Attachment_No__01_-_Project_Specifications.pdf

SCOPE OF WORK

Project Title: RORI VC HVAC Replacement, Repair, and Maintenance Location: Rosie the Riveter/WWII Home Front National Historical Park Date: 8/10/2026

1.0 PURPOSE

The National Park Service (NPS) requires HVAC replacement, repair, cleaning, and maintenance services for four existing HVAC systems at Rosie the Riveter/WWII Home Front National Historical Park.

The work consists of:

• Complete replacement of Systems 1 and 2 with new Daikin inverter-driven heat-pump systems (or approved equal).

• Targeted repair and maintenance of System 3, including cleaning, control-board replacement, and line-set protection.

• Targeted cleaning and maintenance of System 4, including indoor and outdoor coil/blower cleaning and line-set protection.

The Contractor shall furnish all labor, supervision, equipment, materials, tools, transportation, disposal, testing, commissioning, and services necessary to complete the work described herein.

2.0 GENERAL REQUIREMENTS

The Contractor shall:

1. Coordinate equipment delivery, site access, work sequencing, and required shutdowns with the NPS Contracting Officer and/or designated park representative.

2. Protect existing buildings, finishes, furnishings, equipment, information technology equipment, and surrounding work areas from damage, dust, debris, water, and other construction impacts.

3. Maintain safe and orderly work areas throughout the project.

4. Provide all required labor, tools, equipment, materials, lifts, transportation, and items necessary to complete the work.

5. Properly recover, handle, transport, and dispose of refrigerants and removed HVAC equipment in accordance with applicable federal, state, and local requirements.

6. Remove all project-related debris from the site and leave work areas clean and ready for occupancy.

7. Coordinate all required equipment shutdowns with NPS personnel to minimize disruption to park operations.

8. Perform all work in accordance with applicable codes, manufacturer's requirements, and accepted HVAC industry practices.

3.0 SYSTEMS 1 AND 2 – COMPLETE HVAC REPLACEMENT

3.1 Existing Conditions

Systems 1 and 2 serve the server room, corner office, break room, and classroom. Existing equipment has experienced substantial deterioration, including advanced corrosion associated with the facility's waterfront environment. Continued repair of the existing equipment is increasingly difficult to justify based on equipment condition, reliability, and serviceability.

The replacement work is intended to restore reliable and independent temperature control while improving system efficiency, serviceability, and long-term reliability.

3.2 System 1 Replacement

Replace the existing System 1 with a new three-zone Daikin inverter-driven heat-pump system (or approved equal) serving:

• Server room

• Corner office

• Break room

3.3 System 2 Replacement

Replace the existing System 2 with a new two-zone Daikin inverter-driven heat-pump system (or approved equal) serving:

• Classroom The new systems shall use R-410A equipment compatible with the existing system configurations.

3.4 System 1 and 2 Scope of Work

The Contractor shall:

1. Decommission, recover refrigerant from, remove, and properly dispose of the existing outdoor and indoor HVAC equipment associated with Systems 1 and 2.

2. Remove existing controllers and condensate pumps associated with the equipment being replaced.

3. Furnish and install the new Daikin equipment (or approved equal) in the existing general locations.

4. Install the specified wired controllers and washable filters.

5. Install new condensate pumps as required for the replacement equipment.

6. Reuse the existing refrigerant piping and branch fittings where suitable for reuse.

7. Inspect existing refrigerant piping and branch fittings for condition and compatibility with the new equipment.

8. Pressure-test the existing refrigerant piping and branch fittings.

9. Evacuate the refrigerant piping and systems in accordance with Daikin requirements.

10. Charge the systems with the required R-410A refrigerant.

11. Connect new indoor units and condensate pumps to the existing condensate drainage system.

12. Install condensate safety devices as required.

13. Reconnect the new HVAC equipment to the existing electrical circuits.

14. Verify electrical connections, system communication, and controls.

15. Start and commission each system in accordance with Daikin (or approved equal) requirements.

16. Verify heating and cooling operation, refrigerant performance, condensate removal, controller operation, system communication, and temperature response.

17. Correct deficiencies identified during startup and commissioning.

18. Review system operation and basic controller functions with designated NPS representatives.

4.0 SERVER ROOM SECONDARY WATER PROTECTION

Because the server-room indoor unit is located directly above sensitive server equipment, the Contractor shall provide additional protection against condensate or other water leakage from the indoor unit.

The Contractor shall:

1. Furnish and install a secondary safety drain pan beneath the server-room high-wall indoor unit.

2. Support the secondary drain pan using appropriate wall-mounted brackets or other approved means.

3. Position the pan between the indoor unit and the servers below to provide additional protection from water reaching the server equipment.

