ESBD_365478_1719601165441_HHS0014790_Exhibit G Scope of Work.pdf

Exhibit G – Scope of Work

Electrical Preventative Maintenance:

1. Siemens TYZ and P1 Panelboards (Qty 198)

a. ARC Flash Suite required – Set up safety perimeter, remove panelboard cover and dead front, conduct thermal imaging scan, lightly vacuum panel without causing safety risk, close up panel per spec, and report deficiencies.

2. Eaton BIC9C3X41200 Automatic Transfer Switches (ATS Units) (QTY 9)

a. ARC Flash Suite required – Set up safety perimeter, open cover, thermal image terminations, lightly vacuum panel without causing safety risk, and close up per manufacturer’s specifications.

3. Siemens Rear Connected WL LV Switchgear (Qty 4)

a. Provide PPE per NFPA 70E, external scan of equipment, and provide report on deficiencies.

4. General Conditions

a. Exclusions – Medium voltage gear due to safety, transformers (all types) due to safety, electrical disconnects/equipment terminations.

Plumbing Preventative Maintenance

Equipment Specs:

1. VC Booster-Domestic Booster Package-VFD Triplex System

2. Premier Flow-Packaged Condensate Pump System- Duplex System to Cooling

Tower.

The bladder tank should be checked periodically (at least once per year) to ensure the pre-charge pressure is properly maintained. Changes in pre-charge pressure can significantly alter the tank’s performance and reduce the life expectancy of the bladder. If it appears that a bladder tank is not operating correctly, check the tank’s air pre-charge:

1. Disconnect electrical power to the pump.

2. Drain the tank by opening the closest faucet.

3. Check the tank’s pressure by placing an air pressure gauge on the air charging valve on the top of the tank.

4. Add air if the pressure is more than 2-3 psi below the pump cut-in pressure.

Use caution when using an air compressor or air pump and follow compressor manufacturer’s safety warnings. As air is added, note the discharge from the open faucet:

a. If water, continue adding pressure as needed to fully evacuate the water from the tank. Re-check the bladder charge pressure and adjust to 2-3 psi below pump cut-in pressure.

b. If air, there is a tear or hole in the bladder. The bladder will need to be replaced.

5. Release air if the pressure is equal to or above the pump cut-in pressure (lowest pressure in the operating range). There should always be a small amount of water in the bladder when the pump turns on to avoid a pressure “flat spot”. A “flat spot” is defined as a dramatic pressure drop that occurs while waiting for the pump to deliver water to the system piping.

6. Check for leaks in the air charging system by dripping a soap solution on the air charging valve.

7. Re-start the pump and run through a normal cycle to verify the setting. If tank pressure drops abnormally, the bladder inside the tank may have a tear or hole in it.

Monthly

1. Check and record incoming voltage for level and balance.

2. Inspect all pipe connections for leaks.

3. Exercise all isolation valves.

4. Inspect thermal relief valves that they are stuck open.

5. Record number of pumps are running during inspection. Record time of inspection.

6. Record suction pressure.

7. Make sure all HOA’s and variable speed drives are set to AUTO.

Semi-Annually

1. Check motor bearing and lubricate if necessary. Do not over grease as this can cause premature bearing or winding failure.

2. If hydro-pneumatic tank is present, inspect for leaks, check pre-charge level of bladder.

3. If the pumps have a recirculation line, flush the tubing to make sure no debris is present.

4. Inspect mechanical space for leaks and humidity. Room should be clean, dry, and well ventilated.

5. If any rust is present on the skid, wire brush off and apply primer and paint.

Annually

1. Inspect and tighten all electrical and hydraulic connections, including bolts.

2. Compare gauge reading to pressure reading on the RMI. Replace gauge if greater than 5 PSI difference.

3. Disassemble 81-12 and inspect rubber seating, replace if it looks damaged or worn.

4. Inspect all variable speed drive keypads for visibility and functionality by cycling RAND, OFF, and back to AUTO. Close each discharge valve prior so the plumbing system doesn’t see a surge in pressure. Do not leave pumps in hand.

5. Record parameters: set points, settings, and alarm settings.

a. Back up parameter.

Equipment Specs:

Nine (9) total pumps – Bell & Gossett E-80SC

MONTHLY PREVENTATIVE MAINTENANCE

1. Grease bearings.

Equipment Specs:

Four (4) Patterson-Kelley SC-4000 Boilers

MONTHLY PREVENTATIVE MAINTENANCE

1. Press the “Info” button on the NURO® touchscreen to load the Information Screen and scroll down to view the flame signal measured in Volts. Typical flame signals should read between 20-50V. If the flame signal is below 10V, the UV scanner may need to be replaced.

