Tech.Specifications - 191T7023Q0025.pdf

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EMBASSY OF THE UNITED STATES OF AMERICA

Via Veneto 119/A 0187 Rome, Italy

U.S. EMBASSY ROME

AIR CONDITIONING REPLACEMENT AT

TELEPHONE FRAME UNIT AND DATA RACKS

FAC Engineering April 11, 2023

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CHAPTER 1

FOREWORD

The Embassy of the United States in Rome needs to award a contract for the replacement of an existing air conditioning system serving the Telephone frame unit area located at the Mel Sembler Building, Via Sallustiana 49, Rome.

CHAPTER 2

GENERAL

The contractor shall supply all the installation materials and equipment, skilled and unskilled labor, technical supervision, as well as logistic and administrative support. The contractor shall also supply all accessory services such as:

transportation, leasing, equipment and tools, disposal of debris, cleaning the work area and anything else necessary to complete the project in compliance with the present specifications

The COR may schedule some of the operations to be performed after-hours or during the weekend. These activities shall be performed at no extra cost for the Embassy.

Maximum attention is required for the safety of personnel at work on the site.

The workers shall operate in compliance with standard codes. In view of the fact that the work site consists of crucial technical installations, temporary safety protection measures towards third parties and workers shall be installed with care and attention, especially for the hours when site is closed.

The Contractor shall be responsible for submitting, for approval by the COR, samples of materials and supplies to be used.

It shall be Contractor's responsibility to verify all the quantities and dimensions.

Art 2.1

DEFINITIONS

A glossary of terms and relative equivalents used in the drawing up of the tender documents are indicated hereunder:

Client, Administration, Project Supervisor, COR, CO: all these denominations identify the technical administrative staff, predisposed to handle the contract on behalf of the embassy of the United States of America.

Contracting Company, Contractor: all these denominations identify the subject that undertakes to carry out the work described in the contract.

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Contract, Purchase Order (P.O.), Work Order: these terms identify the contract document with which the project is awarded. The Client at his indisputable judgment shall make the formal selection of the different types of documents.

Art 2.2

DESCRIPTION OF WORK

MEL SEMBLER BUILDING TELEPHONE FRAME ROOM

The telephone frame unit at the Mel Sembler Building is currently served by an existing Computer Room Air Conditioning (CRAC) make Emerson HPSC12L000.

The contractor shall replace the existing system with two new packaged floor mounted a/c unit and two new remote condensers. New units shall have a rated total cooling capacity of 11.9 kW and shall be equipped with a BACnet IP module.

The two units shall be part of a sole system and they must be managed by a PLC controller (HIPRO).

The contractor will replace the existing copper pipes with two couples of Ø12 and Ø16 pipes.

Contractor shall supply and install new CAT6 cable to connect the indoor units to the BAS control panel.

The work consists of:

Protection of floor and surfaces with cardboard sheeting and poly sheets.

Removal of all furniture that may impact on the correct execution of the work and transportation to a storage location as directed by the COR, within the Tri-Missions Campus.

Removal of the existing A/C outdoor and indoor units and transportation to authorized landfill

Removal of the existing piping and electrical and communication cables Wall finishing and painting of the walls to restore them to their original conditions Demolition by cut of the masonry walls to run pipes and cables. All pass through-holes in structural masonry and floors, will be reinforced with metal frames in order to maintain structural integrity. if the walls are to be fireproof, additional fireproof plating is to be foreseen with products that guarantee same fireproof characteristics of the walls.

Supply and installation of a new A/C system as described in the drawings. Air conditioning system includes indoor packaged unit, insulated copper pipes (5/8 + 1/2), drainpipes, remote condensers, bus cables, wall mounted control units, fixtures, brackets, additionale refrigerant charge (100g each meter) and additionale oil charge (50g each siphon), etc. The new A/C units shall be equipped with the “long distance kit”, the check valve on the supply and the solenoid valve on the liquid line.

Connect and configure the new A/C system to the existing Building Automation System.

Supply and installation of new electrical and communication cables to feed all the internal units and the remote condensers.

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Supply and installation of new drain lines for the units. The new drain line shall connect to the existing ones and shall be realized with sufficient slope (at least 1,5%) to allow condensate drain by gravity.

Install a new electrical panel to be connected to an existing 40 A circuit breaker on the PM/D1 through a Cu/EPR-XLPE 5G4. The new electrical panel shall be wall mounted, 36 modules, with terminals and transparent door.

Supply and install the new electrical cables as described below. The new panel shall be composed of:

o Magneto thermic, DP main breaker: 4 poles 32A, Ith:32A, Im:320A, Icu/Icn: 6kA o Magneto thermic and GFCI serving the A/C unit 1: 4 poles 20A, Ith:20A, Idn: 0.3 (B type), Im:200A, Icu/Icn: 6kA – electrical cable:

Cu/EPR-XLPE 5G2.5 (FG16OM16) o Magneto thermic and GFCI serving the A/C unit 2: 4 poles 20A, Ith:20A, Idn: 0.3 (B type), Im:200A, Icu/Icn: 6kA – electrical cable:

Cu/EPR-XLPE 5G2.5 (FG16OM16)

Start up of the system by Manufacturer authorized technicians.

CONSULATE DATA RACK

The data rack rooms at the Consulate building are currently cooled by Olympia Splendid UNICO air conditioners. The contractor shall replace the existing systems with a dual split unit composed of two internal units (12000BTU each) and an external unit 24000BTU.

and transportation to a storage location as directed by the COR, within the Tri-Missions Campus.

