Attachment 1- Statement of Work.pdf

Scope of Work and Specifications

For

HMF Hangar 2, Bay 4

HVAC Replacement Project

Located at

U.S. Coast Guard Base

Elizabeth City, N.C.

March 2021

Commanding Officer

United States Coast Guard

Base Elizabeth City

Facilities Engineering Department

Elizabeth City, N.C. 27909

Prepared By Mark Croley Facilities Engineering Department USCG BASE Elizabeth City

SCOPE: Contractor shall provide all supervision, labor, equipment, parts and materials necessary to replace one failed HVAC system. This HVAC unit is rated at (40) tons of cooling capacity.

The existing split type system has had multiple compressor failures and was designed for refrigerant 22. This project requires the existing remote condensing unit, existing interconnecting refrigerant piping, and existing evaporator coils be replaced with new equipment that is designed for Refrigerant 410A.

This work is located at USCG Base Elizabeth City, NC at the Heavy Maintenance Facility (HMF), Hangar 2, Bay 4.

2. GOVERNMENT FACILITIES AND UTILITIES: Electrical power is available on the site. The Contractor will be permitted to utilize these utilities in performing the work, provided that the existing systems are not overloaded. Telephone services will not be available for use by the contractor.

3. MATERIALS AND LOCATIONS:

a. Materials shall be delivered to the jobsite in their original unopened packages, clearly marked with the manufacturer’s name, brand name, and description of contents. Storage shall be in accordance with manufacturer’s recommendations in a clean, dry, well-ventilated area. Stored materials shall be protected from sunlight, and kept away from excessive heat. Insulation board shall not be exposed to flame or other ignition sources. The contractor shall not store any highly flammable materials in the work area. Sufficient area for staging is available on site; storage areas will be pre-approved by the Contracting Officers Representative (COR). Special precautions shall be taken to ensure construction materials and debris does not enter the airfield, runways, or taxiways.

b. The Contractor is required to comply with local VOC laws and regulations. All applicable Material Safety Data Sheets shall be available upon request.

4. SCHEDULE OF WORK: Completion of work shall be accomplished within 30 calendar days from acceptance of submittals. The Contractor shall perform all work during normal base work hours. The base normal working hours are 7:00 am to 4:30 pm, Monday through Friday, but the contractor is not limited to these hours. If the contractor is going to work outside normal working hours, permission must be obtained from the COR (Mark Croley, 252-335-6569).

5. EXISTING CONDITIONS: The contractor is expected to satisfy himself as to the existing conditions and the work to be performed. The contractor shall verify all dimensions and equipment data prior to ordering materials and commencement of work. A site visit should be arranged with Mark Croley by email at Mark.E.Croley@USCG.mil

6. LIABILITY OF CONTRACTOR: Any damage to government property caused by the contractor shall be repaired or replaced by the contractor at no cost to the government. The contractor shall not disconnect any service without approval from the COR.

7. INSPECTION AND ACCEPTANCE: The COR will accomplish inspection and acceptance of work.

8. LABOR LAWS: The Service Contract Act (SCA) applies to the procurement.

9. SAFETY: The Contractor is wholly responsible for work site safety. The

Contractor shall implement a safety program that protects the lives and health of personnel in the construction area, prevents damage to property, and avoids work interruptions. To accomplish this end, the Contractor shall provide appropriate safety barricades, signs, signal lights, etc. as well as complying with the requirements of all Federal, State and Local safety laws, rules and regulations.

10. SITE RESTORATION & CLEAN UP: The work site shall be cleaned up at the completion of each workday. Contractor shall take special care to contain dust while working. Upon completion of the job, the Contractor shall clean up the job site, returning it to a state of cleanliness equal to or exceeding that in which it was found. The Contractor shall properly dispose of any trash, extra materials, dirt, debris, or other litter that remains. There will be no final acceptance of the contract until the Contracting Officer’s Representative approves the appearance of the job site.

11. GOVERNMENT FACILITIES AND REGULATIONS: The Contractor, their employees, and any sub-contractors shall become familiar with and obey all Base/ Unit regulations. All personnel employed on the project shall keep within the limits of the work area, and shall not enter any other area outside of the work site unless to do so in the performance of their duties. There shall be No Smoking in any Coast Guard Building.

