Revised SOW.docx

SOW FOR PROJECT

Bldg. 190 Cooling Tower Replacement 598-21-121 2200 Fort Roots, Arkansas 72114

Central Arkansas Veterans Healthcare System VISN 16, Group 598 North Little Rock, Arkansas

Prepared By CAVHS Planning and Design Office

04 March, 2021

Bldg. 190 Cooling Tower Replacement

1.0 INTRODUCTION

2.0 PROJECT LOCATION

3.0 SCOPE OF WORK

4.0 GENERAL REQUIREMENTS

5.0 EQUIPMENT SPECIFICATIONS

6.0 SUBMITTALS

7.0 PERIOD OF PERFORMANCE

8.0 HOURS OF OPERATION

9.0 KEY PERSONNEL

10.0 TYPE OF CONTRACT

11.0 COR AUTHORITY

12.0 CONTRACT AWARD MEETING

13.0 CHANGES TO REQUIREMENT

14.0 TRAVEL

15.0 WARRANTY

16.0 QUALITY CONTROL

17.0 QUALITY ASSURANCE

18.0 COMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS

19.0 SPECIAL CONSIDERATION

APPENDIX

SECTION

A. PICTURES OF LOCATION & CURRENT COOLING TOWER

B. EXISTING COOLING TOWER SPECS AND DRAWINGS

C. MANUAL FOR EXISTING WATER COOLER RECOLD JW-100C (Attached)

D. POTENTIAL NEW COOLING TOWER SPECS AND DRAWINGS

1. INTRODUCTION

The cooling tower serves as the cooling sump for the water source heat pumps in the building which includes classrooms, firing range, dormitories and other functions for the Law Enforcement Training Center. The cooling tower is malfunctioning and not serving its purpose. The project involves the demolition and replacement of the existing closed-circuit cooling tower serving Building 190 on the Fort Roots campus in North Little Rock, AR.

2. PROJECT LOCATION

Eugene J. Towbin Healthcare Center (CAVHS) Campus Bldg. 190

3. SCOPE OF WORK

This solicitation will be for the provisions as follows:

1. Provide professional services to include site investigation, scheduling, construction documents, specifications, cost estimates, construction period services and construction site visits.

2. Contractor shall include providing HVAC load calculation of the facility to determine the size of the new condenser water system.

3. Installation shall include providing a complete replacement of the condensing water system including but not limited to the cooling tower, pumps, filtration system & building, valves, strainers, piping, drainage, supporting structure, controls, access to all components, electrical hoist for appropriate component replacement, asbestos removal, electrical, architectural, all associated components necessary to provide a fully functioning system.

4. Installation shall include proper connection to existing inlet and outlet pipelines, electrical outlets, supporting structure, security, protection, drainage, etc. to support the new system and components.

5. Contractor shall perform and provide their own asbestos survey of all areas of impact and include abatement in the design and installation package.

6. Contractor Firm shall completely prepare site for building operations including demolition, removal of existing cooling tower & auxiliaries and provide all necessary piping, controls, electrical, materials, and other support to complete a turn-key replacement of the tower, repair site after the new system is fully operational. Certified, factory trained technicians shall install, test, and commission the new tower. All work shall be in accordance with NEC, ASME, ASHRAE, Infectious control, and VA guidelines.

7. All employees of general contractor and subcontractors shall comply with VA security management program and obtain permission of the VA police, be identified by project and employer, and restricted from unauthorized access.

4. GENERAL REQUIREMENTS

a. The Contractor shall provide all labor, equipment, and material.

b. The contractor shall comply with National Fire Protection Agency (NFPA 70 National Electrical Code), ANSI C2, National Electrical Safety Code (NESC), ASME, ASHRAE, Federal, State, Local, Utility provider codes, and CAVHS specifications.

c. The Contractor shall prepare a detailed Project Management Plan (PMP) to meet all objectives. For every task, the Contractor shall identify in writing all necessary subtasks (if any), associated costs by tasks, and associated dates.

d. Mechanical

a. Furnish and install new cooling tower in accordance with manufacturer’s equipment performance and specification requirements; electric disconnect on skid, and startup panel or drive with skid.

b. Existing heat pump loop piping shall be replaced from the existing isolation valves to the cooling tower. Piping shall be Schedule 40 steel with welded fittings.

