(SOW) ZFW ARTCC_Chiller Refrigerant Monitor.pdf

August 5, 2024

ZFW REFRIGERANT MONITOR REPLACEMENT

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STATEMENT OF WORK

ZFW ARTCC

AUGUST 1, 2024

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL AVIATION ADMINISTRATION

ZFW SSCM: Chris Birch, christopher.birch@faa.gov 817-858-7465

ZFW SSC Coordinator: Steve Holder, Stephen.Holder@faa.gov 817-858-7442

TABLE OF CONTENTS

SECTION 1A – GENERAL REQUIREMENTS

SECTION 1B - SPECIAL REQUIREMENTS

SECTION 1C – HIGH LEVEL SCOPE OF WORK

SECTION 1D – REFRIGERANT DETECTION EQUIPMENT SPECIFICATION

mailto:christopher.birch@faa.gov mailto:Stephen.Holder@faa.gov

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SECTION 1A – GENERAL REQUIREMENTS

1A.1 Summary of Work.

The Contractor is required to furnish all labor, materials, services, equipment, tools, and insurance to remove and replace the refrigerant monitor in the Chiller room B115 located in the basement of the

Administration Wing of the Fort Worth Air Route Traffic Control Center (ZFW ARTCC) located at 13800

FAA Blvd, Fort Worth, TX 76155. This will include procurement of a new refrigerant leak monitoring system, disconnection and disposal of the existing Chillgard RT refrigerant monitor, and installation of the most current version of an equivalent refrigerant leak monitor. The latest version from MSA is the

Chillgard 5000 but contractor may submit an equivalent from other manufacturers for approval.

The contractor will coordinate with ZFW Tech Ops for the shutdown of the electrical circuit feeding the existing refrigerant monitor and provide a lockout/tagout device. The circuit shall remain locked out throughout the duration of the replacement process. The contractor will disconnect the incoming power and sensor feeds at the existing monitor and disconnect the three incoming conduits from the monitor enclosure.

The contractor will evaluate and determine if any adaptors or fittings will be required to attach to the new monitor enclosure and, if so, will provide these fittings, adaptors, or other hardware as an incidental cost to the project. Upon removal of the unit, contractor will coordinate with FAA Tech Ops if it is to be turned over. If not turned over to the FAA it is to be disposed of by the contractor. The contractor will mount the new monitor and connect the existing power and sensor wires. After all connections are made the contractor will remove the lockout/tagout device, power-up the monitor, and perform calibration and testing per the manufacturer’s specifications.

A contractor site walk-through is suggested prior to proposal preparation. Additions and deletions from this scope of work can be made based upon data gathered during the site walk through upon FAA approval.

Advise that the ARTCC will remain operational 24/7 during all project work. The work performed will not impact AT operations as construction activity will be coordinated via a pre-construction meeting, either in person or virtual, which is to be conducted a minimum of two weeks prior to the scheduled start of construction. At the time of the pre-construction meeting a complete construction schedule is to be submitted.

1A.2 Background.

The existing Chiller Refrigerant Monitoring System at ZFW is the Chillgard RT model, which has reached obsolescence and has been discontinued by the manufacturer, MSA Safety.

1A.3 Action Plan.

This project will provide for the replacement of the obsolete refrigerant monitor with either the newest model from the same manufacturer or an approved equivalent monitor from a different manufacturer.

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SECTION 1B – SPECIAL REQUIREMENTS

1B.1 Coordination.

1. All contracts between the contractor and ZFW ARTCC shall be coordinated through the FAA’s designated Contracting Officer (CO).

2. Contractor shall be always escorted by ZFW ARTCC designated FAA Contracting Officer Representative (COR) or Point of Contact (POC) and/or Technicians.

3. Contractor shall coordinate with FAA Technicians for setup and/or lock out of electrical and all utility services, as well as interface with any FAA equipment or cabling (as applicable).