12. CONTRACTING OFFICER’S REPRESENTATIVE: The Contracting

Officer’s Representative (COR) will be designated at the notice to proceed.

13. Submittals: Once contract is awarded, the following list of submittals required for approval to proceed. The submittals shall contain sufficient information that can be used to determine compliance of the equipment and/ or materials with these specifications and referenced specifications.

I. Condensing Unit II. Evaporator section/ module

III. Firewall pipe penetration assemblies IV. Refrigerant pipe V. Refrigerant piping plan

VI. Work Delivery Schedule

14. CONTRACT TIMELINE: The Contractor shall provide all required information and complete this contract within this time schedule, unless approved by the Contracting Officer.

a. Provide all required submittals to the Contracting Officer within 14 calendar days after contract award.

b. The U.S. Coast Guard will have 7 calendar days to review the submittals and respond to Contractor.

c. Contractor shall provide projected delivery schedule during proposal and provide a firm delivery date within 14 calendar days after the contract has been awarded.

d. The Contractor, upon receiving notification that the U.S.

Coast Guard has approved the submittals and having received the Contractors firm delivery date schedule, will have 14 Calendar days to begin work on the project and have the project completed within 21 calendar days. The Contractor shall notify the Contracting Officer of any long lead time delivery of equipment, so that the Contracting Officer can modify the delivery date of the contract.

15. REFERENCES & ATTACHMENTS (Pages 9 thru 17 of this document)

a) Photos of existing equipment

b) Photos of existing equipment data plates

Technical Requirements

1. General:

The contractor shall provide all supervision, labor, equipment, parts and materials necessary to demo/ remove one (1) existing air cooled air conditioning condensing unit, refrigerant piping, evaporator coil and install new replacement air cooled condensing unit equipment, evaporator refrigerant piping, electrical and control wiring. The Contractor is to provide and install any and all parts necessary to fully install this HVAC system and make fully functional.

The Existing failed equipment is as follows:

Condensing Unit: `

Carrier

Model: 38AKS044-601

Serial: 1108Q08578

Voltage: 460 volts/ 3 Phase/ 60 Hertz

Air Handler/ Evaporator Unit

Industrial Commercial Equipment Manufacturing LTD

Model: AC-148

Serial: 03087125B2

Contractors shall install this equipment in accordance with North Carolina Mechanical and Building codes as well as the equipment manufacturers’ requirements.

Contractor shall provide all electrical devices and qualified electricians to install the necessary electrical power and to re-route the existing electrical wiring to the new equipment locations, including the service electrical disconnect.

The Contractor shall relocate the existing electrical disconnect and extend the electrical circuit wiring and conduit along the same exterior wall to the service end of the new condensing unit in accordance to the National Electric Code (NEC). Relocation of this electrical service disconnect switch is necessary due to insufficient clearances.

The Contractor shall provide and install the correct size and type circuit breaker/ fuses as required by the equipment data plate.

The Contractor shall be responsible to remove the existing equipment and materials from the Base.

The Contractor shall be responsible for any wall openings necessary and sealing thereof, and using approved factory manufactured Fire Rated Penetration sleeves for all wall penetrations.

The Contractor shall provide and install all control wiring necessary to make this new equipment operational with the existing control system. Any and all control wiring shall be routed through conduit for protection.

The Contractor shall insulate the entire length of refrigerant gas (Suction) piping with closed cell type such as “Rubatex” that has a ½ inch wall thickness.

The Contractor shall provide and install new evaporator coils and condensate drain pan that precisely fits and meets the existing equipment manufacturer’s specifications.

The Contractor shall provide and install new PVC (schedule 40) condensate drainage piping, using only factory formed traps, DWV type drainage fittings and insulated with closed cell type pipe insulation, such as “Rubatex” that has a minimum 3/8” inch wall thickness. The condensate drain piping shall be routed to the existing floor drain located next to the air handler unit.

The Contractor shall position the equipment so that all equipment access panels are fully accessible for routine maintenance and repair.

