Attachement 2 - Technical Specifications.pdf

EMBASSY OF THE UNITED STATES OF AMERICA

Via Veneto 119/A 0187 Rome, Italy

U.S. EMBASSY ROME

AIR CONDITIONING REPLACEMENT AT

SERVER ROOMS

FAC Engineering 01/26/2026

FOREWORD

The Embassy of the United States in Rome needs to award a contract for the replacement of an existing air conditioning system serving two IT rooms located at the Mel Sembler Building and Chancery building, Via Sallustiana 49, Rome.

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.

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.

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.

PARKING

No parking is allowed inside Embassy grounds. The Contractor's vehicles shall be allowed to enter only for loading and unloading materials.

Loading and unloading operations shall be carried out using only one vehicle at a time.

Consequently, during the accomplishment of the project the Contractor shall ensure that its vehicles are parked at its own expense outside the Government property.

SAFETY STANDARDS

The Contractor shall comply with all the applicable health and safety obligations provided by Legislative Decree No. 81/2008 (Consolidated Law on Occupational Health and Safety). The main objective is to eliminate or, where not possible, to reduce to the minimum any exposure of workers to risks arising from work-related activities. To this end, the Contractor is required, when applicable, to submit the Risk Assessment Document (Documento di Valutazione dei Rischi – DVR) or the Operational Safety Plan (Piano Operativo di Sicurezza – POS), to provide adequate and documented training to workers, to supply appropriate individual and collective protective equipment (PPE and CPE), and to fully comply with all the other obligations set forth under Legislative Decree 81/2008.

Submission of the Operational Safety Plan (POS)

Within 10 calendar days after receiving the Notice to Proceed, the awarded Contractor must submit a detailed Operational Safety Plan (POS). The POS must clearly identify the following key professional figures:

Site Technical Director (Direttore Tecnico di Cantiere):

The individual responsible for managing the construction site on behalf of the Contractor. This role may be fulfilled by either an internal employee or an external professional formally appointed by the company. This figure is not to be confused with the Construction Supervisor (Direttore dei Lavori), who is appointed by the Client and is responsible for verifying that the works are carried out in compliance with thedesign and technical specifications.

Supervisor (Preposto):

An individual who, by the nature of their duties, supervises the work of others (e.g., site manager, workshop head, department chief). The Supervisor must be adequately trained to fulfill the responsibilities assigned under Art. 19, paragraph 1, letter g) and in accordance with the objectives of Art. 37 of Legislative Decree 81/2008. The Supervisor shall ensure, continuously and effectively, that:

1. Workers comply with safety instructions and the provisions of the safety plan;

2. Personal protective equipment (PPE) is used as required;

3. Any deficiencies in procedures, tools, PPE, or persistent non-compliance are promptly reported to the employer or manager.

The contractor has to send the list of personnel who will work on site. The workers have to be regularly registered and if there is a subcontractor this has to present the documents requested too.

All workers have to understand and speak Italian.

DESCRIPTION OF WORK

PROJECT MANAGER SITE PRESENCE AND REPORTING

The Project Manager shall be present on site on a daily basis for the entire duration of the works.

Prior to each site visit, the Project Manager shall notify the Contracting Officer's Representative (COR) of his/her presence. At the end of each working day, the Project Manager shall submit to the COR a written daily inspection report in English, documenting the activities carried out, the number and roles of personnel on site, the status of materials and equipment deliveries, any issues or non-conformities identified, and any actions taken or planned to address them. The daily inspection report shall be submitted in a format approved by the COR and shall constitute an official record of the progress of the works. Failure to maintain the required site presence or to submit the daily inspection report may be considered a material breach of contract obligations.

MEL SEMBLER BUILDING SERVER ROOM

The server room at the Mel Sembler Building is currently served by an existing Computer Room Air Conditioning (CRAC) system composed of three units make Emerson HPM S20.

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 20.0 kW each 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).

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

The work consists of:

• Site preparation, including installation of fences, temporary staging areas, and protection of materials, furniture, floors, and walls.

• Removal and storage of all furniture that may interfere with the work, as directed by the

COR.

• Draining of refrigerant circuits from the units and remote condensers, with recovery and disposal of R407c gas in accordance with regulations.

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

• Removal of existing pipes and of 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, drainpipes, remote condensers, bus cables, wall mounted control units, fixtures, brackets, additional refrigerant charge (100g each meter) and additional 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. Refrigerant lines shall be 3/4"- 1/2". Provide 3 siphon traps on the vertical section.

Oil addition: mod. FV68S: + 100g

• 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.

• 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/D2 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.

CHANCERY SERVER ROOM

The server room at the Mel Sembler Building is currently served by an existing Computer Room Air Conditioning (CRAC) system composed of two units make Emerson HPM S07.

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 8.0 kW each 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 test the existing refrigerant piping for leaks. Locate and repair any leak found during this process. Existing pipes shall be cleaned, flushed and prepared for reuse with new R410A units. This includes recovery on residual refrigerant, internal chemical flushing with approved flushing agent, nitrogen blowing, deep vacuum drying, replacement of filters driers and preparation of piping for R410A operation.

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

• Removal and storage of all furniture that may interfere with the work, as directed by the

COR.

