3_USCG_ANT_LIS_HVAC_SOW FINAL.docx

STATEMENT OF WORK (SOW)

Replacement of HVAC Condensing Units, Indoor Air Handling Units, and Thermostats

REQUEST FOR QUOTE (RFQ) HVAC ANT LIS2

Aids to Navigation Team (ANT) Long Island Sound 120 Woodward Avenue, New Haven, CT 06512

1. Scope of Work The United States Coast Guard (USCG) requires a turnkey HVAC replacement at ANT Long Island Sound. The contractor shall provide all labor, supervision, materials, equipment, refrigerant, controls, electrical components, tools, lifts, transportation, testing, commissioning, permits, and incidentals necessary to remove and replace three (3) existing outdoor condensing units, three (3) indoor air handling units, and five (5) thermostats.

The existing heating system is operational and shall remain operational. The facility is served by an existing boiler system. When replacing the indoor air handling units, the contractor shall protect, reconnect, and place back in service the existing heating piping/hydronic heating connections associated with the air handlers. The intent of this requirement is to replace the cooling equipment and indoor air handling equipment while maintaining the existing boiler-based heating capability.

2. Existing Equipment and Observed Conditions Existing indoor units are Magic Aire/United Electric Company fan coil/air handling equipment located above the suspended ceiling. Existing data plates indicate R-22 equipment and remote-condenser style indoor fan coil/air handler units. The contractor shall field-verify all equipment data, tonnage, coil configuration, airflow, static pressure, piping sizes, duct transitions, electrical service, controls, and clearances prior to procurement or installation.

3. Replacement Requirements

3.1 Outdoor Condensing Units

Remove and properly dispose of three (3) existing outdoor air-cooled condensing units and associated obsolete components as required to complete the work.

Provide and install three (3) new matched condensing units designed for R-410A or R-454B refrigerant. R-454B is the current A2L refrigerant commonly referenced for new-generation unitary equipment; contractor shall submit the exact refrigerant type proposed for Government review prior to procurement.

New condensing units shall be matched to the new indoor air handling units/coils as complete systems. Existing R-22 coils shall not be reused with new R-410A or R-454B condensing units unless specifically engineered, rated, and approved by the equipment manufacturer in writing.

Units shall match or exceed existing cooling capacity, voltage, phase, electrical characteristics, and facility load requirements. Contractor shall verify cooling load and equipment sizing prior to ordering equipment.

Installation shall include properly sized refrigerant line sets or replacement line sets when required by the manufacturer, filter driers, service valves, disconnects, electrical whips, vibration isolation, pads/supports, anchoring, weatherproofing, and condensate/drain considerations as applicable.

Recover all existing refrigerant using approved recovery equipment and document recovery and disposal in accordance with EPA refrigerant handling requirements.

3.2 Indoor Air Handling Units

Remove and replace three (3) existing indoor air handling units/fan coil units above the suspended ceiling.

New indoor air handling units shall be compatible with the selected condensing units and refrigerant, shall be designed for the existing ducted distribution system, and shall be furnished with properly matched DX cooling coils, blower assemblies, drain pans, condensate connections, access panels, and controls.

New units shall be selected to match existing airflow, external static pressure, duct configuration, and cooling load. Contractor shall verify field dimensions and access path to ensure units can be removed and installed without unnecessary damage to ceilings, walls, piping, conduit, or ductwork.

Existing hydronic heating piping served by the facility boiler shall be protected, reconnected, insulated, leak-tested, purged of air, and placed back into service. If new hot-water coils, control valves, strainers, unions, isolation valves, or piping transitions are required for compatibility with the new air handling units, those items shall be included in the contractor proposal.

The existing boiler and heating system are not intended to be replaced under this requirement; however, the contractor is responsible for ensuring the replaced air handling units maintain the existing heating function after installation.

Contractor shall reconnect or replace condensate piping as required, verify proper pitch, trap configuration, drain pan operation, and overflow protection, and test for leaks prior to acceptance.

All duct transitions, plenums, flexible connections, insulation repairs, sealing, and supports required to provide a complete operational system shall be included.

3.3 Thermostats and Controls

Remove and replace five (5) existing thermostats with programmable digital thermostats compatible with the installed HVAC systems and the existing heating/cooling control strategy.

Thermostats shall be properly mounted, leveled, labeled, wired, programmed, and tested with both cooling operation and existing hydronic heating operation.

