AttachmentNo._1_STATEMENT_OF_WORK.pdf

TECHNICAL PROVISIONS

SECTION 1

STATEMENT OF WORK

UPGRADE HVAC SYSTEM FOR COMPUTER SERVER ROOM AT BUILDING 363

1.0 STATEMENT OF WORK:

The work to be done consists of furnishing all plant, labor, materials, and equipment and performing all work in strict accordance with this Statement of Work forming parts thereof for Upgrading the HVAC

System for the Computer Server Room at Building 363 at the Anniston Army Depot. A complete listing of work elements to be performed is located at the end of the Statement of Work. Generally all materials removed shall be disposed of at the designated site(s) on depot as directed by the contracting officer.

Disposal area(s) will be located within a five (5) mile radius of the work site.

1.1 ALL WORK:

All work will be done complete, in strict accordance with the Statement of Work, subject to the terms and conditions of the contract.

2.0 LIMITATIONS:

The general outline of work does not in any way limit the responsibility of the contractor to perform all work and furnish all plant, labor, materials, and equipment required by the Statement of Work or as required by the work element listings. The inclusion of any item in either the Statement of Work, the work element listings, or the drawings shall be considered as part of the work to be done.

3.0 RESPONSIBILITIES:

Contractor shall verify all measurements, drawings, and details and notify the Contracting Officer of any discrepancies, errors, or omissions before work begins. It shall be the responsibility of the contractor to visit the site and become familiar with the job conditions at and surrounding the worksite(s) prior to mobilization. Additional items or materials which may be required for completion and finishing of the work indicated, even though such items may not be explicitly defined in the Statement of Work or the work element listings, shall be an integral part of this contract.

4.0 WORK SCHEDULE:

Building 363 is will be in operation during the performance of this contract time period. Work by government personnel will continue in the area during the duration of the contract. Except where approved by the Contracting Officer, all work will be done during normal working hours. Normal working hours at Anniston Army Depot is 0700 til 1630 Monday thru Thursday, 0700 til 1530 every other Friday, and every other Friday is an off Friday.

5.0 PROTECTION OF GOVERNMENT PROPERTY AND SECURITY:

During the performance of the contract, the contractor shall provide adequate protection of all government property from damages that might occur as a result of any work being performed.

Protection of the buildings shall apply to any work that is being done in or around the existing structure.

The area for which the HVAC system is to be installed is a secure work site and will therefore require a government escort at all times. Contractor personnel shall be required to sign in, obtain their escort, and sign out upon leaving.

6.0 CLEANUP:

Contractor shall remove all debris and salvage items from jobsite daily and transport it to disposal areas on depot as designated by the Contracting Officer. All items removed from building remain the property of the Government.

7.0 LICENSES AND CERTIFICATIONS:

All contractors working on this contract, whether in‐state or out‐of‐state, are required to be licensed by the State licensing boards shown below. It is the responsibility of the contractor to get the requirements and applications from the boards. For the crafts listed below, each craftsman on the job site must have a state license. For electrical, plumbing, and gas fitting a Master level licensed craftsman must be on site in charge of the work.

Prior to beginning work, contractor shall provide as a submittal, a copy of all licenses applicable to the work to be performed.

(1) Contractors performing Heating and Air Conditioning work shall be licensed by the Alabama

Board of Heating and Air Conditioning Contractors, 100 North Union Street, Montgomery, AL

36130 (Telephone 334‐242‐5550)www.hvacboard.state.al.us. All personnel servicing refrigeration units must have EPA Section 608 Certification.

(2) Contractors performing Plumbing and Gas Fitting shall be licensed by the Alabama Plumbers and

Gas Fitters Examining Board, 11 West Oxmoor, Suite 104, Birmingham, AL 35209 (Telephone

205‐945‐4875)www.pgfb.state.al.us

(3) Contractors performing electrical work shall be licensed by the State of Alabama Electrical

Contractors Board, 660 Adams Avenue, Suite 301, Montgomery, AL 36104 (Telephone 334‐242‐

2839)http://www.aecb.state.al.us

(4) A contractor serving as a Prime contractor shall be licensed by the State General Contractors

Board, 2525 Fairlane Drive, Montgomery, AL 36116 (Telephone 334‐242‐

2839)http://www.agencies.state.al.us/gencontrbd.

8.0 PORTABLE CELLULAR TELEPHONE:

The contractor shall be equipped with a portable cellular telephone to allow two‐way communication at all times. The work site is a restricted site and no cell phones are allowed inside the building. The telephone shall be located at the job site and shall be kept in the work truck. It shall be monitored periodically during the work period. The telephone shall have a local commercial number and be readily accessible from a normal telephone. The telephone should be fully charged and operational at all times during the work period.