• Draining of refrigerant circuits from the units and remote condensers, with recovery and disposal of R407c gas in accordance with regulations.

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

• Removal of the electrical and communication cables

• Wall finishing and painting of the walls to restore them to their original conditions

• Supply and installation of a new A/C system as described in the drawings. Air conditioning system includes indoor packaged unit, drainpipes, remote condensers, bus cables, wall mounted control units, fixtures, brackets, additional refrigerant charge (100g each meter), 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. Refrigerant lines shall be 3/4"- 1/2".

Provide 3 siphon traps on the vertical section. Oil addition: mod. FV68S: + 100g

• 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.

• 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 5G2.5. 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 40A, Ith:40A, Im:400A, 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)

MEL SEMBLER BUILDING UPS ROOM

The UPS room at the Mel Sembler Building is currently cooled by a residential split unit (12000BTU). The contractor shall replace the existing system with a split unit dedicated to IT equipment.

• Removal and storage of all furniture that may interfere with the work, as directed by the

COR.

• Draining of refrigerant circuits from the units and remote condensers, with recovery and disposal of R410a gas in accordance with regulations.

• 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

• Supply and installation of a new A/C system as described in the drawings. Air conditioning system includes indoor unit, refrigerant lines, drainpipes, outdoor unit, bus cables, wall mounted control units, fixtures, brackets, additional refrigerant charge (100g each meter).

Refrigerant lines shall be 1/2"- 5/16". Provide 3 siphon traps on the vertical section. Oil addition: mod. RB68A: + 50g. Outdoor unit will need to be installed in the MSB courtyard and new refrigerant lines to be installed on the façade protected by a conduit.

• 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 the unit.

• 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.

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 Chancery - 10JAUR0060_F10

MSB - 10JAUR0190_F30

REMOTE CONDENSER

HIREF

www.hiref.com Chancery - PEC3N-212 H010M0Q00 0

MSB - PEC3N-423 H010M0Q00 0

SPLIT UNIT

HIREF

www.hiref.com

20HTI00351_F1 W0

http://www.hiref.com/

MAINTENANCE PLAN

At completion of project, the contractor shall submit the preventive maintenance plan of all the equipment installed within the scope of the project, as follows.

List in detail the new equipment installed and submit the list to the COR.

The COR shall review the list and will give the contractor the standard inventory card for each type of equipment. Also, the COR will give the contractor the “Check list” detailing the standard OBO preventive maintenance activity for each type of equipment together with the required schedule, i.e. monthly, semiannual or annual schedule.

The contractor shall fill in the inventory cards for all equipment and shall submit to the COR the entire maintenance plan on paper.

STRUCTURE DEMOLITION SECTION 024116

FAC ENGINEERING ROME 024116 – 1 May 23, 2026 | Rev. 0

SECTION 024116

STRUCTURE DEMOLITION

Technical Specification — Coordinated with Italian / EU Standards

FAC ENGINEERING ROME | May 23, 2026 | Rev. 0

FAC ENGINEERING ROME 024116 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 024119 – Selective Demolition

2. Section 033000 – Cast-in-Place Concrete (for new structural elements after demolition)

3. Section 134813 – Acoustic Equipment Enclosures

1.2 SUMMARY

A. Scope: Complete demolition of existing structures as shown on drawings; including reinforced concrete frames, masonry walls, floor slabs, foundations, and all embedded services within the demolition envelope.

B. Work includes:

1. Pre-demolition survey and structural assessment

2. Disconnection and capping of all utilities within demolition zone

3. Controlled demolition of structural elements

4. Removal and disposal of all demolition debris

5. Controlled demolition methods for reinforced concrete with diamond wire saw, hydraulic splitter, or other controlled technique where vibration or noise limits apply

6. Environmental protection and dust/noise control throughout

C. Do not demolish elements shown to remain. Verify demolition limits with Engineer before commencing each phase.

1.3 DEFINITIONS

A. PSC (Site Safety and Coordination Plan): mandatory safety and coordination plan per D.Lgs. 81/2008 art. 91; prepared by CSP (Design Safety Coordinator).

B. POS (Piano Operativo di Sicurezza): contractor's operational safety plan; per art. 96 D.Lgs. 81/2008.

C. Exclusion from Demolition (Keep): elements, finishes, or structures designated to remain; shown with hatching on demolition drawings.

D. Debris: demolished material; shall be sorted on site into waste streams (concrete, steel rebar, masonry, timber, mixed) for regulated disposal.

E. CER (European Waste Code): EU waste classification code per D.Lgs. 152/2006; demolition contractor to classify all waste streams before transport.

