A04_SOW.pdf

National Park Service

Interior Region I North Atlantic- Appalachian

Philadelphia, Pennsylvania

STATEMENT OF WORK:

Preventive Maintenance of Region I Office Data Center

Chiller Units and Evaporator/Condenser Units

23 October 2023

NATIONAL PARK SERVICE

Interior Region I North Atlantic-Appalachian

NORTH/PHILADELPHIA MAJOR ACQUISITION BUYING OFFICE

STATEMENT OF WORK (SOW)

1. BACKGROUND

The Regional Office Data Center Liebert PDX direct expansion Air Cooled systems are highly efficient thermal management units that provide cooled air for our critical data center. These units are vital to meeting our Regional Office IT needs. In the event of the failure of one of our Liebert units our IT systems would be considerably compromised and continued operation under these circumstances would hamper the abilities of our Regional Staff to support the National Parks throughout the Northeast region.

The National Park Service, Interior Region I North Atlantic-Appalachian Office is requesting a five-year service Contract for three (3) quarterly inspections/Preventative Maintenance calls and one (1) annual certification/preventive maintenance of two (2) Liebert PDX Air Cooled System Chillers and five (5) Liebert SRC (Evaporator/Condenser) Units in the Regional Office Data Center.

Emergency repairs will be provided on an as needed basis.

2. Objectives:

The objective for the contractor is to provide scheduled quarterly maintenance and annual certification of our Liebert PDX and Liebert SRC Units. Contractor will perform three (3) quarterly inspections/preventative maintenance calls and one (1) annual certification/preventive maintenance call. The contractor will also accomplish component life-cycle replacements and emergency repairs on an as needed basis to maintain normal operation of the chillers and evaporators/condensers.

3. Location of Work:

National Park Service 1234 Market Street 20th Floor Philadelphia, PA 19106

3.1 Liebert PDX Air-Cooled System

Model PX023CA1A8A781 Quantity Two (2)

3.2 Liebert SRC Air-Cooled System

Model SRC24HPN00 / SRC24HPC000 (Evaporator / Condenser) Quantity Five (5)

4. General:

The contractor shall provide maintenance, service, and repairs by a trained and licensed mechanic with a current Pennsylvania license. The trained mechanic or mechanics shall hold a current license as needed to meet the Pennsylvania code requirements to perform work such as but not limited to, Refrigeration’s Technicians License, Pennsylvania Electrical License, and Gas Fitters license.

5. Scope:

The scope of work is to provide maintenance services in addition to component life-cycle replacements and unscheduled repairs on an as needed basis to maintain normal operation of the chillers and evaporators/condensers.

As per manufacturers requirement, the units require preventative Maintenance at a minimum, if industry standard dictates a higher level of service, that will be required.

The Contractor shall provide three (3) quarterly inspections/preventative maintenance and one

(1) annual certification/preventive maintenance to include but not limited to:

5.1 Units and Tasks

5.1.1 Liebert PDX Units

a. Evaporators/Filters:

1. Check/Replace Filters.

2. Wipe Section clean.

3. Clean Coil.

4. Clean Condensate Pan and Trap.

5. Drain and clear connection lines, ensure leak free and in good condition.

6. Grille area unrestricted.

7. Check/Test Filter clog switch Operation.

b. Blower Section (EC Fan):

1. Mount bolts tight/secure.

2. Fan Guard bolts tight/secure.

3. Impeller spins freely.

4. Check belt tension and condition.

5. Check sheave/pulley (identify replacement if required).

6. Check motor amp draw (Compare to nameplate Amps).

c. Reheat Section:

1. Inspect Elements.

2. Check wire connections (inside reheat box).

3. Reheat Amp Draw

d. Humidifier:

1. Check drain valve/drain lines/trap for clogs.

2. Check water fill valve and all hoses for leaks.

3. Check canister for mineral deposits.

4. Check condition of electrodes.

5. Clean Strainer.

6. Replace humidifier canister if necessary.

7. Check operation of humidifier.

8. Check Humidifier Amp Draw.

e. Condensate Pump:

