A04_SOW_Part_1.pdf

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Mammoth Cave National Park

STATEMENT OF WORK

Replace HVAC Units at MACA Buildings

PMIS #335835

DATED: 2/28/2025

NATIONAL PARK SERVICE

SOUTHEAST REGION

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DIVISION 01 - GENERAL REQUIREMENTS

DIVISION 1 SHORT FORM GENERAL REQUIREMENTS

ITEM 1. DESCRIPTION OF WORK

This project involves the replacement of 9 HVAC units across 6 buildings at Mammoth Cave National Park. The work will be performed entirely by National Park Service (NPS) staff in accordance with NPS facility maintenance standards, OSHA regulations (29 CFR 1926), ANSI safety guidelines, and the Architectural Barriers Act (ABA) for accessibility compliance.

1.1 Scope of HVAC Work

HVAC Units to be Installed

The following HVAC systems will be purchased per the specifications provided in the procurement quote:

Building System Description Capacity Quantity

Maple Springs Bunkhouse Heat Pump Split 3.5T 1

IT/EE Office #1 LP/HP Split 3T/100k BTU 1

IT/EE Office #2 Heat Pump Split 2.5T HP 1

Ranger Station #1 Heat Pump Split 3T HP 1

FM Office #1 LP/Electric Split 2.5T/90k BTU 1

Training Center LP/Electric Split 3T/70k BTU 2

SRM #3 Heat Pump Split 3T 2

Specifications for Replacement Units

The new HVAC units will meet the following specifications to ensure energy efficiency, reliability, and compliance with regulatory standards:

Heat Pump Specifications:

Performance Requirements: SEER2 Rating ≥ 16.0, EER2 Rating ≥ 12.0, Two Stage operation.

Acceptable Models: Comparable or superior to Bryant 127T in efficiency, reliability, and functionality.

Performance Requirements: AFUE Rating ≥ 96%, Minimum Capacity Configuration: Multipoise setup to allow flexible installation.

Refrigerant must be either 410a or 32b.

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Each Heat Pump shall have a 5K backup heat strip Acceptable Models: Comparable or superior to Bryant 926TB.

Type: Multipoise Coil-Cased.

Thermostats:

Features: Touchscreen, lockable, programmable, Wi-Fi capable.

Split Unit Specifications:

Performance Requirements: SEER2 Rating ≥ 16.0, EER2 Rating ≥ 12.0.

Acceptable Models: Comparable or superior to Bryant 127T in efficiency, reliability, and functionality.

Performance Requirements: AFUE Rating ≥ 96%.

Configuration: Multipoise setup to allow flexible installation.

Refrigerant must be either 410a or 32b.

Type: Multipoise A Coil-Cased.

Thermostats:

Features: Touchscreen, lockable, programmable, Wi-Fi capable.

General Equipment Guidelines:

Brand Neutrality: Proposals from any manufacturer are acceptable, provided they meet or exceed the performance, reliability, and energy efficiency of specified models.

General Equipment Guidelines:

Brand Neutrality: Proposals from any manufacturer are acceptable, provided they meet or exceed the performance, reliability, and energy efficiency of specified models.

Regulatory Requirements

The replacement of these HVAC units must comply with:

OSHA 29 CFR 1910.134 – Indoor air quality and ventilation safety standards.

ASHRAE 90.1 – Energy efficiency standards for HVAC systems in commercial buildings.

EPA Clean Air Act (Section 608) – Regulations for refrigerant management and leak prevention.

Architectural Barriers Act (ABA) Standards – Ensuring accessible placement and operation of HVAC controls.

Additionally, the following components and accessories will be included in the purchase:

Propane Conversion Kits for applicable units Thermostats for each unit 50’ Line Sets

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1.2 Work Breakdown

HVAC System Components:

Refrigerant Lines: Replace all existing lines and perform an R11 x line flush as part of the installation.

Thermostat Installation: Remove old thermostats and install new units with Wi-Fi capability, programmable settings, and lockable features to ensure compatibility and maximize efficiency with the new HVAC systems. These will also integrate with the existing Wi-Fi network.

Indoor Unit Installation:

Install new indoor units, including all necessary electrical work, and reconnect to existing condensate systems.

Duct System: Install new or reconnect existing ductwork, ensuring proper sizing and modifications as needed.

Electrical and Control Systems: Reconnect and upgrade existing electrical systems for both indoor and outdoor units as necessary.

Removal and Disposal of Existing HVAC Units

Disconnect and remove 9 existing HVAC units, following OSHA Lockout/Tagout (LOTO) requirements (29 CFR 1910.147).

Recover and dispose of refrigerants per EPA Section 608 regulations.

Dispose of old HVAC units and related debris in accordance with federal, state, and local environmental standards.