Removal of the existing A/C outdoor and indoor units and transportation to authorized landfill

Removal of the existing piping and electrical and communication cables Wall finishing and painting of the walls to restore them to their original conditions Close the holes in the window panes to restore them to their original conditions Demolition by cut of the masonry walls and floors to run pipes and cables. All pass through-holes in structural masonry and floors, will be reinforced with metal frames in order to maintain structural integrity. if the walls are to be fireproof, additional fireproof plating is to be foreseen with products that guarantee same fireproof characteristics of the walls.

Supply and installation of a A/C system. The dual split unit system shall be composed of two internal units (12000BTU each) and an external unit 24000BTU, drainpipes, bus cables, wall mounted control units, fixtures, brackets, etc.

Connect and configure the new A/C system to the existing Building Automation System (BACnet or Modbus).

Supply and installation of new electrical and communication cables to feed all the outdoor and indoor units.

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Supply and installation of new drain lines for the units. The new drain line shall be realized with sufficient slope (at least 1,5%) to allow condensate drain by gravity.

Install a new electrical panel to be connected to an existing 20 A circuit breaker on the PB/AU through a Cu/EPR-XLPE 5G4. The new electrical panel shall be wall mounted, IP65, with terminals and transparent door. Supply and install the new electrical cables as described below. The new panel shall be composed of:

o Magneto thermic and GFCI serving the A/C unit 1: 2 poles 20A, Ith:20A, Idn: 0.3 (B type), Im:200A, Icu/Icn: 6kA – electrical cable:

Cu/EPR-XLPE 3G4 (FG16OM16)

USUN DATA RACK

The data rack rooms at the Consulate building are currently cooled by Olympia Splendid UNICO air conditioners. The contractor shall replace the existing systems with a dual split unit composed of two internal units (12000BTU each) and an external unit 24000BTU.

and transportation to a storage location as directed by the COR, within the Tri-Missions Campus.

Removal of the existing A/C outdoor and indoor units and transportation to authorized landfill

Removal of the existing piping and electrical and communication cables Wall finishing and painting of the walls to restore them to their original conditions Close the holes in the window panes to restore them to their original conditions Demolition by cut of the masonry walls and floors to run pipes and cables. All pass through-holes in structural masonry and floors, will be reinforced with metal frames in order to maintain structural integrity. if the walls are to be fireproof, additional fireproof plating is to be foreseen with products that guarantee same fireproof characteristics of the walls.

Supply and installation of a A/C system. The dual split unit system shall be composed of two internal units (12000BTU each) and an external unit 24000BTU, drainpipes, bus cables, wall mounted control units, fixtures, brackets, etc.

Connect and configure the new A/C system to the existing Building Automation System.

Supply and installation of new electrical and communication cables to feed all the outdoor and indoor units.

Supply and installation of new drain lines for the units. The new drain line shall be realized with sufficient slope (at least 1,5%) to allow condensate drain by gravity.

Install a new electrical panel to be connected to an existing 20 A circuit breaker on the PB/AC through a Cu/EPR-XLPE 5G4. The new electrical panel

- 6 -shall be wall mounted, IP65, with terminals and transparent door. Supply and install the new electrical cables as described below. The new panel shall be composed of:

o Magneto thermic and GFCI serving the A/C unit 1: 2 poles 20A, Ith:20A, Idn: 0.3 (B type), Im:200A, Icu/Icn: 6kA – electrical cable:

Cu/EPR-XLPE 3G4 (FG16OM16)

Art 2.3

LIMITATIONS

The accomplishment of the project shall be circumscribed to the specific request described in the Tender Documents.

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Art 2.4

MATERIAL EQUIVALENTS

The Contractor shall verify and ensure that all the materials supplied are new and without defects and that their use and/or installation is carried out using the best techniques and fully respecting the instructions supplied by the manufacturers.

Special parts shall be manufactured solely by workshops that are highly qualified in that specific sector.

The makes indicated in this SOW (Scope of Work) are intended as a point of reference and therefore, the words or approved equivalent are implicit.

Different selections implemented by the Contractor shall be approved in advance by Client after submission of samples and technical cards.

AC INDOOR UNIT

HIREF

www.hiref.com

10JAUR0100_F20

REMOTE CONDENSER

HIREF

www.hiref.com

PEC3N-213 H010M0Q00

SPLIT UNIT

PANASONIC

www.aircon.panasonic.eu

U-71PZH4E5

S-3650PK3E

Art 2.5

TENDER DOCUMENTS

The following documents shall form an integral part of the contract:

- The present Special Tender Document

- General Conditions in use by the Client

- Drawings M101, M102, M103, E101

1. SPECIFICATIONS

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SITE DEMOLITION

PART 1 ‐ REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

National Fire Protection Association (NFPA):

NFPA No. 241 (2000) Standard for Safeguarding Construction, Alterations, and Demolition Operations.

Safety at Work Places:

Law Decree 14 August 1996 “Construction Site Regulations”, Supplements and Amendments.

Trash Disposal:

Law Decree 15 November 1993.

Law Decree 5 February 1997 No. 22 (Decreto Ronchi).

Law Decree 8 November 1997 No. 389.

Decree 1 April 1998 No. 145.

Decree 28 April 1998 No.406, Environmental Department.

Decree 24 June 1998 No. 261.

Circular 4 August 1998 No. GAB/DEC/812/98.