4. Immediately on discovery of the need for additional information or interpretation of the contract documents, contractor shall prepare and submit an RFI (Request For Information) in the form specified to the designated FAA COR/POC and/or Technicians.

5. Air Traffic Control Safety: Contractor shall perform all work in a manner which does not conflict with, or adversely affect, the air traffic operational environment. In the event of any actual or potential conflicts, air traffic activities shall have priority over all construction activities.

6. All work must be accomplished by experienced workers in accordance with the highest standards of the various work trades involved. Workers must abide by safety requirements, set forth by OSHA, that correspond to the type of work being performed.

1B.2 Pre-Construction Conference.

As soon as practical after the award of the contract, the Contracting Officer will set a date for a preconstruction conference between the representatives of the Government (applicable ZFW managers and personnel will be invited to attend) and the contractor. This conference will be either virtual or at a location agreed upon by the CO and the contractor. The contractor shall attend the conference and shall abide by all agreements reached at the conference regarding:

• Detailed procedures for administration of the project.

• Identity of the ZFW COR/POC and/or Technicians, authorized representatives of the

Government/Contracting Officer, and the contractor’s superintendent(s).

• Exchange of telephone numbers and email information.

• Detailed procedures for submittals:

o Contractor shall submit list of materials for FAA approval prior to the commencement of construction.

o In making a formal request for substitution, the contractor represents that they have investigated the proposed product and have determined that it is equal to or superior in all respects to that specified.

o Contractor shall submit a construction schedule which shall be approved by FAA prior to construction.

o Operations and Maintenance (O & M) Manuals: Contractor shall submit all manufacturer’s O & M manuals and a copy shall be left at the location of the new refrigerant monitor.

o Contractor shall allow up to 10 days for submittal review. A resubmittal would require additional time. No extension of the contract time will be authorized because of failure to transmit submittals enough in advance of the work to permit processing, including resubmittals.

o Procurement Before Approval: The contractor is advised not to procure any item for which submittal approval is required but not yet granted. If approval is denied, the contractor will be prevented from installing the disapproved item(s). The contractor must transmit a new submittal package for the new items replacing the disapproved items and must procure only approved items. The contractor shall take responsibility for the delivery and installation of any items installed before submittal approval is granted. The FAA reserves the right to discontinue field work on any item furnished without submittal approval. Procuring and/or installing material which is later disapproved could result in substantial losses of money and time for the contractor.

• Available storage areas for contractor’s materials and equipment.

• Compliance with FAA safety practices, orders, general operating procedures, and security regulations.

• Availability of onsite power for use by the contractor as determined by the FAA COR/POC and/or Technicians.

• The FAA Pre-Construction and Maintenance Project Safety and Health Checklist, form 3900-18, will be reviewed and filled out during the meeting.

• Any additional subjects discussed pertinent to the contract.

1B.3 Product Requirements.

1. Deliver, store, and handle products using means and methods that will prevent damage, deterioration, and loss, including theft and vandalism. Comply with manufacturer's written instructions.

2. Delivery and Handling:

a. Schedule delivery to minimize long-term storage at Project site and to prevent overcrowding of construction spaces.

b. Deliver products to Project site in an undamaged condition in manufacturer's original sealed container or other packaging system, complete with labels and instructions for handling, storing, unpacking, protecting, and installing.

c. Inspect products on delivery to determine compliance with the Contract Documents and to determine that products are undamaged and properly protected.

3. Storage:

a. Store products to allow for inspection and measurement of quantity or counting of units.

b. Store materials in a manner that will not endanger Project structure.

c. Comply with product manufacturer's written instructions for temperature, humidity, ventilation, and weather-protection requirements for storage.

d. Provide a secure location and enclosure at Project site for storage of materials and equipment by Owner's construction forces. Coordinate location with Owner.

1B.4 Product Requirements.

1. Deliver, store, and handle products using means and methods that will prevent damage, deterioration, and loss, including theft and vandalism. Comply with manufacturer's written instructions.

