FA667519RA012_Multiple_HVAC_Repairs_Statement_of_Work_11Apr2019.pdf

REPAIR HVAC SYSTEMS AT MULTIPLE FACILITIES

NAVAL AIR STATION

FORT WORTH JOINT RESERVE BASE

April 2019

STATEMENT OF WORK: PROJECT # DDPM18-0011

REPAIR/MAINTAIN HVAC SYSTEMS AT MULTIPLE FACILITIES (BUILDINGS 1191,

1194, 1235, 1236, 1420, 1604, 1615, 1619, 1628, 1642, 1643, 1648, 1650, 1651, 1654, 1655, 1660, 1700, 1710, 1780, 1790, and 1792)

OVERVIEW:

Currently, there are multiple facilities at NAS Fort Worth JRB Texas that have Heating, Ventilating and Air Conditioning (HVAC) systems that are dilapidated, inoperable and beyond their lifecycle. The existing units require maintenance, repair or replacement, and the closed loop hydronic systems require maintenance.

SCOPE OF WORK

The Scope of Work (SOW) is stated in terms of general and specific conditions. Any work not specifically stated, but necessary to achieve the goals of the project and/or required by code shall be completed by the Contractor.

The Contractor shall furnish all labor, parts, materials, tools, equipment, transportation, personnel, supervision and other items and services necessary to maintain, repair or replace HVAC systems at multiple facilities located on the Naval Air Station Fort Worth Joint Reserve Base. Additionally, all work done shall be specified by this SOW and in coordination with the Contracting Officer (KO). The Government shall not exercise any supervision or control over the contract delivery providers performing herein.

The Contractor shall field verify unit models and serial numbers listed in Appendix A, which is for reference only. The Contractor shall notify the KO of any discrepancies before initiating work.

Replace HVAC systems at buildings 1655 (3), 1236, 1619, 1650 (2), 1642, 1235, 1780, and 1420. Service and diagnose Variable Refrigerant Flow (VRF) systems at buildings 1643 (2), 1651, and 1660.

Provide water system analysis and clean strainers for chilled water closed loop systems at buildings 1191, 1235, 1654, 1655, 1700, 1780, and 1790. Provide water system analysis and clean strainers for hot water closed loop systems at buildings 1191, 1194, 1235, 1420, 1604, 1615, 1628, 1648, 1650 (2), 1654, 1655 (2), 1700, 1710, 1780, 1790, and 1792. Reverse flush all the above chilled and hot water closed loop systems except the chiller loops at buildings 1700 and 1790. Chemically treat all the above closed loop systems.

Perform chiller preventative maintenance for buildings 1191, 1235, 1654, 1655, 1700, 1780, and 1790. Perform boiler preventative maintenance at Buildings 1191, 1194, 1235, 1420, 1604, 1615, 1628, 1648, 1650 (2), 1654, 1655 (2), 1700, 1710, 1780, 1790, and 1792.

All R-22 refrigerant from demolished units must be captured by the Contractor and returned to the government, using Contractor purchased/provided recovery cylinders. The technician shall be an EPA Section 608 certified technician, and shall provide reporting data for each facility including make, model, serial number, and corresponding amount of refrigerant reclaimed from each unit. The recovery cylinders shall be marked with nonpermanent labels to include the same data.

HVAC Repairs:

The Contractor shall furnish all services necessary to repair HVAC systems as specified for buildings 1655 (3), 1236, 1619, 1650 (2), 1642, 1235, 1780, 1643 (2), 1651, 1660, and 1420.

SCOPE OF WORK B1655:

The Contractor shall furnish all services necessary to replace (two) 2 air handler units (AHU), (one) 1 rooftop split unit, chilled/hot water reverse flush, air cooled chiller maintenance, boiler maintenance, and chemical treatment at Building 1655. Maintenance instructions will follow the repair instructions.

Building 1655 – Demolition Phase (2 – 15-Ton Air Handler Units)

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government

1. The Contractor shall reclaim all R-22 refrigerant.

2. The Contractor shall disconnect, remove and discard the existing two 20-ton air handling units.

Building 1655 – Installation Phase (2 – 15-Ton Air Handler Units)

1. The Contractor shall purchase and install two (2) new 15-Ton AHUs matching the existing condenser units. The units shall include hot water coils, and be BACnet compatible.

2. The Contractor shall pressure test the system after installation to ensure balance and system performance.

3. The Contractor shall flush existing line set utilizing RX11 flush.

4. The Contractor shall install new in-line refrigerant dryers.

5. The Contractor shall perform a complete evacuate on the HVAC system ensuring that the systems is free of any air or moisture.

6. The Contractor shall insulate all exposed AHU hot water and refrigerant piping.

7. The Contractor shall program the unit to fully integrate into facility operations/controls.

8. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as well as ensure the equipment is in proper working condition before completion of project.

9. The Contractor shall prepare an acceptance test report documenting the results of the startup for the day testing was done. Results are to be submitted to the KO before project completion.

10. The Contractor shall evaluate the system for any other issues and provide a quote for deficiencies found.

Note: Prior to installation, the new AHUs and all related appurtenances and material selections shall be approved by the KO.

Building 1655 – Demolition Phase (4-Ton Rooftop Split System & Supporting Utilities)

1. Disconnect, remove and properly dispose of current 4-Ton rooftop split unit and condenser.

Note: It shall be the Contractor’s responsibility to remove the system from the roof and transport the current 4-Ton unit to an off-base location for proper disposal or recycling.