Asbestos Material Treatment:

Law 27.03.1992, No. 257 Norms concerning the discontinuance of the use of the asbestos.

Ministerial Decree 06.09.1994 Norm and technical methodologies for compliance with Law No. 257, dated 27 March 1992, Art. 6, comma 3, and Art. 12, comma 2 concerning the concerning the discontinuance of the use of the asbestos.

Legislative Decree 10.09.1994, No. 626 Implementation of the CEE requirements for improving safety and health of workers on work site.

Legislative Decree 17.03.1995, No. 114 Implementation of the requirements 87/217/CEE concerning the prevention and reduction of the environment pollution due to the asbestos.

Circular No. 7 Explanatory circular of the Ministerial dated 12.04.1995 Decree dated 06.09.1994.

Ministerial Decree 14.05.1996 Norms and technical methodologies for reclamation actions as stated by Law No. 257, dated 27 March 1992, Art.5, comma 1,

- 9 -letter f) concerning: “Norms for the discontinuance of the use of the asbestos”.

Legislative Decree 14.08.1996, No. 494 Implementation of the requirements 92/57/CEE concerning the minimum safety and health requirements to be accomplished in temporary or mobile work sites.

Legislative Decree 05.02.1997, No. 22 Implementation of the requirements 1/156/CEE regarding waste, 91/689/CEE regarding hazardous waste and 94/62/CEE regarding packaging and waste packaging.

Ministerial Decree 12.02.1997 Criteria for homologation of products replacing the asbestos.

Ministerial Decree 26.03.1998 List including the name of the firms and list of the materials replacing the asbestos that have obtained the homologation.

Decree 20.08.1999 Increase of the norms and technical methodologies for reclamation actions as stated by Law No. 257, dated 27 March 1992, Art.5, comma 1, letter f, concerning: “Norms for the discontinuance of the use of the asbestos”.

Deliberation 14.03.2001 Modification to the deliberation dated 1 February 2000, protocol No. 002/CN/ALBO, concerning “Criteria to be enrolled in the Albo Categoria 10: Reclamation of asbestos containing goods” (Deliberation No.

004/CN/Albo).

Decree 25.07.2001 Rectification of Decree 20 August 1999 concerning “Increase of the norms and technical methodologies for reclamation actions as stated by Law No. 257, dated 27 March 1992, Art.5, comma 1, letter f) concerning norms for the discontinuance of the use of the asbestos”.

Decree of the Council of Regulations for the determination of the Ministers President model and the procedures to keep the 10.12.2002, No. 308 register in case of mesothelioma due to the asbestos according to Legislative Decree No. 277, dated 15 August 1991, Art.36, comma 3.

Ministerial Decree 13.03.2003 Criteria of admissibility of the wastes in the dump site.

PART 2 ‐ SUBMITTALS

Statements: A demolition plan giving the procedures proposed for the accomplishment of salvage, demolition and removal work shall be submitted to the Contracting Officer’s Representative and approved before work is started. The procedures shall provide for careful removal and disposition of materials specified to be salvaged and coordination with other work in progress. The procedures shall include a detailed description of the methods and equipment to be used for each operation, the sequence of operations and in case of demolition of adherence built constructions or in case of partial demolitions

- 10 -they shall also include the calculation of provisional structures which are to bear possible walling and, if the size of the work requires it, also a geotechnical report about the adjoining buildings.

PART 3 ‐ GENERAL REQUIREMENTS

The work includes the demolition and/or the removal of all construction indicated or specified. All materials resulting from demolition work, except as indicated or specified otherwise, shall become the property of the Contractor and shall be removed from the limits of Government property. Trash and debris shall be removed from the station daily, unless otherwise directed, and shall not be allowed to accumulate on the site. Such materials which, in the opinion of the Contracting Officer’s Technical Representative, cannot practically be removed daily shall be neatly stored on the site where directed by the Contracting Officer.

PART 4 ‐ DUST AND DEBRIS CONTROL

Dust resulting from salvage, demolition and removal work shall be controlled to prevent the spread of dust and avoid creation of a nuisance in the surrounding area. Use of water will not be permitted when it may result in, or create, hazardous or objectionable conditions such as ice, flooding and pollution.

PART 5 ‐ PROTECTION

Protection of Existing Work from Damage:

Protect existing work which is to remain in place, to be reused, or to remain on the property of the Government by temporary covers, shoring, bracing and supports. Repair such items which are damaged during performance of the work or replace with new. Do not overload structural elements. Provide new supports or reinforcement for existing construction which is weakened by demolition or removal work.

Weather Protection

The interior of the building and all materials and equipment shall be protected from the weather at all times. Where removal of existing roofing is necessary to accomplish work, materials and workmen necessary to provide adequate and approved temporary covering of exposed areas shall be kept in readiness at all times. Temporary coverings shall be attended as necessary to insure their effectiveness and prevent displacement.

Protection of the Trees and Shrubs

Protect trees and shrubs within the project site that might be damaged during demolition, and that are indicated to be left in place. Restore trees scarred or damaged by Contractor equipment

- 11 -or operations to a satisfactory condition or replace them as determined by the Contracting Officer’s Representative.

Facilities

Protect all electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas and temporary services or connections for electrical and mechanical utilities.

Protection of Personnel

Where pedestrians’ and drivers’ safety is endangered in the area of work removal, barricades for traffic shall be used and advance notice shall be given to the Contracting Officer prior to beginning any such work.

