REPLACE HVAC SYSTEM COMPONENTS

Statement of Work Replace HVAC System Components Visitor Center – Building 213 Fort San Cristóbal – San Juan National Historic Site 501 Calle Norzagaray San Juan, Puerto Rico 1. Project Title Replace HVAC System Components – Visitor Center (Building 213) 2. Project Location Fort San Cristóbal San Juan National Historic Site Visitor Center – Building 213 3. Background The Visitor Center at Building 213 currently operates multiple aging HVAC condensing units that have experienced declining efficiency and reliability. Due to the coastal marine environment, the existing systems are exposed to salt air corrosion, reducing the service life of equipment. This project replaces the existing condensing units and associated system components with high- efficiency, corrosion-resistant HVAC equipment meeting modern industry standards. The new systems will improve energy efficiency, reliability, and climate control, ensuring continued operation of the visitor facility. -- 1 of 7 -- 4. Scope of Work The Contractor shall provide all labor, materials, equipment, supervision, and services necessary to remove existing HVAC equipment and install new high-efficiency HVAC systems at the Visitor Center (Building 213). All work shall comply with manufacturer specifications, industry standards, and applicable Federal, State, and local codes. The Contractor shall provide an on-site superintendent or foreman present at all times during active work. 5. Existing Condensing Units to be Replaced Location Tonnage Manufacturer Model Number Location 1 5 Ton Trane 4TTR6060E1000NA Location 2 5 Ton Trane 4TTR6061C1000AA Location 3 5 Ton Trane 4TTV0048A1000CD Location 4 5 Ton Gree FLEE60AC230V1A0 Location 5 5 Ton Gree FLEXX60AC230V1A0 Location 6 4 Ton Trane 3048E1000PB Location 7 4 Ton Trane 3048E1000PB Location 8 4 Ton Trane 4TTR3048E100PB Total units to replace: 8 6. Equipment Requirements All new HVAC equipment shall meet the following requirements: • Units shall be manufactured in the United States. • Minimum SEER rating: 22 or greater. • Electrical system: 208/230 Volt. • Minimum Warranty: -- 2 of 7 -- • 7-Year Compressor Warranty • 5-Year Parts Warranty Corrosion Protection Due to the coastal environment, all exterior condensing units shall include: • Anti-corrosion condenser coil coating • Components rated for saltwater environments • Materials resistant to corrosion 7. Installation Requirements The Contractor shall perform the following installation work: Condensing Units • Install new exterior condensing units at existing locations. • Each unit shall include breaker panel circuit labeling identifying the corresponding condenser unit. • Each unit shall include a disconnect switch located in the immediate vicinity. Disconnect switches shall be: • Non-metallic • NEMA 4X rated enclosure • Mennekes brand or approved equal Refrigerant Piping All existing refrigerant piping shall be removed and replaced. New piping requirements: • New copper tubing shall be ACR Type or Type L copper. • Tubing sizes shall be verified and matched to evaporator and condenser requirements prior to installation. • Suction lines shall include all-weather insulation. • Liquid lines shall be properly sized and field verified. Piping Protection • Refrigerant lines passing through floors or concrete walls shall be installed inside PVC conduit. -- 3 of 7 -- Electrical Work • Remove all existing electrical connections. • Install new wiring from breaker panels to condenser and evaporator units. • All electrical installations shall comply with the National Electrical Code (NEC). Equipment Anchoring Exterior condensing units exposed to open-air environments shall include: • Corrosion-resistant wind anchoring systems • Rooftop unit base pedestals • Stainless steel tie-down hardware Units shall be mounted without roof penetrations under any circumstances. 8. Removal and Disposal The Contractor shall: • Remove all existing condensing units and associated wiring. • Recover all refrigerants in accordance with EPA regulations. • Dispose of equipment and refrigerants in accordance with Federal, State, and local regulations. 9. Coordination The Contractor shall coordinate all work with San Juan National Historic Site (SAJU) staff. Requirements include: • Minimum 24-hour notice before utility interruptions. • Utility interruptions shall not exceed one (1) working day. • Notify SAJU Administration 24 hours prior to excavation or area closures. 10. Fire Safety Requirements When performing hot work: -- 4 of 7 -- • A fire extinguisher shall be present at all times. • Contractor must certify the work area is free from fire hazards. • Contractor shall notify the COR before using open flame or heat to solder pipes because the fire suppression system is heat sensitive. 11. Site Protection and Restoration The Contractor shall: • Protect all surrounding areas during construction. • Restore affected areas to original condition. • Repair any damage at no cost to the Government. • Maintain a clean jobsite daily. 12. Training The Contractor shall provide training for park maintenance staff. Training requirements: • Minimum 2-hour training session • For four (4) NPS maintenance personnel • Training shall include: • System operation • Maintenance procedures • Troubleshooting basics 13. Deliverables Prior to Notice to Proceed The Contractor shall submit: • Equipment product submittals for COR approval • Unit dimensions and weight -- 5 of 7 -- Prior to Contract Closeout The Contractor shall provide: • Two (2) hard-bound copies of Operation and Maintenance (O&M) Manuals • One (1) hard-bound copy of warranty documentation • List of equipment model and serial numbers • Completion of required training for park personnel 14. Government Furnished Property None. 15. Safety Requirements The Contractor shall comply with: • OSHA regulations • Federal safety standards • Site-specific safety requirements 16. Security Requirements Contractor pers…