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government.

Building 1655 – Installation Phase (4–Ton Rooftop Split System & Supporting Utilities)

1. The Contractor shall purchase and install one (1) 4-Ton R-410 rooftop split system

(packaged AHU and condenser are roof mounted) to match existing units. The units selected shall be rated at 460V, 3-phase, 60 Hz and be BACnet compatible.

2. The newly installed unit shall match the current curb footprint or Contractor shall provide a curb adapter for the new unit.

3. The Contractor shall replace boots and refill pots at roof penetrations necessitated by the HVAC system/utilities.

4. The Contractor shall provide all electrical connections.

5. The Contractor shall provide all condensate connections.

6. The Contractor shall program the unit to fully integrate into facility

7. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as well as ensure the equipment is in proper working condition before completion of project.

8. The Contractor shall prepare an acceptance test report documenting the results of before project completion. Only a fully successful test result shall be accepted.

Note: Prior to installation, the new package units and all related appurtenances and

SCOPE OF WORK B1236:

The Contractor shall furnish all services necessary to replace the existing 10-Ton R-22 split system at Building 1236.

Building 1236 – Demolition Phase (10-Ton Split System & Supporting Utilities)

1. Disconnect, remove and properly dispose of current 10-Ton split unit and

Note: It shall be the Contractor’s responsibility to remove the condenser and evaporator units and transport the current system to an off-base location for proper disposal or recycling.

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government.

Building 1236 – Installation Phase (10-Ton Split System & Supporting Utilities)

1. The Contractor shall purchase and install one (1) 10-Ton R-410 split system to match existing system. The unit selected shall be rated at 208/230V, 3-phase, 60 Hz and be BACnet compatible.

2. The newly installed units shall match the current footprints/layout.

3. The Contractor shall provide all electrical connections.

4. The Contractor shall provide all condensate connections.

5. The Contractor shall program the unit to fully integrate into facility

6. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as

7. The Contractor shall prepare an acceptance test report documenting the results of

SCOPE OF WORK B1619:

The Contractor shall furnish all services necessary to replace one (1) 7.5-Ton R-22 packaged air handler and condenser at Building 1619.

Building 1619 – Demolition Phase (7.5-Ton Packaged Air Handler, Condenser & Supporting Utilities)

1. Disconnect, remove and properly dispose of current 7.5-Ton AHU and

Note: It shall be the Contractor’s responsibility to remove the AHU and condenser units and transport the current system to an off-base location for proper disposal or recycling.

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government.

Building 1619 – Installation Phase (7.5-Ton Packaged Air Handler, Condenser & Supporting Utilities)

1. The Contractor shall purchase and install one (1) 7.5-Ton R-410 split system to match existing system. The unit selected shall be rated at 208/230V, 3-phase, 60 Hz and be BACnet compatible.

5. The Contractor shall program the unit to fully integrate into facility

6. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as

SCOPE OF WORK B1650:

The Contractor shall furnish all services necessary to replace (one) 1 rooftop packaged air handler unit (AHU), (one) 1 rooftop split condenser, chilled/hot water reverse flush, air cooled chiller maintenance, boiler maintenance, and chemical treatment at Building 1655.

Maintenance instructions will follow the repair instructions.

Building 1650 – Demolition Phase (2-Ton Rooftop Split Unit & Supporting Utilities)

1. Disconnect, remove and properly dispose of current 2-Ton rooftop split

Note: It shall be the Contractor’s responsibility to remove the system from the roof and transport the current 2-Ton unit to an off-base location for proper disposal or recycling.

government.

Building 1650 – Installation Phase (2–Ton Rooftop Split System & Supporting Utilities)

1. The Contractor shall purchase and install one (1) 2-Ton R-410 rooftop split condenser to match existing unit. The unit shall be BACnet compatible.

2. The Contractor shall restore roof integrity at roof penetrations necessitated by the HVAC system/utilities.

4. The Contractor shall program the unit to fully integrate into facility

5. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as

6. The Contractor shall prepare an acceptance test report documenting the results of

Building 1650 – Demolition Phase (3.5 -Ton Unit & Supporting Utilities)

1. Disconnect, remove and properly dispose of current 3.5-Ton Rooftop package unit.

Note: It shall be the Contractor’s responsibility to remove the unit from the roof and transport the current 3.5 -Ton unit to an off-base location for proper disposal or recycling.

Building 1650 – Installation Phase (3.5 –Ton Rooftop Package Unit & Supporting Utilities)

1. The Contractor shall purchase and install one (1) 3.5-Ton R-410 Rooftop package unit to match existing unit. The unit selected shall be rated at 208/230V, 1-phase, 60 Hz and be BACnet compatible.

2. The newly installed unit shall match the current curb footprint or Contractor shall provide a curb adapter for the new unit.

5. The Contractor shall provide all natural gas connections.

6. The Contractor shall program the unit to fully integrate into facility

7. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code

8. The Contractor shall prepare an acceptance test report documenting the results of

SCOPE OF WORK B1642:

The Contractor shall furnish all services necessary to replace the existing 4-Ton R-22 split system at Building 1642.

Building 1642 – Demolition Phase (4-Ton Split System)

1. Disconnect, remove and properly dispose of current 4-Ton split unit and

Note: It shall be the Contractor’s responsibility to remove the condenser and evaporator units and transport the current system to an off-base location for proper disposal or recycling.

