P222015 Repair Bldg54 CRAC Units-SOW.pdf

STATEMENT OF WORK

KANSAS AIR NATIONAL GUARD, McCONNELL AFB PRQE222015 Repair Bldg 54 #2 CRAC Unit 16 June 2022

SW-1 LOCATION: McCONNELL Air Force Base, Wichita, KS. Arrangements for entrance onto the Base must be made by contacting Base Engineering at (316) 759-7477 between the hours of 7:00 a.m. and 4:00 p.m., Monday through Friday.

SW-2 SCOPE OF WORK: The work covered in this contract consists of furnishing all plant, labor, expertise, equipment, materials, facilities, transportation, and appliances necessary to perform operations in connection with the work described in paragraph SW-3. It is the intent of the government for the contractor to provide a complete and useable system. Any relevant details required for a complete system that are omitted in the contract plans and specifications will be provided by the Contractor at no cost to the government.

SW-3 SUMMARY OF WORK: Work shall consist of but is not limited to the following:

Task 1: Replace and reroute a portion of the existing copper refrigerant line sets on two existing 30 Ton Liebert Computer Room Air Conditioning (CRAC) Units. Each Liebert Unit has two R-22 refrigerant circuits each having approximately 120 pounds of refrigerant. Due to operational requirements of the server farm, only one circuit of one Liebert Unit can be down at a time. R-22 Freon can be recycled for #1 and #3 CRAC units if the acid content is acceptable, otherwise new Freon shall be used. CRAC-2 will be completely replaced with a new unit. Completely replace the refrigerant lines for the new CRAC-2 and charge the system. Each of the 6 existing line sets is comprised of one 1 inch line and one 1¼ inch line (see drawings for new and existing routing). Replacement lines will use ACR copper piping and will be insulated with Rubatex insulation. Provide insulation blocks at pipe supports and aluminum jacket around exterior piping to protect insulation. There will be combination isolation/shraeder valves installed at the condenser end of the new portion of the line sets as well as isolation/shraeder valves installed on the linesets just outside the indoor unit (Evaporator) approximately 4 feet above the finished floor. The result will be two isolation/shraeder valves on each line. Include installation of replaceable filter dryer assemblies. Linesets will exit the building through the concrete precast wall at approximately 12 feet high.

Lines will be supported by pipe stands or hangers keeping at least a 12 foot clearance above the ground until they reach the condensing units.

Note: The contractor will ensure cooling to the server farm is maintainted during the performance of this work by only having one circuit of each CRAC unit down at a time. Air conditioning must be sufficient to keep the server farm continuously at 73 degrees +/- 2 degrees.

Task 2: Replace CRAC-2 in its intirety. The new unit will consist of an interior 30 Ton Precision Cooling System CRAC Unit with a new 30 Ton DX Air-Cooled Microchannel Condensing Unit. The new units will be installed in the same locations as the old interior/exterior systems. Due to the criticality of the server farm, it is critical the demolition of the existing CRAC only occur immediately prior to the installation of the new unit. Install combination isolation/shraeder valves at the condenser end of the line sets as well as just outside the indoor unit (Evaporator) approximately 4 feet above the finished floor.

It is understandable that there may be a long lead time on the new CRAC Unit. Task 1 can occur immediately after the Notice to Proceed is provided or wait until the new CRAC unit has been delivered.

Once work has started on replacing the refrigerant lines and removing the CRAC Unit, it shall be the contractors responsibility to ensure the server farm temperature remains below 75 F. Any major issues with any of the existing CRAC units outside this scope of work would be handled by a change order or KSANG Maintenance staff.

Computer Room Air Conditioning Unit Specifications:

Computer Room Air Conditioning (CRAC) Unit Precision Cooling System – INDOOR UNIT Specifications

· Capacity: Nominal 105kW (30 Ton)

· Configuration: Air Cooled / Upflow

· Voltage: 460 Volt, 60Hz, 3 Phase, 65,000 amps RMS Short Circuit Current Rating

· Locking Disconnect Switch

· Supply Air Configuration: Exits top of cabinet – shall be connected to existing ductwork via flexible/canvus duct

· Return Air Configuration: Front return w/ grille

· Humidifier: Infrared w/ automatic flush cycle; Capacity: 22 lbs/hr

· Reheat: Three-stage, Finned tubular, 304/304 stainless steel electric; Capacity: 25kW

· Refrigerant: R-407C or R-410A; field supplied and field charged on air-cooled units

· Condensate Pump: factory installed dual float w/ unit alarm and high water shutdown. Rated for 100GPH at 20 ft head

· Provide with leak detection, provide link for alarm on BMS and local display

· Plenum: no, unit shall be connected to existing ductwork by others

· Floorstand: yes, may reuse existing if it is compatible with new unit

· Frame: minimum14 gauge, welded frame, with protective A-coating or E-coating.