1. Check for debris in sump.

2. Check free movement/operation of floats.

3. Check/clean discharge check valve.

4. Check drain connections and drain lines for leaks.

f. Electrical Panel:

1. Check fuses

2. Check contactors for pitting (Replace if pitted).

3. Check/Re-torque wire connections.

g. Controls:

1. Check/verify control operation.

2. Check/Test changeover device.

3. Check/Test water-detection device(s)

h. Refrigeration Piping:

1. Check refrigerant lines (check clamps, rubbing, and leakage).

2. Check for moisture.

3. Check for restriction temperature drop across filter drier.

i. Compressor Section:

1. Check Oil Level.

2. Check for oil leaks.

3. Check compressor mounts (including springs/bushings).

4. Cap tubes (ensure not rubbing).

5. Check/Re-torque wire connections (inside compressor box).

6. Check for excessive noise/vibration during compressor operation.

7. Check crank case heater fuses and operation.

8. Check for refrigerant leaks.

9. Suction Pressure.

10. Discharge Pressure.

11. Superheat.

12. High pressure cutout.

13. Compressor Amp Draw.

j. Water Cooled Condenser:

1. Verify proper water maintenance/treatment is being performed.

2. Check water regulating valve/motorized ball valve operation.

3. Verify water flow.

4. Clean screen on Y strainer.

5. Ensure Cap tubes are not rubbing.

6. Check condenser and supply/return lines/connections for water/glycol leaks.

7. Entering water temperature.

8. Exiting Water temperature.

k. Chilled water:

1. Verify proper water maintenance/treatment is being performed.

2. Check condenser and supply/return lines/connections for water/glycol leaks.

3. Stroke free-cooling valve open and closed. Ensure proper operation.

l. Liebert MC Condenser:

1. Coil clean of debris.

2. Fans free of debris.

3. Fans securely mounted.

4. Motor bearings in serviceable condition.

5. Check all refrigerant lines for vibration isolation. Re-support as required.

6. Check for refrigerant leaks.

7. Check surge protection device status indicator lights.

8. Check/Re-torque wire connections.

9. Check contactors for pitting.

10. Certify operation sequence/set points.

11. Charge verification:

a. Outdoor air temperature.

b. Sub cooling.

c. Indoor-unit Return-Air Temperature.

d. Refrigerant sight glass level.

12. Motor Amp Draw

m. Drycooler:

1. Coil clean free of debris.

2. Motor Mounts tight.

3. Motor bearings in good condition.

4. Piping support/clamps secure

5. Check/Re-torque wire connections.

6. Check contactors for pitting.

7. Check fuses.

8. Verify fan operation.

9. Check surge-protection device status lights

10. Stat Settings Refrigerant level.

11. Glycol level.

12. Glycol solution mix.

13. Water/Glycol solution flowing continuously/free of debris.

14. Water treatment plan established and followed for open cooling-tower applications.

15. Check all lines for signs of leaks (repair as required).

16. Motor Amp Draw:

n. Glycol Pump:

1. Check pump rotation.

2. Check pump and supply/return lines/connections for leaks.

3. Pump pressures.

4. Verify pump changeover.

5.1.2 Liebert SCR Units

a. Evaporators/Filters:

1. Check/Replace Filters.

2. Wipe Section clean.

3. Clean Coil.

4. Clean Condensate Pan and Trap.

5. Drain and clear connection lines, ensure leak free and in good condition.

6. Check/Test Filter clog switch Operation.

7. Check/Test Condensate Drain Pan Float Switch Operation.

b. Blower Section:

1. Blower wheels free of debris.

2. Check Motor mounts for security.

3. Check Motor Amp Draw. Compare to Nameplate Amps.

c. Reheat:

1. Inspect elements, check for corrosion.

2. Check/Retorque wire connections (Inside Reheat Box).

3. Check Reheat Amp Draw.

d. Humidifier:

1. Check drain valve/drain lines/trap for clogs.

2. Check water fill valve and all hoses for leaks.

3. Check canister for mineral deposits.

4. Check condition of electrodes.

5. Clean Strainer.

6. Replace humidifier canister if necessary.

7. Check operation of humidifier.

8. Check Humidifier Amp Draw.

e. Condensate Pump:

1. Check for debris in sump.

2. Check free movement/operation of floats.

3. Check/clean discharge check valve.

4. Check drain connections and drain lines for leaks.

f. Overflow Drain Pan:

1. Drain connection lines open/free of debris.

2. Water detection device check for operation.

g. Electrical Panel:

1. Check fuses.

2. Check contactors for pitting (Replace if pitted).

3. Check/Re-torque wire connections.

h. Controls:

1. Check/verify control operation.

2. Check/Test changeover device.

3. Check/Test water-detection device(s)

i. Refrigeration Piping:

1. Check refrigerant lines (check clamps, rubbing, and leakage).

2. Check for moisture.

3. Check for restriction temperature drop across filter drier.

j. Compressor Section:

1. Check oil level.

2. Check for oil leaks.

3. Check compressor mounts (including springs/bushings).

4. Cap tubes (ensure not rubbing).

5. Check/Re-torque wire connections (inside compressor box).

6. Check for excessive noise/vibration during compressor operation.

7. Check crank case heater fuses and operation.

8. Check for refrigerant leaks.

9. Suction Pressure.

10. Discharge Pressure.

11. Superheat.

12. High pressure cutout.

13. Compressor Amp Draw.

k. Air-Cooled Condensing Unit:

1. Ensure coil is clean and free of debris.

2. Ensure motor mounts are tight.

3. Ensure bearings in good condition.

4. Refrigerant lines are properly supported.

5. Check Motor Amp Draw.

Note: Verify any/all equipment alarms.

6. Quality Assurance:

The COR may join the technician at any time to conduct quality control checks. Contractor will complete an accurate data record and will be evaluated periodically during the contract and at the contract’s annual completion date. Contractor shall provide a Quality Assurance Plan to the COR.

8. Reports:

Written annual certification shall be documented that all systems are performing to manufacturer’s specifications. Contractor will provide this documentation to the Contracting Officers Technical Representative (COR) no later than 7 days after the inspection or the correction of any deficiency.

9. Unscheduled Service Calls:

The COR will notify the contractor, via telephone and/or email of all unscheduled service calls. COR shall provide:

Description and location of the issue that requires service Date and Time service requirement was identified/received Location of the equipment, items, or systems to be repaired

The Contractor shall respond to any unscheduled service calls within 2 hours of receipt of notification. A technician shall be onsite at 1234 Market St within 24 hours of notification.

Prior to repairs being performed, the Contractor shall notify the COR of the diagnosis, required repairs as well as provide a quote for the repair. The quote shall be provided to the COR prior to the start of any repairs being authorized. After the quote is approved by the COR, the contractor shall begin repairs. After repairs are completed, invoices will be documented and received within 7 days of completion.

1.1 Hour definitions

Regular working Hours Regular Hours - (Monday through Friday, 7 am to 5 pm excluding Holidays)

After Hours - (Monday through Friday, 5 pm to 7 am, Saturday, Sunday and Holidays).

10. FEDERAL HOLIDAYS/GOVERNMENT SHUT DOWN

a. FEDERAL Holidays are as follows:

New Year’s Day, Martin Luther King Jr.’s Birthday, President’s Day, Memorial Day, June 19th, Independence Day, Labor Day, Columbus Day, Veteran’s Day, Thanksgiving Day, and Christmas Day; the preceding Friday when one of the above holidays falls on a Saturday; the following Monday when one of the above holidays falls on a Sunday.

Appendix A: Chiller tech manual with picture ID of the units

Appendix B: 5 Ton condensing units with picture ID of the units