Preventative Maintenance (Chillers, Cooling Towers & Roof Top Units). The Contractor shall perform annual and semiannual preventative maintenance measures to assure proper operation and extend the lifecycle of the equipment. This shall include but not be limited to: • Semi-Annual (chillers) – Clean condenser tubes; change oil filters; change driers and VSD fluid; provide a hydrogen peroxide flush on drive coolant loops; clean VSD heat exchangers; inspect all electrical components and connections. • Semi-Annual (cooling towers) – clean cooling tower and clean condenser pump strainers. • Semi-Annual (rooftop units) – Contractor shall perform the following on an annual basis prior to the cooling or heating season: Check all belts Check fan motors and grease bearings where applicable, adjust pulleys Machine clean all evaporator and condenser coils Check compressors for refrigerant and/or oil Check and tighten all electrical connections and fuses Check all actuators and dampers for operation, grease where applicable Check all filters Check operation of all VSD drives for proper operation...
