SOW_-_B1235_Replace_Chiller_&_Water_Heater.pdf

Page | 1

NAVAL AIR STATION FORT WORTH,

JOINT RESERVE BASE

January 8, 2018

STATEMENT OF WORK

REMOVE & REPLACE MAIN 60-TON AIR COOLED LIQUID CHILLER UNIT,

75-GALLON GAS WATER HEATER AND SUPPORTING UTILITIES AT

BUILDING 1235 LOCATED AT NAS FORT WORTH JRB, TEXAS.

Project # DDPM 17 0015

OVERVIEW:

The current 60-Ton Air Cooled Scroll Liquid Chiller Unit located at Building 1235/NAS Fort Worth JRB, Texas is currently experiencing constant unit controls and compressor issues; therefore, requiring a complete replacement. Request that the 75-Gallon Gas Water Heater and supporting components/utilities be replaced since they have also reached the end of their life cycles. The chiller unit shall be sized at 60-Tons Nominal/57.5-Tons Cooling Capacity for this 10,626 Square Foot (SF) facility, and shall be requested in this Statement of Work (SOW).

SCOPE OF WORK:

All approvals and coordination for this scope of work shall be handled by the Contracting Officer (CO). The Contractor is to provide all equipment, material, and labor to perform the following scope of work to remove and replace the main chiller unit, water heater and supporting utilities located at B1235:

Building 1235 – Demolition Phase (60-Ton Chiller Unit, 75-Gallon Gas Water Heater & Supporting Components/Utilities)

1. Disconnect, remove and discard current 60-Ton Air Cooled Scroll Liquid Chiller

Unit. The current chiller is a Trane Model CGAFC604AFA1A0CDF0H000000T0W00S/Serial Number C02B01433 that contains 4 compressors, 6 fans and runs on 460V, 125A, 3-phase, 60 Hz power. The outer dimensions measure 104” in length x 88” in width x 92” in height. Note: It will be the Contractor’s responsibility to transport the current 60-Ton Chiller Unit to an off-base location for disposal or recycling.

2. Remove and discard/recycle one (1) 75-Gallon Gas Water Heater (Rheem Commercial Model G75-125/Serial Number URNG 0102G05027) located in Mechanical Room 139.

Building 1235 – Remove & Replace 60-Ton Chiller & 75-Gallon Water Heater

Page | 2

3. Remove and recycle one (1) 5 horsepower (HP), 460V, 7 Amp, 1725 RPM, 60 Hz chilled water circulation pump motor located in Mechanical Room 139.

4. Remove and recycle one (1) 2 HP, 460V, 3.2 Amp, 1725 RPM, 60 Hz heated water circulation pump motor located in Mechanical Room 139.

5. Remove and discard one (1) 5-gallon expansion tank and 2 lineal feet (LF) of 1 ½” diameter wrapped copper piping located above the 75-Gallon Gas Water Heater in Mechanical Room 139.

6. Remove and discard two (2) 5-gallon pot filter feeders located just to the right of the 75-Gallon Gas Water Heater in Mechanical Room 139. Note: One (1) pot feeder filters the chilled water lines and one (1) pot feeder filters the heated water lines.

7. Demolish and discard 18 LF of 5” diameter aluminum jacketed insulation surrounding the 3” copper water pipes running from the Chiller Unit to the outer surface of the B1235 block wall.

8. Demolish 18 LF of 3” copper water piping running from the Chiller Unit to the outer surface of the B1235 block wall. Note: 3” copper piping contains six (6) 90 degree elbows.

9. Demolish three (3) metal insulated pipe brackets located on the exterior of B1235.

10. Demolish and discard two (2) 5” diameter pressure gauges located on the 3” diameter exterior water pipes.

11. Demolish and discard two (2) thermometers located on the 3” diameter exterior water pipes.

12. Demolish and discard one (1) flow switch located on the 3” diameter exterior water pipes.

13. Demolish and recycle two (2) manual shutoff valves located on the 3” diameter exterior water pipes.

14. Remove all 1/0 copper wiring (60 LF) from Panel MSB/125A Breaker CHLR-1 located in Mechanical Room 139 to the lower base of the existing chiller unit.