c. Existing makeup water line shall be replaced from the existing isolation valve to the cooling tower. A new make-up water meter with local display and BAS connection shall be installed. Meter shall be piped in parallel with a bypass line for service of meter.

d. Existing drain and overflow piping shall be reconnected to lines serving existing tower.

e. Existing concrete maintenance pad shall be extended or replaced as required to accommodate new equipment size.

f. Contractor shall provide actuators for pump isolation valves to allow for automatic sequencing and scheduling of tower pumps. Actuator shall be connected to the existing BAS.

g. All equipment, piping, and components shall be supported and braced in accordance with seismic requirement category D.

e. Electrical

a. Contractor shall provide new disconnects, starters, wiring, conduit, and accessories as required to connect the new cooling tower, controls, and all components to the existing electrical feeds serving the existing cooling tower.

b. All electrical work will comply with the applicable National Electrical Codes and NFPA Standards.

c. All electrical gear and conduit shall be supported and braced in accordance with seismic requirement category D.

f. Automatic Temperature Controls

a. The following control points should be connected to one of the two existing campus control system/panel. Trane or Siemens

Tower Fan Speed

b. Sequence of Operation On a rise in WSHP loop temperature above the minimum cooling setpoint of 65 degrees F (adj.), the closed-circuit fluid cooler fan VFD shall be enabled. The fan speed shall be modulated to maintain the loop temperature at calculated setpoint of the ambient wet bulb temperature plus 5 degrees F. When the WSHP loop temperature falls 5 degrees F (adj.) below the minimum cooling setpoint, the fan VFD shall be disabled.

The fluid cooler spray pumps shall operate in a Lead-Lag operation where the lead spray pump is rotated on a weekly basis. The BAS shall energize the spray pump starter and open the discharge isolation valve when the fan is in operation. In the event of a spray pump motor failure, the standby spray pump shall be started automatically, and an alarm will be indicated on the operator workstation.

g. Chemical Water Treatment

a. The design conditions for the cooling tower are as indicated below

h. Equipment Characteristics A. One (1) 20 HP fan motor: Totally Enclosed Air Over (TEAO), 1 Speed / 1 Winding – Premium Efficiency (Inverter Duty), 208 V / 3 phase / 60 Hz, and Space Heater with Shaft Grounding Ring.

B. Two (2) 5 HP pump motors: Totally Enclosed Fan Cooled (TEFC) 1 speed / 1 Winding – Energy Efficient, 208 V / 3 phase / 60 Hz C. Two (2) close coupled, bronze fitted pumps with mechanical seals. Manual Valves for manual switch over and pump isolation D. CTI Certified Thermal Performance in accordance with STD-201 RS E. Type 304 Welded Stainless-Steel Construction in Basin Water – Contacted Areas, G-235 Galvanized Steel Elsewhere F. Standard Fan G. Galvanized Steel Fan Guard H. PVC Fill & Drift Eliminators I. Galvanized Steel, Full Circuit Coil J. Structure Designed in accordance with IBC and ASCE/SEI 7 K. Redundant Pump System with Standard Make-Up, Drain and Overflow Connections L. Schedule 40 PVC Spray Branches M. Mechanical Float Valve Assembly N. Electric Immersion Heaters Sized to Maintain +40 deg. F water at 0 def. F ambient O. Copper Heater Elements P. Electric Immersion Heater Controls Q. Mechanical Vibration Cutout Switch in NEMA 4X enclosure R. External Maintenance Platform with Safety Gate and Ladder Located on Louver Face of Unit meeting OSHA requirements.

S. Internal Maintenance Walkway and Ladder

5. EQUPMENT SPECIFICATIONS

1. Part 1 GENERAL

1.02 SECTION INCLUDES

A. VA MASTER SPECIFICATIONS:

· SECTION 23 05 11, COMMON WORK RESULTS fOR HVAC

· SECTION 23 65 11, COOLING TOWERS

· Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES

· Section 03 30 00, CAST IN PLACE CONCRETE

· Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS

· Section 22 10 00, FACILITY WATER REQUIREMENT

· Section 23 05 11, COMMON WORK RESULTS FOR HVAC

· Section 23 05 12, GENERAL MOTOR REQUIREMENTS FOR HVAC and STEAM

GENERATION EQUIPMENT

· Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and

EQUIPMENT

· Section 23 21 13, HYDRONIC PIPING

· Section 23 25 00, HVAC WATER TREATMENT

· Section 23 31 00, HVAC DUCTS and CASINGS

· Section 26 29 11, MOTOR CONTROLLERS

B. The General Contractor (GC) is responsible for ensuring that the specifications are tailored to the specific requirements of the project and are compatible with the current contract provision.