1.4 APPLICABLE STANDARDS

Key Applicable Standards

EN 13670 Execution of concrete structures

EN 1992-1-1 Eurocode 2 – Design of concrete structures

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018)

UNI EN 12111 Tunnelling machines – road headers, continuous miners and impact rippers

EN ISO 4413 Hydraulic fluid power – general rules and safety requirements for systems

D.Lgs. 81/2008 Consolidated Safety Act – Title IV (Temporary and Mobile Worksites)

D.Lgs. 152/2006 Management of demolition waste – classification and disposal

UNI 11716 Demolition and deconstruction of buildings – guidelines

FAC ENGINEERING ROME 024116 – 3 May 23, 2026 | Rev. 0

EN 474-1 Earth-moving machinery – safety – general requirements

EN 791 Drill rigs – safety

ISO 9613-2 Acoustics – attenuation of sound during outdoor propagation

UNI EN 1992-1-1 Eurocode 2 – Design of concrete structures

UNI EN 206 Concrete – specification and performance

DM 17/01/2018 Norme Tecniche per le Costruzioni (NTC 2018) – Italian technical standards for construction

Circ. 21/01/2019 n.7 NTC 2018 application instructions

D.M. 37/2008 Building systems – installer qualifications and requirements

D.Lgs. 192/2005 e s.m.i. Energy performance of buildings

D.Lgs. 81/2008 Consolidated Workplace Safety Act

D.P.R. 380/2001 Consolidated Building Code

1.5 SUBMITTALS

A. Pre-demolition structural survey: signed by structural engineer; identifying condition of elements, asbestos/hazardous materials survey, and demolition sequence recommendation.

B. Demolition plan (Piano di Demolizione): per D.Lgs. 81/2008 Allegato IX; phased sequence; shoring and propping requirements; vibration and noise predictions.

C. POS (Piano Operativo di Sicurezza): specific to demolition contractor activities; before commencement.

D. Waste management plan: CER codes for each waste stream; licensed carrier details; disposal facility acceptance certificates.

E. Vibration monitoring plan: sensor placement, threshold levels, and response protocol; where demolition is within 20 m of existing structures to remain.

F. Noise management plan: where works are within 200 m of noise-sensitive receptors; per D.P.C.M.

01/03/1991.

1.6 QUALITY ASSURANCE

A. Demolition contractor: qualified with evidence of prior RC demolition projects of comparable size; submit references.

B. Safety: D.Lgs. 81/2008 Titolo IV governs all site operations; PSC and POS mandatory; CSE

(Coordinator for Execution) to be appointed by Client.

C. Asbestos: if asbestos-containing materials are identified, stop demolition; notify authority (ASL) per

D.Lgs. 81/2008 art. 246; engage specialist asbestos removal contractor before resuming.

D. Vibration limits: peak particle velocity (PPV) per DIN 4150-3 at retained structures; limit as noted or ≤ 5 mm/s at foundations of structures to remain.

E. Dust: wet suppression or screening mandatory when demolishing masonry or concrete; no dry sweeping of debris on or near access routes.

1.7 UTILITY DISCONNECTION

A. Before demolition commences: identify, isolate, test dead, and cap or remove all utilities within demolition envelope.

B. Sequence: electricity (cut and cap at distribution board); gas (cap at service); water (drain and cap);

telecoms (cut and cap); district heating/cooling (drain and cap).

C. Obtain written confirmation from each utility company that services are disconnected before starting demolition near service routes.

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PART 2 – PRODUCTS

2.1 DEMOLITION METHODS AND EQUIPMENT

A. Mechanical demolition: hydraulic excavator with breaker or crusher jaw; for unrestricted demolition areas away from retained structures.

B. Controlled demolition – RC: diamond wire saw, wall saw, floor saw, or hydraulic rock splitter; where vibration must be minimised (< 5 mm/s PPV at adjacent structures).

C. Hand tools: electric or pneumatic demolition hammers for small-scale and precision work; concrete saws for cutting openings in slabs.

D. Craneage: where large elements are to be cut and lowered by crane; structural calculations for lifting weights required.

E. Prohibition: explosive demolition not permitted without written approval from Engineer and local authority.

2.2 SHORING AND PROPPING

A. Provide temporary shoring to all retained structural elements that may be affected by removal of adjacent structure.

B. Design: temporary works engineer to design all shoring systems; calculations submitted before installation.

C. Materials: steel props, acrow props, or structural timber; rated for imposed loads; no improvised propping.

D. Maintain shoring until permanent structure can take loads; do not remove until directed by Engineer.

2.3 PROTECTIVE MEASURES

A. Hoarding: solid timber or steel hoarding around demolition zone; 2.4 m minimum height; warning signs and site lighting.

B. Debris netting: scaffold with fine-mesh debris netting on all open faces of demolition; prevent projectiles.

C. Dust suppression: continuous water misting during breaking; site water supply and pump as required.

D. Vibration monitoring: continuous monitoring at nearest retained structure during all breaking;

automatic alarm at 80% of limit; stop work at 100%.

PART 3 – EXECUTION

3.1 EXAMINATION AND PRE-DEMOLITION SURVEY

A. Carry out comprehensive visual survey of all elements to be demolished; note condition, structural system, and any deviation from drawings.

B. Survey adjacent retained structures for pre-existing cracks and defects; photographically document condition before demolition.

C. Test all utility isolations before commencing; use voltage detector and pressure gauge as appropriate.

3.2 DEMOLITION SEQUENCE

A. Demolish in reverse order of construction: remove fit-out and secondary elements first; then non-structural partitions; then structural floors from top down; then frames; finally foundations.

B. Maintain stability of remaining structure at all phases; do not create cantilever conditions not accounted for in demolition plan.

C. At each phase boundary: pause, inspect, consult with structural engineer if any concern, confirm next phase before proceeding.