PART 6 ‐ USE OF EXPLOSIVES

Use of explosives will not be permitted.

PART 7 ‐ BURNING

Burning will not be permitted.

PART 8 ‐ RELOCATIONS

Perform the removal and reinstallation of relocated items as indicated with workmen skilled in the trades involved. Repair items to be relocated which are damaged or replace damaged items with new undamaged items as approved by the Contracting Officer’s Representative.

PART 9 ‐ DISPOSITION OF MATERIAL

Title to Materials

Title to all materials and equipment to be removed, except as specified otherwise, is vested in the Contractor upon receipt of notice to proceed. The Government will not be responsible for the condition, loss or damage to such property after notice to proceed.

Material to be salvaged

Salvaged material shall be stored as directed by the Contracting Officer.

Reuse of materials and equipment

Carefully remove and store materials indicated to be reused or relocated to

- 12 -prevent damage and reinstall as the work progresses.

PART 10 ‐ CLEAN‐UP

Debris and Rubbish Control

Debris and rubbish shall be removed each day and transported in a manner that will prevent spillage on streets or adjacent areas. Clean up spillage from streets and adjacent areas.

Regulations

National, Provincial, and local regulations regarding hauling and disposal shall be complied with.

BASIC MECHANICAL MATERIALS AND METHODS

PART 11 ‐ APPLICABLE PUBLICATIONS

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

Italian National Institute for the Unification of Standards (UNI) Publications Sheet Metal and Air-Conditioning Contractors' National Association (SMACNA) Publications

Testing, balancing and adjusting of environmental systems.

Directive 2009/125/EC of the European Parliament and of the Council of 21 October

2009 establishing a framework for the setting of ecodesign requirements for energy-related products

HVAC duct construction standards.

HVAC Air Duct Leakage Test Manual.

National Fire Protection Association (NFPA) Publications 90A-93 Standard for the installation of air conditioning and ventilating systems 90B-93 Installation of warm air heating and air conditioning systems

PART 12 ‐ SUBMITTALS

All submittals shall be translated into English. Submit shop drawings, manufacturer's data, publication compliance, certified test reports and manufacturer's certificates of compliance for equipment, materials and finish, and pertinent details for each system where specified in each individual section, and have them approved before procurement, fabrication or delivery of the items to the job site. Partial submittals will not be acceptable and will be returned without review. Submittals shall include the manufacturer's name, trade name, country of origin, catalog model or number, nameplate data, size, layout dimensions, capacity, project specification and the specific technical paragraph reference which specifies each item, applicable U.S., Italian or European Standard, industry and technical society publication references, and other information necessary to establish contract compliance of each item to be furnished.

PART 13 ‐ SHOP DRAWINGS

Drawings shall be a minimum of 210 mm by 275 mm in size. Drawings shall include floor plans, sectional views, wiring diagrams, and installation details of equipment; and equipment spaces identifying and indicating proposed location, layout and arrangement of items of equipment, control panels, accessories, piping, ductwork, and other items that must be shown to assure a coordinated installation. Wiring diagrams shall identify circuit terminals, and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Drawings shall indicate adequate clearance for operation, maintenance and replacement of operating equipment devices.

If equipment is disapproved, drawings shall be revised to show acceptable equipment and be resubmitted prior to proceeding with the work.

PART 14 ‐ MANUFACTURER'S DATA

Submittals for each manufactured item shall be manufacturer's descriptive literature of catalogued products, equipment drawings, diagrams, performance and characteristics curves, and catalog cuts.

PART 15 ‐ PUBLICATION COMPLIANCE

Where equipment or materials are specified to conform to industry and technical society publications of organizations such as International Standards Organization Publications (ISO) and Italian National Institute for the Unification of Standards Publications (UNI) proof of such compliance shall be submitted. The label or listing by the specified organization will be acceptable evidence of compliance. In lieu of the label or listing, submit a certificate from an independent testing organization adequately equipped and competent to perform such services, and approved by the Contracting Officer, stating that the item has been tested in accordance with the specified organization's publication. Where equipment or materials are specified to conform to publications, the manufacturer of the product shall submit a certificate of compliance stating the equipment or materials meet or exceed the performance, design, and product requirements of the referenced publications.

PART 16 ‐ CERTIFIED TEST REPORTS

The testing requirements in referenced publications for materials will be waived provided that the manufacturer's original certificates are submitted stating that previously manufactured materials have been tested by approved laboratories, that such materials meet testing requirements specified, and that the materials furnished for this project are of the same type, quality, manufacture and make as those tested; copies of the test reports don’t need to be submitted except as specifically requested by the Contracting Officer’s Representative.

PART 17 ‐ MANUFACTURER'S CERTIFICATES OF COMPLIANCE

Submit certification from manufacturer attesting that materials and equipment to be furnished for this project comply with the requirements of this specification and of the referenced publications. Pre-printed certifications will not be acceptable; certifications shall be manufacturer's original certifications and shall be no more than one year old.

The certification shall not contain statements that could be interpreted to imply that the product does not meet all requirements specified, such as "as good as;" "achieve the same end use and results as materials formulated in accordance with the referenced publications;" "equal or exceed the service and performance of the specified material."

The certification shall simply state that the product conforms to the requirements specified. Certificates shall be signed by the manufacturer's official authorized to sign certificates of compliance.