· Frame can be field separated into three sections for transport through small areas (Unit shall be brought into the building through a standard 4’x7’ door opening)

· Front Service Access

· Exterior panels insulated & powder coated

· minimum 4" filters, minimum MERV 8 rating

· Centrifugal blower, minimum 200,000 hours L3 permanently lubricated pillow-block bearings.

Static regain duct attached to bottom of blower

· Dual fixed-pitch motor sheaves, dual fixed-pitch fan pulleys, dual belts and automatic belt-tensioning system

· Open Drip Proof NEMA Premium Efficiency Motor

· Dual refrigeration circuits with liquid line filter driers, refrigerant sight glasses, expansion valves, and liquid line solenoid valves

· Two (2) independent Digital Scroll Compressors provide variable capacity, increased part-load energy efficiency, and reduced compressor cycling

· A-frame Evaporator coil with stainless steel drain pan

· Digital Controls with High Definition Display

· Universal Building Management System communication w/ SNMP and BACnet IP (Ethernet Port); Ensure compatibility with existing BMS by Coordinating with Sandifer Engineering, Wichita, KS

Air-Cooled Microchannel Condensing Unit – OUTDOOR UNIT

· Voltage: 460 Volt, 60Hz, 3 Phase, 65,000 amps RMS Short Circuit Current Rating

· Legs: 18.0” aluminum, minimum

· Microchannel aluminum coil

· Variable Speed EC Fans

- Low Ambient temperature contols

· Premium electronic control board providing communication with interior unit and BMS

· Aluminum exterior panels

· Dual refrigerant circuit condenser

· R-407C or R-410A Refrigerant

Factory Services

· Parts Warranty: One Year Manufacturer’s warranty

· Labor Warranty - Installation: One year to be provided by installer

· Extended Compressor Warranty: Five year parts only, Labor not included

· CAT5/6 networking cable(s) for BMS communication to be provided and installed by controls contractor

SW-4 CODES & STANDARDS: All work performed under this contract shall be in accordance with federal, state and local codes & standards, as well as widely accepted industry standards, including but not limited to: International Building Codes, International Mechanical Code, International Plumbing Code, American Institute of Architects, American Concrete Institute, American Institute of Electrical Engineers, American Institute of Steel Construction, American National Standards Institute, American Society of Heating, Refrigerating and Air-Conditioning Engineers, American Society of Mechanical Engineers, American Society of Testing Materials, National Bureau of Standards, National Electric Code, American Welding Society, Brick Institute of America, Building Officials and Code Administrators, Federal Aviation Administration, National Fire Protection Association, Occupational Safety & Health Administration, Rubber Manufacturers Association, Underwriters Laboratories, and the Kansas DOT. standard specification. Additionally, all requirements of the Kansas Department of Health must be satisfied in their entirety for any work performed or materials bought under this contract. Failure to comply with any of the aforementioned codes and standards shall be considered as a failure to comply to contract specifications.

SW-5 UTILITIES: Contractors shall coordinate with all local utilities having jurisdiction: Kansas Gas and Electric, Wichita Water Dept., Southwestern Bell, AT&T, Wichita Sewer Dept. and the Base Engineers Office.

SW-6 CALL BEFORE YOU DIG: All contractors shall be responsible for “Call Before You Dig” for any excavations or penetrations into the ground greater than 4” deep. In addition, all contractors shall apply for a digging permit to the Base Engineers Office for any excavations or penetrations into the ground, greater than 4” deep. The contractor should expect a minimum of 7 days from the date of the request to the issuance of a permit. The Contractor is encouraged to attend the Digging Permit Meeting.

These meetings are scheduled for every Tuesday at 10:00 A.M.

SW-7 CONFINED SPACE: The Contractor shall provide a confined space entry permit to the Base Engineers Office prior to any entry into a permit-required confined space. The following steps shall be accomplished to acquire authorization to open or enter a confined space:

1. The Contractor shall provide written notice to the Contracting Office Technical Representative, (COTR) defining exact location of space requiring entry.

