ASTM F2647-2007 Standard Guide for Approved Methods of Installing a CVS (Central Vacuum System)《中央真空系统(CVS)经批准的安装方法用标准指南》.pdf

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1、Designation: F 2647 07Standard Guide forApproved Methods of Installing a CVS (Central VacuumSystem)1This standard is issued under the fixed designation F 2647; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi

2、on. 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 guide demonstrates proper methods for installing acentral-vacuum system.1.2 Appendix X1 contains additional sources of info

3、rmationthat may be helpful to the user of this guide.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is th

4、eresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E 814 Test Method for Fire Tests of Through-PenetrationFire StopsE 2174 Practice for O

5、n-Site Inspection of Installed FireStopsF 402 Practice for Safe Handling of Solvent Cements,Primers, and Cleaners Used for Joining Thermoplastic Pipeand FittingsF 412 Terminology Relating to Plastic Piping SystemsF 2158 Specification for Residential Central-Vacuum Tubeand Fittings3. Terminology3.1 D

6、efinitions:3.2 For definitions of terms used in this guide, see Termi-nology F 412.4. Significance and Use4.1 The suggestions of this guide are intended to provideproper installation materials and practices to be used during theinstallation of a central-vacuum system.5. Materials5.1 Plastic Material

7、sFor information on plastic materialsused for installing a CVS system, see Specification F 2158.1This guide is under the jurisdiction of ASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.30 on Durability-Reliability.Current edition approved Oct. 1, 2007. Publi

8、shed November 2007.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Ha

9、rbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.APPENDIXES(Nonmandatory Information)X1. STORAGEX1.1 Outside StoragePlastic tube should be stored on aflat surface or supported in a manner that will prevent saggingor bending. Do not store tube in direct sunlight for longperiod

10、s. To prevent damage, tubing and fittings should not bestored where the temperature exceeds 130F (54C).X1.2 Inventories of plastic tube should be used on a first-in, first-out basis.X2. JOINTS AND CONNECTIONSX2.1 PVC tubing and fittings shall be joined by thesolvent-cement method.X2.2 Metal tubing a

11、nd fittings shall be joined according toAppendix X4.X3. SOLVENT CEMENT JOINTSX3.1 Tube CuttingCut the tube square with the axis,using a fine-tooth handsaw and a miter box.Arotary cutter maybe used if the cutting blades are specifically designed forcutting plastic tube in such a way as not to raise a

12、 burr or ridge(flare) at the cut end (see Fig. X3.1). Remove all burrs with adeburring tool, knife, file, or abrasive paper.X3.2 Dry Fit TestThe solvent cement joint is designed sothat there will generally be interference of the tube wall withthe fitting socket before the tube is fully inserted. Ins

13、ert thetube into the fitting and check that the interference occurs about13 to23 of the socket depth (Fig. X3.2).X3.3 CleaningSurfaces to be joined must be cleaned andbe free of dirt, moisture, oil, and other foreign material. If thiscannot be accomplished by wiping with a clean, dry cloth, achemica

14、l or mechanical cleaner must be used. If a chemicalcleaner is used, apply with an applicator. (WarningSkincontact with chemical cleaners should be avoided.)X3.4 Application Procedure:X3.4.1 Handling CementKeep the cement can closed andin a shady place when not actually in use. Discard the cementwhen

15、 an appreciable change in viscosity takes place or at thefirst sign of gelation. The cement should not be thinned. Keepthe applicator immersed in cement between applications. (SeePractice F 402 for proper handling procedures.)X3.4.2 Application of CementPVC solvent cement is fastdrying, and, therefo

16、re, the cement shall be applied as quickly aspossible, consistent with good workmanship (see Fig. X3.3).The surface temperature of the mating surfaces should notexceed 110F (43C) at the time of assembly.FIG. X3.1 Apparatus for Cutting TubeFIG. X3.2 Tube Entering Dry FittingF2647072X3.4.3 Apply cemen

17、t lightly but uniformly to the outside ofthe tubing, taking care to keep the use of cement to a minimum.(WarningApplication of cement to fitting socket is notrecommended and can cause drippings or an excess amount ofcement to be pushed to the inside diameter of the connectionthat can possibly snag d

18、ebris and eventually create a clog.)X3.4.4 Low-Temperature ApplicationsAt temperaturesbelow freezing, 32F (0C), solvents penetrate and soften thePVC surfaces more slowly than in warmer weather. For thisreason, it is recommended that testing be done on a piece ofscrap tube to determine if satisfactor

19、y penetration of thesurfaces can be achieved.X3.4.5 Assembly of JointImmediately after applying acoat of cement to the tube, forcibly insert the tube into thesocket. To distribute the cement evenly, turn the tube or fittinga14 turn during the process (see Fig. X3.4).X3.4.6 Assembly should be complet