Portable is defined as having the ability to be transported on a person inside buildings, on rooftops, or anywhere else contract work is being performed. A vehicle installed telephone is an acceptable substitute.

9.0 GENERAL SAFETY PROVISIONS:

The contractor shall be responsible for insuring that all employees conform to the safety guidelines set forth by the Occupational Safety and Health Act, and accompanying OSHA regulations (OSHA‐

29CFR1926/1910), local depot safety rules and regulations, and other safety requirements as required by the specifications. This will include but not be limited to wearing eye and ear protection, safety shoes, and shirts with 4” minimum sleeves. Any violation of the safety requirements by any contractor personnel shall be cause for removal of said personnel from the job site until violation is corrected.

10.0 ELECTRICAL AND FIRE SAFETY:

Work near or around any electrically energized item shall only be performed after electricity to that item has been shut off. Disconnection and reconnection of electrical power to any electrically energized item shall be done at no additional cost to the Government. Contractor shall comply with all Occupational

Safety and Health Act applicable requirements regarding electrical safety.

Any hot work requirements to be performed on this or any project at the Anniston Army Depot requires the approval from the Anniston Army Depot Fire Department. Approval will be in the form of a Hot

Work Permit. Hot Work Permits may be obtained from the Fire Department during normal depot working hours.

11.0 SERVICE EQUIPMENT:

The contractor shall have immediate access to all service equipment, i.e. ladders, scaffold, power hand tools, or other equipment required to complete this contract. The contractor will not be allowed to use

Government‐owned equipment located at the worksite. 110 volt AC electrical convenience outlets are located throughout the building and will be available for use by the contractor provided they are not in use by Government personnel.

12.0 APPLICABLE SPECIFICATIONS:

Contractor shall perform all work in strict accordance with the latest edition of standard to the industry specifications such as, but not limited to:

AMERICAN CONCRETE INSTITUTE (ACI)

INTERNATIONAL BUILDING CODE

AMERICAN NATIONAL STANDARD INSTITUTE (ANSI)

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

AMERICAN WELDING SOCIETY (AWS)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

ALABAMA DEPARTMENT OF TRANSPORTATION SPECIFICATIONS (ADT)

NATIONAL ELECTRIC CODE (NEC)

INTERNATIONAL PLUMBING CODE

INTERNATIONAL MECHANICAL CODE

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA)

ENVIRONMENTAL PROTECTION AGENCY (EPA)

ALABAMA DEPARTMENT OF ENVIRONMENTAL MANAGEMENT (ADEM)

13.0 SUBMITTALS:

Required submittals may be shown on the drawings or as specified herein or both. Whether shown on drawings or not, submittal material shall be furnished for the ceiling cassettes, controllers, refrigeration ball valves, and the condensing unit.

SECTION 2

WORK ELEMENTS

UPGRADE HVAC SYSTEM FOR COMPUTER SERVER ROOM BUILDING 363

The work to be done consists of furnishing all plant, labor, materials, and equipment and performing all work in strict accordance with these specifications and drawings for project PO42 sheets 0 thru 12, to construct an HVAC system for the purpose of upgrading the cooling capacity of the computer server room located in building 363.

THE FOLLOWING SHALL BE PERFORMED BY THE CONTRACTOR:

1. REMOVAL OF NECESSARY CEILING TILES AND CEILING INSULATION (PROTECT EXISTING

COMPUTER EQUIPMENT AND THE ROOM FROM DUST AND DEBRIS). APPROXIMATE CEILING

HEIGHT ABOVE FLOOR IS 10’‐6”.

2. STORAGE OF CEILING TILES TO PROTECT THEM FROM DAMAGE.

3. INSTALL SUPPORT STRUCTURES FOR CEILING CASSETTES.

4. HANG CEILING CASSETTES FROM SUPPORT STRUCTURES IN THE EXISTING ACOOUSTICAL

CEILING GRID.

5. CORE DRILL TWO HOLES THRU MECHANICAL AREA CMU WALL AT AN ELEVATION GREATER

THAN THE ELEVATION OF THE COMPUTER AREA CEILING. COMPUTER ROOM FLOOR IS 2x2

FLOOR TILES RAISED APPROXIMATELY 18 INCHES ABOVE CONCRETE FLOOR AND CEILING IS

APPROXIMATELY 10’‐6” HIGHER THAN RAISED FLOOR TILE.

6. HANG OR INSTALL SUPPORTS FOR CONDUIT, PIPE AND TUBING AND INSTALL ALL PIPING AND

TUBING TO INCLUDE INSULATION, SOLDERING, CONNECTIONS, AND PVC ADHESIVE.

