PN 636-26-306 HVAC Bldg 6 and 8 SOW - 8 pages.pdf

Statement of Work

Project Number: 636-26-306 Replace HVAC System in Building 6 & Building 8

Department of Veterans Affairs Nebraska Western Iowa Health Care System (VANWIHCS)

Omaha Veterans Affairs Medical Center (VAMC)

Nebraska-Western Iowa Health Care System

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A. SCOPE OF WORK

The VA Nebraska-Western Iowa Medical Health Care System, Omaha VA Medical Center, needs to replace the existing HVAC R-410A split system in building 6 with a new R-410A system and in building 8 replace the HVAC unit with a new R-454B system, to meet A2L requirements. Additionally, a new mini-split system will be installed in the basement of building 6 to provide cooling in the mechanical room.

For Building 6, this project will require the Contractor to demo the existing Air-Cooled Condensing Unit (ACCU) and disassemble AHU to remove coil. Recover and dispose of refrigerant per EPA regulations.

Install a new Dual-Circuit Air-Cooled Condensing Unit meeting or exceeding:

• Daikin Applied Model RCS020D Dual-Circuit Air-Cooled Condensing Unit.

o 208/60/3, R-410A refrigerant, Dual Circuit, Scroll compressors, 2-steps capacity control. Evaporator Coil. Low ambient operation to 45 degrees F, Factory installed thru-the-door disconnect switch, condenser has slanted coils for hail protection, factory installed vandal guard, Liquid Line Refrigeration Specialties consisting of TXV’s, Sight Glasses, Filter Driers & Solenoids, hot gas bypass accessories including solenoids, spring isolation kit, 1-year unit parts and extended 4-year compressor parts only warranties

Install new Evaporator Coil meeting or exceeding:

• Daikin Applied Dual Circuit Evaporator Coil complete with the following:

o Dual-Circuit Coil to fit existing McQuay AHU for R-410A refrigerant, aluminum fins, copper tubes, 1-year warranty.

Reassemble AHU, furnish and install new insulated copper line sets, charge the system with R-410A refrigerant, pull vacuum and leak test they system.

Contractor shall supply and install a 3-ton mini-split wall mounted unit with inverter-driven technology in basement mechanical room in building 6. Ensure the unit meets the capacity requirement of turning down to 20% or more for part load conditions. Install the indoor wall-mounted unit and corresponding outdoor unit, ensuring all connections are made accurately and securely. Install new line sets, electrical wiring, and necessary components to ensure proper function of the unit according to manufacture recommendations. Ensure the unit is installed in an optimal location within the mechanical space for maximum efficiency and coverage. Coordinate with the COR on mounting locations for the indoor unit and mount in accordance with the manufacture recommendations.

Coordinate with the COR on a suitable location to mount the outdoor unit, either on a suitable base or wall bracket. Connect electrical to existing Panel MB in the mechanical room. Install new copper refrigerant piping with brazed connections, fill and test the system.

For Building 8, demo the existing AHU and condenser unit. Isolate and drain the water, steam, and condensate from the equipment and piping. Recover and dispose of refrigerant per EPA regulations.

Install a new Air Handling Unit meeting or exceeding:

• Daikin Applied Vision o Double wall construction, Flat Filter with 2” Pleated MERV 8 Filters, 5HP, ODP, Premium Efficiency, 460/60/3, Multizone Diffuser/section, DX Coil Section with 2-circuit R-454B DX Coil, Refrigerant Detection System, Stainless Steel Drip Pan. The AHU includes Cabinetry, Steam Coil & Multizone Dampers (3-sections, Dampers are 1-piece). Minimum 5,000 CFM Standard 1-Year warranty.

Install a new 12.5 Ton Dual-Circuit Air-Cooled Condensing Unit meeting or exceeding:

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• Lennox 12.5 Ton Dual-Circuit Air-Cooled Condensing Unit 460/60/3, R-454B Dual Circuit, Two Scroll compressors, 3-stage, Low ambient operation to 45 degrees F, field powered GFI, high- and low-pressure switches, hail guard, Liquid Line Refrigeration Specialties consisting of TXV’s, Sight Glasses, Filter Driers & Solenoids 1-year unit parts and extended 4-year compressor parts only warranties.

Furnish and install new insulated copper line sets, install new steam actuator, install new zone actuator. Modify ducting, steam and condensate piping and condensate drain to accommodate new equipment. Charge the system with R-454B refrigerant, pull vacuum and leak test the system.

Verify that the building automation system interfaces correctly and is tied into the newly installed equipment for remote view and control of the associated components in this scope. For newly installed evaporator coils install proper primary and secondary drain pans as required by the manufacturer with appropriate traps and float switches to prevent water damage. Contractor shall verify the new evaporator coil matches the condenser capacity and the existing air handler's airflow.