2. Test the low water level cut-off.

3. Test the manual reset high-temp limit.

4. Test the low gas pressure switch.

5. Test operating temperature controls by reducing or increasing temperature settings as necessary to check burner operation.

6. Check the combustion chamber drain piping for leaks or obstructions.

SEMI-ANNUAL PREVENTATIVE MAINTENANCE

1. Clean burner of any accumulated dust or lint.

2. Inspect burner for any signs of deterioration or corrosion. Replace immediately if deterioration or corrosion is evident.

3. Check the pH level of the system fluid. Verify the pH is in accordance with

Water Quality Standards for Hydronic Boilers in Multi-Metal Systems.

4. Inspect and clean the condensate system and check for leaks. If a condensate neutralization kit is present, open the lid and inspect the limestone rocks. If they are absent or have been significantly worn away, replace them with new limestone rocks. Use high-calcium (or pure) limestone.

ANNUALLY

1. Inspect and clean the inlet screen of any accumulated dust or lint.

2. Check burner and clean off any soot or foreign material that may have accumulated.

3. Check for corrosion of the burner and its parts. If there is evidence of deterioration or corrosion, replace immediately.

4. Inspect combustion chamber when the burner is removed for inspection.

Note any signs of deterioration. Clean as necessary.

5. Inspect and clean heat exchanger. Remove the various covers to inspect the flue gas passageways.

6. Clean the combustion side casting pins by flushing with clean water and blowing dry with compressed air. Do not use any cleaning agents or solvents.

Do not use soap. A soft nylon brush may be used in accessible areas.

7. Inspect condensate collection pan that is the lowest part of the heat exchanger.

8. Replace the ignition electrode and gasket.

9. Drain and flush the water side of the heat exchanger as required (separate from system flush) using clean water only.

10.Take a sample of the system fluid and verify the water quality is in compliance as defined in Appendix C – Water Quality Standards Quality Standards for Hydronic Boilers in Multi-Metal Systems.

11.Remove the nuts and bolts connecting the blower transition piece to the burner transition piece. The blower transition piece will remain supported in place.

12.Remove the nuts holding the burner transition piece to the studs on the front of the boiler. Pull out the burner transition piece with the two gaskets and set aside. Discard gaskets. Carefully remove the triangular burner from the boiler and clean with pressurized water (approximately 40 PSIG).

13.Inspect and adjust (if necessary) the temporary drain hose to help drain the wash water from the boiler.

14.Reconnect the condensate tubing to the condensate neutralization tank.

15.Reinstall a new gasket over the boiler’s threaded studs, and CAREFULLY insert the burner into the burner hole. Support the burner so it remains horizontal while inserting. Once the burner is installed, reinstall a new gasket over the burner’s flange.

16.Reinstall the burner transition piece (and lower gasket) and bolt to the burner flange. Once secured to the burner flange, bolt the burner transition piece to the blower transition piece. Ensure the gasket between the burner transition piece and blower transition piece is in place.

17.Reinstall the ignition electrode assembly (if previously removed).

18.Reinstall the flame/ionization rod assembly (if previously removed).

19.Re-check the tightness of all bolted joints.

Equipment Specs

One (1) – Leonard TM154512BLF

SEMI-ANNUALLY

1. Shut off hot and cold water to the valve as well as the valve outlet port.

https://www.manualslib.com/manual/1995671/Patterson-Kelley-P-K-Mach-Cm300.html?page=104 https://www.manualslib.com/manual/1995671/Patterson-Kelley-P-K-Mach-Cm300.html?page=104

2. Remove, inspect and clean shuttle assembly.

a. Check the condition of the shuttle O-ring and replace if necessary.

3. Lubricate the shuttle O-ring before reinstalling the shuttle assembly.

4. Valve temperature must be reset after any repairs or cleaning.

HVAC Preventative Maintenance

Quarterly Centrifugal Chiller Preventative Maintenance Checklist

1. Safeties and Controls

a. Clean control panel.

b. Inspect wiring & terminals for signs of overheating.

c. Check guide vane linkages for tightness & wear.

d. Test DP flow switch cutouts (chilled & condenser water).

e. Test operation of anti-recycle timers.

f. Check sequence of operation on all control relays.

g. Inspect all solenoid coils & magnets.

h. Check accuracy of all control gauges; recalibrate as needed.

i. Verify accuracy of all thermometers.

j. Test high condenser pressure safeties.

k. Test low evaporator temperature safeties.

l. Test low oil pressure safeties.

m. Test high motor temperature safeties.

n. Check the operation of all pump auxiliary contacts.

o. Test operation of oil temperature & pressure controls.