7. LOCATE TWO PLACES IN THE SERVER ROOM FOR THE WALL CONTROLLERS (SEE DRAWING),

DRILL HOLES, AND PULL CONTROL WIRING.

8. PULL ALL WIRING FROM ELECTRICAL PANELBOARD TO CEILING CASSETTES AND CONTROL

WIRING CASSETTE‐TO‐CASSETTE AND ALL WIRING FROM CASSETTES TO MECHANICAL AREA FOR

CONDENSING UNIT.

9. PLACE AN EQUIPMENT PAD ON THE FLOOR OF THE MECHANICAL AREA INSIDE BUILDING 363

AND SIT NEW 72,000 BTUh CONDENSING UNIT ON PAD.

10. INSTALL WALL SUPPORTS FOR CONDUIT, TUBING, AND PIPING IN THE MECHANICAL AREA, ANCHOR DISCONNECT TO WALL FOR CONDENSING UNIT AND INSTALL ALL PIPING, TUBING, AND

CONDUIT INCLUDING INSULATION IF REQUIRED.

11. PULL ALL MECHANICAL AREA ELECTRICAL AND CONTROL WIRE IN CONDUIT.

12. MAKE TUBING, ELECTRICAL, AND CONTROLS CONNECTIONS TO CONDENSING UNIT,

DISCONNECT, AND PANELBOARD (INSTALL 3‐POLE BREAKER IN EXISTING PANELBOARD FOR

CONNECTION).

13. PRESSURE TEST PIPING AND HVAC EQUIPMENT TO VERIFY LEAK INTEGRITY.

14. EVACUATE REFRIGERATION SYSTEM.

15. CALCULATE REFRIGERANT CHARGE WEIGHT IN ACCORDANCE WITH MANUFACTURER’S

INSTRUCTIONS AND CHARGE WITH APPROPRIATE AMOUNT OF R410a REFRIGERANT.

16. PERFORM SYSTEM START‐UP AND OPERATIONAL TESTS TO VERIFY THAT HVAC SYSTEM

OPERATES IN ACCORDANCE WITH MANUFACTURER’S AND CUSTOMERS REQUIREMENTS.

SECTION 3

MECHANICAL PIPING

1.0 SCOPE: This section covers the mechanical piping required for use on this project to transport refrigerant and condensate to/from the HVAC system to be installed.

2.0 APPLICABLE PUBLICATIONS: Publications as referenced in each section and sub‐section of this specification form a part of the requirement for the materials to be furnished. The latest revision of each specification referenced shall apply.

3.0 MATERIALS AND EQUIPMENT:

3.1 PVC PIPE AND FITTINGS:

A. PVC PIPE: PVC pipe for this project shall be schedule 40 and schedule 80 manufactured in 20 foot lengths. Schedule 40 and schedule 80 pipe shall conform to ASTM D 1784 and ASTM D 1785.

B. PVC PIPE FITTINGS: PVC pipe fittings for this project shall conform to

ASTM D 2466.

C. PVC Pipe Solvent Cement: PVC pipe solvent cement shall comply with

ASTM D 2564.

3.1.1 General: PVC pipe use for this project is to transport condensation water from the ceiling cassette to the drainage point. Short sections of PVC pipe installed from the ceiling cassettes to the main runs shall be schedule 40 and the long sections shall be schedule 80 for rigidity. Pipe run vertically down a wall may be schedule 40, and shall be supported by clamping to the wall (See pipe hanger section). For this project pipe elbows, tees, and reducers shall be sufficient.

3.1.2 Installation: PVC pipe shall be installed in accordance with the International

Plumbing Code for the purpose of draining condensation water. In general pipe shall be installed parallel and perpendicular with existing building structure and shall be sloped 1/8” to ¼” vertical drop for each 1 foot of horizontal length from ceiling cassette.

3.1.3 Pipe joints: Pipe joints shall be socket weld type joints, and shall be cleaned, primed, and cemented in accordance with manufacturer’s requirements.

3.2 COPPER TUBING AND FITTINGS:

A. ACR Hard Copper Tube: Hard copper tubing used for this project shall conform to ASTM

B280. Tubing shall be manufactured in 20 foot lengths, nitrongenized, support a minimum pressure of 700 PSI, and be plugged at each end for cleanliness.

B. Soft Copper Tube: Soft copper tubing shall be 50 foot coils and conform to ASTM B‐280 standards. Soft copper tubing shall be in manufactured in 50 foot coils, support a minimum pressure of 700 PSI, and be capped at each end for cleanliness.

C. Copper Tube Fittings: Fittings used for ACR hard tubing or soft tubing for refrigeration and air conditioning shall meet ASTM B16.22 standards.

