W912EP-16-R-0021-0005.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04 EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

FLEET READINESS CENTER SOUTH EAST (FRCSE) B101U W HVAC REPLACEMENT

W912EP-16-R-0021 is hereby amended.

See SF30 Continuation Sheet for Summary of Changes.

The proposal receipt date of 08 November 2016 by 1600 ET remains unchanged.

All other terms and conditions remain unchanged.

Disregard information posted on FedBizOpps that this project was awarded. The notice was posted in error.

1. CONTRACT ID CODE PAGE OF PAGES

1 36

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 03-Nov-2016

16B. UNITED STATES OF AMERICA 15C. DATE SIGNED 15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer) (Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912EP-16-R-0021

X 9B. DATED (SEE ITEM 11)

22-Sep-2016

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

03-Nov-2016

CODE

USA ENGINEER DISTRICT, JACKSONVILLE

CONTRACTING DIVISION

701 SAN MARCO BLVD

JACKSONVILLE FL 32207-8175

W912EP 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODE CODE

EMAIL: TEL:

W912EP-16-R-0021

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

Changes to Specifications:

Volume 2 of 2 – Technical Specifications:

DELETE Section 23 64 16.00 25 WATER COOLED, VARIABLE-SPEED, CENTRIFUGAL CHILLERS and

REPLACE with attached revised Section 23 64 16.00 25.

Changes to Drawings:

DELETE Drawing No. H-006 and REPLACE with attached revised Drawing No. H-006.

DELETE Drawing No. S001 and REPLACE with attached revised Drawing No. S001.

(End of Summary of Changes)

Building 101U West HVAC Modifications, Jacksonville, FL

SECTION TABLE OF CONTENTS

DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)

SECTION 23 64 16.00 25

WATER COOLED, VARIABLE-SPEED, CENTRIFUGAL CHILLERS

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY ASSURANCE

1.4 DEFINITIONS

1.5 SAFETY REQUIREMENTS

1.6 DELIVERY, STORAGE, AND HANDLING

1.7 PROJECT REQUIREMENTS

1.7.1 Verification of Dimensions

1.7.2 Drawings

1.7.3 Equipment Warranty Tags

1.8 WARRANTY

1.8.1 Indexed Notebook

PART 2 PRODUCTS

2.1 STANDARD COMMERCIAL PRODUCTS

2.2 MANUFACTURER'S STANDARD NAMEPLATES

2.3 ELECTRICAL WORK

2.4 VARIABLE SPEED, WATER COOLED CENTRIFUGAL WATER CHILLER

2.4.1 Design and Installation Requirements

2.4.2 Chiller Components

2.4.2.1 Compressor

2.4.2.2 Refrigerant Circuits

2.4.2.3 Evaporator

2.4.2.4 Refrigerant Receiver

2.4.2.5 Condenser

2.4.2.6 Controls

2.5 VARIABLE SPEED MOTOR STARTER/CONTROLLERS

2.6 FACTORY TESTS

PART 3 EXECUTION

3.1 EXAMINATION

3.2 INSTALLATION

3.3 CONNECTIONS

3.4 START-UP TESTING

3.5 ACCEPTANCE TESTING

3.6 DEMONSTRATIONS

-- End of Section Table of Contents --

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 1 Rev 1

SECTION 23 64 16.00 25

WATER COOLED, VARIABLE-SPEED, CENTRIFUGAL CHILLERS

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this section to the extent referenced. The publications are referred to within the text by the basic designation only.

AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI)

AHRI 550/590 (2003) Performance Rating of Water-Chilling Packages Using the Vapor Compression Cycle

AHRI 575 (2008) Method of Measuring Machinery Sound Within an Equipment Space

ANSI/AHRI 495 (2005) Performance Rating of Refrigerant Liquid Receivers

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ANSI/ASHRAE 15 & 34 (2010; Addenda A, B, C, D, E, F, G, H, I, J, K, L, N and O; Errata 2011; INT 1 2012;

Errata 2012; Addenda AD, SD, AE and AF 2013) ANSI/ASHRAE Standard 15-Safety Standard for Refrigeration Systems and ANSI/ASHRAE Standard 34-Designation and Safety Classification of Refrigerants

ASHRAE 90.1 (2007) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 147 (2002) Reducing Release of Halogenated Refrigerants from Refrigeration and Air-Conditioning Equipment and Systems

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C606 (2011) Grooved and Shouldered Joints

AMERICAN WELDING SOCIETY (AWS)

AWS Z49.1 (2012) Safety in Welding and Cutting and Allied Processes

ASME INTERNATIONAL (ASME)

ASME BPVC SEC VIII D1 (2010) BPVC Section VIII-Rules for Construction of Pressure Vessels Division 1

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 2 Rev 1

ASTM INTERNATIONAL (ASTM)

ASTM B117 (2011) Standard Practice for Operating Salt Spray (Fog) Apparatus

ASTM C534/C534M (2013) Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 519 (1992; R 1993; Errata 2004) Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems

IEEE C37.90.1 (2012) Standard for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2008) Enclosures for Electrical Equipment (1000 Volts Maximum)