15. Remove and recycle 10 LF of 1” diameter rigid conduit the runs from the chiller unit to the exterior block wall and 8 LF of 1” diameter flexible conduit that runs from the chiller unit to the flow switch.

16. Remove and discard 3 LF of 2 ½” diameter flexible conduit that runs from chiller unit concrete pad to the northwest corner of the B1235 chiller unit itself.

17. Remove and recycle 4 LF of 1” black iron gas line, 13’ of 1” copper drain line, 6 LF of 6” metal heat stack and disconnect 120V/20A power in order to remove the 75- Gallon Gas Water Heater.

Page | 3

(See attached B1235 Chiller DEMO Plan for exact locations of the chiller unit, water heater, pumps, expansion tank, pot filter feeders, piping, and panel MSB)

Note: All scrap metal and copper piping shall be transported to an off-base location for recycling. All R-22 contained within the current chiller shall be captured by the Government before the chiller removed and transported off-base for disposal.

Building 1235 – Installation Phase (60-Ton Chiller Unit, 75-Gallon Gas Water Heater & Supporting Utilities)

1. The Contractor shall purchase and install one (1) new standard 60 Nominal

Ton/57.5 Cooling Ton Air-Cooled Scroll Liquid Chiller Unit containing four (4) compressors, six (6) fan motors, two (2) circuits, two (2) coils and R-410A refrigerant. The unit selected shall be rated at 460V, 125A, 3-phase, 4W, 60 Hz.

The maximum fuse size shall be rated at 125 Amps. Note: The current main air handler (AHU-1) located in Mechanical Room 139 is a Trane Model MCCA- Size 030 rated at 14,170 CFM and will not be replaced during this repair project.

2. The Contractor shall purchase and install one (1) new 75-Gallon Gas Water Heater rated at 125 MBH that runs off 120V, 20A power in Mechanical Room 139. The 20A breaker (No. 40) is located in Panel LP (120/208V).

3. The Contractor shall install one (1) new 5 HP, 460V, 7.0A, 3-phase, 1725 RPM, 60 Hz chilled water circulation pump and one (1) new 2 HP, 460V, 3.2A, 3-phase, 1725 RPM, 60 Hz heated water circulation pump in Mechanical Room 139.

4. The Contractor shall install one (1) new 5-gallon diaphragm expansion tank and 2 LF of 1 ½” diameter wrapped Type K copper piping located above the gas water heater within Mechanical Room 139.

5. The Contractor shall install one (1) new 5-gallon pot filter feeder for the chilled water line and one (1) new 5-gallon pot filter feeder for the heated water line within Mechanical Room 139. The Contractor shall supply the Government an additional twenty-four (24) pot feeder filter socks (5 micron) for future filter changes.

6. The Contractor shall install approximately 18 LF of new 3” Type K copper water piping running from the Chiller Unit to the outer surface of the B1235 brick wall.

7. The Contractor shall install approximately 18 LF of new 5” diameter aluminum jacketed insulation surrounding the 3” Type K copper water pipes running from the Chiller Unit to the outer surface of the B1235 brick wall.

8. The Contractor shall install three (3) new 5” metal pipe brackets located on the exterior of B1235.

9. The Contractor shall install two (2) new 5” diameter pressure gauges located on the exterior water pipes.

Page | 4

10. The Contractor shall install two (2) new thermometers located on the exterior water

11. The Contractor shall install one (1) new flow switch located on the exterior water

12. The Contractor shall install two (2) new 3” manual shutoff valves for the exterior water pipes.

13. The Contractor shall run approximately 60 LF (one direction) of new 1/0 copper wiring from Panel MSB/125A Breaker CHLR-1 located in Mechanical Room 139 to the lower base of the existing chiller unit.

