Attachment_1-_Supply_Requirement.pdf

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STATEMENT OF WORK

Seed Coolers for Wildfire Recovery - 2026

Reference List (Applicable codes)

Air-conditioning, Heating and Refrigeration Institute (AHRI)

AHRI 365 (2024) Commercial and Industrial Unitary Air- Conditioning Condensing Units

AHRI 420 (2023) Performance Rating of Forced-Circulation Free-

Delivery Unit Coolers for Refrigeration

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

ANSI/ASHRAE 15 & 34 (2022) ASHRAE Standard 15-Safety Standard for Refrigeration Systems and ANSI/ASHRAE Standard 34- Designation and Safety Classification of Refrigerants.

U.S. Department of Energy (DOE)

Energy Star Energy Star Energy Efficiency Labeling System (FEMP)

UL Solutions (UL)

UL 60335-2-40 (2022) Standard for Household and Similar Electrical

Appliances - Safety - Part 2-40: Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers

International Code Council (ICC)

ICC IBC (2024) International Building Code

Project Summary The purpose of this project is to supply and install two new walk-in coolers to expand seed storage of native species at two locations; The National Conservation Training Center (NCTC) and New River Gorge (NRG) National Park.

Scope The contractor shall provide the coolers, and all necessary supplies for the unit to operate fully for the storage of native seed at 35°F - 45°F. Coolers must match the qualities listed below, or be considered an “approved equal” by the CO.

1.0 General

1.1 The equipment provided shall be factory prefabricated and have unitized design. The equipment will allow installation without assembly and relocation without disassembly.

1.2 The Contractor shall deliver and set coolers in place. Any additional equipment (ex. cranes) are the responsibility of the contractor.

1.3 The walk-ins shall have completely piped, charged, and tested refrigeration systems.

1.4 All electrical conduits shall be surface mounted. Lights and connections between refrigeration components will be factory wired and tested.

1.5 The walk-ins shall be certified and bear the label of the following Certification Agencies:

A. National Sanitation Foundation (NSF 7) B. U.S. Dept. of Energy 2007 EISA compliant

1.6 The walk-ins as an assembly shall not be 3rd party listed. It may however use listed component parts as follows:

A. UL-Listed major refrigeration components B. UL-Listed electrical components C. Third-party listed foam insulation

2.0 Size and Capacity

2.1 The walk-ins shall be built to similar to the specified interior and exterior dimensions, using manufacturer’s standard sizes.

2.2 The walk-ins shall have sufficient refrigeration capacity to maintain operating temperature for an exterior installation in. Capacity shall be sized using the ASHRAE design ambient temperature for West Virginia zip codes 25443 and 25832, located in climate zone 4A, as shown in the attached cooler schedule. Capacity shall handle an average of (3) door openings per hour, and no load from warm products.

2.3 The coolers shall be equipped with manufacturer’s standard adjustable thermostat, with temperature set points as indicated in the attached cooler schedule.

3.0 Structure

3.1 The structure for each walk-in shall be a sandwich composite of fiberglass (FRP) interior and exterior skins bonded to an insulating foam core.

3.2 The interior and exterior fiberglass shells shall be completely seamless and will form a one-piece structure. This construction shall be water, rust, dent, and scratch resistant. The exterior shall be coated with an industrial enamel finish. The interior shall have an anti-microbial interior finish.

3.3 The roofs shall have a crown sloping away from the side with a door.

3.4 The roofs’ structure shall accommodate a live load of 70 PSF with an IBC regulated factor of safety.

4.0 Floor

4.1 A 4" (min) insulated (R-28) prefabricated floor shall be standard in each cooler. The floors shall be reinforced with wood sub floor beneath FRP, which is then bonded to the foam core. A skid resistant surface coating will be applied to floor surfaces.

4.2 Welded steel frames shall be bonded permanently to the floor exterior for lifting and anchoring connections. This frame raises the structure an additional 1.5” above grade and allows air circulation under the walk-in. Air circulation prevents corrosion and condensation and eliminates the need for an insulated or ventilated slab.

4.3 Floors shall have the capacity to support 700 lbs concentrated on a 3” diameter area.

5.0 Doors

5.1 Doors shall be constructed in the same manner, material, and thickness as the walls.

5.2 Doors and door openings shall be manufacturer’s standard size, with a minimum door width of 36”.

5.3 Doors shall be flush mounted with a magnetic gasket around three sides and an adjustable bottom sweep. When the door is closed it shall form a positive airtight seal. Door gasket shall be installed in retainer strips for easy replacement in the field.

5.4 All doors shall be supplied with doorframe heaters, which shall supply sufficient heat to prevent condensation or frost accumulation.

5.5 Doors shall incorporate a positive snap action latch with adjustable strike. The latch shall be equipped with cylinder lock and inside safety release mechanism to prevent entrapment.

The hardware shall be chrome finished and mounted with stainless steel tamper-proof screws.

5.6 Doors shall be equipped with (3) walk-in style door hinges. They shall be cam-lift type with nylon bearings and have door lift-off capability. Hinges shall be finished with chrome.

