1、Designation: C 1546 02Standard Guide forInstallation of Gypsum Products in Concealed RadiantCeiling Heating Systems1This standard is issued under the fixed designation C 1546; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide2provides information for trades installinggypsum products in conjunction with a concealed radiantceil
3、ing heating system constructed from thin sheet flexibleradiant heating panels, and for the installation of gypsumproducts after repair of existing concealed radiant ceilingheating systems constructed from heating cable or thin sheetflexible radiant heating panels.1.2 This guide does not purport to a
4、ddress any aspect ofconcealed radiant heating system design or performance, and islimited to the proper installation of gypsum products specifiedfor use in a concealed radiant ceiling heating system.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its
5、use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.1.4 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and foo
6、tnotesshall not be considered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:C 840 Specification for Application and Finishing of Gyp-sum Board3C 841 Specification for Installation of Interior Lathing andFurring3C 842 Specification for Application of Interior GypsumPlaster
7、33. Terminology3.1 Definitions:3.1.1 concealed radiant heating system, na system thatoperates by heating the building materials that conceal the heatsource, which in turn transfer the heat into the heated area byradiant emission.3.1.2 facing, nthe finished surface layer through whichheat is transfer
8、red into a heated area.3.1.3 flexible radiant heating panel, na thin sheet heatingelement intended to produce heat when connected to anelectrical supply.3.1.4 furring, nspacer elements added to a building struc-ture to facilitate fastening of gypsum panel products.3.1.5 gypsum product, nbuilding mat
9、erial intended for usein radiant heated ceiling construction, containing gypsum in itscomposition or construction.3.1.5.1 DiscussionThe gypsum products most often asso-ciated with radiant heating systems are gypsum board andgypsum plaster.3.1.6 heating cable, nan electrically insulated cable in-tend
10、ed to produce heat when connected to an electrical supply.4. Significance and Use4.1 The purpose of this guide is to provide information togypsum product installers for the avoidance of hazards asso-ciated with the installation of gypsum products adjacent to, orsurrounding, electric heating componen
11、ts and conductors; andto avoid damage to gypsum products when used in conjunctionwith a concealed radiant heating system.4.2 The information given in this guide is applicable torepair of existing cable heating systems and to new construc-tion of radiant heating systems constructed from flexibleradia
12、nt heating panels.5. Summary of Guide5.1 Heating System Design:5.1.1 The heating system shall be designed to satisfy theheating needs of the building and to work effectively with allbuilding materials specified for use in the heating systeminstallation.NOTE 1The architect bears the responsibility of
13、 preparing and corre-lating complete plans and specifications, and to engage a professionalfamiliar with the heating system to design the system to meet therequirements of 5.1.1 and 5.1.2.5.1.2 The heating system shall be designed so that a gypsumproduct is not exposed to a temperature more than 125
14、F1This guide is under the jurisdiction of ASTM Committee C11 on Gypsum andRelated Building Materials and Systems and is the direct responsibility ofSubcommittee C11.03 on Specifications for the Application of Gypsum and OtherProducts in Assemblies.Current edition approved October 10, 2002. Published
15、 December 2002.2The first edition of this guide replaced Appendix X.7 of SpecificationC 840 - 99a.3Annual Book of ASTM Standards, Vol 04.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.(52C) for periods of time sufficient to cause
16、 calcination.NOTE 2The foregoing requirement is intended to provide guidance toheating system designers, consistent with Specification C 840, in theabsence of a comprehensive radiant heating system standard.5.2 Installation of Heating Equipment:5.2.1 Installation of radiant heating and related elect
17、ricalequipment is governed by codes and regulations, and is theresponsibility of other trades.5.3 General Installation Guidelines:5.3.1 The application of gypsum panel products under thisguide shall be performed in accordance with SpecificationC 840, except as herein modified.5.3.2 The radiant heati
18、ng system shall be disconnected fromthe electric supply prior to the commencement of work.NOTE 3Disconnection from the electric supply is accomplished byswitching the heating system circuit breakers off, or removing fuses.Lowering a thermostat setting until the heating system turns off is notsupply
19、disconnection.5.3.3 Unless the concealed radiant heating system is nolonger in use and has been permanently disconnected from theelectrical supply, or unless the previous facing has beenremoved, gypsum panel products or gypsum plaster shall notbe installed as a new facing on the heated area side of
20、anexisting concealed radiant heating system.NOTE 4The increased thickness resulting from addition of gypsumpanel products or gypsum plaster to an existing concealed radiant heatingsystem can impair heat transfer into the heated area, and may causeoverheating of the electrical heat source.5.3.4 All i
21、nspection and testing of the heating system shallbe completed before application of gypsum facing materials.5.3.5 Care shall be taken in the installation of fasteners toavoid the penetration of heating equipment and electricalconductors.5.3.6 The radiant heating system shall not be operated toaccele
22、rate the drying of joint compound or texture finishes.5.3.7 Follow the radiant heat-source manufacturers start-upand operating instructions when operating the radiant heatingsystem.5.4 Repair of Cable Heating Systems:5.4.1 Repair of heating cables is the responsibility of othertrades.5.4.2 The appli
23、cation of gypsum plaster shall conform toSpecification C 842 except as herein modified.5.4.3 Filler added to gypsum plaster used to repair a heatingcable system, if any, shall be of sand or similar thermallyconductive material. Thermal insulating fillers such as ver-miculite or perlite, and foaming
24、agents that impair heat transfershall not be used in plaster applied to radiant heating systems.5.4.4 Application of metal lath shall conform to Specifica-tion C 841. Metal lath and fasteners installed for repair of acable heating system shall not contact heating cables.5.4.5 Complete embedding of t
25、he heating cable in plaster isnecessary after cable repair is completed.5.5 Flexible Radiant Heating Panel Systems:5.5.1 Application of gypsum panel products shall complywith the requirements for System I or System II of Specifica-tion C 840, as applicable, based on the specified number oflayers; an
26、d with the requirements of System XII where floatinginterior angles are used.5.5.2 Application of gypsum panel products to steel framingor furring shall comply with System VIII of SpecificationC 840.5.5.3 The thickness of a gypsum panel product installed asa facing shall not exceed the thickness spe
27、cified in the heatingsystem design specification.NOTE 5Installing facing thicker than specified can impair heat trans-fer into the heated area, and may cause overheating of the electrical heatsource.5.5.4 Furring of any material or construction shall not beinstalled between gypsum panel product faci
28、ng and flexibleradiant heating panels.NOTE 6The air gap produced by furring can impair heat transfer intothe heated area, and may cause flexible radiant heating panels to overheat.5.5.5 All joints and heads of fasteners shall be finished inaccordance with Specification C 840, to the specified level
29、offinish.NOTE 7When repairing an existing surface, the level of finish of therepair should be the same as that of the original surface.5.5.6 Foil backed gypsum panel products shall not beinstalled in contact with thin sheet flexible radiant heatingpanels.5.6 Decoration:5.6.1 The heating system shall
30、 be turned off and allowed tocool before decorating.5.6.2 Decoration of finished work, including sizing or seal-ing, shall not proceed until joint compound has dried.5.6.3 When texture finishes are used, such finishes must bethoroughly dry prior to heating system operation.6. Keywords6.1 furring; gy
31、psum panel product; gypsum plaster; heatingcable; heating panel; lath; radiant heatASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the
32、validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your
33、comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments h
34、ave not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C1546022