NEMA MG 1 (2011; Errata 2012) Motors and Generators

NEMA MG 10 (2001; R 2007) Energy Management Guide for Selection and Use of Fixed Frequency Medium AC Squirrel-Cage Polyphase Induction Motors

NEMA MG 11 (1977; R 2012) Energy Management Guide for Selection and Use of Single Phase Motors

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 508 (1999; Reprint May 2013) Industrial Control Equipment

1.2 SUBMITTALS

SD-02 Shop Drawings

Chiller Dimensioned Drawings; G, AE

Chiller Controls Schematic; G, AE

Chiller Single-Line Power Schematic; G, AE

IEEE 519 Harmonic Distortion Analysis; G, AE

Chiller Coordination Drawings; G, AE

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 3 Rev 1

SD-03 Product Data

Water Chiller; G, AE

Manufacturer's standard catalog data, highlighted to show material, size, options, performance charts and curves, etc. in adequate detail to demonstrate compliance with contract requirements. Data shall include manufacturer's recommended installation instructions and procedures. Data shall be adequate to demonstrate compliance with contract requirements as specified within the paragraphs:

a. Water Chiller:

1. Provide standard 100 percent capacity and performance at AHRI standard conditions and at the indicated conditions for this project.

2. Provide standard capacity and performance at AHRI standard unloading conditions.

3. Provide design and minimum evaporator refrigerant and chilled water flowrates. Provide design and minimum condenser water flowrates.

4. Refrigerant capacity of chiller.

5. Oil Capacity of chiller.

6. Fluid capacity of evaporator and condenser.

7. Characteristics of refrigerant pressure relief valves.

8. Minimum entering condenser-fluid temperature.

9. Table of performance at varying flowrates & capacities with constant design condenser-fluid temperatures.

b. Chiller Components

c. Accessories

d. Refrigerant: Provide product data required by LEED-NC credit EAc4 - Enhanced Refrigerant Management.

e. Vibration Isolation: Provide catalog cuts and certification that the isolation characteristics of the isolators provided meet the manufacturer's recommendations.

Manufacturer's Multi-Year Compressor Warranty; G, AE

Indexed Notebook

SD-06 Test Reports

Start-Up Testing; G, AE

Acceptance Testing; G, AE

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 4 Rev 1

Six copies of the report shall be provided in bound 8 1/2 x 11 inch booklets. Provide a schedule, at least two weeks prior to the start of related testing, for the system performance tests. The schedules shall identify the proposed date, time, and location for each test.

SD-07 Certificates

Chiller System; G, AE

Where the system, components, or equipment are specified to comply with requirements of AGA, NFPA, AHRI, ASHRAE, ASME, or UL, one copy of proof of such compliance shall be provided. The label or listing of the specified agency shall be acceptable evidence. In lieu of the label or listing, a written certificate from an approved, nationally recognized testing organization equipped to perform such services, stating that the items have been tested and conform to the requirements and testing methods of the specified agency may be submitted. When performance requirements of this project's drawings and specifications vary from standard AHRI rating conditions, computer printouts, catalog, or other application data certified by AHRI or a nationally recognized laboratory as described above shall be included. If AHRI does not have a current certification program that encompasses such application data, the manufacturer may self certify that his application data complies with project performance requirements in accordance with the specified test standards.

SD-08 Manufacturer's Instructions

Installation Instructions

Training Course

Provide training material and schedule, at least two weeks prior to the date of the proposed training course, which identifies the date, time, and location for the training.

Posted Instructions; G, AE

Posted instructions, including equipment layout, wiring and control diagrams, piping diagrams, valves and control sequences, and typed condensed operation instructions shall be posted. The condensed operation instructions shall include preventative maintenance procedures, methods of checking the system for normal and safe operation, and procedures for safely starting and stopping the system.

The posted instructions shall be framed under glass or laminated plastic and be posted where indicated by the Contracting Officer.

SD-09 Manufacturer's Field Reports

Factory Tests; G, AE

Provide schedules which identify the date, time, and location for each test. Schedules shall be submitted for both the Chiller Performance Test and the Chiller Sound Test at least two weeks prior to the start of the testing. The Chiller Performance Test schedule shall also allow the witnessing of the test by a Government Representative.

Six copies of the factory chiller test report shall be provided in bound 8-1/2 x 11 inch booklets. Reports shall certify the compliance

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 5 Rev 1 with performance requirements and follow the format of the required testing standard for both the Chiller Performance Tests and the Chiller Sound Tests. Test report shall include certified calibration report of all test instrumentation. Calibration report shall include certification that all test instrumentation has been calibrated within 6 months prior to the test date, identification of all instrumentation, and certification that all instrumentation complies with requirements of the test standard. Test report shall be submitted one week after completion of the factory test.

Verification of Dimensions; G

Contractor shall visit the project site and inspect the facilities and dimensions of the space(s) available for the installation of a water-cooled chiller, suitable for this project.

Letter of Site Visit; G

Contractor shall provide a letter including the date the site was visited, confirmation of existing conditions and their suitability for this project, and listing of any discrepancies found.