2. A KANG Confined Space Supervisor shall brief the Contractor on the following:

a. The contents of the space and known hazards that make the space permit-required.

b. The precautions and procedures that have been implemented by the organization to protect KANG personnel.

c. Emergency rescue responsibilities to determine whether the Contractor supplies the rescue team or if the installation fire department is expected to supply a rescue function.

d. It is the Contractor’s responsibility to contact the Fire Chief on the installation if the

Contractor is planning to use the installation fire department as a rescue function.

e. Standard procedures if the project requires a combined effort involving both KANG and contracted personnel to access the space at the same time.

f. Contractor shall follow Air Force Occupational Safety and Health Standard 91-25 and

Occupational Safety and Health Administration 29 CFR 1910.146.

3. A written record of the briefing shall be signed by the Contractor and Confined Space

Supervisor and kept on file in the project folder.

4. The Contractor accepts full responsibility at this point to initiate and maintain the permit and supply all material, equipment and labor to test, monitor, enter and exit the space in a safe manner.

5. The Contractor’s Confined Space Entry Permit shall be kept on site during entry to the space.

A copy of the Contractor’s Permit shall be returned to the COTR at the completion of the project.

SW-8 MATERIALS: The materials shall conform to specifications, applicable industry codes and standards and the manufacturer's recommendations, which ever is more stringent. Certificates of compliance and Technical Data Sheets are required for all materials supplied.

SW-9 SITE INSPECTION: The Contractor is required to acknowledge, at time of Bid Opening that said contractor has inspected, and is fully cognizant of conditions at the site. No allowance or consideration will be given after award for any condition(s) which was(were) existing at the time of the site visit.

SW-10 BASE ACCESS: The contractor shall comply with all applicable installation/facility access and local security policies and procedures, which may be obtained from the Contracting Officer’s Representative (COR). The contractor shall also provide all information required for background checks to meet installation access requirements to be accomplished by the local installation’s Security Forces, Director of Emergency Services or local Security Office. The contractor shall ensure compliance with all personal identity verification requirements as directed by DoD, HAF and/or local policy. Should the Force Protection Condition (FPCON) change, the Government may require changes in contractor security matters or processes. Contractor and all associated sub-contractors employees shall comply with adjudication standards and procedures using the National Crime Information Center Interstate Identification Index (NCIC-III) and Terrorist Screening Database (TSDB) (AFI 31-101 and AFI 10-245), applicable installation, facility and area commander installation/facility access and local security policies and procedures (provided by government representative), or, at OCONUS locations, in accordance with status of forces agreements and other theater regulations. The contractor shall be provided an electronic Base Access Form to be filed out and submitted electronically to the Project Manager. The security check process can take up to 5 days to be processed by the 22nd Security Forces. The Project Manager will notify the General Contractor once the requests have been processed. Approved individuals must provide picture identification and if driving they will need a valid driver’s license, auto registration and proof of insurance at the time they pick up their Badges at the Visitor Center located at the East Gate off Rock Road. After Contractors have their Badge they should enter the Base at the West Gate. Access is limited to locations noted on the Badge. All other areas are off limits. Vehicle Passes are not transferable to other vehicles. The Government reserves the right to deny access to any person, with no consequence to the contract.

SW-11 SAFETY: Compliance with OSHA and other applicable laws and regulations for the protection of employees is exclusively the obligation of the commercial contractor. Government employees must comply with AFOSH.

SW-12 CLEAN-UP: Clean-up and remove debris generated by this contract to an approved off-base location. Two (2) copies of the receiving (tipping or dumping) tickets, with a cover letter from the Prime Contractor stating the full name and address of the location to which debris was taken.

SW-13 GOVERNMENT RESOURCES: No Government resources shall be made available to the contractor, unless otherwise stated in this Statement of Work. The contractor shall provide for all necessary resources to provide a complete and usable facility or systems as described in the contract documents. The contractor shall not obligate Government resources in any manner. The Government shall seek remedy for any obligation or encumbrance imposed by the Contractors actions. Government resources include, but are not limited to, government owned materials, equipment, tools, vehicles, personnel and facilities.

SW-14 ATTACHMENTS

Building 54 Floor Plan with Construction Notes (2 Sheets)

-MD-1 DEMO #2 CRAC UNIT AND COOLANT LINES

-M-1 REPLACE #2 CRAC UNIT