Contractor shall inspect the mixing dampers and separation between the hot and cold decks to prevent unintended air leakage between zones as both systems for building 6 and building 8 have hot deck/cold deck configuration.

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B. CURRENT CONDITIONS.

Current split systems serving Building 6:

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Current split systems serving Building 8:

C. SERVICES

The Contractor shall provide construction services as stated in the Scope of Work above and shall include but not limited to the following:

1. Preconstruction Risk Assessment / Infection Control Risk Assessment.

a. Contractor shall control all construction-associated hazards that affect VA medical facilities, their occupants, services and mission-essential functions and capabilities are critical in all medical center facilities.

b. Contractor shall ensure interior construction activities causing disturbance of existing dust, or creating new dust, must be conducted within ventilation-controlled areas that minimize the flow of airborne particles into patient areas.

c. Contractor shall ensure compliance VHA 7715 and post a copy of the latest PCRA and ICRA forms at all jobs sites.

d. VHA-PCRAs and ICRAs will be re-validated and updated as needed based on but not limited to changes from affected individuals, areas/locations, scope, contractor means and methods, safety requirements, phasing, contractor competencies and capabilities.

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e. The COR with concurrence from a VHA infection control specialist, VHA patient safety and VHA occupational health and safety officer will have ultimate decision on activity type and the level of precautions the contract needs to take.

2. Prepare a detailed work plan, including timelines and safety procedures to be provided to the COR prior to work.

3. Coordinate with the COR on safely shutting down the existing HVAC system.

4. Recover any remaining refrigerant from the system following EPA regulations and guidelines.

5. Disconnect and lock out tag out the electrical power supply to the air handler and condenser units.

6. Clean the existing ductwork in accordance with the National Air Duct Cleaners Association

(NADCA) Standards. Repair or replace any damaged sections caused during construction.

7. Install the new outdoor condenser units on existing base or pad, ensuring they are level and secure.

8. Test the system to ensure it is operating correctly and efficiently in accordance with The

American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) standards. Measure the airflow, refrigerant pressure, and temperature differential to confirm it meets manufacturer specifications. Calibrate the thermostat as necessary.

9. Ensure the new system is connected to the Building Automation System (BAS) with similar graphics and controls as existing units.

10. Conduct a final walk-through inspection with the VA POC and client to ensure all work has been completed to satisfaction.

11. Ensure all installation debris is disposed of in accordance with local, state, and federal regulations to maintain a clean and compliant job site.

12. Provide VA with all relevant documentation, including user manuals, warranty information, and maintenance recommendations.

13. The contractor shall conduct comprehensive training for VA personnel on the new HVAC systems, covering safe handling, operation, routine and preventative maintenance, and performance optimization.

D. OBJECTIVES AND TECHNICAL REQUIREMENTS.

The objectives of this project is to replace the components of the HVAC system described above to meet requirements.

1. System Efficiency and Reliability:

a. HVAC systems should achieve a minimum efficiency rating as specified by the manufacturer.

b. HVAC systems should operate with a minimum uptime of 99%.

c. Maintain indoor temperature within the specified range of 68-76°F.

2. All work shall comply with the most recent edition of USACE EM 385-1-1, comply with 29 CFR 1926, comply with 29 CFR 1910 as incorporated by reference within 29 CFR 1926, comply with ASSP A10.34, and all applicable federal, state, and local laws, ordinances, criteria, rules and regulations. Submit matters of interpretation of standards for resolution before starting work. Where the requirements of this specification, applicable laws, criteria, ordinances, regulations, and referenced documents vary, the most stringent requirements govern except with specific approval and acceptance.

3. All electrical work shall comply with VHA Directive 1028, NFPA 70 (NEC), NFPA 70B, NFPA 70E, 29 CFR Part 1910 Subpart J – General Environmental Controls, 29 CFR Part 1910 Subpart S – Electrical, and 29 CFR 1926 Subpart K.

4. All installation, maintenance, and servicing of equipment or machinery shall comply with 29 CFR 1910.147 except for specifically referenced operations in 29 CFR 1926

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5. All hot work shall be safeguarded in accordance with NFPA 241 and NFPA 51B. Hot work permits shall be issued daily for work in accordance with local policy.

6. All confined space entry shall comply with 29 CFR 1926, Subpart AA except for specifically referenced operations in 29 CFR 1926.

7. All floor and wall openings shall comply with 29 CFR 1926 Subpart M and EM 385-1-1.

8. All crane work shall comply with 29 CFR 1926 Subpart CC and EM 385-1-1. Crane lift plans shall be submitted to the COR 14 days prior to lift.