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; G, AE

Six complete copies of an operation manual in bound 8-1/2 x 11 inch booklets listing step-by-step procedures required for system startup, operation, abnormal shutdown, emergency shutdown, and normal shutdown at least four weeks prior to the first training course. The booklets shall include the manufacturer's name, model number, and parts list.

The manuals shall include the manufacturer's name, model number, service manual, and a brief description of all equipment and their basic operating features.

Six complete copies of maintenance manual in bound 8-1/2 x 11 inch booklets listing routine maintenance procedures, possible breakdowns and repairs, and a trouble shooting guide. The manuals shall include piping and equipment layouts and simplified wiring and control diagrams of the system as installed.

1.3 QUALITY ASSURANCE

All materials, fabrications, testing, performance rating, installation and workmanship shall comply with the applicable requirements and standards addressed within the following references. Each Chiller System shall undergo a series of standard factory tests, including a mechanical "run-in" test, to verify that vibration levels, oil pressures and temperatures are acceptable, and to ensure that the unit is leak tight, that all electrical components operate as intended, and that every aspect of unit fabrication meets stringent quality standards in accordance with good practice and the manufacturer's quality assurance requirements:

a. Chillers shall be fabricated, manufactured and assembled in accordance with ISO 9001 manufacturing quality standard process. Chiller evaporator and condenser components shall conform to ASME BPVC SEC VIII D1 for design and fabrication of pressure vessels and/or for manufacture of tubular heat exchangers and heat exchanger shells, and shall bear the ASME U-Stamp and nameplate, certifying

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 6 Rev 1 compliance.

b. Factory pressure testing of the chiller evaporator and condenser sections, tube side and shell side, shall be in strict conformance with all applicable sections of the ASME BPVC Code and shall bear the standard ASME symbol.

c. Chiller performance ratings shall be in accordance with AHRI 550/590, and chillers shall be stamped in compliance with AHRI certification.

d. ASHRAE Compliance: Chiller design and installation shall comply with ANSI/ASHRAE 15 & 34 for safety and with ASHRAE 147 for refrigerant recovery, handling and storage. Chiller full load and part load efficiencies shall exceed the requirements of ASHRAE 90.1.

e. Acoustics: Sound pressure levels shall not exceed the following specified levels at 3 feet from the installed chiller. The manufacturer shall provide sound treatment if required to comply with the specified maximum levels. Testing shall be in accordance with

AHRI 575.

OCTAVE BAND Overall

63 125 250 500 1000 2000 4000 8000 dB(A)

48 55 62 65 70 68 69 71 76

f. Comply with NFPA 70, the National Electrical Code. Electrical enclosures and panels shall be in accordance with NEMA 250. All machine wiring shall undergo an insulation resistance test. The machine control panel and all electrical components shall also be functionally tested to verify continuity and proper electrical operation.

g. Equipment manufacturer shall be a company specializing in manufacture, assembly, and field performance of water-cooled chiller equipment with a minimum of five (5) years experience. Where applicable, the manufacturer shall be listed by Underwriters Laboratories (UL) as a manufacturer of packaged, vapor compression cycle, water chillers.

h. Final assembly inspection shall verify that all valves, controls, sensors and instrumentation, pumps, purge components and all other machine components have been properly installed on the machine. Before shipment the chiller automated controls shall be tested to check for proper wiring and correct controls operation. At final inspection, each unit shall be checked for overall appearance, dimensional accuracy, and to verify that the manufacturer's nameplate data is correct and that all accessories are furnished as required.

All equipment or components supplied under this Section shall meet or exceed the requirements and quality of the items herein specified herein, and as denoted on the drawings.

1.4 DEFINITIONS

a. BAS: Building Automation System, based on distributed digital control (DDC) system.

b. COP: Coefficient of Performance. The ratio of the heat removal to the

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 7 Rev 1 rate of energy input using consistent units for any given set of rating conditions.

c. EER: Energy Efficiency Ratio. The ratio of the cooling capacity given in term of BTU/Hr to the total power input given in terms of watts at any given set of rating conditions.

d. IPLV: Integrated Part-load Value. A single-number part-load efficiency figure of merit calculated per the method defined by AHRI 550/590 and referenced to AHRI standard rating conditions.

e. kW/ton: The ratio of total power input of the chiller in kilowatts to the net refrigerating capacity in tons at any given set of rating conditions.

f. NPLV: Nonstandard part-load value. A single-number part-load efficiency figure of merit calculated per the method defined by AHRI 550/590 and intended for operating conditions other than the ARI standard rating conditions.

1.5 SAFETY REQUIREMENTS

Exposed moving parts, parts that produce high operating temperature, parts which may be electrically energized, and parts that may be a hazard to operating personnel shall be insulated, fully enclosed, guarded, or fitted with other types of safety devices. Safety devices shall be installed so that proper operation of equipment is not impaired. Welding and cutting safety requirements shall be in accordance with AWS Z49.1.

Chiller plant design shall comply with the requirements of ANSI/ASHRAE 15 & 34 and shall provide a refrigerant-vapor activated alarm system.