D. Do not allow overloading of floors or slabs with demolition debris; remove debris progressively.

3.3 REINFORCED CONCRETE DEMOLITION

A. Breaking: hydraulic breaker where vibration is not restricted; diamond sawing where vibration must be controlled.

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B. Rebar: cut flush with concrete surface where adjacent to retained structure; bend and cap protruding rebar if left in place during construction phase.

C. Foundations: break to full depth shown; remove all concrete from foundation pit; clean base for new construction.

D. Dust from cutting: diamond saw blade with integral water cooling; apply dust suppression at all cutting locations.

3.4 WASTE MANAGEMENT

A. Sort demolished materials on site into CER-classified streams:

1. Concrete and masonry: CER 17 01 01 (concrete) – inert; suitable for licensed inert landfill or recycled aggregate

2. Mixed metals (rebar, steel sections): CER 17 04 05 – recyclable; to licensed metal recycler

3. Timber: CER 17 02 01 – if untreated, compostable; if painted/treated, hazardous waste stream

4. Mixed demolition waste: CER 17 09 04 – to licensed non-hazardous construction waste facility

5. Asbestos (if encountered): CER 17 06 05 – hazardous; specialist contractor only; notify ASL

B. Maintain waste transfer records (Formulario di Identificazione Rifiuti – FIR) for all transported waste;

retain for 5 years.

C. Maximum re-use of demolition materials on site (recycled aggregate for sub-base, fill) where quality permits; document in waste management plan.

3.5 COMPLETION AND SITE CLEARANCE

A. Remove all temporary shoring only after permanent structure can carry loads (written Engineer instruction).

B. Clear site of all demolition debris; wash down hardstanding with water; clean drainage gullies.

C. Survey retained structures for new damage; repair any damage attributable to demolition operations.

D. Submit waste disposal records to Engineer before final payment.

END OF SECTION 024116

SANITARY, SEWER, AND HVAC CONDENSATE DRAINAGE PIPING SECTION 221316

FAC ENGINEERING ROME 221316 – 1 May 23, 2026 | Rev. 0

SECTION 221316

SANITARY, SEWER, AND HVAC CONDENSATE DRAINAGE PIPING

FAC ENGINEERING ROME 221316 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 232113 – Hydronic Piping (water piping; NOT drainage)

2. Section 232116 – Hydronic Specialties (backflow preventer at fill connection)

3. Section 237300 – Air Handling Units (AHU condensate drain pan and outlet)

4. Section 238216 – Fan-Coil Units (FCU drain pan, condensate lift pump, drain outlet)

5. Section 238143 – Air-Source Heat Pumps (defrost water and condensate discharge)

6. Section 233113 – Metal Ducts (duct moisture drainage where applicable)

7. Section 230716 – HVAC Thermal Insulation (condensate drain insulation against sweating)

1.2 SUMMARY

A. Scope: Furnish and install all gravity drainage piping for the project, comprising:

1. Sanitary waste and vent piping serving plumbing fixtures (WCs, basins, sinks, urinals, floor drains)

2. Building drainage discharge from inside the building envelope to the external sewer connection

3. Site sewer extension from building envelope to public sewer or on-site treatment

4. HVAC condensate drainage from fan-coil units, air-handling units, heat-pump indoor sections, dehumidifiers, and humidifier blowdown

5. Defrost / drip-pan drainage from outdoor heat-pump units

6. Storm/rainwater drainage where indicated on architectural drawings

7. Cleanouts, traps, vents, and inspection access provisions

B. Design code precedence: International Plumbing Code (ICC IPC 2021) is the primary design reference for sizing, slope, materials, and termination of all drainage piping and HVAC condensate disposal (per Engineer's directive). Italian / European standards (UNI EN 12056 series, UNI EN 752, D.Lgs. 152/2006) apply concurrently; where conflict arises, the more stringent requirement governs.

1.3 DEFINITIONS

A. Sanitary drainage: piping system removing wastewater from plumbing fixtures (greywater + blackwater) to the building sewer connection.

B. Building drain: the lowest piping inside the building envelope that receives discharge from soil, waste, and other drainage pipes and conveys it to the building sewer.

C. Building sewer: the piping extending from the end of the building drain to the public sewer, septic tank, or other approved disposal point.

D. HVAC condensate: water condensed from atmospheric moisture on cooling coils (FCU, AHU, heat pump), or produced during defrost cycles; pH typically 6.5–8 but may be slightly acidic on some materials.

E. Indirect waste pipe: waste pipe that does not connect directly to the sanitary drainage system, but discharges through an air gap into a fixture, receptor, or interceptor that is so connected — per ICC IPC Chapter 8. HVAC condensate is classified as indirect waste and shall discharge through an air gap.

F. Air gap: unobstructed vertical distance, through the free atmosphere, between the lowest opening of any pipe supplying water or waste to a receptor and the flood-level rim of that receptor; minimum 25 mm or twice the effective pipe diameter, whichever is greater (ICC IPC 802.2).

G. Trap: fitting providing a liquid seal that prevents back-passage of air and odours without materially affecting flow.

H. Trap seal depth: vertical distance between the dip and the crown weir of the trap; minimum 50 mm, maximum 100 mm (ICC IPC 1002.4 / UNI EN 12056-2).