D. Copper Flare Fittings: Copper flare fittings for this project shall be flare nuts only and these shall be manufactured to SAE J513 standards.

E. Solder: Solder used for making brazed copper joints shall be 15 percent silver manufactured for the purpose of soldering copper to copper or copper to brass or bronze.

3.2.1 General: Hard and soft copper tubing shall be used for this project for the purpose of transporting 410A refrigerant to and from the condensing unit to the ceiling cassettes. The tubing installed from the condensing unit to the 4‐pipe headers (both liquid line and suction line) shall be ACR hard copper tubing and the tubing used to connect the ceiling cassette to the 4‐pipe headers shall be soft.

3.2.2 Hard copper tubing shall be installed in accordance with manufacturer’s recommendations and the international plumbing code and international mechanical code. Hard copper tube shall be installed parallel and perpendicular with the existing building structure.

3.2.3 Tube Joints: Hard copper tubing joints shall be made by silver soldering copper elbows, couplings, reducers, or tees to copper tubing. Soft copper tube bends may be made by hand bending the tubing (kinks in tubing shall be removed).

Copper tube joints, tube‐to‐fitting or tube‐to‐refrigeration valves shall be solder joints only. Copper tube joints made for joining tubing to ceiling cassettes may be made by flare joints. Note: The only flared tubing joints on this project are the tubing joints to the ceiling cassettes. There are no swaged joints. Tubing shall be purged with nitrogen during the soldering process.

3.3 REFRIGERATION SERVICE VALVES:

3.3.1 General: Refrigeration service valves shall be Mueller Cyclemaster refrigeration ball valves or equal. Service valves shall be full port ball valves and have a solder joint at each end for soldering to copper tubes. Valves shall be manufactured to be compatible with R410A refrigerant and shall be capable of working pressures up to 700 PSIG and temperatures up to 300 degrees. Refrigeration ball valves shall have a refrigerant access port on one or both sides of the valve. There shall be two refrigeration ball valves at each ceiling cassette (one for the liquid line and one for the suction line). There shall be one refrigeration access port

(manufactured with the valve) located between the ball valve and the ceiling cassette. The purpose of the valve is for evacuation of the refrigerant at the ceiling cassette so that the ceiling cassette may be removed/replaced from the

HVAC system and eliminating the need for total HVAC system refrigerant evacuation to perform the removal.

3.4 INSULATION AND COVERING FOR EXPOSED PIPE :

A. Tube Insulation: Tube insulation shall be closed cell foam insulation, tubular type, manufactured in six foot lengths with wall thicknesses as specified herein and shall comply with NFPA 90, UL, and ASTM C411,E 84, C 534, D1056 and G22 standards.

B. Refrigeration ball valve insulation: Refrigeration ball valves shall be covered with some type of insulation. It is preferable that they be covered with insulation provided by the valve manufacturer. An acceptable alternative would be closed cell foam tape of sufficient thickness to prevent condensation and heat transfer.

C. Insulation Adhesive: Insulation Adhesive shall comply with Military Specification MIL‐A‐

24179A as Type II and ASTM E 84. The adhesive shall perform its intended requirements for temperatures up to 250 degrees. Armaflex 520 or equal is an adhesive that would meet this requirement.

3.4.1 General: Tube insulation shall be used for the purpose of preventing thermal transfer from copper tube to air and for the prevention of condensation

(insulation shall be made with some type of antimicrobial protection). Tube insulation shall be capable of withstanding temperatures of up to 250 degrees.

All tubing, piping, and valves shall be covered with insulation (it is preferred that refrigerant valves be covered with premanufactured insulation for the purpose of covering the valve).

3.4.2 Copper Tube Insulation: Each copper tube (all liquid lines and all suction lines) whether soft or hard, shall be covered with closed cell foam insulation with a minimum wall thickness of 1/2 inch. Each refrigeration line or copper tube shall be completely covered with insulation. There shall be no bare spots. Tube insulation exposed to sunlight shall be coated with a UV protective coating.

3.4.3 Condensate pipe: Condensate drainage pipe shall be covered with closed cell foam insulation. The tubing insulation shall be of sufficient size to cover the drainage pipe and shall have a wall thickness of no less than ½”. Due to the location of this project and since it is a computer area, all condensate drainage pipe shall be covered with insulation.

3.4.4 Insulation adhesive: All insulation edges shall be coated with insulation adhesive and the insulation shall be joined together. Joining of insulation shall be performed in accordance with manufacturer’s requirements. The contractor shall have in his possession at all times an MSDS or Material Safety Data Sheet for the adhesive to be used.