1.6 DELIVERY, STORAGE, AND HANDLING

Stored items shall be protected from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Proper protection and care of all material both before and during installation shall be the Contractor's responsibility. Any materials found to be damaged shall be replaced at the Contractor's expense. During installation, piping and similar openings shall be capped to keep out dirt and other foreign matter.

1.7 PROJECT REQUIREMENTS

1.7.1 Verification of Dimensions

For chiller replacement projects, the Contractor shall visit the project site and inspect the facilities and dimensions of the space(s) available for the installation of a water-cooled chiller, suitable for this project.

Contractor shall provide a letter of site visit including the date the site was visited, confirmation of existing conditions and their suitability for this project, and listing of any discrepancies found.

1.7.2 Drawings

Contractor shall provide Chiller Dimensioned Drawings showing the dimensioned plan and elevation view drawings, required clearances, and the location of all field connections. Provide detailed equipment assemblies indicating dimensions, weights, and load distribution.

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 8 Rev 1

Contractor shall provide Chiller Controls Schematic diagram of control system, integrating chiller into chilled water plant and facility DDC controls. Diagram should indicate points for field connection and fully delineate field and factory wiring.

Contractor shall provide Chiller Single-Line Power Schematic drawing of the field power hookup requirements, indicating all items furnished by the Vendor.

Contractor shall provide IEEE 519 Harmonic Distortion Analysis and shall determine the impedance/inductance necessary, i.e. line reactors and harmonic trap filters, to maintain system harmonic distortion to less than 5%. Submittal should include IEEE 519 harmonic distortion calculations based on the completed project installation as well as product data, indicating all items furnished by the Vendor to meet this requirement.

Contractor shall provide Chiller Coordination Drawings showing the dimensioned floor plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved:

a. Structural Supports

b. Piping roughing-in requirements

c. Wiring roughing-in requirements, including spaces reserved for electrical equipment.

d. Access requirements, including working clearances for mechanical controls and electrical equipment and tube pull and service clearances.

1.7.3 Equipment Warranty Tags

At the time of installation, each item of manufacturer's multi-year warranted equipment shall be tagged with a durable, oil- and water-resistant tag, suitable for interior and exterior locations, resistant to solvents, abrasion, and fading due to sunlight. The tag shall be attached with copper wire or a permanent, pressure-sensitive, adhesive backing. The tag shall be installed in an easily noticed location attached to the warranted equipment. The tag for this equipment shall be similar to the following in format, and shall contain all of the listed information:

MANUFACTURER'S MULTI-YEAR WARRANTY EQUIPMENT TAG

Equipment/Product Covered: ____________________ Manufacturer:_______Model No.:_____Serial No.:__ Warranty Period: From _________to _____________ Contract No.: _________________________________ Warranty Contact: _____________________________ Name: _________________________________________ Address: ______________________________________ Telephone: ____________________________________

STATION PERSONNEL SHALL PERFORM PREVENTIVE

MAINTENANCE AND OPERATIONAL MAINTENANCE

1.8 WARRANTY

In addition to the standard chiller warranty requirements as specified in Division 00, Contract Requirements, the chiller compressor shall be covered

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 9 Rev 1 by a manufacturer's multi-year compressor warranty.

The Contractor shall provide a five year parts and labor (includes refrigerant) manufacturer's warranty on the chiller compressor(s) and drive components, including the operating control system. This warranty shall be directly from the chiller manufacturer to the Government and shall be in addition to the standard one-year warranty of construction. The manufacturer's warranty shall provide for the repair or replacement of the chiller compressor(s) that become inoperative as a result of defects in material or workmanship within five years after the date of final acceptance. When the manufacturer determines that a compressor requires replacement, the manufacturer shall furnish new compressor(s) and arrange for installation at no additional cost to the Government. Upon notification that a chiller compressor has failed under the terms of the warranty, the manufacturer shall respond in no more than 24 hours. Response shall mean having a manufacturer-qualified technician onsite to evaluate the extent of the needed repairs. The warranty period shall begin on the same date as final acceptance and shall continue for the full product warranty period.

1.8.1 Indexed Notebook

The Contractor shall furnish to the Contracting Officer a bound and indexed notebook containing a complete listing of all water chillers covered by a manufacturer's multi-year warranty. The chiller list shall state the duration of the warranty thereof, start date of the warranty, ending date of the warranty, location of the warranted equipment, and the point of contact for fulfillment of the warranty. This information shall be provided for each chiller and the recorded chiller serial numbers shall identify each chiller. Point of contact shall include the name of the service representative along with the day, night, weekend, and holiday phone numbers for a service call. The completed bound and indexed notebook shall be delivered to the Contracting Office prior to final acceptance of the facility. The Contractor shall furnish with each manufacturer's multi-year warranty the name, address, and telephone number (day, night, weekend, and holiday) of the service representative nearest to the location where the equipment is installed. Upon a request for service under the multi-year warranty, the service representative shall honor the warranty during the warranty period, and shall provide the services prescribed by the terms of the warranty.

