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DocuSign Envelope ID: 9826C043- 4C32- 49CD- A4CC- DC28ABAB7CE7 <br />SECTION 236000 - COMMON WORK RESULTS FOR HVAC <br />E. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal, but no higher than 3' <br />above finished ceilings to allow for convenient access for servicing. <br />F. Install piping to permit valve servicing. <br />G. Install piping at indicated slopes. <br />H. Install piping free of sags and bends. <br />I. Install fittings for changes in direction and branch connections. <br />J. Install piping to allow application of insulation. <br />K. Select system components with pressure rating equal to or greater than system operating pressure. <br />L. Install escutcheons for penetrations of walls, ceilings, and floors. <br />M. Install sleeves for pipes passing through concrete and masonry walls, gypsum -board partitions, and concrete <br />floor and roof slabs. <br />N. Aboveground, Exterior -Wall Pipe Penetrations: Seal penetrations using sleeves and mechanical sleeve seals. <br />Select sleeve size to allow for 1 -inch annular clear space between pipe and sleeve for installing mechanical <br />sleeve seals. <br />1. Install steel pipe for sleeves smaller than 6 inches in diameter. <br />2. Install cast -iron "wall pipes" for sleeves 6 inches and larger in diameter. <br />3. Mechanical Sleeve Seal Installation: Select type and number of sealing elements required for pipe <br />material and size. Position pipe in center of sleeve. Assemble mechanical sleeve seals and install in <br />annular space between pipe and sleeve. Tighten bolts against pressure plates that cause sealing <br />elements to expand and make watertight seal. <br />O. Underground, Exterior -Wall Pipe Penetrations: Install cast -iron "wall pipes" for sleeves. Seal pipe <br />penetrations using mechanical sleeve seals. Select sleeve size to allow for 1 -inch annular clear space <br />between pipe and sleeve for installing mechanical sleeve seals. <br />1. Mechanical Sleeve Seal Installation: Select type and number of sealing elements required for pipe <br />material and size. Position pipe in center of sleeve. Assemble mechanical sleeve seals and install in <br />annular space between pipe and sleeve. Tighten bolts against pressure plates that cause sealing <br />elements to expand and make watertight seal. <br />P. Fire- Barrier Penetrations: Maintain indicated fire rating of walls, partitions, ceilings, and floors at pipe <br />penetrations. Seal pipe penetrations with firestop materials. Refer to Division 23 Section "Penetration <br />Firestopping" for materials. <br />Q. Verify final equipment locations for roughing -in. <br />R. Refer to equipment specifications in other Sections of these Specifications for roughing -in requirements. <br />3.22 DIELECTRIC FITTINGS <br />A. Description: Combination fitting of copper alloy and ferrous materials with threaded, solder - joint, plain, or <br />weld -neck end connections that match piping system materials. <br />B. Insulating Material: Suitable for system fluid, pressure, and temperature. <br />C. Dielectric Unions: Factory- fabricated, union assembly, for 250 -psig minimum working pressure at 180 deg F. <br />D. Dielectric Flanges: Factory- fabricated, companion - flange assembly, for 150- or 300 -psig minimum working <br />pressure as required to suit system pressures. <br />E. Dielectric Couplings: Galvanized -steel coupling with inert and noncorrosive, thermoplastic lining; threaded <br />ends; and 300 -psig minimum working pressure at 225 deg F. <br />Reece, Noland & McElrath, Inc. 236000-12 Orange County Board of Elections <br />Orange Co., NC 05/04/18 <br />