Note: All R-22 refrigerant must be captured by the Contractor and returned to the

Building 1642 – Installation Phase (4-Ton Split System)

1. The Contractor shall purchase and install one (1) 4-Ton R-410 split system to match existing system. The unit shall be BACnet compatible.

4. The Contractor shall provide all condensate connections.

5. The Contractor shall program the unit to fully integrate into facility operations/controls.

6. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code

SCOPE OF WORK B1235:

The Contractor shall furnish all services necessary to replace (one) 1 boiler control, (one) high/low gas switch, chilled/hot water reverse flush, air cooled chiller maintenance, boiler maintenance, and chemical treatment at Building 1655. Maintenance instructions will follow the repair instructions.

Building 1235 – Demolition Phase (AO Smith GW-500 400/Serial Number 1102M000961)

1. The Contractor shall remove and discard one (1) High/Low Gas-Pressure Switch.

2. The Contractor shall remove and provide to KO one (1) Boiler Control Module.

Note: The Contractor shall provide the old control unit to KO.

Building 1235 – Installation Phase (AO Smith GW-500 400/Serial Number 1102M000961)

1. The Contractor shall purchase and install one (1) new High/Low Gas-Pressure

Switch to match existing unit.

2. The Contractor shall purchase and install one (1) Boiler Control Module to match the existing unit.

3. The Contractor shall program the unit to fully integrate into facility

4. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as

Note: The new B1235 switch, controls and other related material selections shall be approved by the KO before work is to begin.

SCOPE OF WORK B1780:

The Contractor shall furnish all services necessary to replace (one) 1 boiler control, (one) flow switch, chilled/hot water reverse flush, air cooled chiller maintenance, boiler maintenance, and chemical treatment at Building 1780. Maintenance instructions will follow the repair instructions.

Building 1780 – Demolition Phase (RAYPAK H9-1262B/Serial Number 1109328943)

1. The Contractor shall remove and discard one (1) Water Flow Switch.

2. The Contractor shall remove and provide to KO one (1) Boiler Control Module.

Note: The Contractor shall provide the old control unit to KO.

Building 1780 – Installation Phase (RAYPAK H9-1262B/Serial Number 1109328943)

1. The Contractor shall purchase and install one (1) new Water Flow Switch to match existing unit.

2. The Contractor shall purchase and install one (1) Boiler Control Module to match the existing unit.

3. The Contractor shall program the unit to fully integrate into facility operations/controls.

4. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code

Note: The new B1780 switch, controls and other related material selections shall be approved by the KO before work is to begin.

SCOPE OF WORK B1643:

The Contractor shall furnish all services necessary to service and run diagnostic testing for the Variable Refrigerant Flow systems including 32 Fan Coil Units (FCUs) at Building 1643.

Building 1643 – Service (LG ARUB072DTE4/SN 401KAGS00015, LG

ARUB144DTE4/SN 308KAKN00045, LG ARUB168DTE4/SN 308KAED00020)

1. Conduct leak tests and repair leaks.

2. Ensure electronic components are free of dust/buildup.

3. Confirm systems are bonded to mitigate electrical surges.

4. Clean condenser coils per manufacturers recommendations.

5. For 32 indoor fan coil units:

• Clean exterior and remove dirt from grille.

• Clean air filter.

• Clean the condensate drain pan.

• Clean the condensate drain pipe.

• Thoroughly clean the heat exchanger.

6. Perform service test, operate, and log operation.

7. Provide written report of work completed and document alarms, system status, and defective components.

8. All deficiencies shall be reported with cost estimates for repairs to the Contracting

Officer within two working days.

SCOPE OF WORK 1651:

for the Variable Refrigerant Flow systems including 14 AHUs and 6 cassette units at Building 1651.

Building 1651 – Service (Trane 4TVR0168B300NC/SN’s 1539S1086X Trane 4TVR0168B300NC and 1539S1075X)

2. Ensure electronic components are free of dust/buildup.

3. Confirm systems are bonded to mitigate electrical surges.

4. Clean condenser coils per manufacturers recommendations.

5. For 14 AHUs and 6 cassette units:

• Clean exterior and remove dirt from grille.

• Clean air filter.

• Clean the condensate drain pan.

• Clean the condensate drain pipe.

• Thoroughly clean the heat exchanger.

6. Perform service test, operate, and log operation.

7. Provide written report of work completed and document alarms, system status, and defective components.

8. All deficiencies shall be reported with cost estimates for repairs to the Contracting

SCOPE OF WORK 1660:

for the Variable Refrigerant Flow systems including 15 cassette units at Building 1660.

Building 1660 – VARIABLE REFRIGERANT FLOW (VRF) Service (SAMSUNG MODEL AM096FXVAFR/SN BOZXP3GD300005 and AM072FXVAFR/SN BOZTP3GF100005Z)

2. Purge refrigerant.

3. Replace up to 150 lbs of refrigerant. If additional refrigerant required, contact KO to complete charging with Government provided refrigerant.

4. Ensure electronic components are free of dust/buildup.

5. Confirm systems are bonded to mitigate electrical surges.

6. Clean condenser coils per manufacturers recommendations.

7. For 15 cassette units:

• Clean exterior and remove dirt from grille.

• Clean air filter.

• Clean the condensate drain pan.

• Clean the condensate drain pipe.

• Thoroughly clean the heat exchanger.