1B.5 Working Hours.

1. All work hours will be dependent on impact to NAS facilities and locations throughout the ARTCC.

2. Work shall be generally performed during normal business working house of 7:00AM to 5:00PM, Monday through Friday, except otherwise indicated.

3. The start and stop time shall typically be coordinated with the schedules of the FAA COR/POC and/or Technicians to minimize or prevent the need for overtime work by FAA personnel.

1B.6 Ingress and Egress to Work Area.

The FAA POC and/or Technicians shall direct all ingress and egress to the work area. Security precautions against unauthorized facility entrance will be maintained. Contractor personnel shall be escorted at all times upon entry through the security gate by FAA COR/POC and/or Technicians.

1B.7 Security Requirements.

1. Security Guard: Contractor must use the existing guard house on the north entrance to the facility to check in prior to starting work for the day. The FAA COR/POC and/or Technicians will meet the contractor at the guard house to provide escort into the facility.

2. Personnel List: Contractor must provide the FAA COR/POC with a list of contractor's personnel who will require access to the site within twenty-four (24) hours of arrival to site. The list must be kept current during project duration.

3. Security Investigation and Identification: Contractor's personnel may be subject to security investigation by FAA. Upon request by the CO, the contractor must promptly complete all security forms provided by the CO. If Contractor's personnel do not hold a “yellow” security badge or a contractor PIV card, then they must report to the FAA security guard at entrance to the facility and submit proper identification when signing in to obtain a “red” FAA visitor badge which will be always worn on an outside garment while on the facility premises. This badge must be returned daily to the security guard when leaving the premises, unless otherwise noted.

4. Vehicle Identification: Contractors and contractor's employees' vehicles must park as designated in the staging plans or as directed by the FAA COR/POC.

5. Escort Requirement: Contractor's personnel will always be escorted by FAA POC and/or

Technicians during the project. Contractor's personnel shall not violate any security regulations pertaining to the ARTCC facility.

6. Right to Search: Current procedures at FAA facilities include the "right to search." If in the judgment of the FAA a cause to search a vehicle or the person of personnel exists, such search will be made.

7. Prohibited Items:

a. Weapons. ABSOLUTELY NO WEAPONS in any way, shape, or form are allowed on the job site, facility premises, or inside contractor vehicles (company or personally owned).

This includes ammo, ammo casings, empty cartridges, etc... Any weapons found by

Security guards, (Refer to No. 6: Right to Search), may be subject to confiscation. Security guards also reserve the right to contact local law enforcement and/or Homeland Security.

Contractor will then be banned for life from any access to the ZFW facility.

b. Other Projectile Weapons. This category includes items such as compressed air guns, flare guns, spear guns, stun guns, realistic replica or toy firearms and other electric weapons, ammunition, and slingshots.

c. Bladed, Edged, or Sharp Tools or Implements. This category includes items such as axes or hatchets, bows and arrows, ice axes, and martial arts weapons. It also includes bladed devices with a blade of 2½ inches or more and all straight razors excluding safety razors.

i. Exception: tools of the trade

d. Club-like Items and Striking Devices. This category includes items such as Billy clubs, night sticks, blackjacks, brass knuckles, and chains in excess of 12 inches (jewelry exceptions can be made).

e. Destructive Devices, Explosives or Combustible Chemical Compounds or Mixtures. This category includes items such as blasting caps, detonators, dynamite, fireworks, gunpowder, hand grenades, plastic explosives, realistic replicas of explosives or other devices, gas torches, and flammable liquids. Disabling Chemicals and Other Dangerous Items. This

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category includes items such as mace, pepper spray, tear gas or other chemical spray, spillable batteries except those in wheelchairs and similar devices, spray paint, and poisonous gases.

f. Controlled Items. Controlled items are those items that may be otherwise prohibited but are

“tools of the trade” and “sporting equipment” that are considered potentially dangerous.

