1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(
2、s); however, it is currently not part of the UL Standard(s) referencedbelow.Product Category (CCN): SHZZ, SHMRStandard Number: UL 60335-2-24Standard Title: Standard for Household and Similar Electrical Appliances - Safety -Part 2-24: Particular Requirements for Refrigerating Appliances, Ice-CreamApp
3、liances and Ice-MakersEdition Date: April 28, 2017Edition Number: 2Section / Paragraph Reference: 22.118DVSubject: Refrigerant Tubing ProtectionDECISION:22.118DV D2 Addition of Clauses 22.118DV.1 and 22.118DV.2 to the Part 2:22.118DV.1 Compression-type appliances which use flammable refrigerants sha
4、ll not be constructed withrefrigerant tubing on the exterior of the refrigerator such that it could be grasped or handled during movingof the appliance.Refrigerant tubing on a refrigerator employing a flammable refrigerant shall be protectedor enclosed to avoid mechanical damage and damage that coul
5、d occur during moving of the product.22.118DV.1.1 Refrigerant tubing located within the confines of the cabinet and tubing that does notprotrude from the compressor compartment is considered to be protected from mechanical damage.22.118DV.1.2 A static condenser coil mounted on the outside of a refri
6、gerator is considered to beprotected against mechanical damage if it complies with all of the following:- The return bends of the condenser are covered such that they cannot be grasped or handledduring moving of the product. The return bends are considered to be adequately covered if theycannot be g
7、rasped with test probe B applied with a force of 20 N.- The other edges of the condenser are covered or secured to prevent damage during movingof the product. They are considered adequately secured if they meet the pull force requirementsof clause 22.11 without deformation of the tubing or loosening
8、 of the condenser from therefrigerator.- All other tubing in the condenser is adequately protected by the fill wire. The tubing isconsidered adequately protected if any single tube cannot be grasped with test probe B appliedwith a force of 20 N.RATIONALE FOR DECISION:The flammable refrigerant requir
9、ements in UL 250 and UL 60335-2-24 1st edition were written such thatrefrigeration tubing should be protected to the greatest extent possible. This includes the protection ofrefrigerant tubing on the exterior of the refrigerator as well as the interior. Clause 22.117DV.3 of Edition1 contained relati
10、vely clear requirements regarding the exterior tubing. Clause 22.118DV.1 of the 2ndedition of UL 60335-2-24 is not very clear as to how this protection is to be achieved, so it has beenre-written for clarity.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMI
11、SSION FROM ULCopyright 2018 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the o
12、pinion of UL LLC. in practically applying therequirements of the standard. They do not represent formal interpretations of the standard underAmerican National Standards Institute (ANSI) processes. UL LLC shall not be responsible to anyone forthe use of or reliance upon Certification Requirement Deci
13、sions by anyone. UL LLC shall not incur anyobligation or liability for damages, including consequential damages, arising out of or in connection withthe use or reliance upon Certification Requirement Decisions. The electronic version of the CertificationRequirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 60335-2-24 -2-
