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CITY OF SANTA ANA RFP NO.: 21-033 ON -CALL HVAC MAINTENANCE AND REPAIR SERVICES I. HVAC PREVENTATIVE MAINTENANCE SERVICES The Contractor shall perform preventive maintenance on bi-annual basis in accordance with equipment application, and equipment operating hours that are recommended by each equipment manufacturer and location. This service is designed to optimize the reliability and efficiency of the equipment, extend the useful life of the City's equipment, and provide proactive indications of excessive wear and damage to HVAC systems before a catastrophic failure occurs during the next operating season. The Contractor will also provide recommendations for additional service(s) that will better enhance equipment performance. At a minimum, Contractor shall perform the following preventative maintenance tasks and perform a resistive load bank test. These tasks are designed to maintain the equipment in an optimum operating condition so that the equipment will operate reliably and efficiently. A. AIR CONDITIONING UNITS MAINTENANCE 1. Check all electrical wiring and connection as required; tighten as required. 2. Check and replace filters as required. 3. Check starter contactor surfaces for wear, 4. Check compressor amps and record. 5. Check sight glass for moisture level. 6. Check operation of crankcase heater. 7. Check and lubricate condenser fan motor and fan bearings. 8. Check condition of condenser coil and clean. 9. Check belts for wear and replace per manufacturer's recommendations. 10. Check and adjust compressor capacity controls. 11. Lubricate indoor fan motor and bearings. 12. Check humidifier for proper operation and observe for humidity levels. 13, Inspect for dust, mold, and debris and clean. 14, Check refrigerant charge and for leaks. 15. Check and inspect cabinets for leaks and check cabinet door for secure closure. 16. Replace batteries bi-annually. 17. Test thermostats and controls for proper operation; temperatures and timer functions. B. AIR DUCT MAINTENANCE 1. Inspect unit assembly. 2. Visually inspect air duct system. C. EXHAUST FAN MAINTENANCE 1. Check all electrical wiring and connections. 2. Check all motor starter contactor surfaces for wear. 3. Clean starter and electrical control enclosure. 4. Lubricate bearings. 5. Check belts for wear and replace per manufacturer's recommendations. 6. Check belt tension and sheave alignment and adjust as required. 7. Inspect exhaust fan unit assembly. 8. Check all mounting hardware and tighten as required.