FAA personnel may possess controlled items on federal property. Government-furnished items are authorized within facilities. Personal items are allowed within a facility if the item is necessary to perform a mission or maintenance operation (e.g., saws, screwdrivers) and its need is sanctioned by the FM or designee. Otherwise, personal items must remain in personal vehicles.

i. Bladed, Edged, or Sharp Weapons. This category includes items such as saws

(including cordless, portable power saws), metal scissors with pointed tips, screw drivers (except eyeglass repair kits), drills (including portable power drills) and tools including wrenches, pliers, and folding utility tools.

ii. Club-like Items and Striking Devices. This category includes items such as hammers, crowbars, baseball/softball bats, golf clubs, hockey sticks, lacrosse sticks, pool cues, and ski poles.

iii. Destructive Devices, Explosives, or Combustible Chemical Compounds and

Mixtures. This category includes items such as flares, gasoline, and aerosol sprays.

iv. Disabling Chemicals and Other Dangerous Items. This category includes items such as chlorine and bleach, compressed gas cylinders (including fire extinguishers), and toxic industrial chemicals or materials.

g. Drugs/ Drug Paraphernalia

h. Alcohol/ Alcohol Container (full or empty)

1B.8 Property Damage.

The contractor shall take all precautions to avoid damage to Government property or equipment (existing and new). Any damage to Government property or equipment by the contractor shall be repaired by the contractor to its original state or better condition at no additional expense to the Government.

1B.9 Parking of Contractor Vehicles.

All personnel will park their vehicles in pre-designated areas and all access doors or as authorized by the

FAA COR/POC and/or Technicians. Materials and tools may be off-loaded at the work site by arrangements with the FAA COR/POC and/or Technicians.

1B.10 Storage of Materials.

The contractor shall store all materials in a manner to protect them from all elements of the weather.

Storage of reasonable quantities of material, supplies and tools on site is permissible providing the FAA

COR/POC and/or Technicians authorizes the location. The FAA is not responsible for the security of the materials, supplies and tools owned by the contractor.

1B.11 Site Visit.

The contractor shall take steps necessary to ascertain the nature of the work and satisfy themselves to the conditions that can affect the work. The site visit shall include verifying field measurements and conditions. No subsequent extras will be allowed due to any claim of lack of knowledge for conditions that can be determined by examining the site. Errors, inconsistencies, or omissions discovered shall be reported to the contracting officer. Site visits can be arranged by contacting the facility POC Steve Jarvis, (817)

858-7552 or Alexander Rosado, (817) 858-7404 at least 7 days prior to the planned visit.

1B.12 Compliance with Local Codes and Other Codes.

The contractor shall comply with local and other codes of standard trade practices adopted by these contract documents. Where the requirements of the specifications exceed those of the local and adapted codes, the contractor shall comply with the requirements of the specifications.

1B.13 Fire Protection.

The contractor shall have an equivalent of two 20 lb. Class A, B and D fire extinguishers in the work area through the progress of the job.

1B.14 Cleaning.

The contractor shall keep the working area in a clean and proper condition. All rubbish and waste resulting from the execution of the work shall be removed at the end of each day. Immediately after unpacking, all packing materials shall be removed from the building and the premises. Upon completion of work and before final inspection, the contractor shall remove his/her working tools, equipment, debris, rubbish, and unused materials from the building site. Disposal of rubbish and debris will be off site and at no additional cost to the FAA or as directed by the FAA COR/POC and/or Technicians.

1B.15 Non-interference with Existing Facility Operations.

