SOW-_KEY-HVAC_Repairs_v2.docx

HVAC Repairs

Florida Keys Weather Forecast Office (WFO) 1315 White Street Key West, FL 33040

STATEMENT OF WORK

April 11, 2019

EXISTING CONDITIONS

Existing HVAC system at the Weather Forecast Office (WFO) in Key West, FL, has systemic system malfunctions from the 2017 Hurricane Season.

SCOPE

The National Weather Service (NWS) solicits interested and qualified private and commercial vendors to submit proposals for entering into agreement for the purpose of furnishing, and installing the services specified under this request for proposal. The contractor is to provide all labor, tools, equipment, hard ware and consumables to furnish and install a fully integrated and functional system.

The NWS expects a “turnkey” solution for this project. The awarded contractor shall, furnish, engineer, fabricate, install, and test a complete and operational system. All materials and equipment shall be new and of the latest technology available at the moment. Installation, service and maintenance shall be performed by personnel skilled in the installation of air conditioning system. Bidders shall provide all necessary certifications. New equipment must be compatible with existing air conditioning and Building Automation System to remain.

Refer to Appendix A for testing and inspections performed to the existing system

Task-1:

a) Replace all three existing 10 Tons Condensing Units (CU) for Trane Split system # CU-2A, CU-2B & CU-2C (total of 3). Remove and dispose existing refrigerant and install new R-410A refrigerant to all units, flush existing system with a refrigerant flushing solution. Replace filter dryers

b) Replace existing 20 Tons Condensing Units for Trane Split system # CU-1 (total of 1). Remove and dispose existing refrigerant and install new R-410A refrigerant, flush existing piping. Replace filter dryers

c) Add necessary controls for Building Automation System (BAS) to monitor and control new units.

d) Install a power phase monitor for all units to protect them from power surges, outages and loss of phase.

e) Replace all insulation on CUs refrigerant lines with a UV rated insulation or wrap.

f) Properly secure new units to deck using NOA per local code with stainless steel or hot galvanized, hurricane rated tie downs.

g) Factory installed saltwater corrosion coating on all CU’s.

h) Provide new NEMA-3R fusible disconnects on concrete wall by CUs, provide spare fuses for three full changes.

Note: Existing Condensing Units are located inside the mechanical yard on the second floor, under a roof top metal cage. Contractor will have to remove and reinstall the roof top metal cage, and possibly the metal beams, to replace existing CUs. A crane will be required to remove the metal cage/beam and handle new and existing CUs.

Task-2:

a) Replace both 10 Tons Condensing Units for Liebert PAC units #1 and 2 (total of 2). Add refrigerant as needed, flush existing piping if needed.

b) Add necessary controls for Building Automation System (BAS) to monitor and control new units.

c) Install a power phase monitor for all units to protect them from power surges, outages and loss of phase.

d) Replace all insulation on CUs refrigerant lines with a UV rated insulation or wrap.

e) Properly secure new units to deck using NOA per local code with stainless steel or hot galvanized, hurricane rated tie downs.

f) Factory installed saltwater corrosion coating on all CU’s.

g) Install an air scrubber to minimize salt intake into the condenser system.

h) Provide new HVAC rated disconnect on concrete wall by CUs.

Note: Existing Condensing Units are located inside the mechanical yard on the second floor, under a roof top metal cage. Contractor will have to remove and reinstall the roof top metal cage, and possibly the metal beams, to replace existing CUs. A crane will be required to remove the metal cage/beam and handle new and existing CUs.

Task-3:

a) Install an additional air flow sensors for each AHU to be use by the BMS as AHU status input to command compressors on.

Task-4:

a) Replace or refurbish existing Air Handler Units AHU-1, 2A, 2B and 2C (total of 4) (note: Refurbishment of the Air Handler Units will be considered only if the vendor provides a technical approach. Vendors are encouraged to provide two separate quotes for Task 4, one for replacement and one for refurbishment)

b) Remove and reinstall partition wall /interior wall to provide enough access space to replace the units.

c) Provide duct wrapping of all areas of duct that need to be altered in order to remove the units.

d) Connect new units to BAS

e) Provide ducted temporary Air Conditioning during unit replacement

f) Provide new stand for all units

g) Provide a plastic, floor condensate collector tray under AHU-1, and under AHU 2A, 2B and 2C (one for all three) to collect any water leak from the AHUs. Make tray big enough to catch any water leak coming from the units. Pipe tray to closest floor drain. Install tray to not obstruct walking corridors.

h) Replace or refurbish existing AHU condensate piping.

i) Work with NWS TAB agent 5D for the duration of the project

j) Work with NWS commissioning agent 5D for duration of project.

k) If quoting a refurbishment of the AHUs, please include replacement of blower wheels and expansion valves in the AHUs to your pricing.

Task-5:

a) Refurbish all existing VAV boxes (Total of 13). VAV boxes will not be replaced, only the elements specified below.

b) Replace all heating elements of all VAV boxes EDHs, recalculate to assure proper size. Replace all safety/reset switches, and sensors associated with the EDH. Calibrate all sensors so they work with the existing controls.

c) Clean all VAV boxes

BID SCHEDULE

All tasks shall be bid as separate line items. NWS Reserves the right to exercise one or more of the bid options

GENERAL REQUIREMENTS

1) All exterior equipment, fittings and hardware shall be marine grade stainless steel or hot-dip galvanized.

2) Contractor shall be responsible for restoring work site to original condition.

3) All material and equipment shall be new and of the latest technology, and compatible with existing equipment.

4) The Contractor shall comply with all local, state, and Federal environmental, health, and safety regulations while conducting this work. In addition, the Contractor shall ensure that all work is in compliance with the applicable codes.