4.0 QUALITY ASSURANCE PROVISIONS: The contractor shall be solely responsible for the quality of workmanship. It shall also be his responsibility to make sure that all requirements covered in this specification and on the drawings are met. Tests shall be conducted after system installation. All instruments, equipment, gauges, and labor required to properly conduct any testing shall be furnished by the contractor as part of this project contract. Test pressure gauges for a specific test shall be approved by the Contracting Officer and shall have dials indicating pressures greater than that required by the test.

Any deficiencies shall be corrected at the contractor’s expense. Failure to correct any deficiencies will be cause for rejection of the system.

4.1 Piping System Field Test: The HVAC piping system and air handlers shall be pressurized using nitrogen to a test pressure of 600 PSIG. The test pressure shall remain on the system for a period of 24 hours. The piping system shall hold the test pressure for the time frame duration to prove it’s leak free. During an overnight period it is likely that the ambient temperature will fall thereby causing the test pressure to fall. The pressure shall fall no more than 5 percent or 30 PSIG during an overnight period but shall rise from that fall in pressure the next day as ambient temperatures begin to rise. The test pressure shall rise to approximately the 600

PSIG test pressure. If a manufacturer’s standard pressure testing requirement exists then the contractor shall perform that test in lieu of that given here.

4.2 Evacuation: Upon successful completion of the pressurization testing the entire system shall be evacuated. Nitrogen shall be released from the system and test gauges shall be connected to the service ports and a vacuum pump. A micron gauge shall be included in the apparatus to indicate the evacuation. The vacuum pump shall be energized so that the pump evacuates all nitrogen, air, and any contaminants. The pump shall be allowed to run til the system is evacuated to 500 microns. Once 500 microns has been achieved, the system shall be allowed to sit for one hour. There shall be no significant rise in the micron reading. Any increase in the micron reading indicates a leak or water vapor in the system and the process shall be repeated until the system is evacuated to 500 microns and it will hold that reading for a one hour period.

4.3 Start‐up: The HVAC system shall not be started until the above two tests (4.1 and

4.2) have been successfully completed and the system has been charged with R410a refrigerant.

SECTION 4

HANGERS, INSERTS, SUPPORTS, AND FRAMING CHANNEL

1.0 SCOPE: This section covers the hangers, inserts, supports, and framing channels used to support pipe, tubing, HVAC ceiling cassettes, electrical conduit, etc.

2.0 APPLICABLE PUBLICATIONS: Publications as referenced in each section and subsection of this specification form a part of the requirements for the materials to be furnished. The latest version of each specification referenced shall apply.

3.0 MATERIALS AND COMPONENTS:

3.1 HANGERS, THREADED ROD, FRAMING CHANNEL, ETC.:

A. FRAMING CHANNEL: All framing channel (unistrut) used for this project shall be cold roll formed, 12 gauge, and have a galvanized finish. All framing channel shall be manufactured to ASTM A653 standards. Standard length for framing channel shall be 10 or 20 foot lengths. B11 channel as referenced in the drawings is for ceiling cassette supports and shall be manufactured in 20 foot lengths. B11 channel shall have a

Moment of Inertia equal to 1.12 about the x‐axis. B11, B12, and B22 framing channel are allowed on this project.

B. HANGERS: Pipe hangers shall be standard clevis type, manufactured to MSS‐SP 58 and

SP‐69; Manufacturer’s Standardization Society; Pipe Hangers and Supports‐Materials, Design, and Manufacture.

C. THREADED ROD: Threaded rod shall comply with ASTM A193. Threaded rod shall be used to hang pipe, tubing, and ceiling cassettes. Threaded rod shall be continuously threaded and shall be zinc plated. For this project all threaded rod shall be 3/8” diameter.

D. BOLTS, NUTS, WASHERS: Any bolts, nuts, or washers used for this project shall meet any requirements as stipulated by SAE standards. Bolts, nuts, or washers used for this project shall be zinc plated.

E. Clamps: For vertical wall supporting of pipe or tubing the contractor shall use framing channel (unistrut) and strut mounted clamps. Strut mounted clamps for copper refrigeration tubing shall be vibra‐clamps properly sized for the tubing to be supported.

Vibra‐clamps shall have a vibration dampening insert that clamps to the tubing wall.

3.1.1 General: Hangers, threaded rod, framing channel, etc. shall be used for the purpose of supporting PVC pipe, copper refrigeration tubing, electrical conduit, and ceiling cassettes. All pipe and tubing supports shall be new and shall be a manufacturer’s standard product. Hangers shall be of sufficient size to accommodate pipe size and insulation covering. All Pipe, tubing, and conduit may be hung or otherwise supported from existing building structure.

Due to the location of this project site, the room suspended ceiling elevation is considerably less than the building structure elevation.