8. Perform service test, operate, and log operation.

9. Provide written report of work completed and document alarms, system status, and defective components.

10. All deficiencies shall be reported with cost estimates for repairs to the Contracting

SCOPE OF WORK B1420:

The Contractor shall furnish all services necessary to replace (one) 1 high bay hydronic heater blower motor (north unit) and service (two) 2 hydronic high bay heater units.

Building 1420 – Demolition Phase (North High Bay Hydronic Unit)

1. The Contractor shall remove and discard one (1) fan motor.

Building 1420 – Repair/Service Phase (North and South High Bay Hydronic Heating Units)

1. The Contractor shall purchase and install one (1) new fan motor to match existing motor on the north high bay hydronic heating unit.

2. The Contractor shall service the north and south high bay hydronic heating units, including coil cleaning, belt tensioning, and lubrication.

3. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as

Note: Prior to installation, the new motor shall be approved by the KO.

CHILLER/BOILER WATER TREATMENT

The services of a company regularly engaged in the treatment of chilled water systems shall be used to determine the correct chemicals required and treat the systems. The chemical treatment and services provided shall meet the requirements of this specification as well as the recommendations from the manufacturers of the condenser and evaporator coils.

Chemicals shall meet all required federal, state, and local environmental regulations for the treatment of evaporator coils and direct discharge to the sanitary sewer. Acid treatment, proprietary chemicals, and products containing equivalent chromium (CPR) shall not be used.

Install 5 gallon dome bottom filter feeder with isolation and drain valves in bypass configurations as needed to provide means for chemical treatment, including buildings 1191 (chiller loop), 1650 (chiller loop), and 1604 (boiler loop).

CHILLED/BOILER WATER FLUSH AND TREATMENT

Provide water system analysis and clean strainers for chilled water closed loop systems at buildings 1191, 1235, 1654, 1655, 1700, 1780, and 1790. Provide water system analysis and clean strainers for boiler closed loop water systems at buildings 1191, 1194, 1235, 1420, 1604, 1615, 1628, 1648, 1650 (2), 1654, 1655 (2), 1700, 1710, 1780, 1790, and 1792.

Reverse flush chilled water closed loop systems at buildings 1191, 1235, 1654, 1655, and 1780. Reverse flush boiler closed loop water systems at buildings 1191, 1194, 1235, 1420, 1604, 1615, 1628, 1648, 1650 (2), 1654, 1655 (2), 1700, 1710, 1780, 1790, and 1792.

Treat water closed loops to inhibit corrosion, scale, and biological formations for all the aforementioned systems.

1. The water systems shall be analyzed by the water treatment company. Submit for approval the specified water quality test reports. The analysis and resulting reports shall include the following information recorded in accordance with ASTM D596 (Appendix B):

2. Open and Clean Wye Strainer. The Contractor shall:

• Open Strainer.

• Completely clean to “Like New” condition.

• Ensure completed work meets Manufacturers Specifications.

3. Reverse Flush Heat Exchanger and AHU Coil. The Contractor shall:

• Reverse Flush Heat Exchanger and coils to remove accumulated debris within circulation loop. Flush piping system using a minimum velocity of 4 fps though all portions of the piping system. Flushing shall be continued until discharge water shows no discoloration and strainers are no longer collecting dirt and other foreign materials. The contractor shall perform operation to demonstrate residual particulate levels meet manufacturer recommended standards for efficient system operation.

• Clean strainer.

• Ensure completed work meets Manufacturers Specifications.

4. Add Bactericide to Closed Loop Chiller Systems: At the chemical injection port, the Contractor shall:

• Apply manufacturer recommended Bactericide for a minimum 3 hours and flush system for 24 hours kill and clear bacteria growth in the closed loop system.

• After restoring circulation water, adding bacteria inhibitor, perform air bleed off for a minimum of 24 hours to evacuate residual air from the system.

• Add inhibitor and test for proper ppm to meet manufacturer preventative maintenance standards.

5. Treat chilled and hot water systems with a molybdate type treatment. Molybdate treatment shall be maintained at the limits of 100 to 125 ppm molybdate, 40 - 50 ppm copper corrosion inhibitor (TT or MBT), and pH of 8.0 to 9.0. Maintain the AERCO Modulex Unical boilers at buildings 1194, 1604, 1628, 1650, and 1655 pH between 6.5 and 8 to protect aluminum components.

6. Ensure completed work meets Manufacturers Specifications.

7. Provide a written report of all work and tests performed.

CHILLER PREVENTATIVE MAINTENANCE

Perform chiller preventative maintenance for Buildings 1191, 1235, 1654, 1655, 1700, 1780, and 1790.

Buildings 1191, 1655, 1700, 1780, and 1790 – Perform Carrier 30RAP recommended maintenance to include:

1. Verify operation of chiller and contact KO if there are any discrepancies that will interfere with completion of maintenance.

2. Clean condenser coils per manufacturers recommendations.

3. Check all electrical connections; tighten as necessary.

4. Inspect all contactors and relays, replace as necessary.

5. Check moisture indicating sight glass for possible refrigerant loss and presence of moisture.

6. Check refrigerant charge.

7. Check all refrigerant joints and valves for refrigerant leaks, repair minor leaks.

Report any large leaks to the KO.