PART 2 PRODUCTS

2.1 STANDARD COMMERCIAL PRODUCTS

Materials and equipment shall be standard Commercial cataloged products of a manufacturer regularly engaged in the manufacturing of such products, which are of a similar material, design and workmanship. These products shall have a two year record of satisfactory field service prior to bid opening. The two year record of service shall include applications of equipment and materials under similar circumstances and of similar size.

a. Products having less than a two year record of satisfactory field service shall be acceptable if a certified record of satisfactory field service for not less than 6000 hours can be shown. The 6000 hour service record shall not include any manufacturer's prototype or factory testing. Satisfactory field service shall have been completed by a product that has been, and presently is being sold or offered for sale on the commercial market through the following copyrighted means:

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 10 Rev 1 advertisements, manufacturer's catalogs, or brochures.

2.2 MANUFACTURER'S STANDARD NAMEPLATES

Nameplates are required on major components if the manufacturer needs to provide specific engineering and manufacturing information pertaining to the particular component. Should replacement of this component be required, nameplate information will insure correct operation of the unit after replacement of this component

In salt-water or other corrosive environments, nameplates shall be a non-corroding metal such as nickel-copper, 304 stainless steel or monel.

Aluminum is not acceptable.

2.3 ELECTRICAL WORK

a. Provide motors, controllers, integral disconnects, contactors, and controls with their respective pieces of equipment, except controllers indicated as part of motor control centers. Provide electrical equipment, including motors and wiring, as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Manual or automatic control and protective or signal devices required for controls and devices specified, but not shown, shall be provided. For packaged equipment, the manufacturer shall provide controllers including the required monitors and timed restart.

1. For single-phase motors, provide premium efficiency type, fractional-horsepower alternating-current motors, including motors that are part of a system, in accordance with NEMA MG 11.

2. For polyphase motors, provide squirrel-cage medium induction motors, including motors that are part of a system, and that meet the efficiency ratings for premium efficiency motors in accordance with NEMA MG 10, Table 5 and NEMA MG 1, Table 12-12.

b. Provide motors in accordance with NEMA MG 10 and NEMA MG 11 and of sufficient size to drive the load at the specified capacity without exceeding the nameplate rating of the motor. Motors shall be rated for continuous duty with the enclosure specified. Motor duty requirements shall allow for maximum frequency start-stop operation and minimum encountered interval between start and stop. Motor torque shall be capable of accelerating the connected load within 20 seconds with 80 percent of the rated voltage maintained at motor terminals during one starting period. Provide motor starters complete with thermal overload protection and other necessary appurtenances.

c. Provide inverter duty premium efficiency motors for use with variable frequency, adjustable speed drives. Compressor drive motors shall be high torque, two pole, semi-hermetic, squirrel cage induction type with inherent thermal protection on all three phases. Compressor drive motors shall be cooled by suction gas.

d. Where variable-speed motors are indicated for miscellaneous equipment, solid-state variable-speed controllers may be provided to accomplish the same function. Use solid-state variable-speed controllers for motors rated 10 hp or less and adjustable-speed, variable frequency drives (VFDs) for larger motors.

e. Provide factory-installed and wired NEMA 250 -12, power-painted steel

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 11 Rev 1 cabinets with lockable, hinged, latched, and gasket seated outer doors. Provide main power connections, compressor/motor starters, fan motor contactors, current overloads, and factory wiring.

f. Provide a single point power connection to the chiller for its operational requirements for 3-phase power at the scheduled voltage.

1. Terminal block connections shall be provided at the point of incoming single point connection for field connection and interconnecting wiring to the compressors. Separate external protection shall be supplied by others, as required.

2. Provide a non-fused electrical disconnect switch with lockable external handle to isolate the unit power for servicing the unit.

2.4 VARIABLE SPEED, WATER COOLED CENTRIFUGAL WATER CHILLER

Provide and install as shown on the plans, factory assembled, factory charged with R-123 or R-134a, and factory run-tested; high-efficiency, variable-speed, water-cooled, centrifugal compressor chillers. Chillers may be either oil-free magnetic bearing or oil-free ceramic bearing type.

Provide chillers in the quantity and size as scheduled on the drawings and specified herein. Each chiller shall consist of one or more hermetic or semi-hermetic centrifugal compressors with independent refrigerant circuits, shell & tube, direct expansion evaporator and water-cooled condenser section, lubrication system, interconnecting wiring safety and operating control system, including capacity controller, control center, motor starting components and all other components necessary for protected and controlled unit operation, all mounted on a welded structural steel base.

2.4.1 Design and Installation Requirements

a. Description: Centrifugal water chillers shall be designed, fabricated and installed in accordance with standards as referenced herein.

Provide all water-cooled, factory-assembled, single package, variable speed driven water chiller consisting of centrifugal compressor, motor, variable frequency drive (VFD), cooler, condenser, and initial refrigerant operating charge.

b. General:

1. Provide O&M documentation prior to startup. Provide startup service by the manufacturer's certified factory-service and startup engineer for all chillers. Provide submittals for all factory startup and testing.

2. Compressor, motor and drive shall be hermetically or semi-hermetically sealed into a common assembly and arranged for easy field servicing.

3. Compressors shall start in the unloaded position.

4. Provide capacity control system capable of reducing unit capacity to 25 percent (single compressor units) or 15 percent (dual compressor units). Application of factory installed hot gas bypass (HGB) shall be acceptable as required to meet the specified minimum load requirement.