I. Cleanout: access opening in a drainage piping system used for clearing obstructions.

FAC ENGINEERING ROME 221316 – 3 May 23, 2026 | Rev. 0

ICC IPC 2021 International Plumbing Code – Chapter 3 (General Regulations), Chapter 7 (Sanitary Drainage), Chapter 8 (Indirect/Special Waste), and Section 314 (Condensate Disposal)

ICC IPC Section 314 Condensate Disposal – HVAC equipment condensate piping size, materials, slope, and termination

ICC IPC Section 314.2.3 Condensate drain pipe minimum size based on coil capacity (≤ 20 ton: DN 20;

21–40 ton: DN 25; 41–90 ton: DN 32; 91–125 ton: DN 40; 126–250 ton: DN 50)

UNI EN 12056-1 Gravity drainage systems inside buildings – general and performance requirements

UNI EN 12056-2 Gravity drainage systems inside buildings – sanitary pipework, layout and calculation

UNI EN 12056-3 Gravity drainage systems inside buildings – roof drainage, layout and calculation

UNI EN 12056-5 Gravity drainage systems inside buildings – installation and testing

UNI EN 752 Drain and sewer systems outside buildings – sewer system management

UNI EN 1610 Construction and testing of drains and sewers (trench backfill, joint testing)

UNI EN 877 Cast iron pipes and fittings for sanitary drainage (SML-type)

UNI EN 1329-1 PVC-U piping systems for soil and waste discharge inside building

UNI EN 1451-1 Polypropylene (PP) piping systems for soil and waste

UNI EN 1453-1 Structured-wall PVC-U pipes for soil and waste discharge

UNI EN 12200 PVC-U rainwater piping systems

UNI 9183 Sistemi di scarico delle acque usate – design criteria

D.Lgs. 152/2006 Environmental Code – Part III (water protection, discharge of treated wastewater)

D.M. 37/2008 Building systems – installer qualifications (plumbing systems)

Reg. (UE) 305/2011 (CPR) Construction Products Regulation – CE marking for piping products

D.M. 37/2008 Building systems – installer qualifications and requirements

D.Lgs. 192/2005 e s.m.i. Energy performance of buildings

D.Lgs. 81/2008 Consolidated Workplace Safety Act

1.5 SUBMITTALS

A. Drainage layout drawings: plans and isometrics showing all drainage piping; sizes, slopes, cleanouts, vents, traps, and termination points; coordinated with structural and architectural drawings.

B. Sizing calculations: drainage fixture unit (DFU) calculations per ICC IPC Chapter 7 (Tables 709.1, 710.1) and concurrent verification per UNI EN 12056-2 for all building drains; condensate-line sizing per ICC IPC 314.2.3 based on cooling-equipment tonnage.

C. Product data: pipe and fitting manufacturers' data sheets; CE marking and Declaration of Performance per CPR; material standard compliance (EN 877 / EN 1329 / EN 1451 / EN 1453 / EN 12200).

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D. Hydrostatic test plan: plan for water/air testing per ICC IPC 312 and UNI EN 1610.

E. Condensate route drawing: drawing showing the route of every HVAC equipment condensate line from drain pan outlet, through trap, to indirect-waste termination; trap geometry detail.

1.6 QUALITY ASSURANCE

A. Installer: licensed plumbing contractor per D.M. 37/2008 (impianti idrici e sanitari, lett. d); minimum 5 years' experience on comparable projects.

B. Pipe and fittings: CE marked per CPR (Reg. UE 305/2011); DoP submitted at procurement.

C. Codes governing installation: ICC IPC 2021 is the primary installation code for this project. UNI EN

12056 (inside buildings) and UNI EN 752 (outside buildings) apply concurrently. D.Lgs. 152/2006 governs the quality of any wastewater discharged off-site.

D. No cross-connection between potable water and drainage; backflow protection per Section 232116;

air-gap separation per ICC IPC 802.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver pipes and fittings in manufacturer's original packaging; protect ends with caps.

B. Store horizontally on level supports; protect from UV (PVC/PP); do not stack above manufacturer's limit.

C. Inspect on delivery for damage, ovalisation, or fitting deformation; reject non-conforming items.

1.8 WARRANTY

A. All drainage piping and fittings: 5 years from Substantial Completion.

B. HVAC condensate lift pumps: 1 year.

PART 2 – PRODUCTS

2.1 PIPE MATERIALS — INSIDE BUILDING

A. Cast iron (SML — soil, manhole, lead-free) per EN 877: preferred for vertical stacks in multi-storey buildings and where acoustic performance is required; centrifugal cast or sand cast; with EPDM gaskets and stainless-steel clamps; ≥ 1.5 mm internal epoxy lining for chemical resistance.

1. Diameter range: DN 50 – DN 300

2. Use: vertical waste/soil stacks in occupied buildings (sound absorption), and any application where higher fire performance (A1 non-combustible per EN 13501-1) is required B. Polypropylene (PP) per EN 1451-1: standard for in-building waste and vent piping where acoustic performance is not the principal criterion; mineral-reinforced PP for sound-attenuating ranges; socket fittings with integrated EPDM lip seal.

