York Brand Name Chiller and Baltimore Coil Brand Name Cooling Tower Maintenance

Cooling Towers The contractor shall perform the following preventative service as necessary and applicable to maintain the Cooling Towers operating with optimum efficiency and in accordance with the original design intent and equipment manufacturers recommended specifications. 1. Operating inspection (Monthly): The contractor shall perform monthly inspection of the following items to ensure the units operate reliably and efficiently: Check for general condition and operation Clean debris from unit Check and adjusting sump water level Inspect heat transfer section and reporting on condition Inspect spray nozzles or water distribution pans Check and adjust fan belt position Check unit for unusual noise or vibration Lubricate fan shaft bearing 2. Preventative maintenance and inspection (Annual): The contractor shall perform one (1) annual preventative maintenance and inspection of the following items to ensure the units operate reliably and efficiently: Check for general condition and operation Check drift eliminators, louvers, fill, Spray nozzles and Baffles Thoroughly clean and de-scale the tower housing and components Clean debris from unit Clean and flushing sump Clean sump strainer Check fan bearing locking collars Check motor voltage and current Lubricate motor base adjusting screw Lubricate fan shaft bearings Change belts once a year Verify heater and heat tracing operation if tower remains online throughout the year Check and lubricate motor bearing Caulk and seal of cooling tower seams as needed Properly evaluate the equipment condition and make recommendations to enhance its operating efficiency and reliability Provide a service report illustrating condition and useful life expectancy Chillers The contractor shall perform the following preventative service as necessary and applicable, in the best judgment of the servicer, to keep the Chillers operating properly and with optimum efficiency. 1. Operating inspection (Monthly): The contractor shall perform monthly inspection of the following items to ensure the units operate reliably and efficiently: Check for proper refrigerant charge and oil level(s) to ensure optimum performance. Check conditions and settings of panel controls, operating controls, safety controls, thermometers, and gauges to ensure optimum performance and reliability. Determine level of heat exchange tube fouling from analysis of available log reading or readings taken during inspection. Lubricate all moving parts, as required. Verify proper equipment operation through analysis of available log readings or readings taken during inspection. Check compressor oil, replace oil filters, refrigerant filters and filter driers, as required. Check for refrigerant leaks, repair leaks, and replace by topping off refrigerant lost to ensure optimum performance. 2. Preventative maintenance and inspection (Annual): The contractor shall perform one (1) annual preventative maintenance and inspection of the following items to ensure the units operate reliably and efficiently: Drop one condenser head, conduct annual visual inspection of condenser tubes; Repeat for each chiller. Mechanically brush clean condenser tubes for each chiller once per year. Provide annual chemical analysis and report on compressor oil. Conduct annual meg-ohm stator test on all compressor motors and check motor lugs for tightness. Inspect the starter, check all lugs for tightness and test all safety and operating controls. Parts and Labor The contractor shall furnish all necessary repairs and renewal parts and lubricants required to maintain the equipment in proper operating condition inclusive of all necessary labor to install repair parts, make necessary adjustments to keep the equipment operating efficiently. Inspections During the term of the base contract year and option years, the contractor shall perform monthly inspections of all equipment. Additionally, the contractor shall perform any annual start-up or shut- down as required by building operation schedule. Annual maintenance shall be performed during the winter months with specific dates coordinated with the COR or government representative. The contractor shall provide a detailed report of each inspection to the owner.

Division 01 -	General Requirements, Quality Control.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Cooling Towers.