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 12 Rev 1

5. Condenser-Fluid Temperature Performance:

(a) Startup Condenser-Fluid Temperature: Chiller shall be capable of starting with an entering condenser-fluid temperature of 60 deg. F and providing stable operation until the system temperature is elevated to the minimum operating entering condenser-fluid temperature.

(b) Minimum Operating Condenser-Fluid Temperature: Chiller shall be capable of continuous operation over the entire capacity range indicated with an entering condenser water temperature of 65 degs.

F.

(c) Make factory modifications to standard chiller design if necessary to comply with the performance conditions indicated.

6. Performance Tolerance: Comply with the following in lieu of

AHRI 550/590:

(a) Allowable capacity tolerance: 100 percent of rated capacity minimum(Zero) 0 percent.

(b) Allowable IPLV/NPLV Performance Tolerance. (Zero) 0 percent.

(cb) Allowable Full Load Performance Tolerance: 105 percent of rated power input per ton maximum(Zero) 0 percent.

c. Performance: The supplied chillers shall meet or exceed the capacity as scheduled on the drawings. The chiller shall be capable of stable operation to a minimum of 25 percent (single compressor units) or 15 percent (dual compressor units) of full load. The unit shall be capable of operating with 65°F, or lower, entering condenser water temperatures. Part load and full load efficiency ratings of the water chiller shall meet or exceed those shown on the drawings, or as specified herein.

d. Cabinet: Unit panels, structural elements, control boxes and heavy-gauge structural base shall be constructed of painted galvanized steel. All exposed sheet steel shall be coated with baked on powder paint to meet or exceed the requirements of a 1,000-hour salt spray test in accordance with the ASTM B117 standard.

e. Acoustics: Manufacturer shall provide both sound power and sound pressure data in decibels. Sound pressure data per AHRI 575 must be provided in 8 octave band format at full load. In addition, A-weighted sound pressure at 30 feet should be provided at 100%, 75%, 50% and 25% load points to identify the full operational noise envelope. Sound power must be provided in 1/3 octave band format to highlight any tonal quality issues. If manufacturer cannot meet the noise levels per this specification, sound attenuation devices and/or barrier walls must be installed to meet this performance level.

2.4.2 Chiller Components

2.4.2.1 Compressor

The compressor-drive assembly shall be field serviceable, hermetic or semi-hermetic, variable-displacement, single-stage or multistage, centrifugal-type compressor driven by an electric motor. Bearings shall

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 13 Rev 1 require no oil for lubrication. Compressor shall be constructed with precision-machined, cast aluminum or cast iron casing and high strength thermoplastic electronics enclosures. The centrifugal impellers shall be fully shrouded and fabricated of cast and machined aluminum or composite material. The motor rotor and impeller assembly shall be the only major moving parts. The manufacturer shall provide an extended 5-year parts and labor warranty covering the compressor and all additional moving parts.

a. Compressor Bearings: Ceramic, oil-free.

b. Magnetic Compressor Bearings: Radial and axial magnetic bearings (combination permanent and electro magnets) to levitate the shaft thereby eliminating metal to metal contact, and thus eliminating friction and the need for oil. The magnetic bearing system shall consist of front, rear and axial bearings. Both the front and the rear bearings are to levitate the shaft at X and Y directions, and the axial at Z direction. The active magnetic bearings shall be equipped with an automatic vibration reduction and balancing system to ensure smooth and reliable operation. Each bearing position shall be sensed by position sensors and provide real time repositioning of the rotor shaft, controlled by on-board digital electronics.

1. In the event of a power failure, the magnetic bearings will remain in operation throughout the compressor coast-down using a reserve power supply. Provide mechanical bearings, designed for emergency touchdowns, as a backup to the magnetic bearings.

2. An oil lubrication system for the mechanical 'touchdown' chiller bearings, including an oil pump, shall be provided as required per chiller manufacturer. Provide this coast-down lubrication system with filtration, sump heater, oil cooler, factory installation and wiring, power connections and controls.

c. Capacity control shall be by means of an adjustable-speed, variable frequency drive (VFD) for linear capacity modulation, high part load efficiency, and reduced in-rush starting current. The VFD shall include IGBT (Insulated Gate Bipolar Transistor) type inverter that converts the DC voltage to an adjustable three-phase AC voltage.

Signals from the compressor controller shall determine the inverter output frequency, voltage and phase, thereby regulating the motor speed. Compressor speed shall be reduced as condensing temperature and/or heat load reduces, optimizing energy performance through the entire range from 100% to 15% or below of full load capacity of given ARI unloading conditions. Capacity shall modulate from 100% load to the minimum, infinitely as motor speed is varied across the range, and without unstable compressor operation. Inlet Guide Vanes (IGV) shall be built-in to further trim the compressor capacity in conjunction with the adjustable-speed control, to optimize compressor performance at low loads.

d. Motor shall be direct drive, premium efficiency, permanent-magnet synchronous motor, continuous duty, squirrel-cage, refrigerant liquid or suction gas cooled, accessible hermetic, induction type motor with 0.006-inch maximum mesh screen and with inherent internal thermal overload protection and external current overload on all three phases.