For this reason it may be necessary that the contractor support pipe and tubing from the existing room wall structures.

3.1.2 Horizontal Piping: The maximum support or hanger spacing for copper tubing and PVC pipe shall be no greater than 6 feet and shall be such that there is no sagging of the pipe. Hangers or supports shall be such that they allow for adequate adjustment to slope the pipe for drainage if necessary. See Section 2 paragraph 3.1.2 for PVC pipe slope requirements. Horizontal pipe supports may be either clevis type pipe hangers hung from building structure by threaded rod, pipe hangers hung by threaded rod from unistrut, or unistrut bolted or anchored to existing building structure and pipe clamped to strut using the appropriate type strut‐clamp. If clevis‐type pipe hangers are used each hanger shall have a metallic pipe shield or protection saddle to protect the insulation from tearing or ripping.

3.1.3 Vertical Piping: Where pipe is installed vertically up a wall the pipe shall be supported by anchoring a one foot length of framing channel (unistrut) to the wall using two ¼” expansion type anchors and using strut‐clamps to clamp the pipe, tube, or conduit to the unistrut. Refrigeration copper tubing shall be clamped using vibra‐clamps. Vertical pipe supports shall be equally spaced up the wall no more than 4 feet apart, and no less than two supports per wall.

SECTION 5

HEATING, VENTILATING, AND AIR CONDITIONING EQUIPMENT

1.0 SCOPE: This section covers the heating, ventilating, and air conditioning equipment to be furnished and installed for this project.

2.0 APPLICABLE PUBLICATIONS: Publications as referenced in each section and subsection of this specification form a part of the requirement to the equipment to be furnished. The latest revision of each specification referenced shall apply.

3.0 EQUIPMENT: The HVAC equipment to be furnished for this contract shall be a VRFZ (variable refrigerant flow zoning) heat pump system consisting of one condensing unit, four suspended ceiling mounted cassette air handlers, and two wall mounted controllers. The following paragraphs give the requirements for each piece of equipment.

3.1.1 Heat Pump Condensing Unit: The heat pump condensing unit shall meet the following requirements.

A. Electrical Requirements: The condensing unit shall operate from 208 volt, three phase, 60 hertz power. Typical running load input power shall not exceed 20 amps. The contractor shall be responsible for the wiring and installation of a 30 amp, 3‐pole breaker in the existing panelboard to serve the condensing unit. 30 amps shall be the maximum overload protection device.

B. Cooling Capacity: The cooling capacity shall be a minimum of 72,000

BTUh.

C. Temperature Range for Cooling: Unit shall provide cooling when outdoor temperatures are anywhere from 25 degrees to 105 degrees

Fahrenheit (F).

D. Heating Capacity: The heating capacity shall be a minimum of 80,000

BTUh.

E. Temperature Range for Heating: The unit shall be capable of providing heating comfort when outdoor temperatures are 0 degrees to 60 degrees F.

F. Connectable Indoor Units: The condensing unit shall be capable of supporting a minimum of 36,000 BTUh and a maximum of 90,000 BTUh connected indoor air handling devices.

G. Refrigerant Pipe Connections: This shall be a two pipe system with 3/4” suction or gas line and 3/8” liquid line.

H. Condenser fan: Condenser fan shall have a Variable Frequency Drive

(VFD) of some type for energy efficiency. Fan shall operate at 0 to 100% capacity.

I. Compressor: The compressor shall be a scroll compressor and have a DC

Invertor drive and shall be capable of operating at 20 to 100%.

J. Physical Dimensions: The condensing unit shall be no greater in size than 42 inches by 42 inches by 6 Ft. high.

K. Protection Devices: The condensing unit shall have protection devices for high pressure, over‐heating, and over‐current.

L. Refrigerant Requirements: The condensing unit shall be charged with

R410a refrigerant.

3.1.2 Air Handling Units: Air handling units for this project consist of four ceiling mounted cassettes. The ceiling cassettes shall have the following characteristics.

A. Electrical Requirements: The ceiling cassettes shall operate from 208 volt, 2 phase, 60 hertz power. Typical running load input power shall not exceed 1 amp and each cassette shall have some type of overcurrent protection.

B. Cooling Capacity: The cooling capacity of each ceiling cassette shall be

12,000 BTUh.

C. Heating Capacity: The heating capacity of each ceiling cassette shall be

13,000 BTUh.

D. Physical Dimensions: The ceiling cassettes shall be of a size such that one cassette will fit in the area of a two foot square ceiling tile and be no more than 10 inches high. Typically 22.5 inches by 22.5 inches by 10 inches high.