9. The fall protection (FP) threshold height requirement is 4ft for ALL WORK in government occupied sites, unless the OSHA 29 CFR 1926 or EM 385-1-1 requirements are more stringent. All work at or above this threshold shall meet OSHA or EM 385-1-1 whichever is more stringent.

10. Contractor shall maintain free and unobstructed access to facility emergency services and for fire, police and other emergency response forces in accordance with NFPA 241

11. Contractor shall follow OSHA standard 1926.405(a)(2)(i) when applicable which states temporary wiring shall be removed immediately upon completion of construction or the purpose for which the wiring was installed.

E. PROJECT SCHEDULE/PERIOD OF PERFORMANCE

1. The contract Period of Performance for the construction shall be 120 calendar days from a formal Notice to Proceed.

2. The Contractor shall schedule a kickoff meeting no later than 2 business days following notice to proceed. At a minimum the local site COR and the Contracting Officer shall attend. The Contractor will also be responsible for attending meetings. The contractor shall provide an agenda in preparation of the meeting. The contractor shall take meeting minutes and shall email these notes to all parties included in the meeting invite. At a minimum the contractor shall provide the general contractor contact information that can be reached 24/7 as well as subcontractors, and any required onsite coordination for inspection, testing or deliveries during the duration of the period of performance, any hazards expected, preconstruction risk assessments where applicable and infection control risk assessments where applicable. At the discretion of the contracting officer (CO) in accordance with RFO 42.503-1 the action of establishing a time and place of the conference, agenda and summary may be delegated or taken on by the contracting officer whom awarded such contract.

3. The Contractor shall limit all patient or staff impacts during construction. Normal business hours are 0730-1600. Should services provided not impact patient or staff services work can be performed during normal business hours. It is expected that blg 6 work be after hours, and blg 8 be performed during business hours. Questions on local facility impacts and work proposed by the contractor shall be directed to the contracting officer representative and approval of work to be performed during or after hours will come from the contracting officer. Contractor shall be mindful of the period of performance when scheduling work load.

F. REQUIREMENTS

It is required that all contractors meet the following qualifications. They shall be submitted to the VA for review and approval prior to work.

1. General contractor shall provide one OSHA “Competent Person” (CP) to be physically present at all job sites. This individual shall be directly employed by the general contractor with authority to speak on behalf of the general contractor. This individual shall be capable of identifying existing and predictable hazards in the surroundings and working conditions which are unsanitary, hazardous or dangerous to employees, and who has the

8 | P a g e authorization to take prompt corrective measures to eliminate them (see 29 CFR 1926.32(f)). The prime contractor(s) are responsible for informing their subcontractors of the safety provisions under the terms of the contract and the penalties for noncompliance, coordinating the work to prevent one craft from interfering with or creating hazardous working conditions for other crafts, and inspecting subcontractor operations to ensure that Mishap prevention responsibilities are being carried out. This individual shall have a current OSHA 30 certification and provide no less than 3 years worth of job related experience similar to that being asked in this contract. All contractors shall have a current OSHA 10 certification.

2. A Qualified Person as defined in NFPA 70, Article 100 have demonstrated skills and knowledge related to the construction and operation of electrical equipment and installations and received safety training to identify the hazards and reduce the associated risk. Training must be classroom, on-the-job or a combination of the two. The type and extent of training must be proportionate to the risk to the employee. The general contractor shall provide qualified persons that are licensed journeyman or master electricians. Licensure of each qualified person shall be provided as well as training certifications.

3. HVAC technicians shall provide evidence of having met the qualifications of a Qualified

Person as stated above. Technicians shall provide EPA 608 technician certification.

Technicians shall provide training certifications for the equipment involving servicing or shall provide NATE certification in its place.

G. Warranty

The Contractor shall provide the VA with the warranty as stated in the scope of work above.

The Contractor shall conduct a warranty review six (6) months and eleven (11) months following the completion of construction. A report detailing the findings of each review shall be submitted to the VA.

H. Locations

1. Construction Omaha VA Medical Center

Building 6 and Building 8 4101 Woolworth Ave Omaha, NE 68105

I. Standards/Codes/Requirements/Regulations

Meet all applicable and current federal and state codes/requirements, including but not limited to:

OSHA Occupational Safety and Health Administration EPA Environmental Protection Agency NFPA 101 Life Safety Code ASHRAE American Society of Heating, Refrigerating, and Air-Conditioning Engineers TJC The Joint Commission AHERA Asbestos Hazard Emergency Response Act NESHAPS National Emission Standards for Hazardous Air Pollutants NFPA Applicable codes published by the National Fire Protection Association ASTM ASTM International (formerly the American Society for Testing and

Materials UFAS Uniform Federal Accessibility Standards