8. Check refrigerant level and correct charge to proper level (Government will provide refrigerant).

9. Check chilled water flow switch operation.

10. Check all condenser fans for proper operation.

11. Check compressor oil level.

12. Check crankcase heater operation if equipped.

13. Check accuracy of thermistors, report if greater than ± 2° F (1.2° C) variance from calibrated thermometer.

14. Verify that the chilled water loop is properly treated.

15. Check refrigerant filter driers for excessive pressure drop, report if excessive.

16. Check chilled water strainers, clean as necessary.

17. Check chilled water flow switch sensor tip for buildup. Clean if necessary.

18. Check cooler heater operation.

19. Check condition of condenser fan blades and that they are securely fastened to the motor shaft.

20. Perform Service Test to confirm operation of all components and log operation.

21. Check for excessive cooler approach (Leaving Chilled Water Temperature —

Saturated Suction Temperature) which may indicate fouling. Clean cooler vessel.

22. Repair or replace any insulation that must be removed during work.

23. Contractor shall be responsible for maintaining cleanliness of mechanical room/pads during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

24. Provide written report of work completed and indicate all detected deficiencies.

25. All deficiencies shall be reported with cost estimates for repairs to the KO within two working days.

Building 1654 – Perform Carrier 30RBA recommended maintenance to include:

1. Verify operation of chiller and contact KO if there are any discrepancies that will interfere with completion of maintenance.

2. Clean condenser coils per manufacturers recommendations.

3. Check all electrical connections, tighten as necessary.

4. Inspect all contactors and relays, replace as necessary.

5. Check moisture indicating sight glass for possible refrigerant loss and presence of moisture.

6. Check refrigerant charge.

7. Check all refrigerant joints and valves for refrigerant leaks, repair minor leaks.

Report any large leaks to the KO.

8. Check refrigerant level and correct charge to proper level (Government will provide refrigerant).

9. Check chilled water flow switch operation.

10. Check all condenser fans for proper operation.

11. Check compressor oil level.

12. Check crankcase heater operation if equipped.

13. Check accuracy of thermistors, report if greater than ±2° F (1.2° C) variance from calibrated thermometer.

14. Check accuracy of transducers, report if greater than ±5 psi (34.47 kPa) variance.

15. Verify that the chilled water loop is properly treated.

16. Check refrigerant filter driers for excessive pressure drop, report if excessive.

17. Check chilled water strainers, clean as necessary.

18. Check chilled water flow switch sensor tip for buildup. Clean if necessary.

19. Check cooler heater operation.

20. Check pump heater operation, if equipped.

21. Check condition of condenser fan blades and that they are securely fastened to the motor shaft.

22. Perform Service Test to confirm operation of all components and log operation.

23. Check for excessive cooler approach (Leaving Chilled Water Temperature —

Saturated Suction Temperature) which may indicate fouling. Clean cooler vessel.

24. Repair or replace any insulation that must be removed during work.

25. Contractor shall be responsible for maintaining cleanliness of mechanical room/pads during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

26. Provide written report of work completed and indicate all detected deficiencies.

27. All deficiencies shall be reported with cost estimates for repairs to the KO within

Building 1235 – Perform Daikin recommended maintenance to include:

1. Verify operation of chiller and contact KO if there are any discrepancies that will interfere with completion of maintenance or if any actions may void the manufacturer’s warranty.

2. Complete unit log and review.

3. Visually inspect unit for loose or damaged components.

4. Inspect thermal insulation for integrity. Clean unit.

5. Check terminals for tightness; tighten as necessary.

6. Clean control panel interior.

7. Visually inspect components for signs of overheating.

8. Verify compressor heater operation.

9. Test and calibrate equipment protection and operating controls.

10. Megger compressor motor. Never Megger motors while they are in vacuum to avoid damage to the motor.

11. Leak test.

12. Check sight glasses for clear flow.

13. Check filter-drier pressure drop (see manual for spec), report if excessive.

14. Perform compressor vibration test.

15. Acid test oil sample.

16. Clean condenser coils per manufacturer recommendations with approved chemicals.

17. Check fan blades for tightness on shaft. Be sure fan motors are electrically locked out before proceeding.

18. Check fans for loose rivets and cracks.

19. Check coil fins for damage.

20. Repair or replace any insulation that must be removed during work.

21. Contractor shall be responsible for maintaining cleanliness of mechanical room/pads during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

22. Provide written report of work completed and indicate all detected deficiencies.

23. All deficiencies shall be reported with cost estimates for repairs to the KO within two working days.

BOILER PREVENTATIVE MAINTENANCE

Perform boiler preventative maintenance and test all safety devices for 18 boilers at Buildings 1191, 1194, 1235, 1420, 1604, 1615, 1628, 1648, 1650 (2), 1654, 1655 (2), 1700, 1710, 1780, 1790, and 1792.

Buildings 1191 and 1615 Lochinvar Boiler Maintenance to include:

1. Verify operation of boiler and contact KO if there are any discrepancies that will interfere with completion of maintenance.