1. Diameter range: DN 32 – DN 160

2. Temperature: continuous 90 °C, short-burst 95 °C — suitable for kitchen and dishwasher waste

3. Fire class: B-s1,d0 minimum per EN 13501-1; A2-s1,d0 for sound-rated/fire-rated branches

C. PVC-U per EN 1329-1: acceptable for non-acoustic in-building waste piping, condensate lines, and laboratory waste; socket joints with elastomeric seal or solvent cement; do not use above 60 °C.

1. Diameter range: DN 32 – DN 160

2. Fire class: B-s1,d0 minimum; not used where A2 required

D. Copper per EN 1057 (for condensate only, optional): half-hard tube acceptable for short condensate runs where corrosion resistance and small bore are advantageous (e.g., from FCU drain pan to nearest trap).

2.2 PIPE MATERIALS — OUTSIDE BUILDING (BURIED)

A. Vitrified clay per EN 295: preferred for buried gravity sewer in commercial projects; sulphate-resistant;

long life; lockable spigot-socket joints with elastomeric seal.

B. Structured-wall PVC-U per EN 1453-1 or HDPE per EN 12666-1: acceptable for buried sewer lines;

minimum SN 8 ring stiffness (or as required by burial depth and traffic load); EN 1610 installation.

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C. Reinforced concrete pipe per EN 1916: for large-diameter (DN ≥ 400) buried sewer lines or where traffic loading and durability so require.

D. Cast iron per EN 877 (buried): acceptable for buried sections immediately exiting the building, transitioning to alternative material at the first inspection chamber.

2.3 HVAC CONDENSATE DRAIN PIPING — DEDICATED

A. Code reference: ICC IPC Section 314 (Condensate Disposal). All HVAC condensate piping shall conform to IPC 314 sizing, slope, material, and termination requirements.

B. Material — preferred: PVC-U per EN 1329-1 (Schedule 40 or equivalent wall) or polypropylene (PP) per EN 1451-1; copper EN 1057 acceptable; galvanised steel is NOT recommended for condensate (mild acidity attacks zinc coating).

C. Minimum size per ICC IPC 314.2.3 (based on cooling-equipment nominal capacity, USRT = US refrigeration tons; 1 USRT = 3.517 kW):

1. Equipment ≤ 20 USRT (≤ 70 kW): minimum DN 20 (¾")

2. Equipment 21–40 USRT (74–141 kW): minimum DN 25 (1")

3. Equipment 41–90 USRT (144–317 kW): minimum DN 32 (1¼")

4. Equipment 91–125 USRT (320–440 kW): minimum DN 40 (1½")

5. Equipment 126–250 USRT (443–880 kW): minimum DN 50 (2")

D. Minimum slope: 1% (10 mm per metre) toward indirect-waste termination per ICC IPC 314.2.2; never level or back-slope.

E. Trap geometry — mandatory: P-trap or U-trap at each drain-pan outlet, with trap depth (water seal) at least equal to the negative static pressure (mm w.g.) the fan develops downstream of the cooling coil + 25 mm safety margin; this prevents the fan suction from holding water in the pan (drain-pan flooding) on draw-through AHU configurations. No exception — every drain-pan outlet has its own trap.

F. Vent (where required by IPC 314.2.5): open vent (air-admittance valve or open pipe to atmosphere) upstream of the trap where condensate-line static head could break the trap seal.

G. Termination — indirect waste per ICC IPC 802: condensate pipe shall terminate at an air gap above a tundish, floor drain, mop-sink, hub drain, or approved indirect-waste receptor. Direct connection to sanitary drainage is NOT permitted.

H. Insulation: all condensate lines passing through occupied spaces shall be insulated against surface condensation (sweating) per Section 230716 — minimum 13 mm FEF closed-cell elastomeric foam, vapour-tight at all joints.

I. Cleanout / rod-out access: provide cleanout tee at the start of each horizontal condensate run, at every change of direction > 45°, and at maximum 15 m intervals; cleanout caps accessible without dismantling adjacent insulation.

2.4 CONDENSATE LIFT PUMPS (WHERE GRAVITY DRAINAGE IS NOT FEASIBLE)

A. Application per ICC IPC 314.2.4: where the drain-pan outlet elevation does not permit gravity flow to an indirect-waste receptor with the minimum 1% slope, install a condensate lift pump.

B. Type: factory-assembled lift pump unit comprising tank (≥ 0.5 L), float switch, centrifugal or peristaltic pump (≥ 6 L/h at 3 m discharge head), check valve, high-water alarm contacts.

C. Materials: ABS or polycarbonate tank; PP impeller; FKM seal compatible with mild-acid condensate;

brass or stainless discharge connection.

D. Electrical: 230 VAC 50 Hz fused supply; volt-free high-water alarm contact wired to BMS via Section

230900; pump fault contact wired to BMS.

E. Safety interlock: high-water level shall interrupt the cooling-coil control loop (close chilled water valve or stop heat-pump compressor) preventing further condensate generation until alarm clears. Wire interlock through Section 230900 DDC.

F. Discharge pipe: soft copper or flexible PE tube; minimum DN 8 (5/16"); rises vertically to maximum 3 m, then to gravity drain with continuous slope; terminate at indirect waste per Article 2.3.