PART 18 ‐ POSTED OPERATING INSTRUCTIONS

Furnish approved operating instructions for each principal item of equipment for the use of operation and maintenance personnel. The operating instructions shall include wiring diagrams, control diagrams, and control sequence for each principal item of equipment.

Operating instructions shall be printed or engraved, and shall be framed under glass or in approved laminated plastic and posted where directed. Operating instructions shall be attached to or posted adjacent to each principal item of equipment including start up, proper adjustment, operating, lubrication, shut-down, safety-precautions, procedure in the event of equipment failure, and other items of instruction as recommended by the manufacturer of each item of equipment. Operating instructions exposed to the weather shall be made of weather-resisting materials or shall be suitably enclosed to be weather protected. Operating instructions shall not fade when exposed to sunlight and shall be secured to prevent easy removal or peeling. Operating instructions shall be dual language (English and Italian).

PART 19 ‐ OPERATION AND MAINTENANCE MANUAL

Furnish an operation and maintenance manual in both the Italian and English language for each item of equipment. Furnish three copies of the manual bound in hardback binders and digital copy or an approved equivalent. Furnish one complete manual prior to the time that equipment tests are performed and furnish the remaining manuals before the contract is completed. Inscribe the following identification on the cover: the words OPERATION AND MAINTENANCE MANUAL, in both the Italian and the English languages, the name and location of the equipment or the building, the name of the Contractor and the contract number. The manual shall include the names, addresses and telephone numbers of each subcontractor installing equipment, and of the local representatives for each item of equipment. The manual shall have a table of contents and be assembled to conform to the table of contents with the tab sheets placed before instructions covering the subject. The instructions shall be legible and easily read, with large sheets of drawings folded in. The manual shall include: wiring and control diagrams with data to explain detailed operation and control of each item of equipment;

a control sequence describing start-up, operation and shut-down; description of the function of each principal item of equipment; the procedure for starting; the procedure for operating; shut-down instructions; installation instructions; maintenance instructions;

lubrication schedule including type, grade, temperature range and frequency; safety precautions, diagrams and illustrations; test procedures; performance data; and parts lists. The parts list for equipment shall indicate the sources of the supply, recommended spare parts and the service organization which is reasonably convenient to the project site. The manual shall be complete in all respects for equipment, controls, accessories, and associated appurtenances provided.

PART 20 ‐ INSTRUCTIONS TO PERSONNEL

Furnish the services of competent instructors to give full instruction to the personnel in the adjustment, operation and maintenance, including pertinent safety requirements of each item of equipment and each system. Each instructor shall be thoroughly familiar with all parts of the installation and shall be trained in operating theory as well as practical operation and maintenance work. Instruction shall be given during the first regular work week after the equipment or system has been accepted and turned over for regular operation. Provide 1 workday (8-hours) of instruction to cover all operation and maintenance of equipment and control systems. Instructor shall use the Division “Operation and Maintenance Manual” as a basis for the training. Provide two complete manuals to the Owner for the training.

PART 21 ‐ DELIVERY AND STORAGE

Properly store, adequately protect and carefully handle equipment and materials to prevent damage before and during installation. Handle, store, and protect equipment and materials in accordance with the manufacturer's recommendations. Replace damaged or defective items.

PART 22 ‐ CATALOGUED PRODUCTS

Materials and equipment shall be cataloged products of manufacturers regularly engaged in production of such materials or equipment and shall be manufacturer's latest design that complies with the specification requirements. Materials and equipment shall duplicate items that have been in satisfactory commercial or industrial use. Where two or more items of the same class of equipment are required, these items shall be products of a single manufacturer; however, the component parts of the items need not be the products of the same manufacturer. Each item of equipment shall have the manufacturer's name, address, model number and serial number of the nameplate securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable.

PART 23 ‐ VERIFICATION OF DIMENSIONS

Coordinate the proper relation of the work to the building structure and to the work of all trades. Visit the premises and become familiar with the dimensions in the field, and advise the Contracting Officer’s Representative of any discrepancy before performing any work.

PART 24 ‐ MANUFACTURER'S RECOMMENDATIONS

Where installation procedures or any part thereof are required to be in accordance with the recommendations of the manufacturer of the material being installed, printed copies of these recommendations shall be furnished to the Contracting Officer prior to installation. Installation of the item will not be allowed to proceed until the recommendations are received. Failure to furnish these recommendations can lead to the rejection of the material.

PART 25 ‐ PAINTING OF NEW EQUIPMENT

Equipment painting, factory applied, or shop applied, shall be as specified herein, and provided under each individual section of this specification.

PART 26 ‐ FACTORY PAINTING SYSTEMS

Manufacturer's standard factory painting systems may be provided. If manufacturer's standard factory painting system is being proposed for use in lieu of the shop painting systems, certifications that the manufacturer's standard factory painting system conforms to the heat resistance requirement shall be submitted.

PART 27 ‐ SHOP PAINTING SYSTEMS

Clean, pretreat, prime and paint metal surfaces except aluminum surfaces that shall not be painted. Apply coatings to clean dry surfaces. Clean the surfaces to remove dust, rust, oil and grease by wire brushing and solvent degreasing prior to application of paint, except metal surfaces subject to temperatures exceeding 50oC shall be cleaned to bare metal. Where more than one coat of paint is specified, apply the second coat after the preceding coat is thoroughly dry. Lightly sand damaged painting and retouch before applying the succeeding coat. Finished coat color shall be aluminum or light gray.

PART 28 ‐ IDENTIFICATION OF PIPING

All piping except sanitary waste and vent shall have color-coded identification.