2. Inspect interior; clean, and vacuum.

3. Check for leaks (water, gas, flue).

4. Examine venting system.

5. Check relief valve.

6. Check system water pressure/ system piping/expansion tank.

7. Check fill water meter.

8. Test boiler water. Clean system water with approved system restorer following manufacturer's information.

9. Check control settings.

10. Check wiring and connections.

11. Inspect flame for stability and uniformity.

12. Check flue gas passageways.

13. Inspect and clean the burner.

14. Perform start-up check out and performance per manufacturer service manual.

15. Clean heat exchanger.

16. Remove and wash burner.

17. Check appliance area.

18. Check pressure/temperature gauge.

19. Test low water cutoff (if used) and reset button.

20. Repair or replace any insulation that must be removed during work.

21. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

22. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

23. Provide written report of work completed and indicate all detected deficiencies.

24. All deficiencies shall be reported with cost estimates for repairs to the KO within

Buildings 1650 and 1654 Lochinvar Boiler Maintenance to include:

2. Inspect interior; clean, and vacuum.

3. Check for leaks (water, gas, flue).

4. Examine venting system.

5. Check air piping.

6. Check relief valve.

7. Check system water pressure/ system piping/expansion tank.

8. Check fill water meter.

9. Test boiler water. Clean system water with approved system restorer following manufacturer's information.

10. Check control settings.

11. Check wiring and connections.

12. Inspect flame for stability and uniformity.

13. Check flue gas passageways.

14. Check manifold gas pressures.

15. Inspect and clean the burner. Remove and clean using water. Dry before reassembling.

16. Perform start-up check out and performance per manufacturer service manual.

17. Clean heat exchanger with a stiff bristle brush.

18. Clean the blower wheel with a brush and vacuum. Do not let dirt from cleaning get pulled into the blower.

19. Check appliance area.

20. Check pressure/temperature gauge.

21. Test low water cutoff (if used) and reset button.

22. Repair or replace any insulation that must be removed during work.

23. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

24. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

25. Provide written report of work completed and indicate all detected deficiencies.

26. All deficiencies shall be reported with cost estimates for repairs to the KO within

Buildings 1648, 1790, and 1792 Lochinvar Boiler Maintenance to include:

2. Inspect interior; clean, and vacuum.

3. Clean condensate trap and fill with fresh water.

4. Check for leaks (water, gas, flue, condensate).

5. Verify flue and air lines in good condition and sealed tight.

6. Check system water pressure/system piping/expansion tank.

7. Check fill water meter.

8. Test boiler water. Clean system water with approved system restorer following manufacturer's information.

9. Check control settings. Check ignition and flame sense electrodes (sand off any deposits; clean and reposition).

10. Check wiring and connections.

11. Perform start-up checkout and performance verification per Section 10 in the

FTXL Installation and Operation Manual.

12. Inspect flame for stability and uniformity.

13. Check flame signal (at least 10 microamps at high fire)

14. Clean the heat exchanger if flue temperature is more than 54°F (30°C) above return water temperature.

15. Test low water flow conditions.

16. Remove and clean burner using compressed air only.

17. Clean the blower wheel.

18. Check appliance area.

19. Check pressure/temperature gauge.

20. Repair or replace any insulation that must be removed during work.

21. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

22. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

23. Provide written report of work completed and indicate all detected deficiencies.

24. All deficiencies shall be reported with cost estimates for repairs to the KO within two working days.

Buildings 1194, 1604, 1628, 1650, 1655, and 1710 AERCO Boiler Maintenance to include:

2. Inspect vent pipe and clean.

3. Clean and inspect flue collector and condensate tray.

4. Clean and wash heat exchanger.

5. Check and adjust air/fuel ratio.

6. Inspect and clean burner surface.

7. Inspect heat transfer surfaces.

8. Clean strainer mesh.

9. Check inlet gas pressure. Changes in gas pressure require combustion recalibration.

10. Check vent and inlet air terminations.

11. Check electrical supply voltages.

12. Inspect air filters.

13. Inspect and clean condensate drain lines.

14. Check for gas leaks using a soapy solution.

15. Inspect igniter and flame sensor.

16. Check pH of boiler system water.

25. Check flame detection circuitry.

26. Repair or replace any insulation that must be removed during work.

27. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

28. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

29. Provide written report of work completed and indicate all detected deficiencies.

30. All deficiencies shall be reported with cost estimates for repairs to the KO within

Buildings 1655 and 1780 RAYPAK Boiler Maintenance to include:

2. Visually check top of vent for soot. Some sediment at bottom of vent is normal.

3. Visually inspect venting system for proper function, deterioration or leakage.

4. Check for and remove any obstruction to the flow of combustion or ventilation air to boiler.

5. For the 1655 boiler, visually inspect venting system for proper function, deterioration or leakage. Ensure that condensate drain is inspected and ensure that condensate is being directed to appropriate condensate management system or drain, as required by local codes.

6. Follow pre-start-up check in Section N of the product manual.

7. Visually inspect burner flame. Should see light blue flame. Visually inspect hot surface ignitor for damage, cracking or debris build-up.

8. Check operation of safety devices. Refer to manufacturer’s instructions.

9. Follow oil-lubricating instructions on circulator. Over-oiling will damage circulator.

Water-lubricated circulators do not need oiling.

10. Check blower and blower motor. Clean and oil as necessary.

11. Check for piping leaks around circulators, relief valves and other fittings. Repair, if found. DO NOT use petroleum based stop leak.

12. Clean screen and air filter in intake.

13. For low-pressure boilers, test low-water fuel cutoff device. (With at least one stage of the appliance on, depress the low water cut-off test button, appliance should shut-off and ignition fault light should come on. Depress reset button to reset).

14. Check igniter. (Resistance reading should be 30- 70 ohms).

15. Check flame sensors. (Flame signal should be greater than 1 microamp).

16. Check flame failure detection system and components.

17. Check firing rate control.

18. Check flue, vent, stack, or outlet dampers.

19. Test fan air pressure.

20. Test high and low gas pressure interlocks.

21. Recalibrate all indicating and recording gages.

22. Check piping and wiring of all interlocks and shutoff valves.

23. Inspect burner components.

24. Flame failure detection system, pilot turndown test.

25. Test high limit and operating temperature.

26. Conduct a combustion test. (High-Delta: Carbon Dioxide 7-9 %; Carbon monoxide < 200 ppm – XF Carbon dioxide should be 8.5 to 9.0% at full fire;

Carbon monoxide should be <150 ppm).