14. The Contractor shall install approximately 10 LF of new 1” diameter rigid conduit the runs from the chiller unit to the exterior block wall and approximately 8 LF of new 1” diameter flexible conduit that runs from the chiller unit to the flow switch.

15. The Contractor shall install approximately 3 LF of new 2 ½” diameter flexible conduit that runs from chiller unit concrete pad to the B1235 northwest corner of the chiller unit itself.

16. The Contractor shall run approximately 4 LF of new 1” black iron gas line from the incoming gas line to the 75-Gallon Gas Water Heater within Mechanical Room 139.

17. The Contractor shall install approximately 13 LF of new 1” Type L copper drain line from the 75-Gallon Gas Water Heater to the main floor drain within Mechanical Room 139.

18. The Contractor shall install approximately 6 LF of new 6” diameter metal heat stack from the top of the new 75-Gallon Gas Water Heater to the roof mounted vent stack.

19. The Contractor shall install low ambient controls for freeze protection.

20. The Contractor shall perform a Test & Balance of the entire Building 1235 HVAC system upon completion of the 60-Ton chiller install for maximum cooling efficiency. The Test & Balance report shall be submitted to the CO upon completion. Note: The Government shall supply B1235 Drawing M1.0 for diffuser and return locations.

(See attached B1235 Chiller Install Plan for exact locations of the chiller unit, gas water heater, pumps, expansion tank, pot filter feeders, piping, and Panel MSB)

Note: The new chiller unit, gas water heater, pumps, expansion tank, pot filter feeders and other related material selections shall be approved by the 301st Contracting Office appointed Contracting Surveillance Representative (CSR) before work is to begin. The new chiller unit shall contain an R-410A refrigerant system.

Page | 5

PART I - GENERAL

REFERENCE PUBLICATIONS:

1.1. US GOVERNMENT/US AIR FORCE PUBLICATIONS: US Government/US Air Force publications can be found via internet at http://www.e-publishing.af.mil/. Some suggested publications would include:

1.1.1. 29 CFR (PART 1910), Occupational Safety and Health Standards

1.1.2. 29 CFR (PART 1926), Safety and Health Regulations for Construction

1.1.3. AFI 91-203, Air Force Consolidated Occupational Safety Instructions, 15 Jun

1.2 NATIONAL INSTITUTE OF BUILDING SCIENCES (NIBS): The NIBS operates a website called the Whole Building Design Guide (WBDG) and it can be found via internet at http://www.wbdg.org/. Some suggested Unified Facilities Criteria’s (UFCs) would include:

1.2.1. UFC 4-010-01 DOD Minimum Antiterrorism Standards for Buildings, Change 1, 1 Oct 2013

1.2.2. UFC 3-410-01 Heating, Ventilating, and Air Conditioning (HVAC) Systems, Change 4, November 2017

1.2.3. UFC 3-550-01 Exterior Electrical Power Distribution, Change 1, 23 Mar 2017

PART II - PRODUCTS

2.1. MATERIALS:

2.1.1. All material selected to accomplish this Statement of Work shall be of good quality and intended for Commercial use. Items shall be of the proper type, size, and material for the use intended.

2.1.2. Contractor Furnished Materials: The Contractor furnished materials shall include all associated equipment and appurtenances required for performing the work in accordance with the equipment manufacturer’s literature.

PART III – EXECUTION

3.1. WORK REQUIREMENTS:

3.1.1. Scheduling and Coordination: Before commencing work, the Contractor shall ensure that he/she is complying with the approved schedule, that work commences in accordance with the issued Notice to Proceed, and that work is coordinated with the assigned CSR. The Contractor shall further determine that all http://www.e-publishing.af.mil/ http://www.wbdg.org/

Page | 6 required notices have been given and permits obtained.