E. Weight: The weight of the ceiling mounted cassette shall be no more than 40 pounds.

F. Fan/Airflow: The ceiling cassette shall have three speeds (low, medium, and high). The CFM’s shall be 300 to 350.

G. Refrigerant: The ceiling cassette shall operate using R410a refrigerant.

H. Pipe or Tubing Connections: The air handler shall have a 1/2" suction or gas pipe connection and 1/4" liquid line connection. Both connections shall be flare joint connections.

I. Condensation: Each air handler furnished shall have a condensate drain lift mechanism that can lift the condensate a minimum of 15 inches. If the condensate pipe connection is something other than that shown on the drawings the contractor shall be responsible for making an adaptation from ceiling cassette connection to required drain pipe size.

3.1.3 Wall Mounted Controllers: Wall mounted wired controllers shall be furnished and installed as shown on the drawings. Controllers shall be such that one controller may control one or more air handling devices. Controllers shall be capable of the following:

a. On/Off

b. Temperature Setting

c. Fan Speed

d. Operation (heat, cool, auto, dry, fan)

e. Air Flow Direction

f. Digital Display of Temperature Setting & Actual Temperature

3.1.4 Refrigerant: Refrigerant or Freon as it’s sometimes called shall be R410a and shall be contained in 25 pound cylinders. The contractor shall have in his possession at all times an MSDS or Material Safety Data Sheet for the refrigerant to be used.

3.1.5 Unit Equipment Pad: The contractor shall furnish and install a prefabricated unit pad for the condensing unit to sit on. Unit pad shall be larger in size than the condensing unit foot print but by no more than 6 to 12 inches in each direction and shall raise the condensing unit by 3 to 6 inches above the existing concrete floor.

4.0 QUALITY ASSURANCE PROVISIONS: The contractor shall be responsible for the quality of workmanship of all equipment furnished for this contract. It shall be his responsibility to make sure that all requirements as given in this specification and stated on the drawings are met. Tests shall be conducted after the all the equipment, piping, wiring, and controls have been installed and the system has been started. All instruments, test gauges, thermometers, labor etc. shall be furnished by the contractor as a part of this contract to perform the testing. Any deficiencies shall be corrected at the contractor’s expense. Failure to correct any deficiencies will be cause for rejection of the system.

4.1 Equipment Field Test: Upon system start‐up the HVAC equipment shall be tested to prove that the equipment is performing in accordance with the manufacturer’s requirements. The testing shall include pressure and temperature readings to verify that the manufacturer’s sub‐cooling and superheat requirements are met and to verify that the proper amount of refrigerant has been added to the system for the pipe lengths and sizes installed. NOTE: The contractor is responsible for performing the manufacturer’s required calculations for pipe lengths such that any required additional refrigerant is added to the system as determined by the calculation for the pipe lengths and sizes installed.

5.0 SUBMITTALS: The contractor shall furnish submittal material for the condensing unit, the ceiling cassettes, and the wall mounted controllers. The submittal material shall consist of installation and start‐up manual, operation and maintenance manual, troubleshooting requirements, and parts listing for all parts associated with the piece of equipment referenced. There shall be two printed copies of all submittal material furnished to the Contracting Officer. Additionally, there shall be one electronic copy of all submittal material furnished to the Contracting Officer in the form of a CD

(compact disc).

6.0 Warranty: All workmanship shall be warrantied by the contractor for a period of one year after final acceptance of the project. There shall be a minimum 5 year warranty on all parts for the condensing unit, the ceiling cassettes, and the wall mounted controllers. If the manufacturer’s standard warranty is something greater than 5 years then that shall be the parts warranty period but in no case shall the warranty be less than 5 years.

SECTION 6

ELECTRICAL REQUIREMENTS

1.0 SCOPE: This section covers the furnishing and installation of materials for construction and repair of general electrical and wiring systems and equipment. Products shall match existing materials and/or shall be as directed by the Contracting Officer. Installation procedures shall be in accordance with product manufacturer’s recommendations.

2.0 APPLICABLE PUBLICATIONS: Publications as referenced in each section and sub‐section of this specification form a part of the requirement for the materials to be furnished. The latest revision of each specification referenced shall apply.

3.0 PRODUCTS:

3.1 Copper Wire: Only hard drawn copper conductors shall be used and they shall comply with ASTM B 1 and ASTM B 8 as appropriate for the conductor size.

3.1.1 Rated Circuit Voltages: All wire and cable shall have minimum rated circuit voltages in accordance with Table 3‐1 of NEMA WC 70.

3.1.2 Conductors shall conform to all the applicable requirements of Section 2 of

NEMA WC 70 and shall be annealed copper.

3.1.3 Insulation: Thermoplastic insulation shall comply with NEMA WC 70. Cross‐ linked Polyethylene insulation shall comply with NEMA WC 70.

