Chiller_PM_SOW.pdf

STATEMENT OF WORK

Preventative Maintenance Services for TRANE Chillers in Buildings 215 & 225

BACKGROUND

The NIST campus has three (3) TRANE chillers that are not part of the campus central utility plant and are therefore not maintained by that Government staff. These chillers require regular contractor maintenance to operate properly.

The Building 215 chillers are operated year-round on a facility engineer-selected, lead/lag basis. These chillers provide low temperature glycol water (typical setpoint 33 F) to air-handling units throughout Buildings 215, 216, 217, 218, and 219. Condenser water is provided by a closed-loop system that circulates through reheat coils in the air-handling units throughout the stated buildings. Temperatures of this loop fluctuate on load and season. Records indicate that regular contractor-provided preventative maintenance has been provided on these chillers since at least 2010. Eddy current testing of the evaporator tubes was performed in March 2019. Chiller operation is monitored through the site building automation system (Alerton).

The Building 225 chiller is operated on an emergency basis during situations when there is a loss of campus chilled water. This is an air-cooled chiller located in an open-air enclosure at ground level. Records indicate that regular contractor-provided preventative maintenance has been provided on this chiller since at least 2010.

Chiller operation is monitored through the site building automation system (Alerton).

SCOPE OF WORK

The Contractor shall provide all personnel, equipment, supplies, transportation, tools, materials, supervision, and other items needed to provide preventative maintenance for two (2) existing water-cooled, CenTraVac chillers in Building 215 and one (1) air-cooled Series R helical rotary liquid chiller in Building 225 in accordance with manufacturer’s recommendations.

The Building 215 water-cooled chillers were manufactured by TRANE Inc and are model# CVHE050FA3H (R123 Refrigerant, Serial # L01H10174 and L01H10176). The Building 225 air-cooled chiller was manufactured by TRANE Inc. and is model# RTAC2004UL0NUAFN (R134a Refrigerant, Serial#

U0GE07366).

The contractor shall be certified by TRANE to perform work on these types and sizes of chillers. Contractor shall use only Trane-certified OEM parts unless stated in this statement of work or approved by the Contracting Officer’s Representative (COR).

PERIOD OF PERFORMANCE

The period of performance is a base period of one (1) year with up to four (4) 1-year option periods.

GENERAL REQUIREMENTS

Contractor shall adhere to requirements included in the “Guidelines for Contractors and A/E Firms Performing Site Investigations and Field Work at NIST.”

Contractor personnel shall be required to obtain a NIST badge prior to beginning work. Application forms are available from the Contracting Officer Representative (COR). Allow sixty (60) calendar days from submission of the completed forms for receipt of a NIST badge.

SPECIFIC TASKS

1. The Contractor shall provide maintenance in accordance with manufacturer’s recommendations and industry standards and at manufacturer’s recommended frequency. It shall be the responsibility of the Contractor to complete work in accordance with the manufacturer’s recommendations and Industry standards. All parts which are required for the preventative maintenance are considered to be included in the preventative maintenance cost. Additional procedures and materials may be required beyond that which are indicated herein. If any item specified herein conflicts with applicable codes and recommendations, the Contractor shall bring it to the attention of the COR for immediate resolution.

Specifically, these services shall include, but not be limited to:

Building 215

1. Check and record operating temperatures, pressures, amperages, and voltages (Quarterly)

2. Check operating safety controls (Quarterly)

3. Check and record the purge operation and controls. Check purge operating minutes/hours for leak detection. (Quarterly)

4. Review operating log with COR (Quarterly)

5. Review the chiller history for problems. Advise COR as to any deficiencies found (Quarterly)

6. Review any alarm conditions noted on the chiller’s indicator panel. Advise COR of conditions found and whether they could be remedied (Quarterly)

7. Record oil levels in the sight glasses. Check oil heater operation (Quarterly)

8. Lubricate vane control linkage, bearings, ball joints and pivot points using SAE 20 (Semi-Annually)

9. Lubricate first stage vane operator o-rings with Trane 0022 oil (Semi-Annually)

10. Lubricate the oil filter shut off valve o-ring with Trane 0022 oil (Semi-Annually)

11. Lubricate the vane shaft to protect against rust (Semi-Annually)

12. Lubricate the 1st stage IGV actuator o-rings with Trane 0022 oil (Semi-Annually)

13. Change the oil filter and purge filter (Annually)

14. Lubricate the oil valve block rotary valve o-rings (Annually)

15. Check main starter, all terminals, and heater leads for tightness and other deficiencies (Annually)

16. Check the vane positioner for proper operation (Annually)

17. Perform the maintenance required for the Purge unit per tech manual PRG-OM-6A-07281997 (Annually)

18. Confirm the accuracy of the evaporator refrigerant temperature sensor (setpoint +/- 2degF) (Annually)

19. Inspect the condenser tubes for fouling. Clean as required. (Annually)

20. Inspect and calibrate the refrigerant monitoring system. Replace filter (Annually)

21. Perform an oil analysis test on the main sump oil. For continuity reasons, the contractor shall use only the firm that performs the analysis for the campus central plant. Contact information for this firm is available from the COR (Annually)