5) All work contained in this Statement of Work shall be completed in a professional and workmanlike manner, per manufacturers' specifications and requirements and in accordance with industry standards and practices, and in accordance with the latest edition of Local, State and Federal regulations.

6) Disposal. Unless specified otherwise by the Government, the Contractor will be required to properly remove and dispose of all construction and/or demolition waste material in accordance with Local, State and Federal waste disposal regulations.

7) All Bidders are strongly encouraged to attend a site visit to inspect all proposed replacement work and to acquire all necessary site information to properly prepare their bid proposal. Failure of the Contractor to attend a site visit and acquire all necessary site information to properly prepare their Bid Proposal shall not be acceptable cause to justify a later request for additional costs after Contract Award. All technical questions must be in writing and sent to the NOAA Contracting Officer.

8) Provide verification of all system operations.

WORK SITE

Florida Keys Weather Forecast Office 1315 White Street Key West, FL 33040

PROJECT WARRANTY

Contractor shall provide a written warranty for the workmanship for a period of (1) one for year from the date of acceptance unless otherwise specified.

POINT OF CONTACTS:

Site POC, Dan Milner 305-295-1316, dan.milner@noaa.gov William Martinez, 305-632-2477; William.martinez@noaa.gov COR Matthew DeGeorge, 682-703-3737, matthew.degeorge@noaa.gov

INVOICING INSTRUCTIONS

The language below shall be incorporated into Invoicing Instructions Invoicing and Progress Report (Bipartisan Budget Act of 2018)

d. Progress report requirements: If progress reports are required, each report shall identify the BBA supplemental funded CLIN number along with the description of accomplishments for the reporting period. Similar to the invoicing requirements, if multiple CLINs are listed in the contract schedule, the work must be broken out by CLIN with the “BBA Funded” designation for those CLINs funded with BBA supplemental funds.

STANDARD CLAUSES

A. Compliance.

The Contractor shall comply with all local, state, and Federal environmental, health, and safety regulations while conducting this work. In addition, the Contractor shall ensure that all work is in compliance with the applicable codes and be responsible for all licenses, permits and fees required to complete this project.

B. Disposal.

The Contractor will be required to properly remove and dispose of all waste material in an environmentally friendly manor.

C. Guidelines.

The Project shall follow the guidelines stated in the Statement of Work, site diagrams, blueprint, and any contractor provided quoted documents. All modifications must be submitted and approved by the Contracting Officer.

D. Hours of Operation.

Work shall be performed between 7:00am & 5:00pm Monday thru Friday unless otherwise approved by the COR. Contractor agrees to observe all Federal Holidays, and any other day off work designated by Federal Statute, Executive Order, or Presidential Proclamation:

New Year’s Day, Labor Day, Columbus Day, Veteran's Day, Thanksgiving, Christmas, Memorial Day, Presidents Day, Independence Day & Martin Luther King Day.

E. Government Contact.

The Contracting Officer Representative (COR) will serve as the Government’s point of contact for all submissions.

F. Documents.

The Government does not warrant that any documents provided as attachments to be free from discrepancies, ambiguities, errors, omissions, or changing conditions. It is the responsibility of the Contractor to confirm existing conditions and resolve discrepancies between documents.

G. Project Duration Project shall be completed within 120 days of notice to proceed.

H. Davis Bacon Act.

The Contractor shall comply with the current wages of the Davis- Bacon Act.

SAFETY AND EMERGENCY PLAN:

GOVERNMENT PROVIDED MATERIALS AND/OR SERVICES

A. EXCLUSIONS:

Unless otherwise indicated elsewhere in this SOW, the Government will provide no data, materials, equipment and/or services to the Contractor. Any and all research required to fulfill the SOW described herein, shall be the responsibility of the Contractor. The Government retains the right to request the Contractor to acquire additional information on behalf of the Government.

B. WARRANTY:

The Government does not warrant that any documents provided as attachments to be free from discrepancies, ambiguities, errors, omissions, or changing conditions. It is the responsibility of the Contractor to confirm existing conditions and resolve discrepancies between documents.

***All submittals shall become the property of the U.S. Government***

Appendix A “Tests and Inspections of existing system”

Results from NWS Inspection of System Table 1 Inspection Findings Finding Findings

Table 2

VAV Functional Analysis

Notes from Table 2:

1. When the EDH was overridden to the on position the discharge air temp leaving the VAV did not increase. This indicates the EDH is not working

2. This EDH has two electrical heating strips and only one is operational

3. The EDH was locked off in the program. However, when the EDH was released to normal operation it fails to operate.

4. The VAV damper is at 100% open however the CFM flow is only 577 CFM. The flow should be at 1425 CFM under high loads conditions this VAV will not perform to design conditions causing the space to be hot.

5. The Min heating CFM that is programed into the controller is 100 CFM. The design CFM is 1915. This low CFM will cause the heater to not heat and possible burn.

6. Both stages of heat were locked off in the VAV controller program. However, the EDH did not operate when the lock was released. The heating Min CFM was set at 100 CFM. The design Min CFM is 1276. The low CFM setting has caused the EDH not to work because not enough CFM is available to remove the heat from the heater strips thereby causing the heaters to overheat and burn or trip the safeties.

Table 3 Air Flow Analysis

(See below table)

Notes from Table 3:

1. The original design Max flow is 1300 CFM and the Min design CFM flow is 780 CFM.

2. The original design Max CFM flow is 1825 CFM and the Min design CFM flow is 1095 CFM.

3. The original Min design flow is 1915 CFM

4. The original Min design flow is 1275 CFM

END OF STATEMENT OF WORK

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