C. GOVERNMENT FURNISHED INFORMATION

The following is a list of government furnished information found on the VA’s Technical Information Library website (http://www.cfm.va.gov/TIL/) to be used for this project, as applicable. Sections named on (5.1.02.A) are within below VA standards.

1.03 RELATED REQUIREMENTS

1.04 REFERENCE STANDARDS

A. ABMA STD 9 - Load Ratings and Fatigue Life for Ball Bearings 2015.

B. ABMA STD 11 - Load Ratings and Fatigue Life for Roller Bearings 2014.

C. ASME B31.5 - Refrigeration Piping and Heat Transfer Components 2016.

D. ASME PTC 23 - Atmospheric Water-Cooling Equipment 2003, Reaffirmed 2014.

E. ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products 2017.

F. ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvanized) by the Hot-Dip Process 2018.

G. ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus 2018.

H. ASTM D2794 - Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) 1993 (Reapproved 2010).

I. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials 2018b.

J. ASTM G21 - Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi 2015.

K. CTI ATC-105 - Acceptance Test Code 2000.

L. CTI STD-201 OM - Operations Manual for Thermal Performance Certification of Evaporative Heat Rejection Equipment 2017.

M. CTI STD-201 RS - Performance Rating of Evaporative Heat Rejection Equipment 2017.

N. CTI STD-111 - Gear Speed Reducers for Application on Industrial Water-Cooling Towers; 2009.

O. ISO 9001 - Quality management systems -- Requirements 2015.

P. NEMA MG 1 - Motors and Generators 2017.

6. SUBMITTALS

a. See Section 013000 - Administrative Requirements, for submittal procedures.

b. Product Data: Provide rated capacities, dimensions, weights and point loadings, accessories, required clearances, electrical requirements and wiring diagrams, and location and size of field connections. Submit schematic indicating capacity controls.

c. Shop Drawings: Indicate suggested structural steel supports including dimensions, sizes, and locations for mounting bolt holes.

d. Manufacturer's Certificate: Certify that cooling tower performance, based on ASME PTC 23 meets or exceeds specified requirements and submit performance curve plotting leaving water temperature against wet bulb temperature.

e. Manufacturer's Instructions: Submit manufacturer's complete installation instructions.

f. Operation and Maintenance Data: Include start-up instructions, maintenance data, parts lists, controls, and accessories.

g. Warranty: Submit manufacturer's warranty and ensure forms have been filled out in Owner 's name and registered with manufacturer.

h. Maintenance Materials: Furnish the following for Owner 's use in maintenance of project.

i. See Section 016000 - Product Requirements, for additional provisions.

j. Extra Fan Belts: One set, matched, for each unit.

· Extra Spray Nozzles: One nozzle kit for each cell.

· Extra Access Door Gaskets: One for each door.

· Extra Valve Seats: One for each make-up valve and control valve.

7. PERIOD OF PERFORMANCE

The project start date shall be within five days after notice to proceed work. The period of performance is 60 days following Lead time to buy equipment (About 10 weeks lead time). If for any reason a deliverable cannot be delivered as scheduled, the Contractor is required to submit a request for a time extension to the Contracting Officer and the COR. The request must include the reason(s) for the delay, the impact on the overall project, and the impact on the cost of the project. The Contracting Officer will consider each request based on its merits and will, if approved, issue a modification to the contract. The Contractor is required to proceed as originally scheduled until such modification is issued. The Contracting Officer is the only official authorized to make changes to the contract.

8. HOURS OF OPERATION

Except as otherwise set forth in this agreement or for scheduled maintenance, the Contractor shall conduct work during CAVHS’ normal business hours and weekends. Generally, these normal business hours are Monday through Friday from 7:00 AM to 4:30 PM for the time zone of the RPO. The Contractor needs to work VA personnel to minimize impact to the LETC Training Center.