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2.5 TRAPS, CLEANOUTS, AND VENTS

A. Traps: every plumbing fixture and floor drain provided with a P-trap (preferred), S-trap or bottle trap as appropriate; trap seal depth 50–100 mm; trap material to match upstream piping.

B. Cleanouts (ICC IPC 708):

1. Every horizontal branch ≥ DN 75: cleanout at upstream terminus

2. Every change of direction > 45°

3. Maximum 30 m intervals on straight runs ≤ DN 150; 22.5 m for DN > 150 (ICC IPC 708.1.5)

4. Every base of soil/waste stack

5. At entrance of building drain to building (within 1.5 m of the wall penetration)

C. Vents (ICC IPC Chapter 9): size and arrange vent piping to limit pressure deviation in any plumbing fixture trap to ±25 mm water column; main vent through-roof termination minimum DN 75; cap with rodent screen.

D. Air-admittance valves (AAV): acceptable per ICC IPC 917 where through-roof venting is impractical (e.g., island fixtures, retrofit); approved AAV per ASSE 1051; do not use as substitute for primary system vent.

2.6 FLOOR DRAINS AND TUNDISHES

A. Floor drains: stainless steel AISI 304 body and grating (AISI 316 in coastal/swimming-pool areas); load class K3 (300 kN) per EN 1253-1 for plant rooms; integral P-trap with self-priming feature where exposed to evaporation.

B. Trap primer: install trap primer line on floor drains in mechanical rooms and other areas subject to evaporation; supply from potable water with backflow preventer.

C. Tundishes / hub drains for HVAC condensate termination: stainless steel or PP-with-elastomeric-seal tundish with visible air gap, sized for combined condensate and safety-valve discharge flows.

2.7 SUMPS AND LIFT STATIONS (WHERE REQUIRED)

A. Sewage ejector / lift station: factory-packaged duplex pump unit in cast-iron or HDPE chamber;

alternate-duty pumps; high-water alarm; vent to atmosphere; per ICC IPC Section 712.

B. Storm-water sump pump (where applicable): submersible pumps with float control; discharge to building storm-water system; do not connect storm sump discharge to sanitary system.

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify structural openings, sleeves, and penetrations are correctly positioned and sized for drainage piping; report discrepancies before commencing installation.

B. Confirm location of building sewer connection, invert level, and minimum cover with site survey before commencing buried drainage works.

C. Verify condensate drain elevation at each HVAC equipment outlet permits gravity drainage with required slope; identify locations requiring lift pumps before equipment installation.

3.2 INSTALLATION — IN-BUILDING DRAINAGE

A. Install all drainage piping per ICC IPC Chapter 7 and UNI EN 12056-5; coordinate with structural and architectural penetrations.

B. Slope (ICC IPC 704.1):

1. Building drain and horizontal branches DN ≤ 80: minimum 2% (20 mm/m)

2. Building drain DN 90 – DN 150: minimum 1% (10 mm/m)

3. Building drain DN > 150: minimum 0.8% per ICC IPC Table 704.1; verify per local authority

4. Condensate drain: minimum 1% per ICC IPC 314.2.2

C. Joints: elastomeric-seal socket joints (preferred); solvent-cemented joints for PVC-U where elevated temperatures and chemical content allow; mechanical clamp couplings for cast iron (EN 877); never mix jointing methods within a single run.

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D. Hangers and supports: size and space per Section 230529 and manufacturer's data; cast-iron DN 100: maximum 2.0 m horizontal spacing; PVC-U DN 100: maximum 1.0 m horizontal spacing; sound-attenuating clamps required on vertical stacks within occupied spaces.

E. Penetrations: sleeve all drainage pipes through walls, floors, and slabs; fire-stop per Section 078413 at fire-rated barriers; acoustic seal at acoustic-rated barriers; flexible coupling at structural movement joints.

F. Cleanouts (ICC IPC 708): install at all locations specified in Article 2.5; orient access cap toward unobstructed working space; cap with brass plug; thread-lock not permitted.

G. Vent piping: rise to roof penetration at minimum 1:50 slope; terminate not less than 150 mm above roof line and not less than 3 m horizontally from openable windows / air intakes (ICC IPC 904).

3.3 INSTALLATION — HVAC CONDENSATE DRAIN

A. Connect to drain-pan outlet of each FCU, AHU, heat pump, and dehumidifier per equipment manufacturer's instructions.

B. Trap fabrication: P-trap or U-trap immediately at drain-pan outlet; height of trap seal = fan negative static pressure (mm w.g.) + 25 mm; document trap depth in commissioning record.

C. Slope: continuous 1% minimum (10 mm/m) toward indirect-waste termination; no upward sections in gravity portion.

D. Indirect waste termination (ICC IPC 802): terminate at tundish, floor drain, hub drain, or mop-sink with visible air gap ≥ 2 × pipe diameter (minimum 25 mm). Engineer or Owner shall be able to verify air gap during inspection.

E. Insulation: apply 13 mm FEF closed-cell foam over entire condensate run within insulated/occupied spaces; vapour-tight at all joints; do not leave any portion of cold condensate pipe uninsulated within finished ceiling voids.

