of fire, electric shock, or injury to persons 32

     3. Installation instructions 34

     4. Operating instructions 35

     5. User-maintenance instructions 36

  9. Protection Against Accessibility to Current-Carrying Parts 36

     1. General 36

     2. Enclosures for other than built-in appliances 36

     3. Enclosures for built-in appliances 38

     4. All dishwashers 38

  10. Starting of Motor-Operated Appliances 38

  11. Power Input and Current 39

  12. Heating 39

  13. Leakage Current 40

  14. Insulation Resistance 40

  15. Moisture Resistance 41

      1. General 41

      2. Humidity conditioning 42

      3. Liquid overflowing from an auxiliary reservoir 42

      4. Oversudsing 43

      5. Liquid spillage – all appliances 43

      6. Liquid spillage – portable appliances 44

      7. Wetting of electrical components 45

      8. Rain test 46

      9. Hose rupture test 47

      10. Liquid leaking from an auxiliary reservoir 48

      11. Washing test 49

  16. Electric Strength 50

  17. Abnormal Operation 51

      4 CSA-C22.2 NO. 167-18  UL 749 NOVEMBER 30, 2018

      1. Burnout test on components 51

      2. Stopped timer 52

      3. Cord reels 53

      4. Nichrome wire test 53

      5. Resistance to overvoltage 55

      6. Lampholder endurance 56

  18. Stability and Mechanical Hazards 57

      1. General 57

      2. Stability 57

      3. Sharp edges 58

      4. Automatic restarting of the motor 58

      5. Moving parts 58

      6. Guards, interlocks, and the like 59

      7. Unintentional operation 60

  19. Mechanical Strength 60

      1. General 60

      2. Frame and enclosure 61

  20. Construction 63

      1. Current-carrying parts 63

      2. Bottom openings 63

      3. Electrical insulation 65

      4. Sound and thermal insulation 66

      5. Plumbing requirements 66

  21. Internal Wiring 66

      1. General 66

      2. Splices and connections 68

      3. Separation of circuits 69

      4. Barriers 69

      5. Endurance test 70

  22. Components 70

      1. General 70

      2. Mechanical assembly 72

      3. Capacitors 72

      4. Field-attached or optional accessories 73

      5. Heating elements 74

      6. Lampholders 75

      7. Motors 75

      8. Receptacles 76

      9. Seals and diaphragms 76

      10. Switches 77

      11. Controls 79

      12. Connecting hoses 83

      13. Transformers and power supplies 84

      14. Overcurrent protection 84

      15. Electrically operated valves 84

      16. Terminals and connectors 84

      17. Pumps 85

      18. Insulating devices 85

      19. Adhesives used to secure parts 85

      20. Equipment protective devices 86

  23. Supply Connection and External Flexible Cords 86

      1. Permanently connected appliances 86

      2. Cord-connected appliances 87

         NOVEMBER 30, 2018 CSA-C22.2 NO. 167-18  UL 749 5

      3. Push-back relief 89

      4. Strain relief 90

      5. Cord reels 90

      6. Power-supply cord kits for use with undercounter or built-in dishwashers 91

      7. Bushings 91

  24. Terminals for External Conductors 91

  25. Provision for Grounding 92

      1. General 92

      2. Bonding means 94

      3. Continuity of grounding circuit 95

      4. Grounding terminals and leads 95

      5. Heater sheaths 96

  26. Screws and Connections 97

  27. Creepage Distances, Clearances, and Distances through Insulation 97

  28. Alternative Spacings-Clearances and Creepage Distances 98

  29. Resistance to Corrosion 99

      1. General 99

      2. Liquid containers 99

      3. Outdoor use dishwashers (protected locations and outdoor locations) 99

      4. Metallic coating thickness test 101

  30. Resistance to Heat, Fire, and Cracking – Polymeric Materials 102

      1. General 102

      2. Horizontal burning rate 102

      3. Flammability 102

      4. Enclosure flammability – large mass consideration 104

      5. Impact test 105

      6. Cold impact 105

      7. Mould stress relief 105

      8. Immersion 106

      9. Thermal ageing 107

      10. Long-term exposure 107

      11. Endurance 108

      12. Tensile strength 108

      13. Tensile impact energy 108

      14. Seal and gasket tests for outdoor use appliances 109

      15. Ultraviolet light exposure 110

      16. Water exposure and immersion 110

  31. Manufacturing and Production Tests 110

      1. Grounding continuity test 110

      2. Electric strength test 110

TABLES 111

FIGURES 118

SUPPLEMENT SA - PLUMBING REQUIREMENTS FOR HOUSEHOLD DISHWASHERS (NORMATIVE)

