B08_Solicitation_(Attch_1_SOW_(BUFF_TBVC_HVAC)).pdf

Solicitation 140P6222Q0004 Attachment 1

Buffalo National River Harrison, Arkansas

STATEMENT OF WORK FOR

Replace HVAC Tyler Bend Visitor Center

PMIS 325089

Project # 36623

NATIONAL PARK SERVICE MIDWEST

REGION

March 8, 2022

Statement of Work

Remove, Replace, Dispose HVAC System

Tyler Bend Visitor Center

LOCATION & DESCRIPTION

This project is located at the Tyler Bend Visitor Center, 170 Ranger Rd. St. Joe, Arkansas

This project shall include all equipment, supplies, materials, labor and transportation to remove, install and dispose of the HVAC systems according to the specifications. The work of this contract shall be performed to meet all federal, state, and local rules and regulations. The government anticipates that the work will consist of supply components with labor for installation and cleaning to be provided by qualified HVAC installation contractors.

PERIOD OF PERFORMANCE:

45 days after award.

SCOPE OF WORK

Removal and proper disposal of existing gas-fired furnaces, coil and condensing units.

Evacuate and removal of refrigeration piping completely to ensure safe containment of refrigerant. Disconnect and remove condensing unit power and control wiring back to the power and control panels.

Repair of existing ductwork and insulation at the point of connection for new equipment.

Replace Gas-fired, condensing furnaces, coil and condensing units.

Provide all OEM Manuals and Warranty Documentation for installed units

HOURS OF OPERATION

8:00am to 5:00 pm Monday thru Friday, except when otherwise indicated.

Work on Saturdays, Sundays, Federal Holidays, early morning, or at night may not be performed without prior consent from the Contracting Officer. Submit requests for work outside of the stated normal business hours to the Contracting Officer for approval at least 48 hours in advance of the work.

WARRANTY

Special Warranty: Manufacturer agrees to repair or replace the following components of furnaces that fail in materials or workmanship within specified warranty period. Contractors must provide warranty documentation supporting warranty as described below from the manufacturer of the equipment identifying the Buffalo River National River maintenance division as the contact for warranty repairs:

1. Warranty Period, Commencing on Date of final testing/commissioning/acceptance of system:

2. Furnace Heat Exchanger: 10 years minimum.

3. Integrated Ignition and Blower Control Circuit Board: 5 years minimum.

4. Draft-Inducer Motor: 5 years minimum.

5. Refrigeration Compressors: 5 years minimum.

6. Evaporator and Condenser Coils: 5 years minimum.

PRODUCT DESCRIPTION

The current system consists of two (2) units (please see Solicitation attachments 2 and 3 for pictures of the units in their current location):

Manufacturer Equipment Type Model Number

Trane

Gas Furnace and

Condenser

YHC067E3RHA0B

Electrical Components. Devices, and Accessories: Work must be completed by a certified electrician to follow national and state codes.

GAS-FIRED FURNACES, CONDENSING

The current system at the Visitor Center shall be replaced with the following components or an approved equal. NOTE: All new units shall match existing Supply and Return duct work connection dimensions. References in specifications to any brand name equipment or materials shall be regarded as establishing a standard of quality and shall not be construed as limiting competition. The

Contractor may submit proposed equal equipment and/or materials for government consideration during the submittal process of the contract.

1. Trane Precedent 5 Ton 230V 3 phase Commercial Packaged Gas/Electric Unit or equivalent

Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equals (contractors must provide a submittal of equipment/accessories to be installed meeting the salient characteristics described for government review/approval prior to ordering or installing components. All major equipment pieces/accessories must be identified with supporting literature for review. The government reserves the right to request additional details relating to the equipment chosen for installation before approving submittals):

Bryant Heating & Cooling Systems; a unit of United Technologies Corp.

Carrier Corporation; a unit of United Technologies Corp.

Lennox Industries, Inc.; Lennox International.

Rheem Manufacturing Company; Heating and Cooling Products.

Ruud Air Conditioning Division.

Heil

Goodman.

Other Approved Equals.

Cabinet: Galvanized steel.

Cabinet interior around heat exchanger shall be factory-installed insulation.

Lift-out panels shall expose burners and all other items requiring access for maintenance.

Factory paint external cabinets in manufacturer's standard color.

Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

Fan: Centrifugal, factory balanced, resilient mounted, direct drive.

Special Motor Features, ECM: Electronically controlled motor (ECM) controlled by integrated furnace/blower control.

Type of Gas: Propane.

Heat Exchanger:

Primary: Stainless steel.