3.1.2. Scheduling and Sequence of Work: The work shall be performed in such a manner as to minimize interference with the normal daily work of the Government activity. Certain areas of the facility shall be vacated as necessary, in order for the Contractor to perform the required work. Prior to beginning work, the Contractor shall meet with the CSR so that the planned sequence of work and/or schedule may be reviewed and approved.

3.1.3. Interruption of Utilities Services: Interruptions shall be kept to a minimum and may only occur at such times and duration as approved by the CO. All utility interruptions shall be reviewed and accepted by the CSR before approval is provided.

Currently NAS Fort Worth JRB Public Works requires fourteen (14) days prior notification for a Utilities (Water, Gas, and Minor Power) Shutdown. Major Power Outages require twenty-eight (28) days prior notification.

3.1.4. Material, equipment, tools, and workmen shall be scheduled on the site in a timely manner to avoid delay in work. Items of material shall be inspected to make certain they are in compliance with the specifications and are free from defects and damage.

3.1.5. Measurements: Before the chiller unit, water heater and supporting utility replacement operations are to begin, obtain necessary field measurements and verify all measurements.

3.1.6. Existing Work: The Contractor shall take measures to protect any existing work or property belonging to the government which is to remain in place in the work area. The Contractor shall be responsible for repairing or replacing any government property that is damaged during the performance of the contracted work. Failure to do so shall result in the government withholding contract funds in order to effect required replacement or repairs.

3.1.7. Facilities: The Contractor shall protect electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities.

3.1.8. Dust and Debris Control: The Contractor shall prevent the spread of dust and debris to the surrounding buildings and avoid the creation of a nuisance or hazard in the surrounding area. Non-hazardous debris resulting from the work being performed shall be cleaned up daily.

3.2. PERFORMANCE:

3.2.1. Workmanship: Skilled personnel shall execute in a careful, neat, and proficient manner and in compliance with accepted trade practices and prevailing industry standards. All work, including any required design, shall be executed in accordance with OSHA standards, and specifically 29 CFR 1910 and 29 CFR 1926. All work on this contract shall comply with all Local, State, and Federal Environmental Laws.

Page | 7

3.2.2. As used herein, “replace” means provide new materials to replace existing or missing materials.

3.2.3. Minor Materials and Work: Minor materials and work not specifically mentioned herein but necessary for the proper completion of the specified work shall be furnished without additional cost to the Government.

3.2.4. Unforeseen Major Repairs: Should deteriorated materials of a major nature be uncovered in the course of the work, it shall be brought to the attention of the CO and CSR. Repairs shall be made as directed by the CO, in writing, and an adjustment will be made in contract price in accordance with the terms of the modifications.

3.2.5. Existing Work: Where existing work is changed or removed, or where new work adjoins, connects to, or abuts existing work, the existing work shall be altered as necessary and connected in a substantial and workmanlike manner. All new work shall match, as nearly as practicable, existing, adjoining, and/or adjacent similar work.

Operations affecting existing work shall be conducted with care not to damage work in place, and all existing work damaged by such operations shall be rectified or replaced without additional expense to the Government.

3.3. REQUIRED FINAL SUBMITTALS:

3.3.1. Per UFGS 01 78 00, Section 1.7.1, the Contractor shall “assemble approved information in a binder and turn over to the Government upon acceptance of the work.”

The Government will also accept electronic versions of the warranty binder. Binder or CD label should include Building Number, Contract Number, and Contract Name.

Binder or CD shall contain the following items:

3.3.1.1. Name of the item(s)

3.3.1.2. Model and serial numbers

3.3.1.3. Location where installed

3.3.1.4. Name and phone numbers of manufacturers or suppliers

3.3.1.5. Names, addresses, and telephone numbers of sources of spare parts

3.3.1.6. Warranties and terms of warranty. Include one-year overall warranty of construction, including the starting date of warranty of construction. Items which have extended warranties must be indicated with separate warranty expiration dates.