The access to the facility shall be always kept unobstructed. If any interference with the existing facility operation or access seems to be unavoidable, the contractor shall advise the contracting officer through the

RE/COR and/or Technicians 72 hours before such interference. FAA reserves the right to stop work at any time if the operation of this facility is jeopardized by the contractor’s work. This facility maintains air traffic control without shutdown. Various techniques are employed to achieve maximum system availability. Mechanical and electrical systems in direct support of air traffic operation and environmental systems have redundant configurations. Shutdown of equipment shall be scheduled with the FAA

COR/POC and/or Technicians at least 72 hours prior to the control systems installer’s need. The reliability of mechanical and electrical systems is compromised when redundant equipment is not available. Every effort will be made by the FAA to allow work to be accomplished during the installer’s working hours.

FAA personnel shall accomplish equipment shutdown.

1B.16 Other Contracts.

The Government may undertake other contracts for additional work at or near the site of the work under this contract. The contractor shall fully cooperate with other contractors and with the

Government employees and shall adapt scheduling and performing the work under this contract to accommodate the other work. The contractor shall not commit or permit any act that will interfere with performance of work by any other contractor or by Government employees.

1B.17 Contractor’s Liability.

Damage to the existing facility or equipment caused by the contractor shall be immediately reported to the

FAA POC and/or Technicians immediately. The contractor shall be responsible for repairing or having repaired all damaged areas of the facility or equipment directly caused by contractor related work. All repairs shall be accomplished, without delay, at the contractor’s expense to the satisfaction of the FAA

COR/POC and/or Technicians.

1B.18 Permits.

The contractor shall be responsible for obtaining all state, city, county, etc. permits, if required, to complete the project, at no additional cost to the Government.

1B.19 Material.

All equipment, material, and articles incorporated into the work covered by this contract shall be new and of the most suitable grade for the purpose intended, unless otherwise specifically provided in this contract.

References in the specifications to material, articles, or patented processes by trade name, make, or catalog number, shall be regarded as establishing a standard of quality and shall not be construed as limiting competition. The contractor may, at his option, use any equipment, material, article, or process that, in the judgment of the FAA COR/POC and/or Technicians, is equal to that named in the specifications, unless otherwise specifically provided in this contract.

1B.20 Workmanship.

The contract shall be accomplished by workers experienced in each trade in accordance with the highest standards of the various trades involved. The FAA COR/POC and/or Technicians must approve all details to assure the professional and complete project, whether stated in the specifications or not. The COR/POC and/or Technicians may require, in writing, that the contractor will remove from the work site any employee the FAA COR/POC and/or Technicians deems incompetent, careless, or otherwise objectionable.

1B.21 Superintendence by the Contractor.

At all times during the performance of this contract and until the work is completed and accepted, the contractor shall directly superintend the work on site or assign and have on site a competent superintendent who is satisfactory to the FAA COR/POC and/or Technicians and has the authority to act for the contractor.

SECTION 1C – HIGH LEVEL SCOPE OF WORK

Pictures: Existing Chiller Refrigerant Monitor

Fort Worth ARTCC: Chiller Refrigerant Monitor Replacement

The Contractor shall provide all labor, materials, and equipment in accordance with the contract

Provisions and specifications included herein. The work shall include, but is not limited to, the following:

1) Purchase and deliver a new Chillgard® 5000 Refrigerant Monitor. An equivalent refrigerant monitor by other manufacturers may be submitted for evaluation.

2) Field verify with ZFW Tech Ops the appropriate circuit and panelboard from which the existing refrigerant monitor is powered. Lock-out the appropriate circuit. Disconnect the power and sensor feeds at the existing refrigerant monitor.

3) Disconnect the three incoming conduits and five sensor cables from the monitor enclosure.

Evaluate to determine if any adaptors or fittings will be required to attach to the new monitor enclosure. Contractor to provide required fittings, adaptors, or other hardware as an incidental cost.

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4) Remove the existing refrigerant monitor. Coordinate with ZFW Tech Ops if the monitor is to be turned over. If not turned over to the FAA it is to be disposed of by Contractor.

5) Install the new refrigerant monitor. Mounting hardware is to be incidental to the job. Connect the existing power and sensor wires to the new monitor.

