1、UL 399ISBN 1-55989-432-6Drinking Water CoolersDecember 1, 1998 UL 399 tr1Underwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for SafetyforDrinking-Water Coolers, UL 399Sixth Edition, Dated June 25, 1993Revisions: This Standard contains revisions through and incl
2、uding December 1, 1998.A change is indicated by a note following the affected item. The note is preceded and followed by an asterisk.The revisions dated December 1, 1998 include a reprinted title page (page 1) for this Standard.The revisions dated December 1, 1998 were issued to correct flammable ma
3、terial designations, replace obsoletestandards references, add a flexible cord type for outdoor use and correct editorial errors. The references to theStandard for Thermal Protectors for Motors, UL 547 and Impedance Protected Motors, UL 519, were changed toOverheating Protection for Motors, UL 2111.
4、 The flexible cord type W for outdoor use was added based on a 1996NEC Code revision. As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard. Attention isdirected to the note on the title page of this Standard outlining the procedures to be followed to
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8、t prior permission of UL.Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is current only if itincorporates the most recently adopted revisions.UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limi
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10、use this Standard, evenif UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULsliability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim.tr2 December 1, 1998 UL 399UL will attempt to answer sup
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20、ed in the note following the affected item. The priortext for requirements that have been revised and that have a future effective date are located after the Standard, andare preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be j
21、udged under all of the requirements inthis Standard including those requirements with a specified future effective date, unless the applicant specificallyrequests that the product be judged under the current requirements. However, if the applicant elects this option, it shouldbe noted that complianc
22、e with all the requirements in this Standard will be required as a condition of continued Listing,Recognition, and Follow-Up Services after the effective date, and understanding of this should be signified in writing.Copyright 1998 Underwriters Laboratories Inc.December 1, 1998 UL 399 tr3This Standa
23、rd consists of pages dated as shown in the following checklist:Page Datetr1 tr4 . December 1, 19981 . June 25, 1993 (Reprinted: December 1, 1998)2, 2A . December 1, 19982B . June 11, 19973 . March 3, 19944, 5 . December 1, 19986 9 . June 25, 199310 12, 12A, 12B, 13 . December 1, 199814, 14A, 14B . S
24、eptember 24, 199615 19 . June 25, 199320, 20A, 20B . September 24, 199621 . December 1, 199822, 22A, 22B . September 24, 199623, 24 . June 25, 199325 . September 24, 199626 . December 1, 199826A, 26B . September 24, 199627 30 . June 25, 199331 . September 24, 199632, 32A, 32B . December 1, 199833 .
25、June 25, 199334 . December 1, 199835 . June 25, 199336, 36A, 36B . December 1, 199837 . September 24, 199638 . June 25, 199339, 40, 40A, 40B . May 14, 199641 . October 30, 199742 . June 25, 199343 46 . June 11, 199747 48 . June 25, 199349, 50, 50A, 50B . December 1, 199851 54 . June 25, 199355 . Sep
26、tember 24, 199656, 56A, 56B, 57 . May 14, 199658, 58A, 58B . September 24, 199659, 60, 60A, 60B . December 1, 199861 68 . June 25, 199369 . June 11, 199770 . June 25, 199371 . May 14, 199672 . June 25, 199373 . May 14, 199674 76 . June 25, 199377, 78, 78A, 78B, 79, 80, 80A, 80B . September 24, 19968
27、1 84 . June 25, 1993SA1 SA4 . March 3, 1994A1, A2 . December 1, 1998tr4 December 1, 1998 UL 399No Text on This PageJUNE 25, 1993 ANSI/UL 399-1992 (Title Page Reprinted: December 1, 1998)1UL 399Standard forDrinking-Water CoolersFirst Edition December, 1956Second Edition November, 1968Third Edition Se
28、ptember, 1972Fourth Edition July, 1978Fifth Edition July, 1987Sixth EditionJune 25, 1993Approval as an American National Standard (ANSI) covers the numbered paragraphson pages dated June 25, 1993. These pages should not be discarded when revisedor additional pages are issued if it is desired to reta
29、in the ANSI approved text.An effective date included as a note immediately following certain requirements is oneestablished by Underwriters Laboratories Inc.Approved as ANSI C33.82-1972, July 19, 1972Approved as ANSI/UL 399-1979, April 26, 1979Approved as ANSI/UL 399-1986, September 19, 1986Approved
30、 as ANSI/UL 399-1992, March 31, 1992Revisions of this standard will be made by issuing revised or additional pages bearingtheir date of issue. A UL Standard is current only if it incorporates the most recentlyadopted revisions, all of which are itemized on the transmittal notice thataccompanies the
31、latest set of revised requirements.ISBN 1-55989-432-6COPYRIGHT 1978, 1998 UNDERWRITERS LABORATORIES INC.2 DRINKING-WATER COOLERS UL 399 DECEMBER 1, 1998CONTENTSFOREWORDINTRODUCTION1 Scope . 52 General . 53 Glossary . 64 Installation And Operating Instructions . 7CONSTRUCTION5 General . 76 Assembly .
32、 77 Enclosures . 138 Field Supply Connections . 189 Internal Wiring And Wiring Methods . 22A10 Separation of Circuits . 26A11 Bonding for Grounding . 27ELECTRICAL COMPONENTS12 Current-Carrying Parts . 3013 Insulating Material . 3014 Switches And Controllers . 3115 Motors and Motor Overload Protection . 3316 Electric Water Heaters . 36A17 Valves and Solenoids . 3718 Capacitors . 3819 Transformers . 38SPACINGS20 High-Voltage Circuits . 3921 Low-Voltage Circuits . 40AREFRIGERATION SYSTEM22 Refrigerant . 4123 Pump-Down Capacity . 4124 Refrigerant Tubing and Fittings .
