3_USCG_Station_New_Haven_HVAC_SOWFINAL.docx

STATEMENT OF WORK (SOW)

Replacement of Two (2) HVAC Condensing Units, Two (2) Indoor Air Handling Units, and Three (3) Listed Thermostats

REQUEST FOR QUOTE (RFQ) HVAC STA NEW HAV2

United States Coast Guard Station New Haven New Haven, Connecticut

1. PROJECT INFORMATION

2. SCOPE OF WORK

The Contractor shall provide all labor, supervision, materials, equipment, tools, transportation, permits, refrigerant, electrical components, controls, safety equipment, disposal, commissioning, and incidentals required to perform a complete and operational HVAC replacement at USCG Station New Haven. This work shall include replacement of two (2) outdoor condensing units, two (2) indoor air handling units, and three (3) listed interior thermostats. The work shall be completed as a professional, code-compliant, manufacturer-approved installation and shall be coordinated with the USCG COR to minimize disruption to station operations.

3. EXISTING CONDITIONS AND FIELD VERIFICATION

Existing outdoor condensing units and indoor equipment are located at USCG Station New Haven. Existing equipment includes older R-22 and R-410A systems, based on visible manufacturer plate information and observed field conditions.

The Contractor shall verify all equipment capacities, tonnage, BTU output, voltage, phase, MCA, MOCP, breaker size, disconnect rating, wiring, refrigerant line sizes, thermostat wiring, duct connections, condensate routing, hydronic heating coil piping, and physical access constraints prior to ordering equipment.

Visible manufacturer plate information is provided in this SOW for reference only. The Contractor remains responsible for field verification and for providing a properly matched AHU/coil/condensing unit package approved by the equipment manufacturer.

Existing concrete pads, wall penetrations, refrigerant line routing, control wiring, electrical disconnects, and service clearances shall be inspected for reuse, repair, or replacement as required for a compliant installation.

4. EQUIPMENT REPLACEMENT REQUIREMENTS

4.1 Outdoor Condensing Units

Remove and properly dispose of two (2) existing outdoor air-cooled condensing units and associated components no longer required for the new installation.

Provide and install two (2) new outdoor condensing units sized to match the cooling load and compatible with the new indoor air handling units. Equipment shall match or exceed existing capacity, electrical characteristics, and current efficiency requirements unless otherwise approved by the Contracting Officer.

New condensing units shall be designed for currently available refrigerant systems, including R-410A or R-454B, as applicable to manufacturer availability and code requirements. R-454B is a current low-GWP A2L refrigerant used by many manufacturers for new HVAC equipment. The Contractor shall not mix refrigerants and shall ensure all installed components are listed and rated for the selected refrigerant.

If R-454B or another A2L refrigerant system is proposed, the Contractor shall install equipment, controls, signage, refrigerant leak mitigation, safety devices, and procedures required by the manufacturer and applicable mechanical, electrical, fire, and safety codes.

Installation shall include, as required, new filter driers, liquid-line and suction-line accessories, service valves, electrical whips, disconnects, equipment anchorage, vibration isolation pads, corrosion-resistant fasteners, and all related startup materials.

Existing refrigerant piping may be reused only if it is properly sized, pressure-rated, leak-free, internally clean, compatible with the new refrigerant and oil, and accepted by the equipment manufacturer. Otherwise, the Contractor shall replace the line set or flush/prepare it in accordance with manufacturer requirements.

4.2 Indoor Air Handling Units

Remove and properly dispose of two (2) existing indoor air handling units and associated cooling coil components as required to complete the replacement.

Provide and install two (2) new indoor air handling units compatible with the new outdoor condensing units. New equipment shall include properly matched evaporator coils, blower assemblies, condensate drain pans, insulation, access panels, controls, and required safety devices.

Contractor shall reconnect to existing ductwork and provide all required sheet metal transitions, sealing, insulation, supports, vibration isolation, and access provisions. Duct connections shall be sealed to prevent air leakage and condensation.

Contractor shall verify airflow, external static pressure, blower speed, filter rack configuration, condensate drainage, and service clearance. Airflow shall be balanced and adjusted to manufacturer specifications during startup.

