Specifications include, but are not limited to: A. Annual services to be performed during November through March: 1. Control panel test and calibration of the following controls as applicable: a. Low temperature control. b. High pressure control. c. Motor temperature control. d. Oil pressure relief valve setting. e. Check and calibrate load limiting relay. f. Check setting of P.E.’s and calibrate as necessary. g. Check and calibrate temperature controls for leaving chilled water controller h. Set pilot positioner. i. Check gauges for calibration. 2. Oil sump The County may choose to extend the period between oil sump cleanings for specific machines, based on oil sample analysis and other relevant information. The County will only grant such extensions when such extensions are in the County’s own best interest. a. Meg oil pump motor. b. Remove oil sump cover and oil pump and motor assembly. c. Flush oil sump with solvent and thoroughly clean using lint free rags. d. Inspect oil pump assembly for excessive wear. e. Check operation of oil pressure regulator, repair or replace as necessary f. Replace oil strainer cartridges. g. Reassemble oil sump assembly and charge with proper quantity and approved type of oil. h. Provide spectrographic analysis of oil sample. 3. Centrifugal Motor and VFD/Starter a. Clean starter, remove covers for inspection of arc shoots and check spring tension. b. Check all electrical connections for tightness and proper makeup. c. Meg compressor motor. d. Check operation of unit starter/VFD. e. Visually inspect resistors, IGBTs and/or autotransformers; replace as necessary. f. Overloads must be load tested in their own environment. The method of testing overloads shall be by a non-overloading procedure of the motor but using artificial devices on the overloads for a proper test and calibration. g. Vibration test. 4. Leak testing Leak testing shall be performed in accordance with the latest Federal regulations. 5. Oil analysis All oil analyses shall be performed by an individual certified by the service Contractor to be fully qualified to perform such tests. Service Contractor shall also certify that the tests are conducted in accordance with the American Standard Testing Materials Method specifically intended for air condition systems. Test results are to include but not necessarily by limited to the following: a. Machine type and ID number. b. Machine serial number. c. Sample oil number. d. Date of analysis. e. Moisture content in parts per million. f. Total acid content. g. Aluminum in parts per million. h. Chromium in parts per million. i. Copper in parts per million. j. Iron in parts per million. k. Lead in parts per million. l. Tin in parts per million. m. Zinc in parts per million. n. Comments about interpretation of chemical analysis. If an oil analysis report indicates a machine problem, then the service Contractor shall take appropriate action; if an area of concern is identified in the report, the service Contractor shall, at a minimum, perform a follow up oil analysis within a period of two months, maximum, in order to ascertain the extent of any possible problem.