3.2 Shielded and Unshielded Cable: Since different manufacturers have different sizing and shielding requirements for control cable from wall controllers to air handling devices to condensing units, it shall be the responsibility of the contractor to install control wiring in accordance with the manufacturer’s requirements.

3.3 Conduit: Conduit shall comply with ANSI C80.1, C80.3, and C80.5, NEMA RN 1, and

NEMA FB 1 as applicable.

3.3.1 Rigid Metal conduit shall comply with UL 6.

3.3.2 EMT Conduit: EMT conduit shall comply with UL 797

3.3.3 ENT: ENT is not allowed.

3.3.4 Flexible Conduit: Flexible conduit shall meet the requirements as stated in

UL 1. Water‐tight flexible conduit shall meet the requirements as stated in

UL 360 and UL 1660.

3.4 Electrical Enclosures: General enclosures shall comply with NEMA ICS 6 and OS 1.

3.5 Wiring Devices: Wiring devices shall comply with NEMA WD 1 and NEMA WD 6 for dimensional requirements.

3.6 Enclosed Switch Box: Incoming line power fuse disconnecting units, consisting of power fuses and fuse disconnecting switches, shall comply with UL 98.

3.7 Fuse Holders and Fuses: Fuse holders and fuses shall comply with NEMA FU1 and

ANSI/UL 512 as applicable. Equipment provided under this contract shall be provided with a complete set of properly sized fuses. Fuses shall have a voltage rating of 240 volts and shall have the time current characteristics required for effective power system coordination.

3.8 Molded Case Circuit Breakers: Molded case circuit breakers shall conform to NEMA AB 1 and UL 489 and UL 877 for circuit breakers and circuit breaker enclosures. Circuit breakers may be installed in panelboards, switchboards, enclosures, motor control centers, and combination starter/disconnects. The circuit breakers shall be manually operated, shall be quick‐make, quick break, common trip type, and shall be of automatic trip type unless otherwise specified or shown on the drawings. All poles on each breaker shall be operated simultaneously by means of a common handle. The operating handles shall clearly indicate whether the breakers are in “On” or “Off” or “Tripped” position.

The circuit breakers shall be the product of only one manufacturer, and shall be interchangeable when of the same frame size. Where specified, circuit breakers shall be provided with shunt trip devices.

3.9 General Electrical: General electrical installation shall conform with the requirements of

NFPA 70, NFPA 70B, and NFPA 101.

3.10 Connectors: Connectors shall be of copper alloys for copper conductors and a type designed to minimize galvanic corrosion. All connectors shall comply with UL 486A.

3.11 Conduit Support: Metallic conduits and tubing, and the support system to which they are attached, shall be securely and rigidly fastened in place to prevent vertical and horizontal movement at intervals of not more than 10 feet and within 3 feet of boxes cabinets, and fittings with approved conduit clamps. All conduit shall be installed in accordance with the requirements of NFPA 70, National Electric Code. Conduits shall be fastened to sheet metal boxes and cabinets with two lock nuts per bushing when required by NFPA 70, otherwise one single locknut and bushing shall be sufficient.

4.0 EXECUTION:

4.1 Coordination: Contractor shall determine that the electrical wiring system has been de‐ energized. In this case, a two pole breaker exists in an existing panelboard located in the same room as the ceiling cassette installation. Reuse this existing 2‐pole breaker for power to the ceiling cassettes. Power for the condensing unit is to come from an existing panelboard located within 20 feet of the condensing unit location. Any power outage to this panelboard shall be brief and for the purpose of installing a new 3‐pole breaker to serve the new condensing unit.

4.2 Clearances: Working clearances shall comply with NFPA 70.

4.3 Grounding: Grounding shall comply with NFPA 70 and section 16390.

4.4 Wiring Methods: All wiring shall comply with NFPA 70.

4.5 Boxes and Supports: Boxes shall be provided for wiring junction and for switches. All boxes shall be in accordance with NFPA 70 and shall have a cover.

INDEX TO

TECHNICAL PROVISIONS

PO42 UPGRADE HVAC SYSTEM FOR SERVER ROOM BLDG 363

SECTION 1…………………………………………………….STATEMENT OF WORK

SECTION 2…………………………………………………….WORK ELEMENTS

SECTION 3…………………………………………………….MECHANICAL PIPING

SECTION 4…………………………………………………….HANGERS, INSERTS, AND SUPPORTS

SECTION 5…………………………………………………….HEATING, VENTILATING, AND

AIR CONDITIONING EQUIPMENT

SECTION 6…………………………………………………….ELECTRICAL REQUIREMENTS