22. Measure the compressor motor and oil pump motor windings resistance to ground (Annually)

23. Leak check the chillers. Advise COR if any leaks are found and submit a proposal to repair the leaks

24. Open, inspect, clean the water strainers (Annually)

Building 225

1. Check and record operating system subcooling, temperatures, pressures, amperages, and voltages (Quarterly)

2. Check oil sump level when off (Quarterly)

3. Observe and record liquid line sight glass on EXV (Quarterly)

4. Check operating safety controls (Quarterly)

5. Review operating log with COR (Quarterly)

6. Review the chiller history for problems. Advise COR as to any deficiencies found (Quarterly)

7. Review any alarm conditions noted on the chiller’s indicator panel. Advise COR of conditions found and whether they could be remedied (Quarterly)

8. Record oil levels in the sight glasses (Quarterly)

9. Check all piping and components for wear and any signs of corrosion. Notify COR of any deficiencies found (Quarterly)

10. Leak check the chiller. Advise COR if any leaks are found and submit a proposal to repair the leaks

11. Change the oil filter (Annually)

12. Check main starter, all terminals, and heater leads for tightness and other deficiencies (Annually)

13. Inspect the condenser coils for dirt and debris and tubes for fouling. Clean as required (Annually)

14. Perform an oil analysis test on the main sump oil. For continuity reasons, the contractor shall use only the firm that performs the analysis for the campus central plant. Contact information for this firm is available from the COR (Annually)

15. Measure the compressor motor and oil pump motor windings resistance to ground (Annually)

16. Leak check the chillers. Advise COR if any leaks are found and submit a proposal to repair the leaks

17. Open, inspect, clean all water strainers (Annually)

2. Repair and After-Hours Service Calls- Work considered to be outside of scheduled preventative maintenance shall be approved by the Contracting Officer prior to being performed. This includes costs for materials needed to complete the work. Contractor shall provide detailed pricing for necessary work to the Contracting Officer for review and approval prior to beginning work. After-hours service shall be considered anytime after 4:00pm, Monday through Friday and anytime on Saturday and Sunday.

Contractor shall provide a contact for after-hours service and be able to respond within 4 hours of an identified need.

OTHER UNIQUE REQUIREMENTS

1. The Contractor shall notify the COR of all proposed maintenance dates at least ten (10) business days in advance to allow required notification to staff. In addition, due to the limited run nature of the chiller, the Contractor shall schedule the typical maintenance work to coincide with one of the scheduled runs of the chiller at Building 225. Currently, the run is scheduled for every Tuesday morning beginning at 7:30am.

2. The Contractor shall check in with the COR when arriving and leaving site. All preventative maintenance services shall be performed during normal site hours of 7:00am to 4:30pm, Monday through Friday, exclusive of Federal holidays.

3. One of the Building 215 chillers must always be operational. If any work requires both chillers to be offline, the work must be scheduled with the COR at least ten (10) business days in advance.

4. Any required switching between operation of the two chillers in Building 215 shall be coordinated through the COR.

5. Power for the Building 215 chillers is provided by breakers in the building switchgear located remotely to the chiller room. The Contractor shall contact the COR at least one (1) business day in advance of the need to service power to the chillers’ electrical panels.

6. Disposal of Refuse: The Contractor is totally responsible for the removal of all refuse associated with this contract service. The Contractor shall remove all refuse associated with the service operations from the site and dispose of it in accordance with the requirements of the local jurisdiction.

7. Disposal of Hazardous Wastes: Any hazardous wastes generated by the Contractor shall be properly controlled and disposed by the Contractor in accordance with applicable RCRA (40CFR) and COMAR (Title 26) regulations.

8. Site Maintenance: The Contractor shall store all supplies and equipment on site so as to preclude mechanical and climatic damage. Maintain site in a neat and orderly manner.

9. Noise Control: The Contractor shall comply with all applicable local laws, ordinances, and regulations relative to noise control.

10. The Contractor shall protect the work, the site, and all existing property and structures within the limit of work or that may be affected thereby until acceptance of the work. Any damage to property shall be repaired at the Contractor’s expense, to pre-damaged condition, to the satisfaction of the COR.

11. The Contractor shall be exclusively responsible for all safety and health matters as they relate to the work. The contractor shall furnish, erect, and maintain barricades, signs, guards, or take other precautions to protect staff and visitor at NIST.

MATERIALS

1. The material and equipment furnished under this contract shall be the standard products of manufacturers regularly engaged in the production of such materials and equipment and shall be the manufacturer’s latest standard design. Material and equipment shall include manufacturer’s standard warranty.

2. All materials and equipment to be incorporated in the work shall be handled and stored by the manufacturer, fabricator, supplier and Contractor before, during and after shipment in a manner to prevent warping, twisting, breaking, rusting and any injury, theft or damage of any kind whatsoever to the materials and equipment. All materials and equipment furnished by Contractor shall be subject to inspection and approval by the COR.

3. All Chemicals shall be stored in manufacturer’s labeled containers. Provide Material Safety Data Sheets (MSDS) for COR and NIST Safety review prior to using chemicals on site.

REQUIRED DELIVERABLES

1. The Contractor shall provide the following deliverables:

i. Job Specific Safety Plan. The NIST Plant Division Safety Officer shall approve this plan before any work can commence. Contractor shall have five (5) business days after contract is signed to submit the plan to NIST. Allow ten (10) business days from submission of the completed plan for review.

ii. Report. The contractor shall provide to the COR a full written report of all work performed and time spent for each visit. All operating system data required to be recorded and equipment deficiencies shall be included in this report. This report must be submitted to the COR within 24 hours of the visit.