2. Motor and Starter

a. Clean starter cabinet.

b. Check & record voltages on each leg.

c. Check & recondition contact tips as needed.

d. Check contact spring pressure.

e. Inspect leads.

f. Inspect arc chutes & bearings.

g. Check coils for mechanical defects & signs of overheating.

h. Check magnet faces for misalignment & bonding.

i. Check oil level of dashpots; add oil if needed.

j. Inspect overload relay heaters.

k. Tighten all connections.

Annual Centrifugal Chiller Preventative Maintenance

1. Annual maintenance to include above quarterly services in addition to the following:

a. Compressors and Vessels

i. Remove condenser heads.

ii. Brush condenser tubes with nylon brushes.

iii. Replace heads and provide new gaskets if needed.

iv. Evacuate refrigerant and weigh.

v. Pressurize units and leak at 10 PSIG.

vi. Change filter driers.

vii. Perform Eddy current test on all condensers.

b. Lubrication System

i. Megger oil pump motor and record readings.

ii. Take and record oil pump amperage and voltage readings.

iii. Check oil cooling system operation.

iv. Tighten terminal connections on oil pump motor.

v. Take sample of old oil and send out for analysis.

vi. Change oil and dispose of old oil.

Liebert System Preventative Maintenance Checklist

1. Replace air filters per each visit.

2. Check data log.

3. Tighten all wire connections per each visit.

4. Oil bearings as needed.

5. Check belts and adjust tension as needed.

6. Semi-annually check all safety protection.

7. Check General Proper functioning of the indoor unit per each visit.

8. Check General Proper functioning of the outdoor unit per each visit.

9. Check thermostat operation (manual mode; twice per year).

10.Check unit input voltage (actual voltage versus name plate voltage; each visit).

11.Check compressor input current (actual amp versus nameplate amp; each visit).

12.Check condenser fan motor input current (actual amp versus nameplate amp; each visit).

13.Check input current of the indoor unit fans (actual amp versus nameplate amp; each visit).

14.Check drain line (twice a year or as needed).

15.Check refrigerant (as needed).

16.Check differential temperature (each visit).

17.Flush condenser coil with water (once a year or as needed).

18.Light cooling coil cleaning (one a year or as needed).

Exhaust Fan Preventative Maintenance Checklist (Quarterly)

1. Check and adjust belts.

2. Check pulleys.

3. Grease bearing.

4. Check for cleanliness.

5. Check electrical connections.

Fan Coil Unit Preventative Maintenance Checklist (Quarterly)

1. Check thermostat functionality.

2. Check and clean air filter.

3. Check and clean Y strainer filter and observe its operation.

4. Check fan bearings and lubricate if necessary.

5. Check pipes for leaks and damage.

6. Clean housing and support and re-paint if necessary.

7. Measure and record supply air temperature.

Cooling Tower Preventative Maintenance Checklist (Quarterly)

1. Check and adjust suction screens, belts, and pulleys.

2. Test water quality.

3. Check basin water level.

4. Check incoming and outgoing water temps.

5. Check for excessive vibration or unusual noises.

Cooling Tower Preventative Maintenance Checklist (Annually)

1. Perform all of the above quarterly services plus the following:

a. Drain cells and power wash the upper and lower basin, and tower, and clean the fill.

b. Check electrical connections and sump heaters.

Unit Heater Preventative Maintenance Checklist (Quarterly)

1. Check wiring and electrical connections.

2. Lubricate all moving parts such as bearings and motors.

3. Check thermostats and controls to ensure they are set at the correct temperature.

4. Check all safeties.

VAV Preventative Maintenance Checklist (Quarterly)

1. Check the space temperature and setpoint through the thermostat.

2. Check the modulating action of the VAV damper.

3. Check the modulating action of the hot water valve. (where applicable)

4. Check the front end and verify proper communications.

Air Handler Preventative Maintenance Checklist (Quarterly)

1. Check air filters for dirt. (Air filters should be replaced at least once a month)

2. Check belt, and if loose or stretched, replace immediately.

3. Check unit to make sure there are no strange vibrations.

4. Check and repair loose or damaged electrical connections to ensure proper power transfer.

5. Check all bolts, fittings, and nuts if they are properly tightened.

6. Check actuators open and allow cool air to blow down the ducts.

7. Apply lubrication to ensure all parts are working smoothly.

8. Check condensation drain for possible clogs.

9. Check for refrigerant leak in coils, pipe, and valves for direct expansion systems.

10.Check air dampers to ensure they close, open, and modulate properly.

11.Check freeze stats to ensure they are set and functioning properly.

12.Check and clean blades on blower.

Air Handler Preventative Maintenance Checklist (Annually)

1. Perform all of the above quarterly services along with the following.

a. Megger motors.

b. Clear drain lines.