4. Install a Wet Switch within the secondary safety drain pan.

5. Connect the Wet Switch to provide system shutdown upon detection of water.

6. Test the Wet Switch and associated HVAC shutdown function during commissioning.

7. Verify proper operation of the primary condensate drainage system and secondary water protection system.

The secondary drain pan and Wet Switch are intended to provide an additional level of protection against condensate or other water reaching the servers and potentially causing equipment damage, data loss, or interruption of park operations.

5.0 GORILLA COATING – TROPICOAT CORROSION PROTECTION

Due to the facility's immediate proximity to the Bay, HVAC equipment is exposed to salt-laden moisture and airborne contaminants that can accelerate corrosion of HVAC coils and associated components.

The Contractor shall apply Gorilla Coating Tropicoat corrosion protection (or approved equal) to:

• Coils of both new outdoor units; and

• Coils of all five new indoor units.

The coating shall be applied in accordance with the coating manufacturer's requirements and prior to installation where practical.

The purpose of the coating is to provide additional protection to the HVAC coils against the corrosive waterfront environment and support long-term system reliability.

6.0 SYSTEM 3 – REPAIR AND MAINTENANCE

6.1 Existing Conditions

System 3 serves the upstairs office through one wall-mounted indoor unit. This work is a targeted repair and cleaning option. Existing equipment and components not specifically identified for repair or replacement shall remain in service.

6.2 Scope of Work

The Contractor shall:

1. Clean the evaporator coil in the wall-mounted indoor unit.

2. Remove and clean the blower wheel in the wall-mounted indoor unit.

3. Chemically clean the outdoor-unit condenser coil.

4. Replace the outdoor-unit control board.

5. Install protective black E-Flex Guard line-set covering at three locations, up to six feet at each location.

6.3 System 3 Repair Limitations

1. Work is limited to the cleaning, repair, and line-set protection specifically identified above.

2. Existing equipment and components not specifically identified for replacement shall remain in service.

3. This work does not constitute complete system replacement and does not warrant or guarantee the remaining service life of existing components.

7.0 SYSTEM 4 – CLEANING AND MAINTENANCE

7.1 Existing Conditions

System 4 requires targeted cleaning and maintenance to address the identified service needs.

Existing equipment and components shall remain in service.

7.2 Scope of Work

The Contractor shall:

1. Clean the evaporator coils in both indoor units.

2. Clean the blower assemblies in both indoor units.

3. Chemically clean the outdoor-unit condenser coil.

4. Install protective black E-Flex Guard line-set covering at three locations, up to six feet at each location.

7.3 System 4 Repair Limitations

1. Work is limited to the cleaning and line-set protection specifically identified above.

2. Existing equipment and components not specifically identified for work shall remain in service.

3. This work does not constitute complete system replacement and does not warrant or guarantee the remaining service life of existing components.

8.0 STARTUP, TESTING, AND COMMISSIONING

Following completion of the work, the Contractor shall start, test, and verify all four HVAC systems.

For Systems 1 and 2, commissioning shall include, at a minimum:

• Heating operation

• Cooling operation

• Refrigerant performance

• System communication

• Wired controller operation

• Temperature response

• Condensate drainage and removal

• Condensate safety devices

• Server-room Wet Switch operation and system shutdown

• Proper operation of all indoor and outdoor units

For Systems 3 and 4, the Contractor shall verify proper operation following completion of the specified cleaning and repair work.

The Contractor shall correct deficiencies attributable to the work before final completion.

9.0 PERMITS AND INSPECTIONS

1. The Contractor shall obtain all permits required for the HVAC replacement and associated work.

2. The Contractor shall coordinate required inspections with the applicable jurisdiction.

3. The Contractor shall provide copies of required permits, inspection documentation, and final approvals to the NPS.

10.0 WARRANTY

For Systems 1 and 2, the Contractor shall provide:

• Ten (10) years of Daikin limited parts and compressor warranty coverage; and

• Two (2) years of Contractor labor warranty coverage.

Warranty documentation shall be provided to the NPS upon completion of the work.

Warranty coverage for Systems 3 and 4 shall be limited to the manufacturer's or Contractor's applicable warranty for the specific repair or replacement components furnished under this Scope of Work.

11.0 COMPLETION AND CLOSEOUT

Upon completion, the Contractor shall:

1. Remove all tools, equipment, unused materials, and debris from the work areas.

2. Restore affected areas to a clean and orderly condition.

3. Provide warranty information and equipment documentation to the NPS.

4. Provide applicable permit and inspection documentation.

5. Demonstrate operation of the completed Systems 1–4 to designated NPS personnel.

6. Provide basic operating instructions for the new Daikin systems and controllers.

7. Obtain NPS acceptance of the completed work.