Venting and Piping

Installation: Install new or reconnect existing flue piping, with routing through appropriate structural elements (foundation, roof, wall, or chimney).

Waste Management and Equipment Removal

Old Equipment Removal: Dispose of old ductwork and outdated equipment from the job site.

Quality Assurance and Inspection

System Testing: Conduct inspections and tests on all installed components to ensure functionality and operational efficiency. Seal any loose flex duct branches.

Additional Installation Services

Protective Coatings: Apply epoxy-based weather-resistant coatings to ductwork exteriors, ensuring adherence to manufacturer specifications and industry best practices for durability and protection.

Condensate Management: Install a new condensate pump with safety features to prevent overflow and enhance operation.

LP Conversion Kits: Install a conversion kit on each furnace to utilize the park’s propane fuel source, ensuring proper functionality and safety.

Testing & Commissioning

Start-Up and Verification Procedures:

Initial Start-Up: Conduct thorough start-up procedures for all HVAC units following manufacturer guidelines and best practices. This includes checking that all units function correctly, settings are accurately calibrated, and performance meets specified levels.

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System Testing: Document and compare all initial readings and test results against manufacturer’s standards, adjusting settings as needed to optimize unit performance and energy efficiency.

Safety and Operational Checks: Ensure all components are tested and fully operational, and all safety checks are completed before finalizing the start-up process.

Training and Documentation:

Maintenance Training: Provide comprehensive training for Mammoth Cave National Park maintenance personnel on operation, routine maintenance, and basic troubleshooting of the new HVAC equipment.

Documentation and Support: Supply all necessary documentation, manuals, and access to manufacturer’s online resources or support services. Review and instruct on the manufacturer's maintenance schedules to ensure prolonged efficiency and functionality of the units.

ITEM 2. EXISTING UTILITIES

Electrical Systems: Evaluate and ensure compatibility of existing power supplies with new HVAC units. Modifications will be made as needed.

Condensate Drainage: Ensure proper drainage and connectivity to existing building systems.

ITEM 3. NPS STAFF USE OF PREMISES

Work areas will be restricted to designated mechanical rooms, rooftops, and HVAC pad locations to minimize impact on park operations.

Proper safety barricades and signage will be placed around work zones.

Coordination with park facility managers and visitor services will ensure minimal disruptions.

ITEM 4. EXAMINATION OF THE SITE

A pre-work inspection will be conducted by the NPS maintenance team to evaluate site conditions.

Any unexpected conditions (e.g., structural issues, incompatible utilities) will be addressed with park facility management before proceeding.

ITEM 5. ABBREVIATIONS

NPS – National Park Service

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HVAC – Heating, Ventilation, and Air Conditioning

ASHRAE – American Society of Heating, Refrigerating, and Air-Conditioning Engineers

EPA – Environmental Protection Agency

OSHA – Occupational Safety and Health Administration

NFPA – National Fire Protection Association

ABA – Architectural Barriers Act

ITEM 6. ACCIDENT PREVENTION

Job Hazard Analysis (JHA) will be conducted before work begins to identify safety concerns.

Compliance with OSHA 29 CFR 1926 safety requirements, including:

o Fall Protection for any work performed at height (e.g., rooftop units).

o Electrical Safety Training for team members handling wiring and connections.

o Refrigerant Safety Training per EPA guidelines for handling and disposal.

Emergency Response Plan: Procedures will be in place for injuries, refrigerant leaks, and fire hazards.

ITEM 7. PRECONSTRUCTION MEETING

Before starting work, a preconstruction meeting will be held to cover:

Project timeline and sequencing of HVAC replacements.

Coordination with park operations to minimize visitor impact.

Review of safety requirements and hazard controls.

ITEM 8. SUBMITTALS

The following documentation must be submitted to NPS facility management upon completion:

Manufacturer’s specifications and installation manuals for all new HVAC units.

Safety Data Sheets (SDS) for any hazardous materials used during installation.

Final system performance test results confirming proper operation.

Training materials and maintenance instructions for long-term upkeep.

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ITEM 9. TEMPORARY SERVICES

Temporary electrical power or water will be arranged if needed for installation and testing.

Ventilation control measures will be used to prevent dust and debris contamination in occupied areas.

ITEM 10. PROJECT CLOSEOUT

Cleanup and Damage Control:

Final Cleaning: Remove all tools, equipment, surplus materials, and rubbish to ensure the project site is thoroughly clean and ready for use at the time of the final inspection.

Inspection and Certification:

Substantial Completion: Submit a written certification declaring that the project is substantially complete by NPS staff.

Warranties:

Documentation: Ensure all warranties required by the specifications are accounted for and properly disposed of or executed.