Condensate drains shall be trapped, pitched, supported, and tested for proper drainage. Secondary drain pans, float switches, or condensate safety switches shall be provided where required by code or manufacturer requirements.

4.3 Existing Heating System / Boiler Integration

The existing heating system is understood to be operational. The facility has an existing boiler/hydronic heating system serving the indoor air handling equipment through heating piping and/or hot-water coil components.

Replacement air handling units shall be selected and installed to maintain the existing heating function. Existing hydronic heating piping shall be preserved, properly isolated, drained as required, protected during demolition, and reconnected or adapted to the new air handling units in a professional manner.

The Contractor shall include all piping modifications, valves, unions, insulation, hangers, gaskets, fittings, coil connections, air bleeding, leak testing, and system restoration required to place the heating piping back in service.

This SOW does not include replacement of the existing boiler unless specifically authorized by contract modification. Any boiler-related deficiency discovered during the work shall be reported to the COR before corrective work is performed.

4.4 Thermostats and Controls

Remove and replace three (3) listed interior thermostats with programmable digital thermostats compatible with the installed HVAC systems, including cooling, fan, and existing hydronic/boiler heating control functions as applicable.

Thermostats shall support required staging, fan auto/on settings, programmable scheduling, and system mode functions. Contractor shall verify control wiring, including R, Y, W, G, C, common wire availability, relay requirements, transformer capacity, and boiler/heating call interface.

Thermostats shall be properly mounted, leveled, wired, programmed, labeled where necessary, tested, and demonstrated to unit personnel upon completion.

5. REFRIGERANT MANAGEMENT AND EPA COMPLIANCE

Contractor shall recover all existing refrigerant using EPA-certified recovery equipment in accordance with EPA Section 608 requirements and all applicable federal, state, and local regulations.

Existing R-22 refrigerant shall not be vented. Recovery documentation shall be provided to the Government, including refrigerant type and quantity recovered where available.

New systems shall be pressure tested with dry nitrogen, leak checked, evacuated to manufacturer-specified micron level, and charged in accordance with manufacturer data plates and startup procedures.

Final refrigerant charge shall be documented, and startup readings shall include outdoor ambient temperature, suction pressure, liquid pressure, superheat, subcooling, supply air temperature, return air temperature, and electrical amperage readings as applicable.

6. ELECTRICAL REQUIREMENTS

Contractor shall verify existing electrical service, breaker sizing, conductor size, grounding, disconnect ratings, fusing, overcurrent protection, and equipment MCA/MOCP requirements prior to equipment procurement and installation.

All electrical work shall comply with the National Electrical Code (NEC), manufacturer installation instructions, and local requirements. Disconnects, whips, conduit, fittings, and wiring shall be replaced where damaged, undersized, or incompatible with the new equipment.

Any electrical deficiencies identified that are outside the direct replacement scope shall be reported to the COR before corrective work proceeds.

7. TECHNICAL AND CODE COMPLIANCE

All work shall be performed by a licensed HVAC contractor using qualified technicians. Technicians handling refrigerant shall hold current EPA certification.

Work shall comply with manufacturer specifications, International Mechanical Code (IMC), National Electrical Code (NEC), EPA refrigerant handling requirements, applicable A2L refrigerant safety requirements, and all federal, state, local, trade, legal, and regulatory standards.

All penetrations, seals, insulation, supports, hangers, and equipment anchorage shall be completed in a durable, professional, and weather-resistant manner.

The Contractor shall maintain a clean and safe work area and shall protect Government property from damage. Ceiling tiles, access panels, insulation, finishes, and work areas disturbed by the installation shall be restored to a neat and serviceable condition.

8. QUALITY CONTROL, STARTUP, AND COMMISSIONING

Contractor shall perform manufacturer-required startup and commissioning procedures for each system.

Each system shall be tested in cooling mode and heating mode to confirm proper thermostat operation, fan operation, compressor operation, condensate removal, airflow, and boiler/hydronic heating call response.

Contractor shall provide startup sheets, refrigerant recovery documentation, equipment submittals, manufacturer warranty information, thermostat programming information, and as-built notes for any changes to line routing, controls, or electrical connections.