Control wiring, relays, transformers, low-voltage components, and interface devices required to integrate the new equipment shall be included.

Contractor shall verify sequence of operation with the COR and unit personnel prior to final acceptance.

4. Refrigerant and System Design Requirements Existing equipment data plates indicate R-22 equipment. New work shall not be based on charging or reusing R-22 equipment. The contractor shall submit a complete matched-system design using either R-410A or R-454B refrigerant, including manufacturer cut sheets, AHRI data when available, refrigerant safety classification, installation requirements, piping limitations, and charging procedures.

R-410A systems shall be furnished as new matched equipment with approved coils and controls.

R-454B systems shall include all manufacturer-required A2L refrigerant safety provisions, labeling, leak detection, ventilation or mitigation requirements, installation clearances, and technician requirements applicable to the selected equipment.

Refrigerant piping shall be sized and installed in accordance with manufacturer requirements for vertical lift, equivalent length, oil return, pressure drop, and serviceability.

All brazed joints shall be completed using nitrogen purge. Systems shall be pressure tested, leak checked, evacuated to manufacturer requirements, and charged by weight or manufacturer-approved method.

Final startup readings shall include suction pressure, liquid pressure, superheat/subcooling, indoor/outdoor dry bulb and wet bulb readings as applicable, voltage, amperage, and temperature split.

5. Technical and Code Compliance All work shall be performed in a professional and workmanlike manner by a licensed HVAC contractor. Technicians performing refrigerant work shall hold current EPA Section 608 certification and any additional certification required for the proposed refrigerant and equipment type.

Comply with manufacturer installation instructions, International Mechanical Code (IMC), National Electrical Code (NEC), International Energy Conservation Code (IECC), applicable Connecticut building/mechanical/electrical codes, EPA refrigerant handling requirements, OSHA safety requirements, and all federal, state, and local regulations.

Electrical work shall be performed by qualified personnel. Contractor shall verify disconnects, breakers, wire size, grounding, phase, voltage, and overcurrent protection before startup.

Firestopping, penetrations, insulation repairs, ceiling tile removal/reinstallation, and duct sealing shall be completed in accordance with applicable code and good trade practice.

USCG Aids To Navigation Team Long Island Sound facilities may contain lead and asbestos-containing materials. Contractor shall inspect, test, and properly manage any suspect materials in accordance with applicable regulations to prevent facility contamination.

6. Contractor Responsibilities Provide all labor, equipment, materials, tools, lifts, rigging, disposal, supervision, permits, and incidentals needed to complete the work.

Field verify all existing equipment information, dimensions, piping, ducts, controls, electrical service, ceiling access, and site constraints prior to ordering materials.

Coordinate all outages, access, delivery, ceiling work, equipment staging, and testing with the USCG Contracting Officer Representative (COR).

Protect floors, ceiling grid, ceiling tiles, walls, furniture, duct insulation, piping, conduit, fire alarm/smoke detection devices, and all Government property during performance of work.

Maintain a clean and safe work area daily. Remove debris and dispose of removed equipment and refrigerant in accordance with applicable requirements.

Do not leave the facility without heating capability unless coordinated and approved in advance by the COR. Any heating interruption must be minimized and restored prior to final acceptance.

7. Submittals and Closeout Documentation Manufacturer cut sheets for condensing units, air handling units, coils, thermostats, controls, and major accessories.

Matched-system performance data, refrigerant type, cooling capacity, airflow, electrical data, and efficiency data.

Proposed sequence of operation for cooling and existing hydronic heating integration.

EPA refrigerant recovery documentation for existing equipment.

Startup and commissioning report for each system, including electrical readings, refrigerant readings, temperature split, airflow/static pressure where measured, condensate drainage verification, and thermostat/control testing.

Warranty documentation, owner/operator manuals, and recommended maintenance requirements.

8. Quality Control, Startup, and Acceptance The contractor shall fully commission each HVAC system prior to requesting Government acceptance. Final inspection and operational testing shall be coordinated with the COR. Acceptance will be based on complete installation, safe operation, proper cooling performance, preserved heating operation, leak-free hydronic and condensate piping, proper thermostat operation, and receipt of required closeout documentation.

Verify each new condensing unit and air handling unit is installed level, secure, accessible, and properly labeled.

Verify refrigerant piping is leak-free, insulated where required, properly supported, evacuated, and charged.