SA1 Scope 133

SA2 Glossary 133

SA3 General Requirements 133

SA4 Test Procedures 134

SA4.1 General 134

SA4.2 Initial cycle 134

6 CSA-C22.2 NO. 167-18  UL 749 NOVEMBER 30, 2018

SA4.3 Preparation and test 135

SUPPLEMENT SB - SAFETY OF SMART ENABLED DISHWASHERS

SB1 Scope 137

SB2 General 137

SB2.1 Controls 137

SB2.2 Separation of circuits 138

SB2.3 Communication and display devices 138

SB2.4 Communication conductors and cables 139

SB2.5 Communication connectors 139

SB2.6 Smart enabled or remote operation 139

SB3 Functional Safety 139

SB4 Resistance to Electro Magnetic Phenomena (Immunity) 141

SB5 Markings and Instructions 141

SUPPLEMENT SC - OZONE GENERATING DISHWASHERS

SC1 Scope 143

SC2 General 143

SC2.1 Ozone test 143

SC2.2 Equipment specifications 144

SC2.3 Test conditions 144

SC3 Marking and Instructions 144

SC4 Polymeric Materials Exposed to Ozone 144

SC5 Seals and Diaphragms 145

SC6 Protection Against Injury to Persons 145

SUPPLEMENT SD - ALTERNATIVE ELECTRONIC CIRCUIT REQUIREMENTS

SD1 Scope 147

SD2 General 147

SD3 Glossary 148

SD4 Creepage Distances, Clearances, and Distances Through Insulation 149

SD5 Control Functions 149

SD5.1 Protective electronic circuits/controls 149

SD5.2 Operating controls or circuits that perform safety critical functions 150

SD6 Evaluation of the Different Types of Control Circuits 150

SD6.1 All types of circuits 150

SD7 Protective Electronic Circuits 150

SD8 Operating Controls or Circuits that Perform Safety Critical Functions 151

SD9 General Conditions for the Tests 152

SD9.1 Details 152

SD9.2 Intentionally weak parts 152

SD9.3 Test results determined by overcurrent protection operation 153

SD10 Low-Power Circuits 153

SD10.1 Low-power circuit determination 153

NOVEMBER 30, 2018 CSA-C22.2 NO. 167-18  UL 749 7

SD10.2 Low-power circuit fire tests 155

SD11 Abnormal Operation and Fault Tests 155

SD12 Programmable Component Reduced Supply Voltage Test 157

SD13 Electromagnetic Compatibility (EMC) Requirements – Immunity 157

SD14 Manufacturing and Production Line Testing 158

SD15 Markings 158

Annex A (informative) Translations

A1 French Translations 159

8 CSA-C22.2 NO. 167-18  UL 749 NOVEMBER 30, 2018

Preface

This is the harmonized CSA Group and UL Standard for Household Dishwashers. It is the eighth edition of CSA C22.2 No. 167 and the eleventh edition of UL 749. This edition of CSA C22.2 No. 167 supersedes the previous edition published in 2017. This edition of UL 749 supersedes the previous edition published in 2017.

The major differences between this edition and the previous edition include the revision of thermocouples requirements, the revision of switch requirements, the revision of control requirements, the revision of flammability requirements for functional parts in Table 10, the revisions to smart-enabled dishwasher requirements, the revision of heating elements requirements, the addition of the dishwasher controls washing test, the addition of the resistance to overvoltage test, the addition of the dishwasher lampholder endurance test, the addition of requirements for glass used as an enclosure, and the clarification of interlock requirements.

This harmonized standard was prepared by CSA Group and Underwriters Laboratories Inc. (UL).

The efforts and support of the Harmonization Committee for Household Dishwashers and the Association of Home Appliance Manufactures (AHAM) are gratefully acknowledged.

This standard is considered suitable for use for conformity assessment within the stated scope of the standard.

This Standard was reviewed by the CSA Subcommittee on Household Dishwashers, under the jurisdiction of the Technical Committee on Consumer and Commercial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.

This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.

Application of Standard

Where reference is made to a specific number of samples to be tested, the specified number shall be considered a minimum quantity.

Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose.

Level of harmonization

This standard is published as an identical standard for CSA Group and UL.

An identical standard is a standard that is exactly the same in technical content except for national differences resulting from conflicts in codes and governmental regulations. Presentation is word for word except for editorial changes.

Interpretations

The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been

NOVEMBER 30, 2018 CSA-C22.2 NO. 167-18  UL 749 9

identified, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reflect the intent.

10 CSA-C22.2 NO. 167-18  UL 749 NOVEMBER 30, 2018

Household dishwashers

1. Scope

   
   

   1. This standard applies to electric household dishwashers intended to be used in nonhazardous locations in accordance with the Canadian Electrical Code (CEC), Part I, C22.1, General Requirements – Canadian Electrical Code (CEC), Part II, C22.2, and the National Electrical Code (NEC), NFPA 70, on circuits having a nominal voltage not exceeding 250 V.

      
      

   2. This standard applies to both cord-connected appliances and permanently-connected appliances.

      
      

   3. This Standard applies to smart-enabled household dishwashers that are intended to receive and respond to communication signals or data relating to power billing rate or demand response, or communication signals from a remote user interface such as a smart phone or computer. See Supplement SB.

      
      

   4. This standard applies to household dishwashers generating ozone during normal operation. See Supplement SC.

      
      

   5. This standard does not apply to commercial appliances. Commercial appliances are covered under the scope of the Standard for Commercial Dishwashing Machines, CSA C22.2 No. 168, or the Standard for Commercial Dishwashers, UL 921.

      
      

2. Reference Publications

   
   

   1. Where reference is made to any Standards, such reference shall be considered to refer to the latest editions and revisions thereto available at the time of printing, unless otherwise specified.

CSA Group Standards

B64 Series-11

Backflow preventers and vacuum breakers

B64.1.1-11

Atmospheric Vacuum Breakers (AVB)

C22.1-18

Canadian Electrical Code, Part I

C22.2 No. 0-10 (R2015)

General Requirements – Canadian Electrical Code (CEC), Part II

C22.2 No. 0.1-M1985 (R2013 )

General Requirements for Double-Insulated Equipment

C22.2 No. 0.2-93 (R2008)

Insulation Coordination

C22.2 No. 0.3-09 (R2014)

Test Methods For Electrical Wires and Cables