F. Cleanouts: at start of run, at every change of direction > 45°, every 15 m on straight runs.

G. No connection of condensate drain to roof gutter, rainwater leader, or sanitary stack without air-gapped intermediate receptor.

3.4 INSTALLATION — BURIED SEWER

A. Install per UNI EN 1610 and ICC IPC Chapter 7; minimum cover 800 mm in landscape, 1000 mm in traffic-loaded areas.

B. Bedding: 150 mm compacted granular fill (sand or 4/8 mm gravel) below pipe; haunching and surround to spring line; selected excavated material as backfill above; warning tape at 300 mm above pipe.

C. Slope: minimum 1% (10 mm/m) for DN ≤ 200; 0.5% acceptable for DN > 200 per local authority.

D. Inspection chambers (manholes): at every change of direction, junction, or invert change, and at maximum 30 m intervals; sizes per UNI EN 476.

E. Connection to public sewer: per local utility authority's approval and connection specification;

coordinate elevation and any required backwater valve.

3.5 TESTING

A. Sanitary drainage water test (ICC IPC 312.2): plug downstream end; fill to overflow at highest point or apply 3 m water column at lowest point; maintain ≥ 15 minutes; no visible leakage permitted.

B. Air test (ICC IPC 312.3): alternative to water test; pressurise system to 35 kPa (5 psi); maintain ≥ 15 minutes; pressure drop ≤ 7 kPa permitted.

C. Buried sewer joint test (UNI EN 1610): water-fill test or air-pressure test per EN 1610; document each manhole-to-manhole section result before backfill closure.

D. Condensate drain test: pour 2 L of clean water into each drain pan; verify free flow to indirect-waste termination without backup or overflow; verify trap holds water seal after fan shutdown.

E. Lift pump test: simulate high-water condition with float manually raised; verify pump operation, discharge, alarm signal to BMS, and cooling-coil interlock shut-off.

F. Submit signed test reports for all drainage works before concealment by ceilings, walls, or backfill.

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3.6 COMMISSIONING

A. Operate each HVAC cooling unit for minimum 1 hour at design conditions; verify continuous condensate flow at indirect-waste termination; verify trap retains water seal; record observations.

B. Verify lift-pump high-water alarm transmits to BMS supervisor; verify cooling-coil shut-off interlock disables cooling on high-water signal.

C. Photographically document each air-gap termination for the project record.

3.7 IDENTIFICATION

A. Label all drainage piping per Section 230553:

1. Sanitary waste: brown

2. Storm/rainwater: blue with white stripe

3. HVAC condensate: blue (cold-water family) with 'CONDENSATE' text label every 5 m and at each change of direction B. Tag lift pumps, sumps, and main cleanouts with stainless tag showing function and reference number.

END OF SECTION 221316

HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT SECTION 230529

FAC ENGINEERING ROME 230529 – 1 May 23, 2026 | Rev. 0

SECTION 230529

HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT

FAC ENGINEERING ROME 230529 – 2 May 23, 2026 | Rev. 0

PART 1 – GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract apply to this Section.

B. Related Sections:

1. Section 232113 – Hydronic Piping

2. Section 232116 – Hydronic Specialties

3. Section 233113 – Metal Ducts

4. Section 237300 – Air Handling Units

5. Section 238216 – Fan Coil Units

6. Section 232123 – Hydronic Pumps

7. Section 230716 – HVAC Thermal Insulation

8. Section 230553 – Identification for HVAC Systems

1.2 SUMMARY

A. Scope: Furnish and install all hangers, supports, anchors, guides, seismic braces, and associated hardware for HVAC piping, ductwork, and mechanical equipment.

B. Included work:

1. Pipe hangers and rods for all hydronic piping systems (heating, cooling, condenser water, glycol)

2. Duct hangers, trapeze frames, and lateral braces for rectangular and circular sheet metal ducts

3. Equipment support bases, inertia pads, and anti-vibration mounts for AHUs, pumps, and fans

4. Seismic restraints and lateral bracing per NTC 2018 for all piping ≥ DN 65 and ducts with longest side ≥ 600 mm

5. Pipe anchors, guides, and expansion loops to control thermal movement

6. Insulation protection saddles and shields at all support points on insulated piping

1.3 DEFINITIONS

A. Hanger: support that suspends pipe or duct from overhead structure by means of rods, straps, or chains; carries load in tension.

B. Support: structure that bears pipe or equipment weight from below; carries load in compression;

includes floor stands, base plates, and structural frames.

C. Anchor: rigid restraint that prevents pipe movement in all directions; absorbs thermal expansion forces;

located at fixed points in expansion loop design.

D. Guide: restraint that allows axial pipe movement but prevents lateral/vertical movement; directs thermal expansion toward expansion loops or flexible joints.

E. Trapeze: horizontal structural member (angle or channel section) spanning between two hanger rods;

supports multiple parallel pipes or a wide duct.

F. Seismic brace: lateral restraint system (rod, angle, or sway brace) designed to resist inertial forces from seismic events; required by NTC 2018 §7.2.3.

G. Insulation protection saddle (sella): curved steel plate between pipe support and insulation; prevents crushing of insulation at support points; mandatory on insulated pipes.

H. MSS SP-58 type number: industry-standard catalogue designation for hanger and support components; referenced throughout this Section.

MSS SP-58…