Effective July 29, 2016
Effective Date (See Schedule below): July 29, 2016
Impact Statement: A review of all Listing Reports is necessary to determine which products comply with new/revised requirements and which products will require re-evaluation. NOTE: Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.
Overview of Changes: The revisions include the addition of supplement for requirements for alternative path for electronic controls, as well as revisions to requirements regarding flammable refrigerants. Specific details of new/revised requirements are found in table below.
Schedule: So that shipping of products with Listing Marks will not be interrupted, an approximate schedule has been established to ensure Listing Reports are found compliant by Effective Date:
Fees: An initial review of Listing Report (s) will be covered by a direct billing project and will be invoiced at not more than $1000 per report.
Client Action Required:
Information – To assist our Engineer with review of your Listing Reports, please submit technical information in response to the new/revised paragraphs noted in the attached or explain why these new/revised requirements do not apply to your product (s).
Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.
|-||-||UL 484 has been revised primarily to limit the amount of flammable refrigerant that can be used. These changes are reflected in clause 36.2, Supplement SA, and Appendices A, C, D and E.|
|36.2||New clause added;|
Refrigerants are categorized for toxicity as either lower toxicity or higher toxicity in accordance with the Standard for Number Designation of Refrigerants, NSI/ASHRAE 34. Refrigerants intended for use in room air conditioners shall be in the lower toxicity group, Group A.
REQUIREMENTS FOR ROOM AIR CONDITIONERS EMPLOYING A FLAMMABLE REFRIGERANT IN THE REFRIGERATING SYSTEM
The changes eliminate all the room area and installation height criteria since the below equation (referenced in Appendix E) would require a charge size based only on the refrigerant LFL.
Revision to reduce the refrigerant charge;
|SUPPLEMENT SC||Info||Addition of supplement for requirements for alternative path for electronic controls|
CUSTOMERS PLEASE NOTE: This Table and column "Verdict" can be used in determining how your current or future production is or will be in compliance with new/revised requirements.