Burner:

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Gas Valve: 100 percent safety modulating main gas valve, main shutoff valve, pressure regulator, safety pilot with electronic flame sensor, limit control, transformer, and combination ignition/fan timer control board.

Ignition: Electric pilot ignition, with hot-surface igniter or electric spark ignition.

Gas-Burner Safety Controls:

Electronic Flame Sensor: Prevents gas valve from opening until pilot flame is proven;

stops gas flow on ignition failure.

Flame Rollout Switch: Installed on burner box; prevents burner operation.

Limit Control: Fixed stop at maximum permissible setting; de-energizes burner on excessive bonnet temperature; automatic reset.

Combustion-Air Inducer: Centrifugal fan with thermally protected motor and sleeve bearings pre-purges heat exchanger and vents combustion products; pressure switch prevents furnace operation if combustion-air inlet or flue outlet is blocked.

Furnace Controls: Solid-state board integrates ignition, heat, cooling, and fan speeds; adjustable fan-on and fan-off timing; terminals for connection to accessories; diagnostic light with viewport.

Accessories:

Select vent location.

Combination Combustion-Air Intake and Vent: PVC plastic fitting to combine combustion-air inlet and vent through outside wall.

CPVC Plastic Vent Materials:

CPVC Plastic Pipe: Schedule 40, complying with ASTM F441/F441M.

CPVC Plastic Fittings: Schedule 40, complying with ASTM F438, socket type.

CPVC Solvent Cement: ASTM F493.

PVC Plastic Vent Materials:

PVC Plastic Pipe: Schedule 40, complying with ASTM D1785.

PVC Plastic Fittings: Schedule 40, complying with ASTM D2466, socket type.

PVC Solvent Cement: ASTM D2564.

Gas:

Type: Propane.

Venting Type: Power venter with combustion-air intake.

AIR FILTERS

Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equal:

Aprilaire; Research Products Corp.

Filtrete Home Filtration Products; a 3M brand.

General Filters, Inc.

Permatron Corporation.

Disposable Filters: 2” thick fiberglass media with ASHRAE 52.2 MERV rating of 8 or higher, in sheet metal frame.

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REFRIGERATION COMPONENTS

General Refrigeration Component Requirements:

Refrigeration compressor, coils, and specialties shall be designed to operate with R-410A

Refrigerant.

Refrigeration components and cooling system to be by the same manufacturer as the furnace with published cooling performance data as an assembly.

Energy Efficiency: Equal to or greater than prescribed by ASHRAE/IES 90.1.

Refrigerant Coil: Copper tubes mechanically expanded into aluminum fins. Comply with

AHRI 210/240. Match size with furnace. Include condensate drain pan with accessible drain outlet complying with ASHRAE 62.1.

Refrigerant Coil Enclosure: Steel, matching furnace width with access panel and flanges for integral mounting on furnace cabinet and galvanized sheet metal drain pan coated with black asphaltic base paint.

Refrigerant Line Kits: Annealed-copper suction and liquid lines factory cleaned, dried, pressurized with nitrogen, sealed, and with suction line insulated. Provide in standard lengths for installation without joints, except at equipment connections.

Flexible Elastomeric: Closed-cell, sponge- or expanded-rubber materials. Comply with

ASTM C534/C534M, Type I, 1 inch (25 mm) thick.

Air-Cooled Compressor-Condenser Unit:

Casing: Steel, finished with baked enamel, with removable panels for access to controls, weep holes for water drainage, and mounting holes in base. Provide brass service valves, fittings, and gage ports on exterior of casing.

Compressor: Hermetically sealed scroll type.

Crankcase heater.

Vibration isolation mounts for compressor.

Compressor motor shall have thermal- and current-sensitive overload devices, start capacitor, relay, and contactor.

Two-speed compressor motors shall have manual-reset high-pressure switch and automatic-reset low-pressure switch.

Refrigerant: R-410A.

Refrigerant Coil:

Copper tube, with mechanically bonded aluminum fins, complying with AHRI 210/240, and with liquid sub cooler.

Fan: Aluminum-propeller type, directly connected to motor.

Motor: Permanently lubricated, with integral thermal-overload protection.

Low Ambient Kit: Permits operation down to 45 deg F (7 deg C).

Mounting Base: Concrete.

Total Cooling Capacity: 35,000 Btu/h.

Condensate Drain Size: 3/4” NPS.

Compressor-Condenser Unit:

Cooling Energy Efficiency 14 SEER Minimum.

Volts: 208/230.

Phase: Three

Hertz: 60.

Minimum Circuit Ampacity (MCA): 21.3.