Identification may be by painting and stenciling or by the use of plastic pressure-sensitive adhesive tape installed at maximum 3-meter intervals, and at all horizontal/vertical changes in direction, and at all taps (tees). Piping, except sprinkler systems, shall be identified by black lettering (fluid identification and service i.e. supply or return, and direction of flow) stenciled or lettered on a color-coded background. Color coding shall be in accordance with UNI 5634. Background colors shall be a minimum of 300 mm by 50 mm with minimum 50 mm letters. Identification shall be provided in English and Italian and placed on piping so that it is easily visible.

REFRIGERANT PIPING

PART 1 ‐ GENERAL

PART 2 ‐ REFERENCES

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to within the text by the basic designation only.

Italian National Institute for the Unification of Standards (UNI) Publications

UNI 5733 (1965) Countersunk Flat Nib Bolts and Bolts with Hexagon Nut. ISO Metric Coarse Thread. Finish C.

UNI EN 12735-1:2008 "Rame e leghe di rame - tubi di rame tondi senza saldatura per condizionamento e refrigerazione - tubi per sistemi di tubazioni".

UNI EN 12735-2:2008 "Rame e leghe di rame - tubi di rame tondi senza saldatura per condizionamento e refrigerazione - tubi per apparecchiature".

UNI EN 22553:1997 "Giunti saldati e brasati. Rappresentazione simbolica delle saldature sui disegni".

UNI EN 764-2:2003 "Attrezzature a pressione - Grandezze, simboli e unità di misura".

UNI EN 764-3:2003 "Attrezzature a pressione - definizione delle parti coinvolte".

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 15 & 34 (2013) ASHRAE Standard 34-2016 Safety Standard for Refrigeration Systems/

ASHRAE Standard 34-2016 Designation and Safety Classification of Refrigerants

ASHRAE 17 (2015) Method of Testing Capacity of Thermostatic Refrigerant Expansion Valves

AMERICAN WELDING SOCIETY (AWS)

AWS A5.8/A5.8M (2019) Specification for Filler Metals for Brazing and Braze Welding

AWS A5.31/A5.31M (2012) Specification for Fluxes for Brazing and Braze Welding

AWS BRH (2007; 5th Ed) Brazing Handbook

AWS D1.1/D1.1M (2020) Structural Welding Code - Steel

AWS Z49.1 (2012) Safety in Welding and Cutting and Allied Processes

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-58 (2018) Pipe Hangers and Supports - Materials, Design and Manufacture, Selection, Application, and Installation

PART 3 ‐ SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification.

Submittals not having a "G" or "S" classification are for Contractor Quality Control approval.

Submit the following:

Shop Drawings Refrigerant Piping System; G Product Data Refrigerant Piping System Spare Parts Qualifications Refrigerant Piping Tests Verification of Dimensions Test Reports Refrigerant Piping Tests Operation and Maintenance Data Maintenance; G Operation and Maintenance Manuals; G

Demonstrations; G

PART 4 ‐ QUALITY ASSURANCE

PART 5 ‐ Qualifications Submit 1 copy of qualified procedures, and list of names and identification symbols of qualified welders and welding operators, prior to non-factory welding operations. Weld piping in accordance with the qualified procedures using performance qualified welders and welding operators. Notify the Contracting Officer Representative 24 hours in advance of tests to be performed at the work site, if practical. The welder or welding operator must apply the personally assigned symbol near each weld made, as a permanent record.

PART 6 ‐ Contract Drawings Because of the small scale of the drawings, it is not possible to indicate all offsets, fittings, and accessories that may be required. Carefully investigate the plumbing, fire protection, electrical, structural and finish conditions that would affect the work to be performed and arrange such work accordingly, furnishing required offsets, fittings, and accessories to meet such conditions.

PART 7 ‐ DELIVERY, STORAGE, AND HANDLING

Protect stored items from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Proper protection and care of all material both before and during installation is the Contractor's responsibility. Replace any materials found to be damaged at the Contractor's expense. During installation, cap piping and similar openings to keep out dirt and other foreign matter.

PART 8 ‐ PRODUCTS

PART 9 ‐ STANDARD COMMERCIAL PRODUCTS

a. Provide materials and equipment which are standard products of a manufacturer regularly engaged in the manufacturing of such products, that are of a similar material, design and workmanship and that have been in satisfactory commercial or industrial use for 2 years prior to bid opening.

b. The 2 year use must include applications of equipment and materials under similar circumstances and of similar size. The 2 years' experience must be satisfactorily completed by a product which has been sold or is offered for sale on the commercial market through advertisements, manufacturer's catalogs, or brochures. Products having less than a 2‐year field service record will be acceptable if a certified record of satisfactory field operation, for not less than 6000 hours exclusive of the manufacturer's factory tests, can be shown.

c. Products must be supported by a service organization. System components must be environmentally suitable for the indicated locations. Submit a certified list of qualified permanent service organizations for support of the equipment which includes their addresses and qualifications. The service organizations must be reasonably convenient to the equipment installation and be able to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

d. Exposed equipment moving parts, parts that produce high operating temperature, parts which may be electrically energized, and parts that may be a hazard to operating personnel must be insulated, fully enclosed, guarded, or fitted with other types of safety devices.