27. Check all coils and diaphragms; test other operating parts of all safety shutoff and control valves. Coils- check for 60 cycle hum or buzz; diaphragms- using soapy water solution check for leaks on the vent outlets and all fittings on the valves; on other safety devices increase or decrease settings (depending on the type of control) until the safety circuit opens. Reset to original setting after each device is tested.

28. Perform leakage test on pilot and main gas valves, in addition to aural and visual checks.

29. Test purge air switch in accordance with manufacturer’s instructions. (Turn panel switch to the on position until blower is proven, then turn the switch to off. Blower should stay on for approximately 30 seconds).

30. Test burner position interlock in accordance with manufacturer’s instructions.

(Remove front panel and visually check burner orientation, all three screws holding the burner must be in place and flat portion of the flange must be on top in the horizontal position).

31. Check drip leg and gas strainers.

32. Repair or replace any insulation that must be removed during work.

33. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

34. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

35. Provide written report of work completed and indicate all detected deficiencies.

36. All deficiencies shall be reported with cost estimates for repairs to the KO within

Buildings 1235, 1420, and 1700 Boiler Maintenance to include:

2. Visually inspect venting system for proper function, deterioration or leakage.

3. Check for and remove any obstruction to the flow of combustion or ventilation air to boiler.

4. Inspect vent pipe and clean.

5. Clean and inspect flue collector and condensate tray.

6. Clean and wash heat exchanger.

7. Check and adjust air/fuel ratio.

8. Inspect and clean burner surface.

9. Inspect heat transfer surfaces.

10. Clean strainer mesh.

11. Check inlet gas pressure. Changes in gas pressure require combustion recalibration.

12. Check vent and inlet air terminations.

13. Check electrical supply voltages.

14. Inspect air filters.

15. Inspect and clean condensate drain lines.

16. Check for gas leaks using a soapy solution.

17. Inspect igniter and flame sensor.

18. Check pH of boiler system water.

19. Check flame detection circuitry.

20. Repair or replace any insulation that must be removed during work.

21. Make adjustments to give optimal flue gas composition. Record composition, firing position, and temperature.

22. Contractor shall be responsible for maintaining cleanliness of mechanical room during their work performance and shall leave each mechanical room in same condition as found at the onset of the job.

23. Provide written report of work completed and indicate all detected deficiencies.

24. All deficiencies shall be reported with cost estimates for repairs to the KO within

PART I - GENERAL

1.1. REFERENCE PUBLICATIONS:

US GOVERNMENT/US AIR FORCE PUBLICATIONS: US Government/US Air Force publications can be found via internet at http://www.e-publishing.af.mil/. Some suggested publications would include:

1.1.1. 29 CFR (PART 1910), Occupational Safety and Health Standards

1.1.2. 29 CFR (PART 1926), Safety and Health Regulations for Construction

1.1.3. 40 CFR (PART 82), Protection of Stratospheric Ozone

1.1.4. AFMAN 91-203, Air Force Occupational Safety, Fire, and Health Standards, 11 Dec 2018

1.2 NATIONAL INSTITUTE OF BUILDING SCIENCES (NIBS): The NIBS operates a website called the Whole Building Design Guide (WBDG) and it can be found via internet at http://www.wbdg.org/. Some suggested Unified Facilities Criteria’s (UFCs) would include:

1.2.1. UFC 3-240-13FN Industrial Water Treatment Operation and Maintenance, 25 May 2005

1.2.2. UFC 4-010-01 DOD Minimum Antiterrorism Standards for Buildings, 12 Dec 2018

1.2.3. UFC 3-410-01 Heating, Ventilating, and Air Conditioning (HVAC) Systems, Change 4, 1 Nov 2017

1.2.4. UFC 3-550-01 Exterior Electrical Power Distribution, Change 2, 13 Mar 2019

PART II – PRODUCTS

2.1. MATERIALS:

2.1.1. The Contractor’s work shall conform to the contract specifications and the best practices of the trades involved in this type work. All materials used in the work shall be free of defects in workmanship or finish, and shall be installed in accordance with the manufacturer’s specifications.

2.1.2. Contractor Furnished Materials: The Contractor furnished materials shall include all associated equipment and appurtenances required for performing the work in accordance with the equipment manufacturer’s literature, including cylinders to turn recovered R-22 refrigerant to the installation.

PART III – EXECUTION

3.1. WORK REQUIREMENTS:

http://www.e-publishing.af.mil/ http://www.wbdg.org/

3.1.1. Scheduling and Coordination: Prior to work commencement, the Contractor shall ensure that he/she is complying with the approved schedule, that work commences in accordance with the issued Notice to Proceed, and that work is coordinated with the assigned KO. The Contractor shall further determine that all required notices have been given and permits obtained.

3.1.2. All work performed within airfield proximity shall be submitted for approval through Navy Public Works (NPW).

3.1.3 All use of cranes on the installation must be submitted through NPW for authorization and approval.

3.1.4. Scheduling and Sequence of Work: The work shall be performed in such a manner as to minimize interruption of the normal duty day of Government activity.