9. KEY PESONNEL

Approval of Key Personnel, as specified in Contractor’s Technical Proposal who will be working on this project, must be obtained from the Government within five business days of any change in these Key Personnel. The Contractor’s Project Manager is a Key Person as defined by this section.

10. TYPE OF CONTRACT

This is a firm fixed price contract.

11. COR Authority

In no event is the COR empowered to change any of the terms and conditions of the contract. All changes, to any section of this contract, shall be made only by the Contracting Officer pursuant to a properly executed modification. The types of actions within the purview of the COR’s authority are to ensure that the Contractor performs the technical requirements of the contract, and to notify the Contracting Officer of any deficiencies observed. A Letter of Designation shall be issued to the COR and a copy shall be sent to the Contractor at the time of contract kickoff meeting or post-award conference setting forth in full the responsibilities and limitations of the COR.

12. CONTRACT AWARD MEETING

The Contractor shall not commence performance on this contract until the Government has conducted a contract kickoff meeting, post-award conference or the COR has advised the Contractor that a kickoff meeting is waived.

13. CHANGES TO REQUIREMENT

Any changes to this solicitation shall be approved through written correspondence from the Contracting Officer.

14. TRAVEL

There is no travel associated with this contract.

15. WARRANTY

· The contractor shall provide a one-year manufacturer’s warranty on all parts, and labor.

· The warranty shall include travel and shipping costs associated with any warranty repair.

· Fans, fan shafts, bearings, sheaves, gearboxes, drive shafts, couplings, and mechanical equipment support must be warranted against defects in materials and workmanship for a period of seven (7) years from date of shipment.

16. QUALITY CONTROL

After contract award, the Contractor shall implement and follow the Quality Control Plan (QCP) or Quality Assurance and Surveillance Plan (QASP) that it submitted as part of its proposal and accepted by the Government.

Field Quality Control:

· Provide the services of the manufacturer's field representative to inspect tower after installation and submit report prior to start-up, verifying installation is in accordance with specifications and manufacturer's recommendations.

· Start-up tower in presence of and instruct Owner’s operating personnel.

17. QUALITY ASSURANCE

As stated in the Quality Control Plan or QASP, the Government shall evaluate the Contractor's performance under this agreement. For those tasks listed in the Quality Control Plan or QASP, the COR or evaluators shall follow the methods of surveillance specified in this agreement.

Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum ten (10) years of documented experience and ISO 9001 certification.

Installer Qualifications: Company specializing in performing the type of work specified in this section with minimum five (5) years of experience and approved by manufacturer.

18. COMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS

The Contractor shall ensure that services provided to the Government under this agreement comply with all applicable laws, statutes, regulations, and guidelines that govern the operation of systems by the Government.

Products Requiring Electrical Connection: Listed and classified by Underwriters Laboratories Inc. as suitable for the purpose specified and indicated.

19. SPECIAL CONSIDERATION

All contractors and visitors are required to adhere to Universal Masking Guidance which requires people to wear a cloth face covering or facemask over their mouth and nose while in any building of Central Arkansas Veterans Healthcare System (CAVHS). Daily healthcare screening is required before entrance to VA facilities due to COVID-19. No one with a cold or flu like symptoms will be allowed on VA property. In the event that symptoms occur while on site, the contractor will notify the COR immediately. The individual(s) maybe required to be COVID tested and quarantine until released by Infection Control to return to site.

APPENDIX

A. PICTURES OF LOCATION & CURRENT COOLING TOWER

Picture 1. Location of Bldg. 190 Cooling Tower

Picture 2. Bldg. 190 Cooling Tower

Picture 2. Bldg. 190 Cooling Tower (another view)

Picture 3. Bldg. 190 Cooling Tower (Zoom-In)

Picture 4. Bldg. 190 Cooling Tower (Zoom-In)

B. EXISTING COOLING TOWER SPECS AND DRAWINGS

TABLE 1. Bldg. 190 Cooling Tower

DRAWING 1. Bldg. 190 Cooling Tower Drawings

C. POTENTIAL NEW COOLING TOWER SPECS AND DRAWINGS

TABLE 2. New Cooling Tower Specs

DRAWING 2. New Cooling Tower Specs and Dr image1.png image2.emf image3.png image4.png image5.png image6.png image7.png image8.png image9.png image10.png image11.png image12.png image13.png