Install safety devices so that proper operation of equipment is not impaired. Welding and cutting safety requirements must be in accordance with AWS Z49.1.

e. Provide the manufacturer's standard catalog data, at least 5 prior to the purchase or installation of a particular component. Highlight the data to show information such as, but not limited to, material, size, options, performance charts, and curves in adequate detail to demonstrate compliance with contract requirements. Include the manufacturer's recommended installation instructions and procedures in the data provided. Provide data for the following components as a minimum:

(1) Piping and Fittings

(2) Valves

(3) Piping Accessories

(4) Pipe Hangers, Inserts, and Supports

PART 10 ‐ REFRIGERANT PIPING SYSTEM

Provide refrigerant piping, valves, fittings, and accessories in accordance with ASHRAE 15 & 34 and ASME B31.5, except as specified herein. Refrigerant piping, valves, fittings, and accessories must be compatible with the fluids used and capable of withstanding the pressures and temperatures of the service. Refrigerant piping, valves, and accessories used for refrigerant service must be cleaned, dehydrated, and sealed (capped or plugged) prior to shipment from the manufacturer's plant. Submit drawings, at least 5 weeks prior to beginning construction, provided in adequate detail to demonstrate compliance with contract requirements. Drawings must consist of:

a. Piping layouts which identify all valves and fittings.

b. Plans and elevations which identify clearances required for maintenance and operation.

PART 11 ‐ PIPE, FITTINGS AND END CONNECTIONS (JOINTS)

PART 12 ‐ 2.4.3 Copper Tubing The pipe work shall be of refrigerant quality copper to BS2871 Part 2, ASTM 280, DIN1754/8905 half hard tempered. Soft tempered pipe work may be used where the pipe diameter is 1/4” or 3/8”. Long radius bends shall be formed using pipe bender. The use of short radius pre formed bends and elbows should be avoided to minimize pressure drop and possibility of leaks Provide copper tubing annealed or hard drawn as required. Copper tubing must be compliant to BS2871 Part 2, ASTM 280, DIN1754/8905.

Soft annealed copper tubing must not be used in sizes larger than 35 mm 1-3/8 inches.

Joints must be brazed. Cast copper alloy fittings for flared copper tube must conform to ASME B16.26 and ASTM B62. Wrought copper and bronze solder-joint pressure fittings must conform to ASME B16.22 and ASTM B75/B75M. Joints and fittings for brazed joint must be wrought-copper or forged-brass sweat fittings. Cast sweat-type joints and fittings are not allowed for brazed joints. Brass or bronze adapters for brazed tubing may be used for connecting tubing to flanges and to threaded ends of valves and equipment.

PART 13 ‐ Solder Solder must conform to ASTM B32, grade Sb5, tin-antimony alloy for service pressures up to 1034 kPa 150 psig. Solder flux must be liquid or paste form, non-corrosive and conform to ASTM B813.

PART 14 ‐ Brazing Filler Metal Filler metal must conform to AWS A5.8/A5.8M, Type BAg-5 with AWS Type FB3-A or Type FB3-C flux, except Type BCuP-3, BCuP-4, or BCuP-5 may be used for brazing copper-to-copper joints. BAlSi-4 with AWS Type FB1-A flux may be used when joining copper piping to aluminum components.

PART 15 ‐ Brazing Flux Brazing flux must conform to AWS A5.31/A5.31M, Type FB3-A or Type FB3-C when using Type BAg-5 filler metal. Type FB1-A is to be used with Type BAlSi-4 filler metal.

2.4.7 Press Fittings Press fittings are not acceptable for use in refrigerant piping systems.

PART 16 ‐ VALVES

Valves must be designed, manufactured, and tested specifically for refrigerant service.

The valve material and all internal components must be compatible with the specific refrigerant and lubricant used. Valve bodies must be of brass, bronze, steel, or ductile iron construction. Valves 25 mm 1 inch and smaller must have brazed or socket welded connections. Valves larger than 25 mm 1 inch must have butt welded end connections.

Do not use threaded end connections, except in pilot pressure or gauge lines where maintenance disassembly is required and welded flanges cannot be used. Internal parts must be removable for inspection or replacement without applying heat or breaking pipe connections. Valve stems exposed to the atmosphere must be stainless steel or corrosion resistant metal plated carbon steel. Direction of flow must be legibly and permanently indicated on the valve body. Control valve inlets must be fitted with integral or adapted strainer or filter where recommended or required by the manufacturer.

Purge, charge and receiver valves must be of manufacturer's standard configuration.

PART 17 ‐ Refrigerant Stop Valves Valve must be the globe or full-port ball type with a back-seating stem especially packed for refrigerant service. Valve packing must be replaceable under line pressure.

Provide valve with a handwheel or wrench operator and a seal cap. Valve must be the straight or angle pattern design as indicated.

PART 18 ‐ Check Valves Valve must be the swing or lift type as required to provide positive shutoff at the differential pressure indicated. Valve must be provided with resilient seat.

PART 19 ‐ Liquid Solenoid Valves Provide valves that comply with AHRI 760 I-P and are suitable for continuous duty with applied voltages 15 percent under and 5 percent over nominal rated voltage at maximum and minimum encountered pressure and temperature service conditions.

Valves must be direct-acting or pilot-operating type, pack-less, except that packed stem, seal capped, manual lifting provisions must be furnished. Provide solenoid coils that are moisture-proof, UL approved, totally encapsulated or encapsulated and metal jacketed as required. Valves must have safe working pressure of 4206 kPa 610 psi and a maximum operating pressure differential of at least 1375 kPa 200 psi at 85 percent rated voltage. Valves must have an operating pressure differential suitable for the refrigerant used.