Certain areas of the facility will be vacated as necessary in order for required work to be performed. Prior to commencement of work, the Contractor shall meet with the KO so that the planned sequence of work and/or schedule may be reviewed and approved.

3.1.5. Interruption of Utilities Services: Interruptions shall be kept to a minimum and may only occur at such times and duration as approved by the KO. All utility interruptions shall be reviewed and accepted by the KO before approval is provided.

Currently, NAS FW JRB Public Works requires a fourteen (14) day prior notification for a Utilities (Water, Gas, and Minor Power) shutdown. Major Power Outages require a twenty-eight (28) day prior notification.

3.1.6. Material(s), equipment, tools, and personnel shall be scheduled on-site in a timely manner as to avoid work delays. Material shall be inspected to ensure they are in compliance with specifications and are free from defects and damage.

3.1.7. Measurements: The Contractor shall field verify all aspects of the project.

The Government shall not be responsible for Contractor oversight.

3.1.8. Existing Work: The Contractor shall take all necessary precautions to protect surrounding areas and Government property from damage. The Government shall not be responsible for any damages caused by the Contractor. The Contractor shall be responsible for repairing or replacing any Government property that is damaged during the performance of work. Failure to do so shall result in the Government withholding contract funds in order to mitigate damage caused.

3.1.9. Facilities: The Contractor shall protect all utilities as well as electrical and mechanical services. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities.

3.1.10. Dust and Debris Control: The Contractor shall limit the spread of dust and debris to the surrounding buildings as well as avoid the creation of a nuisance or hazard in the surrounding area. Non-hazardous debris resulting from the work being performed shall be cleaned up daily.

3.2. PERFORMANCE:

3.2.1. Workmanship: The Contractor is responsible for quality control and shall establish and maintain an effective quality control system. The Government will hold the contractor responsible for the quality of workmanship on the job. Skilled personnel shall execute in a careful, neat, and proficient manner in accordance with accepted trade practices and prevailing industry standards. All work shall be executed in accordance with OSHA standards, and specifically 29 CFR 1910 and 29 CFR 1926.

All work shall comply with all current applicable Federal, State and local regulations/codes/laws, and with all other applicable laws and regulations governing development, design, and construction at the site, whereby the most stringent of the applicable regulations/codes/laws are applicable.

3.2.2. As used herein, “replace” means provide new materials to replace existing or missing materials.

3.2.3. Unforeseen Major Repairs: Should deteriorated materials of a major nature be uncovered in the course of the work, it shall be brought to the attention of the KO.

Repairs shall be made as directed by the KO, in writing, and an adjustment will be made in contract price in accordance with the terms of the modifications.

3.2.4. Existing Work: The Contractor shall be responsible for repairing/replacing/restoring any area or items damaged as a result of the performance of this work. The Contractor will take all necessary precautions to protect surrounding areas and Government property from damage. The Government shall not be responsible for any damages caused by the contractor.

3.3. REQUIRED FINAL SUBMITTALS:

3.3.1. Per UFGS 01 78 00, Section 1.7.1, the Contractor shall “assemble approved information in a binder and turn over to the Government upon acceptance of the work.”

The Government will also accept electronic versions of the warranty binder. Binder or CD label should include Building Number, Contract Number, and Contract Name.

Binder or CD shall contain the following items:

3.3.1.1. Name of the item(s)

3.3.1.2. Model and serial numbers

3.3.1.3. Location where installed

3.3.1.4. Name and phone numbers of manufacturers or suppliers

3.3.1.5. Names, addresses, and telephone numbers of sources of spare parts

3.3.1.6. Warranties and terms of warranty. Include one-year overall warranty of construction, including the starting date of warranty of construction. Items which have extended warranties must be indicated with separate warranty expiration dates.

3.3.1.7. Cross-reference to warranty certificates as applicable

3.3.1.8. Starting point and duration of warranty period

3.3.1.9. Summary of maintenance procedures required to continue the warranty in force.

3.3.1.10. Cross-reference to specific pertinent Operation and Maintenance manuals.

3.3.1.11. Organization, names and phone numbers of persons to call for warranty service.

3.3.1.12. Typical response time and repair time expected for various warranted equipment.

3.3.1.13. All Operation & Maintenance manuals

3.3.1.14. All preventative maintenance plans

PART IV: OTHER REQUIREMENTS

4.1. SCHEDULE:

The Contractor shall provide a Construction Schedule for KO approval. Work will be accomplished during normal Base operating hours, approximately 0730-1630 hours, Monday-Friday. No work will be scheduled on weekends without prior written approval by the KO.

4.2. IDENTIFICATION OF EMPLOYEES:

The Contractor shall be responsible for furnishing to each employee, and for requiring each employee engaged on the Work to display, identification as approved and directed by the KO. Prescribed identification shall immediately be delivered to the KO upon release of any employee. All Contractor and Sub-Contractor personnel shall wear identifying markings on hard hats clearly identifying the Company for whom the employee works.

4.3. JOB SITE TOOLS AND EQUIPMENT:

All hand tools and equipment shall be maintained in good working order and properly stored when not in use. Construction attire shall be in accordance with applicable OSHA regulations.

4.4. SANITATION:

Government toilet facilities shall not be available to Contractor personnel. The Contractor shall provide portable toilets at the job site for Contractor personnel.

4.5. CLEANUP:

The Contractor is responsible for a thorough DAILY clean-up and removal of any debris (waste,…