Final inspection and acceptance shall be coordinated with the USCG COR. The Contractor shall correct any deficiencies identified during final inspection before project acceptance.

9. PERIOD OF PERFORMANCE

The period of performance shall be thirty (30) calendar days from the date of Notice to Proceed (NTP), unless otherwise directed by the Contracting Officer.

All removals, installation, startup, testing, training, cleanup, documentation, and commissioning shall be completed within the period of performance.

10. SITE VISIT

Offerors are highly encouraged to conduct a site visit prior to proposal submission to verify equipment capacity, refrigerant line routing, electrical service, pad condition, roof/ceiling access, air handler access, hydronic heating piping configuration, thermostat locations, and control requirements.

Submission of a proposal constitutes acknowledgment that the offeror has reviewed the existing conditions and included all necessary work for a complete, operational, and code-compliant installation.

11. WARRANTY

Contractor shall provide a minimum one (1) year warranty on labor and installation workmanship from the date of Government acceptance.

Manufacturer warranties for all condensing units, air handling units, coils, motors, controls, and thermostats shall be provided to the Government upon project completion.

Warranty service shall include correction of installation defects, leaks, control issues, condensate drainage issues, and startup deficiencies attributable to the Contractor’s workmanship.

12. SAFETY AND ENVIRONMENTAL NOTES

USCG Station New Haven facility may contain lead-based paint, asbestos-containing materials, or other suspect materials. Contractors shall inspect, test, and properly manage suspect materials in accordance with applicable regulations and shall not disturb hazardous materials without proper authorization and controls.

Contractor shall use proper lockout/tagout, fall protection, ladder safety, electrical safety, refrigerant handling, hot work controls, and personal protective equipment throughout the project.

All removed equipment, refrigerant, scrap materials, packaging, and waste shall be removed from the site and disposed of in accordance with applicable regulations.

13. CONTRACTING OFFICER REPRESENTATIVE (COR)

Name: Coyet Carter Phone: 443-760-5034 Organization: U.S. Coast Guard Sector Long Island Sound Address: 120 Woodward Avenue, New Haven, CT 06512 The COR shall serve as the Government’s on-site technical representative for the duration of this project. The COR is responsible for coordinating access, verifying work progress, reviewing technical compliance, coordinating outages with station personnel, and ensuring safety and operational requirements are followed. The COR does not have authority to modify the contract. All contractual changes must be authorized by the Contracting Officer.

14. CONTRACTING OFFICER (KO)

Name: Beverly Primm Phone: 571-610-0476 Email: Beverly.a.primm@uscg.mil Organization: U.S. Coast Guard Base Boston Address: 427 Commercial St., Boston, MA 02109-1027 Quotes shall be submitted to the Contracting Officer at Beverly.a.primm@uscg.mil, unless otherwise directed in the solicitation or by the Contracting Officer.

15. VISIBLE EQUIPMENT NAMEPLATE INFORMATION

Note: Nameplate information is provided from visible photographs only and shall not replace contractor field verification. If any information conflicts with field conditions, the Contractor shall notify the COR prior to ordering equipment.

16. PHOTO DOCUMENTATION - EXISTING CONDITIONS

Figure 1. Existing Trane outdoor condensing unit manufacturer plate showing R-22 equipment data.

Figure 2. Indoor air handling unit labeled AHU 2 with visible refrigerant and condensate piping.

Figure 3. Interior overhead piping, controls, wiring, and ductwork associated with AHU replacement area.

Figure 4. Mitsubishi outdoor condensing unit manufacturer plate showing R-410A equipment data.

Figure 5. American Standard / Trane indoor air handler electric heater manufacturer plate.

Figure 6. American Standard / Trane indoor unit label and AHU identification.

Figure 7. American Standard / Trane indoor unit manufacturer plate overview.

Figure 8. Exterior existing outdoor condensing units and electrical service/disconnect location.

Figure 9. Exterior existing outdoor condensing unit and pad condition at Station New Haven.

USCG Station New Haven HVAC Replacement SOW image3.jpg image4.jpg image5.jpg image6.jpg image7.jpg image8.jpg image9.jpg image1.jpg image2.jpg