This semi-annual preventive maintenance checklist for an air-cooled Airstack chiller guides technicians through required tools and PPE, safety steps like lockout/tagout and refrigerant handling, and detailed inspections. Tasks include checking electrical connections and controls, sensors and breakers, crankcase heaters, refrigerant components and sight glass, recording ambient and water temperatures with superheat and subcooling, verifying pressure switches and transducers, inspecting and cycling pumps and valves, cleaning strainers, washing cabinets and condenser coils, checking fan shrouds and blades, and documenting findings.
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