PART 20 ‐ Expansion Valves Provide valve conforming to AHRI 751 SI AHRI 750 I-P and ASHRAE 17. Valve must be the diaphragm and spring-loaded type with internal or external equalizers, and bulb and capillary tubing. Provide valve with an external superheat adjustment along with a seal cap. Internal equalizers may be utilized where flowing refrigerant pressure drop between outlet of the valve and inlet to the evaporator coil is negligible and pressure drop across the evaporator is less than the pressure difference corresponding to 1 degree C 2 degrees F of saturated suction temperature at evaporator conditions. Bulb charge must be determined by the manufacturer for the application and such that liquid will remain in the bulb at all operating conditions. Do not use gas limited liquid charged valves and other valve devices for limiting evaporator pressure without a distributor or discharge tube or effective means to prevent loss of control when bulb becomes warmer than valve body. Pilot-operated valves must have a characterized plug to provide required modulating control. A de-energized solenoid valve may be used in the pilot line to close the main valve in lieu of a solenoid valve in the main liquid line. Provide an isolatable pressure gauge in the pilot line, at the main valve. Automatic pressure reducing or constant pressure regulating expansion valves may be used only where indicted or for constant evaporator loads.

PART 21 ‐ Electronic Expansion Valves Valve must conform to AHRI 1371 SIAHRI 1370 I-P and ASHRAE 17. The valve must prevent the return of liquid to the compressor in the event of power loss or low superheat.

PART 22 ‐ Safety Relief Valves Valve must be the two-way type, unless indicated otherwise. Valve must bear the ASME code symbol. Valve capacity must be certified by the National Board of Boiler and Pressure Vessel Inspectors. Valve must be of an automatically reseating design after activation.

PART 23 ‐ Evaporator Pressure Regulators, Direct‐Acting Valve must include a diaphragm/spring assembly, external pressure adjustment with seal cap, and pressure gauge port. Valve must maintain a constant inlet pressure by balancing inlet pressure on diaphragm against an adjustable spring load. Pressure drop at system design load must not exceed the pressure difference corresponding to a 1 degree C 2 degrees F change in saturated refrigerant temperature at evaporator operating suction temperature. Spring must be selected for indicated maximum allowable suction pressure range.

PART 24 ‐ Refrigerant Access Valves Provide refrigerant access valves and hose connections in accordance with AHRI 720.

PART 25 ‐ PIPING ACCESSORIES

PART 26 ‐ Filter Driers Driers must conform to AHRI 711AHRI 710 I-P. Sizes 15 mm 5/8 inch and larger must be the full flow, replaceable core type. Sizes 13 mm 1/2 inch and smaller must be the sealed type. Cores must be of suitable desiccant that will not plug, cake, dust, channel, or break down, and must remove water, acid, and foreign material from the refrigerant.

Construct filter driers so that none of the desiccant will pass into the refrigerant lines.

Minimum bursting pressure must be 10.3 MPa 1,500 psi.

PART 27 ‐ Sight Glass and Liquid Level Indicator

PART 28 ‐ Assembly and Components

Assembly must be pressure- and temperature-rated and constructed of materials suitable for the service. Glass must be borosilicate type. Ferrous components subject to condensation must be electro-galvanized.

PART 29 ‐ Gauge Glass Gauge glass must include top and bottom isolation valves fitted with automatic checks, and packing followers; red-line or green-line gauge glass; elastomer or polymer packing to suit the service; and gauge glass guard.

PART 30 ‐ Bull's‐Eye and Inline Sight Glass Reflex Lens

Provide bull's-eye and inline sight glass reflex lens for dead-end liquid service. For pipe line mounting, provide two plain lenses in one body suitable for backlighted viewing.

PART 31 ‐ Moisture Indicator

Indicator must be a self-reversible action, moisture reactive, color changing media.

Indicator must be furnished with full-color-printing tag containing color, moisture, and temperature criteria. Unless otherwise indicated, the moisture indicator must be an integral part of each corresponding sight glass.

PART 32 ‐ Vibration Dampeners Dampeners must be of the all-metallic bellows and woven-wire type.

PART 33 ‐ Flexible Pipe Connectors Connector must be a composite of interior corrugated phosphor bronze or Type 300 Series stainless steel, as required for fluid service, with exterior reinforcement of bronze, stainless steel or monel wire braid. Assembly must be constructed with a safety factor of not less than 4 at 150 degrees C300 degrees F. Unless otherwise indicated, the length of a flexible connector must be as recommended by the manufacturer for the service intended.

PART 34 ‐ Strainers Strainers used in refrigerant service must have brass or cast-iron body, Y-or angle-pattern, cleanable, not less than 60-mesh noncorroding screen of an area to provide net free area not less than ten times the pipe diameter with pressure rating compatible with the refrigerant service. Screens must be stainless steel or monel and reinforced spring-loaded where necessary for bypass-proof construction.

PART 35 ‐ Pressure and Vacuum Gauges Provide gauges conforming to ASME B40.100 with throttling type needle valve or a pulsation dampener and shut-off valve. Gauge must be a minimum of 85 mm 3-1/2 inches in diameter with a range from 0 kPa 0 psig to approximately 1.5 times the maximum system working pressure. Select each gauge range so that at normal operating pressure, the needle is within the middle-third of the range.

PART 36 ‐ Temperature Gauges Provide industrial duty type temperature gauges for the required temperature range.