This semi-annual preventive maintenance checklist guides technicians through servicing Multistack ground source heat pumps. Tasks include safety preparation with lockout and tagout, adherence to refrigerant recovery rules, and reviewing daily chiller logs. Inspect for faults, vibration, and mechanical damage; check compressor oil level, water treatment readings, pressure and temperature drops across heat exchangers; clean condenser filter strainers; perform visual leak checks; and tidy the work area. Record findings and time spent in the maintenance log to support equipment reliability and compliance.
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