5.7 Doors shall be equipped with vinyl strip curtains and automatic door closers by default.

5.8 Doors shall be equipped with a rain cap above the opening.

5.9 Doors shall swing out.

6.0 Insulation

6.1 All insulation shall be rigid, unfaced, closed cell polyisocyanurate foam. Minimum insulation thickness shall be 4”.

6.2 The thermal conductivity (K) shall not exceed .165 (BTU's/in/sq. ft./hr. F). The thermal resistance R-factor shall not be less than 25 for coolers.

6.3 The insulation shall have an ASTM E-84 Class 1 rating with a flame spread less than 25, and smoke developed of less than 450.

7.0 Refrigeration Systems

7.1 Refrigeration condensing units and evaporators shall have qualified Annual Walk-in Energy Factor (AWEF) scores.

7.2 Refrigerant shall be R-404a, R-448a, A2L mandate compliant or an approved alternative for West Virginia requirements.

7.3 Each coolers condensers/evaporators selection shall target resting 80% relative humidity with options for humidity controls.

7.4 Supplier will install the following components for each cooler: liquid filter/drier, solenoid valve, compressor high/low pressure controls, thermostat, expansion valve, and a condenser weather hood. Condensing units will have crank-case heaters and low ambient pressure control valves.

7.5 The condensing unit shall be installed on the roofs unless otherwise noted. They shall have a weather hood with vents and color matching the walk-in paint color choice.

7.6 Coolers shall have freeze protection equipment installed in coolers. A separate thermostat will engage heat to prevent product freezing when outdoor temperatures drop below freezing.

8.0 Power and Lighting

8.1 Power supplied to each cooler shall be as noted in the attached cooler schedule.

8.2 Walk-ins shall have vapor-proof light fixtures installed. The standard fixture shall have a

100W equivalent LED bulb with 1600 lumens. All bulbs used shall exceed 40 lumens/Watt efficiency.

8.3 In each cooler one light shall be used for each 50 sq. ft. of interior floor space to provide a minimum of 10 foot-candles light intensity 30 inches above the floor.

8.4 All lights shall be operated with a pre-wired manual switch as standard, installed adjacent to the door.

9.0 Acessories

9.1 Digital Thermometer: Coolers shall have an accessible and readable thermometer.

9.2 Lock Hasp: Doors shall be equipped with padlock hasp to prevent unauthorized entry into the walk-in. The hasp shall have an inside release mechanism to prevent entrapment.

9.3 Door drip cap: Installed on all exterior doors. Redirects rain away from the door gasket.

9.4 Pressure relief vent: Relieves vacuum due to warm air shrinking as it cools.

9.5 Dehumidifier must be designed in accordance with UL 60335-2-40 and match the following or an approved equal

A. Munters Dehumidifier – sized specifically for the applicable cooler space and typical regional weather conditions, to maintain humidity set point at 40% or below.

10.0 Warranties

10.1 Warranty for both coolers must match the standards below, A. 25-year insulation warranty B. 12-year structural warranty C. 5-year compressor warranty

11.0 Execution

11.1 The contractor shall submit manufacturer’s product data and installation requirements with their bid proposal.

11.2 The Government will provide an adequately sized concrete equipment pad and power pedestal at the proposed cooler locations prior to delivery.

11.3 The Contractor will be required to:

11.3.1 Deliver and off load coolers into position as the locations indicated on the cooler schedule.

11.3.2 Make utility connections

11.3.3 Start up the coolers per manufacturer’s requirements and recommendations

11.3.4 Provide verification testing

11.3.5 Training of cooler operations and maintenance.

11.4 The Contractor shall provide coordination for the delivery and installation of the coolers at each location, with a minimum of 2 weeks lead time to ensure all government work is complete and the appropriate government staff are available at delivery.

Security

Delivery date and location must be confirmed with the appointed contracting officer’s representative (COR) in advance. As this is a government facility, all personnel entering the campus will need to show a valid Real ID at the security gates.

Final Testing and Acceptance Upon delivery and installation, the unit and its systems must be tested in the presence of the COR.

Testing must comply in accordance with both the IBC and NEC.

Contractor is to provide 2 physical and 1 digital copy of the operation and maintenance manuals to the station staff for each respective delivery location.

Provide manufacturer’s representatives trained to perform the services specified. Representatives are to provide the necessary training for the following procedures:

Charging equipment with refrigerant and oil

Starting equipment and training government personnel in proper care, operation, and maintenance.

ATTACHMENT – SEED COOLER SCHEDULE

Cooler Delivery Schedule

Location Address Quantity Operating Temperature

Size Power Contact

National Conservation Training Center (NCTC)

698 Conservation Way, Shepherdstown, WV, 25443

35°F - 45°F

8’ x 20’

240V

3 Phase

Teresa_Walter@fws.gov

New River Gorge National Park (NRG)

104 Main Street, Daniels, WV

25832

35°F - 45°F

8’ x 10’

240V

3 Phase

Doug_manning@nps.gov