3.3.1.7. Cross-reference to warranty certificates as applicable

3.3.1.8. Starting point and duration of warranty period

3.3.1.9. Summary of maintenance procedures required to continue the warranty in force.

3.3.1.10. Cross-reference to specific pertinent Operation and Maintenance manuals.

3.3.1.11. Organization, names and phone numbers of persons to call for warranty service.

3.3.1.12. Typical response time and repair time expected for various warranted

Page | 8 equipment.

3.3.1.13. All Operation & Maintenance manuals

3.3.1.14. All preventative maintenance plans

PART IV: OTHER REQUIREMENTS

4.1. SCHEDULE:

The Contractor shall provide a Construction Schedule for CO approval. Work will be accomplished during normal Base operating hours, approximately 0730-1630 hours, Monday-Friday. No work will be scheduled on weekends without prior written approval by the CO, and concurrence of the CSR.

4.2. IDENTIFICATION OF EMPLOYEES:

The Contractor shall be responsible for furnishing to each employee, and for requiring each employee engaged on the Work to display, identification as approved and directed by the CO. Prescribed identification shall immediately be delivered to the CO upon release of any employee. All Contractor and Sub-Contractor personnel shall wear identifying markings on hard hats clearly identifying the Company for whom the employee works.

4.3. JOB SITE TOOLS AND EQUIPMENT:

All hand tools and equipment shall be maintained in good working order and properly stored when not in use. Construction attire shall be in accordance with applicable OSHA regulations.

4.4. SANITATION:

Government toilet facilities shall not be available to Contractor personnel. The contractor shall provide portable toilets at the job site for Contractor personnel.

4.5. CLEANUP:

At the end of each Working day, the Contractor shall clean up the Work Site by the removal of all construction debris, waste materials, packaging material, and the like.

All construction waste shall be stored in appropriate size dumpsters, and covered in order to keep contents inside. Cleanup of the Work Site shall include the construction site and any other adjacent areas that have been affected. Any dirt or mud which is tracked on to any Base street, parking area, sidewalk, patio, or driveway shall be cleaned away daily. This clean-up procedure does not apply to the generated universal waste

Page | 9

4.6. OCCUPATIONAL SAFETY:

The Contractor shall be subject to No Notice Inspections under Occupational Safety and Health Act (OSHA) Program by Inspectors of the Department of Labor.

4.7. GENERATED REFUSE:

The Contractor shall take positive action to prevent Work generated refuse from entering the sewer system. The Contractor shall use contractor provided approved waste containers. All refuse and waste material shall be hauled in trucks with tight fitting beds and covers to prevent spillage on roadways. The Construction Site shall be kept neat, orderly, and safe for Workmen at all times.

4.8. RECYCLABLE MATERIAL:

The Contractor shall recycle all metals removed from B1235 at either the NAS Fort Worth JRB, Texas recycling center or an off-base recycling center. The amount of recyclable material and solid waste from demolition operations shall be documented on a Waste Tracker Form and submitted to the CO at the conclusion of the project.

4.9. SCHEDULE OF SUBMITTALS:

Contractor Furnished Materials. The Contractor shall submit to the CO for approval a detailed list of the Manufacturer’s data on the Contractor furnished materials. The CO may request Drawings and Descriptions indicating the quality and fitness for the intended application.

The Contractor shall provide submittals per attached schedule to the CO for approval including but not limited to the indicated items.

4.10. SITE VISITATION:

Prior to submitting proposals, it is highly recommended that prospective contractors visit the site in order to satisfy themselves as to the nature of the project site, details, character, and amount of work to be accomplished. The Contractor is responsible for the verification of all statement of work details, critical measurements, drawing specification and dimensions, etc., prior to preparation of their proposal, ordering of materials, and execution of work. Failure to attend a site visit shall not relieve the contractor of responsibility for being knowledgeable of those conditions that can only be readily observed by attending a site visit.

Site visitation may be arranged by the CO.

4.11. TIME OF COMPLETION:

The Contractor shall submit a planned performance period for review and acceptance by the Government.