Maximum Overcurrent Protection (MOP): 35.

EXAMINATION

Examine areas and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

Examine factory-installed insulation before furnace installation. Reject units that are wet, moisture damaged, or mold damaged.

Examine roughing-in for gas and refrigerant piping systems to verify actual locations of piping connections before equipment installation.

Proceed with installation only after unsatisfactory conditions have been corrected.

Any and all pre-work conditions in the furnace area that may be in need of repairs, not caused through the removal and reinstallation of furnace equipment must be brought to the attention of the government prior to commencing work.

INSTALLATION

Install gas-fired furnaces and associated fuel and vent features and systems according to

NFPA 54.

Base-Mounted Units: Secure units to substrate. Provide optional bottom closure base if required by installation conditions.

Anchor furnace to substrate to resist code-required seismic acceleration.

Wiring Method: Install control wiring in accessible ceiling spaces and in gypsum board partitions where unenclosed wiring method may be used. Conceal control wiring except in unfinished spaces.

Install ground-mounted, compressor-condenser components on existing base.

PIPING CONNECTIONS

Install piping adjacent to equipment to allow service and maintenance.

Vent and Combustion-Air Connection, Condensing, Gas-Fired Furnaces: Terminate vent with a cap and in an arrangement that will protect against entry of birds, insects, and dirt.

Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

Plastic Piping Solvent-Cement Joints: Clean and dry joining surfaces. Join pipe and fittings according to the following:

Comply with ASTM F402 for safe-handling practice of cleaners, primers, and solvent cements.

CPVC Piping: Join according to ASTM D2846/D2846M, Appendix.

PVC Pressure Piping: Join schedule number ASTM D1785 PVC pipe and PVC socket fittings according to ASTM D2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D2855.

Slope pipe vent back to furnace or to outside terminal.

Vent and Combustion piping shall be sized according to manufacturer’s recommendations.

Connect refrigerant tubing kits to refrigerant coil in furnace and to air-cooled compressor-condenser unit.

Brazed Joints: Construct joints according to AWS's "Brazing Handbook," "Pipe and

Tube" Chapter, using copper-phosphorus brazing filler metal complying with

AWS A5.8/A5.8M.

Comply with manufacturer’s sizing requirements for installation and joint construction of refrigerant piping.

DUCTWORK CONNECTIONS

Connect ducts to furnace with flexible connector to ensure proper airflow between original ducting and new equipment ducting extensions.

ELECTRICAL CONNECTIONS

Install electrical devices furnished by manufacturer, but not factory mounted, according to

NFPA 70 and NECA 1.

Install nameplate for each electrical connection, indicating electrical equipment designation and circuit number feeding connection.

Nameplate shall be laminated acrylic or melamine plastic signs with a black background and engraved white letters at least 1/2 inch (13 mm) high.

CONTROL CONNECTIONS

Install control and electrical power wiring to field-mounted control devices.

STARTUP SERVICE

Complete installation and startup checks according to manufacturer's written instructions and perform the following:

Inspect for physical damage to unit casings.

Verify that access doors move freely and are weather tight.

Clean units and inspect for construction debris.

Verify that all bolts and screws are tight.

Adjust vibration isolation and flexible connections.

Verify that controls are connected and operational.

Start unit according to manufacturer's written instructions and complete manufacturer's operational checklist.

Measure and record airflows for the government’s inspection.

Verify proper operation of capacity control device.

After startup and performance test, lubricate bearings.

ADJUSTING

Adjust initial temperature and humidity set points.

Set controls, burner, and other adjustments for optimum heating performance and efficiency.

Adjust heat-distribution features, including shutters, dampers, and relays, to provide optimum heating performance and system efficiency.

CLEANING

After completing installation, clean furnaces internally according to manufacturer's written instructions.

Install new filters in each furnace within 14 days after Completion.

FIELD QUALITY CONTROL

Perform the following tests and inspections:

Perform electrical test and visual and mechanical inspection.

Leak Test: After installation, charge systems with refrigerant and test for leaks. Repair leaks replace lost refrigerant, and retest until no leaks exist.

Operational Test: After electrical circuitry has been energized, start units to confirm proper operation, product capability, and compliance with requirements.

Verify that fan wheel is rotating in the correct direction and is not vibrating or binding.

Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

Systems must be tested and demonstrated for the government showing proper operation of heating and cooling operations to include operation and auto functions as set on electronic thermostat.

Verify that vibration isolation and flexible connections properly dampen vibration transmission to structure.

DEMONSTRATION

Train maintenance personnel to adjust, operate, and maintain condensing units.