1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): GAQF, GARCStandard Number: UL 2166Standard Title: Standard for Halocarbon Clean Agent Extinguishing System UnitsEdition Date: August 29, 2012Edition Number:
3、2Section / Paragraph Reference: 9.5.1, 9.5.1.1, 61.2kSubject: Removal of electric actuatorsDECISION:9.5.1 Removal of an electric actuator from either the agent storage container discharge valve it controlsor the selector valve it controls shall result in a visual and audible supervisory signal at th
4、e releasingcontrol panel.9.5.1.1 Duplicate terminals or leads, or an equivalent arrangement, shall be provided for circuits ofproducts intended to be connected to initiating-device circuits of a releasing control unit; one for eachincoming and one for each outgoing wire. It is not prohibited that a
5、common terminal be used in lieu ofduplicate terminals when it is intended to prevent the looping of an unbroken wire around or under aterminal screw in a manner that permits the looped wire to remain unbroken during installation, therebyprecluding supervision in the event the wire becomes dislodged
6、from under the terminal. A notchedclamping plate under a single securing screw, where separate conductors are intended to be inserted ineach notch, is an equivalent arrangement.61.2k) Only those devices suitable for supervision shall be designated in the installation manual.When duplicate terminals
7、or leads are not used and there is no provision to prevent looping anunbroken wire around or under one terminal, the information in UL 864, Section 90.11 shall beincluded in the installation wiring diagram or instructions included in the installation manual.RATIONALE FOR DECISION:The decision suppor
8、ts consistency with the intended end use standard, NFPA 2001-2012. Specificallysections 4.3.4.1 and 4.3.4.2 that have been reproduced below for convenience.4.3.4.1* Removal of an electric actuator from the agent storage container discharge valve that itcontrols shall result in an audible and visual
9、indication of system impairment at the systemreleasing control panel.4.3.4.2 Removal of an electric actuator from the selector valve it controls shall result in anaudible and visual indication of system impairment at the system releasing control panel.Copyright 2014 Underwriters Laboratories Inc.UL,
10、 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 opinion of Underwriters Laboratories Inc.
11、inUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be
12、responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement 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 2166 -2-