Motor shall be factory-mounted, aligned, and balanced as part of compressor assembly before shipping. Motor shall have the energy-efficiency characteristics required to suit the scheduled/specified chiller efficiency. Motor shall be variable speed, W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 14 Rev 1 powered by a pulse-width modulated (PWM), variable frequency AC power from the VFD control system. The motor shall comply with all project and industry electrical requirements for mechanical equipment.

1. Provide motor with thermistor or RTD in each of three-phase motor windings to monitor temperature and report information to the chiller unit control panel.

2. Provide motor with thermistor or RTD to monitor bearing temperatures and report information to chiller unit control panel.

3. An IEEE 519 harmonic analysis shall be provided as part of the submittal package.

4. Field acceptance testing shall provide a follow-up weeklong measured harmonic analysis to verify performance.

e. Compressor impeller assembly shall consist of a heat treated alloy steel drive shaft and impeller shaft with a lightweight, high strength, cast aluminum or composite material impeller. Compressor housing shall be cast aluminum or cast iron with o-ring sealed casing joints, designed for 235 psig working pressure and hydrostatically pressure-tested at 355 psig.

f. Balancing Requirements: All rotating parts shall be statically and dynamically balanced, and overspeed tested at the factory for smooth, vibration-free operation.

2.4.2.2 Refrigerant Circuits

Each circuit shall contain a thermostatic expansion valve or device, refrigerant charging connections, hot-gas muffler, replaceable-core filter drier, sight glass with moisture indicator, liquid-line solenoid valve and insulated suction line.

a. Refrigerant: Sufficient volume of dehydrated refrigerant (lubricating oil not required for oil-free chillers) shall be provided to permit maximum unit capacity operation before and during tests. Replace refrigerant charge lost during the warranty period due to equipment failure without cost to the Government.

b. Refrigerant Flow Control: Refrigerant flow to the evaporator will be controlled by a thermostatic expansion valve or a variable orifice, which shall be automatically adjusted to maintain proper refrigerant levels in the condenser and evaporator.

2.4.2.3 Evaporator

Shell and tube, hybrid falling film design with seamless copper tubes roller expanded into tube sheets. Designed, constructed, tested, and stamped in accordance with applicable portions of ASME BPVC SEC VIII D1 for minimum 235 psig refrigerant side design working pressure and 150 psig water side design working pressure. Shell shall be fabricated of rolled carbon steel plate with fusion-welded seams. Carbon steel tube sheets shall be drilled and reamed to accommodate the tubes, spaced at no more than 4 feet apart. For the waterside of liquid cooler the performance shall be based on a water velocity not less than 3 fps with a maximum water velocity of 10 fps and a fouling factor 0.0001 hr. sq. ft. degrees F/BTU.

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 15 Rev 1

a. Water shall flow through the tubes and refrigerant shall flow through the shell, surrounding the tubes.

b. Tubes shall be high-efficiency, internally and externally enhanced type copper tubes, with 3/4-inch or 1-inch OD, with 0.035-inch minimum wall thickness. Tubes shall have plain copper lands at all intermediate tube supports.

c. Water boxes shall be fabricated of carbon-steel; removable to permit tube inspection, cleaning and replacement from either end of the evaporator. Water box connections shall be 150 psig AWWA C606 grooved couplings. Provide high-point vent and low-point drain connections on each water box, with threaded plugs. Provide water boxes with hinges, with davits, or with lifting lugs for removal and re-installation.

1. Coat or clad all interior wetted surfaces with a corrosion-resistant finish.

d. Evaporator shall contain a liquid level sight gauge for reading of liquid level.

e. Evaporator shall include a suction baffle eliminator located above the tube bundle to prevent liquid refrigerant carry-over.

f. Evaporator shall have a refrigerant relief device sized to meet the requirements of ANSI/ASHRAE 15 & 34.

g. Insulation: Evaporator, suction piping, compressor, and all other parts subject to condensation shall be insulated with 3/4 inch minimum thickness of closed-cell, flexible-elastomeric thermal insulation, complying with ASTM C534/C534M, type 2 (sheet).

1. Factory-apply insulation over cold surfaces of liquid chiller components, including evaporator shell, water boxes, and suction piping. Liquid nozzles shall be insulated by the Contractor after piping installation.

2.4.2.4 Refrigerant Receiver

Provide a liquid receiver for chiller units when system refrigerant charge exceeds 80 percent of condenser refrigerant volume. Liquid receivers shall be horizontal type, designed, fitted, and rated in conformance with ANSI/AHRI 495. Receiver shall be constructed and tested in conformance with ASME BPVC SEC VIII D1. Each receiver shall have a storage capacity not less than 20 percent in excess of that required for fully charged system. Each receiver shall be equipped with inlet, outlet drop pipes, drain plug, purging valve, and relief devices as required by ANSI/ASHRAE 15 & 34.