Verify condensate pans and drains are properly trapped, pitched, leak-free, and draining correctly.

Verify boiler/hydronic heating piping associated with replaced air handlers is reconnected, insulated, leak-free, purged, and operational.

Verify thermostats operate the correct equipment and properly call for cooling and heating.

Provide operational demonstration to unit personnel and COR upon completion.

9. Warranty The contractor shall provide a minimum one (1) year warranty on labor and installation workmanship. Manufacturer warranties for condensing units, air handling units, coils, thermostats, controls, and accessories shall be provided to the Government. Warranty period shall commence upon final Government acceptance.

10. Period of Performance and Work Hours The period of performance shall be thirty (30) calendar days from the date of Notice to Proceed (NTP), unless otherwise modified by the Contracting Officer. Standard work hours are Monday through Friday, 0800-1500. Work outside these hours must be coordinated with and approved by the COR in advance. Contractor shall coordinate work phasing to minimize disruption to ANT Long Island Sound operations.

11. Site Visit Offerors are highly encouraged to conduct a site visit prior to proposal submission to verify equipment size, tonnage, electrical service, duct configuration, hydronic piping configuration, refrigerant line routing, ceiling access, controls, thermostat wiring, condensate drainage, staging, and all site conditions. Submission of an offer constitutes acknowledgment of existing site conditions and access constraints.

12. 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 on-site technical representative for this project. The COR is responsible for coordinating contractor access, verifying work progress and compliance with this SOW, coordinating outages with unit 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.

13. 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 10209-1027 Quotes should be sent to email address Beverly.a.primm@uscg.mil

14. Photo Documentation - Existing Conditions The following photos document existing indoor air handling unit data plates, above-ceiling equipment conditions, ductwork, hydronic/refrigerant piping, and access constraints observed at ANT Long Island Sound.

Photo 1: Existing Magic Aire manufacturer data plate, Model 36-BHX-3, Serial/Lot No. 980964246, Date of Manufacture 09/17/98.

Photo 2: Existing above-ceiling Magic Aire air handling unit with piping and gauge visible.

Photo 3: Existing air handling unit labeled near CAI; above-ceiling equipment and controls condition.

Photo 4: Existing electric heater/control data plate, model and electrical data partially visible; field verification required.

Photo 5: Existing ductwork and above-ceiling access condition adjacent to ceiling grid and lighting.

Photo 6: Existing piping, condensate/drain connection, ductwork, and equipment access condition.

Photo 7: Existing Magic Aire manufacturer data plate, Model HB16-3D-2W, Serial No. W090622895, 480V/3-phase/60Hz, R-22.

Photo 8: Existing ceiling access, smoke detector, ladder access, and air handling unit location.

Photo 9: Existing ductwork and ceiling-mounted air handling equipment access condition.

ADDITIONAL PHOTO DOCUMENTATION - OUTDOOR CONDENSING UNITS

The following additional photographs document existing outdoor condensing units and available manufacturer nameplate information. Photos are provided for bidder reference and to support field verification of existing equipment conditions, electrical characteristics, refrigerant type, and equipment accessibility. The contractor shall field verify all equipment data, connected load, refrigerant line routing, disconnects, breaker sizing, and replacement requirements prior to ordering materials.

Additional Identifiable Manufacturer Plate Information

Note: Existing exterior equipment shown in the additional photographs exhibits age and corrosion on fan guards and cabinet components. Replacement condensing units shall be properly matched to the new indoor air handling units and shall be designed for R-410A or R-454B refrigerant, as applicable to the selected equipment and current manufacturer requirements. Existing R-22 equipment shall not be reused as replacement equipment.

Additional Photo 1: Existing exterior condensing units located on existing concrete pad. Existing equipment shows age/weathering and fan guard corrosion.

Additional Photo 2: Existing exterior condensing unit and refrigerant/electrical line routing entering building wall. Existing concrete pad and equipment access shall be field verified.

Additional Photo 3: Existing manufacturer plate for American Standard Alliance 11 condensing unit. Plate is partially weathered; contractor shall confirm model, serial, electrical, refrigerant, and capacity in the field.

USCG ANT Long Island Sound HVAC Replacement SOW | Government Use image3.jpg image4.jpg image5.jpg image6.jpg image7.jpg image8.jpg image9.jpg image10.jpeg image11.jpeg image12.jpeg image1.jpg image2.jpg