1、UL 484ISBN 1-55989-302-8Room Air ConditionersFebruary 24, 1999 UL 484 tr1Underwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for SafetyforRoom Air Conditioners, UL 484Seventh Edition, Dated April 27, 1993Revisions: This Standard contains revisions through and in
2、cluding February 24, 1999.The revisions dated February 24, 1999 include a reprinted title page (page 1) for this Standard.The revisions dated February 24, 1999 were issued to correct editorial errors.As indicated on the title page (page 1), this UL Standard for Safety is an American National Standar
3、d. Attention isdirected to the note on the title page of this Standard outlining the procedures to be followed to retain the approved textof this ANSI/UL Standard.As indicated on the title page (page 1), this UL Standard for Safety has been adopted by the Department of Defense.The master for this St
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18、on-line screen view or the printed Standard.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures, and/or otherelements of the Standard having future effective dates as indicated in the note following the affected item. The priortext for requirem
19、ents that have been revised and that have a future effective date are located after the Standard, andare preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of the requirements inthis Standard including those re
20、quirements 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 compliance with all the requirements in this Standard will be required as a con
21、dition of continued Listing,and Follow-Up Services after the effective date, and understanding of this should be signified in writing.Copyright 1999 Underwriters Laboratories Inc.February 24, 1999 UL 484 tr3This Standard consists of pages dated as shown in the following checklist:Page Datetr1 tr4 .
22、February 24, 19991 . April 27, 1993 (Reprinted: February 24, 1999)2 . October 28, 19983 . April 27, 19934 . October 28, 19985 . February 5, 19986 . October 28, 19987 19 . April 27, 199320 . August 6, 199621 . April 27, 199322 24, 24A, 24B, 25 . October 28, 199826 29 . April 27, 199330 . November 12,
23、 199331 40 . April 27, 199341 . October 28, 199842 . April 27, 199343, 44, 44A, 44B . October 28, 199845 50 . April 27, 199351, 52, 52A, 52B . May 2, 199653 . February 5, 199854 . April 27, 199355 58 . June 24, 199759, 60 . April 27, 199361, 62, 62A, 62B . October 28, 199863 . April 27, 199364 66, 6
24、6A, 66B . October 28, 199867 72 . April 27, 199373 . May 2, 199674, 74A, 74B . June 24, 199775 83 . April 27, 199384 . August 6, 199685 . April 27, 199386 . August 6, 199687 . June 24, 199788 . April 27, 199389 . June 24, 199790 . October 28, 199891 . April 27, 199392, 92A, 92B, 93 96 . October 28,
25、199897, 98 . April 27, 199399, 100, 100A, 100B, 101 . May 2, 1996102 110 . April 27, 1993A1, A2 . October 28, 1998CRG1 . February 5, 1998CRG2, CRG3 . February 24, 1999CRG4 . February 5, 1998tr4 February 24, 1999 UL 484No Text on This PageAPRIL 27, 1993 ANSI/UL 484-1995 (Title Page Reprinted: Februar
26、y 24, 1999)1UL 484Standard forRoom Air ConditionersFirst Edition August, 1954Second Edition September, 1957Third Edition December, 1961Fourth Edition January, 1972Fifth Edition March, 1973Sixth Edition March, 1982Seventh EditionApril 27, 1993Approval as an American National Standard (ANSI) covers th
27、e numbered paragraphson pages dated April 27, 1993 and November 12, 1993. These pages should not bediscarded when revised or additional pages are issued if it is desired to retain theANSI approved text.An effective date included as a note immediately following certain requirements is oneestablished
28、by Underwriters Laboratories Inc.Approved as ANSI/UL C33.14 1972, October 27, 1972Approved as ANSI/UL 484 1986, February 12, 1986Approved as ANSI/UL 484 1995, April 17, 1995The Department of Defense (DoD) has adopted UL 484 on February 5, 1993. Thepublication of revised pages or a new edition of thi
29、s standard will not invalidate theDoD adoption.Revisions 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 thataccom
30、panies the latest set of revised requirements.ISBN 1-55989-302-8COPYRIGHT 1973, 1999 UNDERWRITERS LABORATORIES INC.2 ROOM AIR CONDITIONERS UL 484 OCTOBER 28, 1998No Text on This PageAPRIL 27, 1993 ROOM AIR CONDITIONERS UL 484 3CONTENTSFOREWORDINTRODUCTION1 Scope . 72 General . 73 Glossary . 84 Insta
31、llation and Operating Instructions . 9CONSTRUCTION5 General . 106 Assembly . 107 Accessories . 158 Enclosures . 169 Polymeric Materials . 2110 Mounting Hardware . 2511 Field Supply Connections . 2512 Internal Wiring . 3013 Separation of Circuits . 3414 Bonding for Grounding . 35ELECTRICAL COMPONENTS
32、15 Capacitors . 3816 Current-Carrying Parts . 3917 Electric Air Heaters . 3918 Fuseholders and Circuit Breakers . 4019 Insulating Material . 4120 Motors and Motor Overload Protection . 4121 Switches and Controllers . 4522 Transformer Protection . 4723 High-Voltage Control Circuit Conductor Overcurrent Protection . 49ELECTRICAL SPACINGS24 High-Voltage Circuits . 5125 Low-Voltage Circuits . 53REFRIGERATION SYSTEM26 Refrigerant . 5327 Pump-Down Capacity .