20、ed within 20 s after theapplication of cement. (WarningUntil the cement is set inthe joint, the tube may back out of the fitting socket, if not heldin place for approximately 1 min after assembly. Care shouldbe taken during assembly not to disturb or apply any force tothe joints previously made, as

21、early rough handling can destroyfresh joints.)X4. METHODS OF JOINING METAL TUBING AND FITTINGSX4.1 Tube CuttingCut the tube square with the axis,using a metal cutting blade in a chop saw or band saw. A rotarycutter may be used if the cutting blades are specificallydesigned for cutting metal tube in

22、such a way as not to raise aburr or ridge (flare) at the cut end. Remove all burrs with adeburring tool, file or abrasive paper.X4.2 CleaningSurfaces to be joined must be cleaned andfree of dirt, moisture, oil and other foreign material. If thiscannot be accomplished by wiping with a clean, dry clot

23、h, achemical or mechanical cleaner must be used. If a chemicalcleaner is used, apply with an applicator. (WarningSkincontact with chemical cleaners should be avoided.)X4.3 Assembly of JointThere are three popular andrecommended methods of joining metal tubing and fittings foruse in low vacuum and pr

24、essure systems under 16 PSIG(Adhesive, Compression Couplings and Shrink Sleeves).All ofthese methods provide secure connections eliminating the needfor welding or brazing.X4.3.1 AdhesiveThe best proven adhesive to bond metaltubing and fittings together is industrial contact cement. Forbest results,

25、apply coatings of equal thickness on each cleansurface to be joined. Do not join immediately. When bothsurfaces are tacky to touch, insert the tubing the full depth intothe fitting socket. Make sure excess adhesive has not beenpushed to the inside diameter of the tubing (if any has be sureto remove

26、it to prevent any future obstruction areas).X4.3.2 Compression CouplingsA mechanically fastenedcoupling that connects straight end tubing or fittings within theID of the coupling. These couplings offer an easy “tear down”or “repair” function (see Fig. X4.1 and Fig. X4.2).X4.3.3 Shrink SleeveA heat s

27、hrinkable polyolefin bandliterally shrinks and encircles the connection giving it mechani-cal strength and a positive seal. This joining method can beused in conjunction with slip couplings, expanded tubing orfittings. Depending on weather conditions, shrink sleevestypically can be installed in as l

28、ittle as 1-2 min each (see Fig.X4.3).X4.3.3.1 Equipment Needed to Apply Shrink Sleeve:(1) A propane or butane torch, having a broad 12 in. or 15in. soft billowy orange flame.(2) Or a commercial heat gun with 500F (14 amp)capability.X4.3.3.2 Applying Shrink Sleeve:(1) Slip shrink sleeve over the clea

29、n tube before joiningfittings together, join fittings and center shrink sleeve over jointarea.FIG. X3.3 Uniform Application of Cement to Outside of TubeFIG. X3.4 Assembly of JointFIG. X4.1 Compression CouplingF2647073(2) Apply heat, starting in center over joint and worktowards the endsapplying heat

30、 as uniformly as possiblearound the circumference of the sleeve.(3) Operation is complete when the sleeve is in 360contact with the tube and a small amount of molten adhesive isvisible at both ends of the sleeve.(4) The joined connection may be moved when the sleeveand joint area are cool enough to

31、hold with bare hands.(5) For repair, simply cut the sleeve with a knife or razorblade and remove.X4.4 Tubing SupportAll horizontal runs of the systemmust be securely supported and fastened with tube hangers.Hangers should be spaced on 10 ft centers. All vertical tubingmust be firmly held in place.X5

32、. SYSTEM INSTALLATIONX5.1 To determine the location of hose inlet-valves, iden-tify locations that will provide the maximum area of cleaningcoverage, usually on inside walls in hallways, near doorways,archways, and at the bottom of stairways. (WarningInstallation of a tubing system will vary dependi

33、ng on thearchitecture of the building; however, some features are com-mon and are addressed. Other features are referenced in theManufacturers installation instructions.) Support for the tub-ing to be not less than every 4 ft (122 cm).X5.1.1 After locating the hose inlet-valve (unless the hose issho

34、rter), use a 30-ft (9.1-m) length of cord or string to ensurethat the maximum area of cleaning coverage is accessible.Drawings or plans may be used as well as the actual building.Floor plans are normally14 in. (1.50 cm) scale. A 7-in.(180-mm) piece of string or beaded chain will help determinethe op

35、timum location. Keep in mind that furniture, doors, andother obstacles will prevent hoses from reaching the maximum30 ft (9.1 m), so hose inlet-valve placement and quantity isimportant to ensure that all areas to be cleaned can be reachedby the hose.X5.1.2 Check the tubing path to avoid possible obs