The Contractor shall provide and install (Qty 4) 4 inch schedule 40 steel pipe bollards 48 inches tall with a 4 bolt mounting plate welded to the bottom. The bollards shall be painted safety yellow and anchored to the concrete with wedge anchors bolts. The bollards shall be placed on the parking lot side of the condensing unit, one at each corner and the remaining two evenly spaced along the length of the unit.

The Contractor shall provide and install the new refrigeration piping system in accordance with the equipment manufacturers recommended system design, included in this refrigerant piping design shall include liquid line solenoid valves, correct piping sizes to maintain proper oil return and refrigerant velocity, isolation ball valves, pressure test fittings, liquid line sight glass, shell & replaceable core type liquid line filter dryer, riser traps to allow for proper oil return and refrigerant accumulator.

The Contractor shall provide and install new air cooled air conditioning condensing equipment that is rated at 40 nominal tons (480,000 BTU’s) of cooling capacity. This equipment shall operate at 460 volt, three phase (460 volt/ 3 phase/ 60 Hz). The refrigerant type shall be 410A.

The condensing unit shall also include the following options:

a. Controls for low ambient temperature operation

b. High and Low refrigerant pressure controls

c. Refrigerant oil pressure control

d. Coil guards

e. Compressor unloading controls for capacity control

The Contractor shall recover any refrigerant in accordance with EPA requirements and provide documentation to the COR (Contracting Officers Representative)

The Contractor shall provide all equipment and parts literature and OEM manuals to the COR with all warranty information completed. The Contractor shall also install a label stating the warranty start date and end date on equipment.

The Contractor shall provide complete warranty coverage for this project for a period of one (1) YEAR beginning when the USCG accepts the final inspection of this project.

The Contractor shall remove the existing suspended ceiling and related grid work to accomplish this project, including any lighting fixtures or other incidental items that may be required to be removed to accomplish this project. The Contractor shall reinstall the suspended ceiling system and light fixtures upon completion of the project.

The Contractor shall NOT perform any “Hot Work” activities (i.e. burning, welding, cutting, brazing, soldering, using fire or spark producing tools, etc.) Without prior approval by the COR and a “Hot Work” permit issued by the Base Fire Inspector.

The Contractor shall provide a detailed work schedule and a list of qualified & certified personnel who will be performing the work.

The Contractor shall follow industry best practices and perform all work in accordance with (IAW) all Federal, EPA, OSHA, and State of North Carolina laws and regulations.

The Contractor shall provide and install Refrigeration grade copper pipe and fittings for all refrigerant piping. All pipe joints shall be brazed with a minimum of 15% silver bearing stick type solder. The Contractor shall flow nitrogen gas through the refrigerant piping during all brazing procedures, to prevent scaling.

The Contractor shall install and maintain “yellow Safety tape” around the perimeter of the work area to warn away unauthorized access to the work site.

2. Operational testing and start-up shall be conducted to verify proper operation of equipment.

3. Installation, operation, maintenance manuals and warranty information for the equipment and system components shall be turned over to the COR upon project completion. The COR and applicable Coast Guard personnel shall witness operational tests.

4. TESTING AND INSPECTION:

The Contractor shall notify the Contracting Officer’s Representative (COR) 5 days before the performance, inspection and acceptance tests are to be conducted. The tests shall be performed in the presence of the COR.

5. EXECUTION:

Installation, workmanship, fabrication, assembly, erection, examination, inspection and testing shall be in accordance with appropriate sections of

29 CFR 1910, 1926.

REFERENCES & ATTACHMENTS

Condensing Unit #76 Data Plate

Condensing Unit #76

Condensing unit #76

Note equipment electrical disconnect switch to be relocated closer to new unit service access panel with required National Electric Code (NEC) clearances.

Hanger 2- Bay 4 Air Handler Data Plate

Hanger 2- Bay 4 Air Handler (front view)

Hanger 2 Bay 4 Air Handler (side view)

Hanger 2 Bay 4 Air Handler

Evaporator Section

Condensing Unit #76 Electrical Service Disconnect Switch

Condensing Unit #76 Electrical Service Disconnect Switch