2.4.2.5 Condenser

Shell and tube type, with seamless copper tubes roller expanded into tube sheets. Designed, constructed, tested, and stamped in accordance with applicable portions of ASME BPVC SEC VIII D1 for minimum 235 psig refrigerant side design working pressure and 150 psig water side design working pressure. Shell shall be fabricated of rolled carbon steel plate with fusion-welded seams. Carbon steel tube sheets, shall be drilled and reamed to accommodate the tubes, spaced at no more than 4 feet apart. For the waterside of refrigerant vapor condenser the performance shall be based on a water velocity not less than 3 fps with a maximum water velocity of 10

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 16 Rev 1 fps and fouling factor 0.0001 hr. sq. ft. degrees F/BTU.

a. Water shall flow through the tubes and refrigerant shall flow through the shell, surrounding the tubes.

b. Tubes shall be high-efficiency, internally and externally enhanced type copper tubes, with a nominal OD of 3/4-inch or 1-inch, with 0.035-inch minimum wall thickness. Tubes shall have plain copper lands at all intermediate tube supports to provide maximum tube wall thickness at the support areas.

c. Condenser shall include design features to prevent the direct impingement of high-velocity hot gas from the compressor discharge onto the tubes.

d. Condenser shall contain a liquid level sight gauge for visual reading and verification of liquid level.

e. Water boxes shall be fabricated of carbon-steel; removable to permit tube inspection, cleaning and replacement from either end of the condenser. Water box connections shall be 150 psig AWWA C606 grooved couplings. Provide high-point vent and low-point drain connections on each water box, with threaded plugs. Provide water boxes with hinges, with davits, or with lifting lugs for removal and re-installation.

1. Coat all interior wetted surfaces with a corrosion-resistant finish.

2.4.2.6 Controls

Chiller shall be furnished with unit mounted, stand-alone, microprocessor-based control center in NEMA 250-12 enclosure, hinged and lockable, factory wired with a single point power connection and separate control circuit. The control panel shall provide for chiller operation, including monitoring of sensors, actuators, relays, and switches. The control panel shall provide for chiller operation, including monitoring of sensors, actuators, relays, and switches, and shall be furnished with liquid-crystal display (LCD) keypad. The screen shall detail all operations and parameters, using a graphical representation of the chiller and its major components.

a. VFD Operation: The chiller shall be equipped with an integrated Variable Frequency Drive (VFD) to automatically regulate compressor speed in response to cooling load and the compressor pressure and lift requirement. The chiller unit controller shall control movable inlet guide vanes and variable compressor speed together, to provide loading/unloading, to supply the appropriate chiller refrigeration capacity, between 15% and 100% capacity for the dynamic cooling load, and to optimize chiller efficiency at all chiller load conditions.

b. General: Provide automatic control of chiller operation including compressor start/stop and load/unload, anti-recycle timers, chilled water and condenser water pumps, unit alarm contacts and run signal contacts. The control panel shall display countdown timer messages so the operator knows when functions are starting and stopping. Every programmable point shall have a 'pop-up' screen with allowable ranges so that the chiller shall not be able to be programmed to operate outside of its design limits.

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 17 Rev 1

1. Provide contacts for remote start/stop, and for remote alarm indication for abnormal operation or shutdown. Alarm contacts shall be provided to remote alert the facility DDC Control System for any unit or system safety fault.

2. The chiller control panel shall provide leaving chilled water temperature reset based on return water (CHR) temperature and outdoor air temperature; and a 4-20 ma signal from the building HVAC DDC controls system.

3. Chiller control panel shall reside on the BACnet, DDC Controls building automation control system network and shall use MS/TP physical data link layer protocol for communication with building automation control system.

c. Chiller shall automatically reset to normal chiller operation after power failure.

d. Unit operating software shall be stored in non-volatile memory. Field programmed set points shall be retained in lithium battery backed regulated time clock (RTC) memory for minimum 5 years.

e. Alarm contacts shall be provided to remote alert the facility DDC Control System for any unit or system safety fault.

f. Auxiliary hydronic system equipment, such as pumps and control valves, shall be interlocked with the chiller(s) to provide time delay and start sequencing.

g. Display and Keypad:

1. Provide minimum 80 character liquid crystal display that is both viewable in direct sunlight and has LED backlighting for nighttime viewing. Provide one keypad and display panel per chiller.

2. Display and keypad shall be accessible through display access door without opening main control/electrical cabinet doors.

3. Display shall provide a minimum of unit setpoints, status, electrical data, temperature data, pressures, safety lockouts and diagnostics without the use of a coded display.

4. Descriptions in English (or available language options), numeric data in English (or Metric) units.

5. Sealed keypad shall include unit On/Off switch

h. Programmable Setpoints (within Manufacturer limits):

1. Display language

2. Leaving chilled water (CHW) temperature

3. Local/remote control mode

4. Display units mode

5. System lead/lag control mode

W912-EP-16-R-0021 SECTION 23 64 16.00 25 Page 18 Rev 1

6. Remote CHW temperature reset

7. Percent current limit

8. Pull down menu for demand limiting

9. Low ambient temperature cutout enable/disable

10. Leaving chilled liquid setpoint and range

11. Maximum remote temperature reset

i. Display Data: The chiller…