36、tructions,such as heating ducts. Installation is best accomplished byrunning a trunk line leading from the farthest hose inlet- valveto the power unit with branch lines running to the individualhose inlet-valves. Lines may be installed in partitions, attics,and crawl spaces, under or between floor j

37、oists, or on faces ofwalls or columns. It is always best to keep trunk lines andbranch lines as straight as possible without unnecessary bendsand turns.X5.2 Recommended Tools:X5.2.112-in. (1.3-cm) right angle drill or12-in. (1.3-cm)drill,X5.2.2 214 to 2916-in. (5.7 to 6.5-cm) hole saw or cutter,X5.2

38、.314 in. (6.4 mm) masonry drill bit,X5.2.4 Common hacksaw or small handsaw with 18 teeth/in. blade or 2 in. PVC tube cutter,X5.2.5 Miter box,X5.2.6 Steel measuring tape,X5.2.7 Screw driver (Philips),X5.2.8 Screw driver (slot),X5.2.9 Wire connectors for #20 AWG (min) wire,X5.2.10 Side cutters,X5.2.11

39、 Hammer,X5.2.12 Wire coat hanger,X5.2.13 Pocket or utility knife,X5.2.14 Flashlight,X5.2.15 Drywall saw or jig saw,X5.2.16 Deburring and chamfering tool for PVC tubing,X5.2.17 Electrical tape,X5.2.18 Propane or butane torch,X5.2.19 Safety gloves, andX5.2.20 Wire snippers.X5.3 Installation of Hose In

40、let Valves for an Existing Home(Finished Walls):X5.3.1 The hole in the wall for the hose inlet-valve shouldbe located between studs, clear of obstructions such as plumb-ing, wiring, and heat ducts.NOTE X5.1The minimum stud depth for sufficient clearance of anadapter elbow is 234 in. (70 mm).X5.3.2 D

41、etermine the exact location of the hose inlet-valveand select a point on the floor directly below vertical center ofthe desired location. Drill a small hole (against the wall)through the flooring and subflooring. The straight section of acoat hanger cut at an angle makes a good pilot hole drill bit.

42、From beneath the floor, this pilot hole will serve as a guidepoint from which you can measure over approximately 212 in.FIG. X4.2 Improved Compression CouplingFIG. X4.3 Shrink SleeveF2647074(63 mm) to locate and drill a minimum 214-in. (57-mm) up toa maximum 2916-in. (65-mm) diameter hole in the cen

43、ter ofthe plate. If it is a slab construction, additional planning will berequired to come down from the attic area.X5.3.3 Before cutting the hole in the wall for the mountingbracket, drill the minimum 214-in. (57-mm) up to a maximum2916-in. (65-mm) diameter hole up through the plate and, usinga fla

44、shlight, inspect the interior of the wall to be sure there areno obstructions.X5.3.4 Having determined that there are no obstructions inthe wall, cut a hole for the mounting bracket using a singleblade drywall saw or jig saw.NOTE X5.2Refer to the manufacturers installation manual for confir-mation o

45、f hole size required for mounting brackets and hose inlet-valves.X5.3.5 The end of the tubing is passed up through the holein the plates so as to be visible to the hose inlet-valve opening.NOTE X5.3At this point, follow the manufacturers instructions, asdifferent valves will have different methods o

46、f attachment and wiringinstructions.X5.4 Installation of Hose Inlet-Valves for a New Construc-tion (Unfinished Walls):X5.4.1 Determine the exact location of the hose inlet-valveand mark location on nearest wall stud (usually same height aselectrical outlets).X5.4.2 Drill a minimum 214-in. (57-mm) up

47、 to a maximum2916-in. (65-mm) diameter hole in plate (bottom) centered2 in. from front face and 2 in. from side of stud (see Fig. X5.1).If this is a slab construction you will come down from the atticand drill the minimum 214-in. (57-mm) up to a maximum 2916-in. (65-mm) diameter hole down through th

48、e plate to getinto the wall cavity.X5.4.3 Attach wall valve rough-in plate to stud at markedlocation.X5.4.4 Install pipe to connect rough-in plate to future trunkline using the hole drilled in the plate.X5.4.5 Attach low volt wire to rough-in plate by tying aknot at wire guide hole, then run wire al

49、ong side of tubing backto future trunk line. (Check with local building code for specialrequirements on routing low voltage wire independently fromtubing.)X5.4.6 Install nail guards on plate to protect pipe from wallfasteners (see Fig. X5.2).X5.4.7 Repeat steps X5.4.1-X5.4.6 until all valve rough-inplates are connected to trunk line and accompanying low voltwires have been attached from one valve branch line to anotherwhere they meet the trunk line.NOTE X5.4If trunk line is not being installed at this time and branchlines are just