Statement_of_Work_-_Attachment_A.pdf

National Park Service U.S. Department of the Interior

Attachment A – Itemized Tasks

York Chiller

Task Semi-

Annual Annually Check chiller operating performance and conduct control tests X

Review operator logs and provides recommendations X Inspect compressor under load/unload conditions and verify capacity controllers X

Inspect condenser and evaporator for cleanliness and performance X

Perform external leak tests X

Inspect and calibrate control systems X

Verify all control setpoints and adjust as needed X

Check for refrigerant and oil leaks, repair if necessary X Test sensors and safety devices (transducers, thermistors, signal transmitters) X

Verify water flow across condenser X

Inspect gauges and thermometers X

Service starter and control panel, clean and tighten connections X

Inspect electrical components (contactors, relays, switches) X

Check filters for pressure drop X

Inspect pressure relief valves and auto air bleeders X

Record operating voltage/current of compressor-motor assembly X

Run diagnostics on motor starter X

Clean/replace contact points (if applicable) X

Run diagnostics on system control panel X

Tighten terminal connections X

Verify data accuracy and setpoints X

Check water flow and pressure drop across condenser and cooler X

Test flow switch operation X

Conduct leak checks X

Wash Condenser Coils with Hot Water X Collect oil sample and submit for testing X

Riello Boiler (2)

Task Semi- Annual Annually Monitor pressure and temperature gauges X Inspect burner flame and flame failure response X Perform bottom blowdown to remove sludge X Observe operating and high-limit controls X Test limit and flame detection controls X Tune burner settings (performed by qualified technician) X Inspect and clean burner cone and combustion chamber X Check fuel pressure settings and regulator operation X Disassemble and inspect LWCO and auxiliary LWCO X Hydrostatic test for leaks in tubes and piping X Clean boiler interior (fire side and water side) X Inspect refractory for damage X Replace or re-certify safety valves X Bubble test fuel train safety shut-off valves X Provide and install annual maintenance kit per unit X Provide and Install condensate neutralizer per unit X Conduct Combustion analyzation of each unit, check for proper operation and adjust to manufacturers specifications. X

Taco Pumps (4)

Semi-

Annual Annually Inspect for water leaks, unusual vibration, or motor noise X Check and replenish grease in motor bearings X Inspect & tighten electrical terminals. X Ensure motor winding and terminal box remain dry and secure X Verify motor orientation and mounting alignment X Check flow rates and ensure operating within nameplate pressure limits X

Carrier Air Handler

Task Quarterly Semi-

Annual Annually General Inspection

Inspect air handler cabinet for signs of damage or corrosion

X

Check for unusual noises or vibrations X Verify secure mounting and connections X Inspect insulation for wear or moisture X

Blower Assembly Inspect blower wheel for dust and debris X Clean blower wheel and housing X Check motor operation and amperage draw X Lubricate motor bearings (if applicable) X Inspect and adjust belt tension (for belt-driven units) X Replace worn belts (recommended every 90 days for commercial units) X

Air Filters

Inspect filters for dirt and damage X Replace disposable filters X Verify proper filter fit and sealing X

Coils Inspect evaporator and heating coils for dirt and corrosion

Clean coil surfaces with approved cleaner X Check for refrigerant leaks or damage X Ensure proper airflow across coils X

Electrical Components Inspect wiring for wear, corrosion, or loose connections

Check control board and relays X Test safety switches and sensors X Verify thermostat operation and calibration X Condensate Drain System X Inspect drain pan for cracks or standing water X Clean drain lines to prevent clogs X Test float switch operation (if installed) X

System Performance Measure supply and return air temperatures X

Check static pressure across the system X Verify airflow matches design specifications X Confirm system cycles properly X Documentation X Record all findings and corrective actions X Note date of service and technician name X Update maintenance log and schedule next inspection X

Condair Humidifiers (2)

Task Semi- Annual Annually System Review

Overall system function test X Inspect nozzle spray patterns X

Pump Unit Filter(s) replacement (Annually) X Check condition of pump X Solenoid valve(s) test X Change gasket kit in high pressure relief X Functional test of the high pressure gauge X Functional test of pressure switch X Test ON/OFF Valve X Inspect electrical connections in control cabinet X

Humidity Sensor(s) Humidity sensor test/adjustment (replace if ±10% deviation) X Max humidity controller check (max hygrostat) X

Controls Unit Transfer relay replacement X Contactor test X Contactor/thermal relay replacement X

Hygiene Bactiquant® test X System disinfection/cleaning X

Titus VAVs (12)

Semi-

Annual Annually Visual inspection of VAV boxes and ductwork for damage or leaks X Check for signs of condensation or water damage X Verify access panels are secure X Test damper operation (open/close response) X Measure and verify airflow against design specs X Inspect control system response to thermostat changes X Check electrical connections and motor operation X Calibrate thermostats and sensors X Inspect actuator and damper linkage for wear or looseness X Verify minimum and maximum damper positions X Check insulation and box integrity X Test pressure sensors and airflow stations X Full system performance review X Recalibrate airflow sensors and controllers X Inspect and clean all internal components X Review and update BAS setpoints and zone configurations X Document all findings and schedule follow-up actions X

General Systems

Pipes, fittings, valves, ducts, dampeners, etc.

Semi-

Annual Annually General inspection of all system components (e.g. valves, insulation, etc.) X

Modine hanging heaters Inspect motor for proper fan operation X Make sure coils are clean X Make sure water control valves are working properly X Check thermostat operation X Check power switch operation X