6) Power up the new refrigerant monitor and perform calibration and testing.

7) Provide manufacturer’s O & M manual.

8) Field Quality Control: Provide a final report from a factory-authorized vendor that shows the system is calibrated to meet or exceed factory specifications.

9) Demonstration: Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain refrigerant detection device

10) Provide warantee documentation.

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SECTION 1D – REFRIGERANT DETECTION EQUIPMENT SPECIFICATIONS

1D.1 SUBMITTALS

A. Product Data:

1. For refrigerant monitor, include refrigerant sensing range in ppm, temperature and humidity range, alarm outputs, display range, furnished specialties, installation requirements, and electric power requirement.

B. Shop Drawings:

1. Wiring Diagrams: Power, signal, and control wiring.

C. Product Certificates: For monitoring device, signed by product manufacturer.

D. Field quality-control test reports.

E. Operation and Maintenance manual.

1D.2 WARRANTY

A. Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components that fail in materials or workmanship within 1 year from substantial completion.

1D.3 PRODUCTS

A. Known Acceptable Source: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. MSA Safety Incorporated / Bacharach

2. SenTech Corporation.

3. Honeywell

4. Vulcain

B. Description: Sensors shall be factory tested, calibrated, and certified to continuously measure and display the specific gas concentration and shall be capable of indicating, alarming, and automatically activating ventilation system. The sensing elements and devices shall support various kinds of refrigerant and the operator shall be able to reprogram and reconfigure the types of refrigerant without replacing the panel or sensing elements.

C. Standard: Monitoring system shall comply with ASHRAE 15.

D. Performance:

1. Refrigerant to Be Monitored: R-123.

2. Range: 0 to 1000 ppm.

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3. Sensitivity:

a. Minimum Detectability: 10 ppm.

b. Accuracy: Plus or minus 1 ppm plus or minus 10 percent of reading from 0 to 1000 ppm.

c. Repeatability: Plus or minus 1 percent of full scale.

d. Detection Level Set Points: R-123

1) Detection Level 1: 250 ppm.

2) Detection Level 2: 500 ppm.

4. Operating Temperature: 32 to 104 deg F.

5. Relative Humidity: 20 to 95 percent, noncondensing over the operating temperature range.

E. Input/Output Features:

1. Maximum Power Input: 120-V ac, 60 Hz, 75 W.

2. Number of Air-Sampling Points: Six calibrated for R-123.

3. Air-Sampling Point Inlet Filter: 0.10-micron filter element for each sampling point.

4. Air-Sampling Point Analog Output: 0- to 10-V dc into 2k ohms, or 4- to 20-mA into 1k ohms matched to sensor output.

5. Alarm Relays: Minimum 3 relays at a minimum of 5-A resistive load each.

6. Alarm Set Points: Displayed on front of meter and adjustable through keypad on front of meter.

7. Alarm Acknowledge Switch: Mount in the front panel of the monitor to stop audible and visual notification appliances, but alarm LED remains illuminated.

8. Alarm Manual Reset: Momentary-contact push button in the front panel of the monitor stops audible and visual notification appliances, extinguishes alarm LED, and returns monitor to detection mode at current detection levels.

9. Display: Alphanumeric LCD, LED indicating lights for each detection level; acknowledge switch and test switch mounted on front panel; alarm status LEDs and service fault LEDs.

10. Audible Output: Minimum 75 dB at 10 feet.

11. Visible Output: Strobe light.

12. Sensor Analog Output: 0- to 10-V dc into 2k ohms, or 4- to 20-mA into 1k ohms.

13. Enclosure: NEMA 250, Type 1, with locking quarter-turn latch and key.

1D.3 EXECUTION

A. Installation: Comply with ASHRAE 15.

B. Field Quality Control: Provide a final report from a factory-authorized vendor that shows the system is calibrated to meet or exceed factory specifications.

C. Demonstration: Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain refrigerant detection device.