Specifications include, but are not limited to:Chiller Maintenance Program:The various services described below shall be provided as part of contractor’sPreventiveMainten a n c e P r o g r a m f o r c h i l l e r s . 1. Annual winter maintenance – Once a year, a thorough preventive maintenance schedule shall be performed including the following: a. Pressure test as required. Nitrogen is furnished by Contractor. b. Repair any minor leaks, provided repairs can be made within time allocated. c. Detailed inspection of purge system and thorough cleaning of purge compressor, purge oil separator, purge drum, and purge condensing coil. Change oil as required. Oil and gaskets are furnished by Contractor. d. Check condition of contacts for wear, pitting, etc. e. Check and calibrate safety controls. f. Meg compressor motor and oil pump motor and record readings. g. Check dash-pot oil in main starter, tighten all starter terminals and check contacts for wear. Check overloads. h. Tighten motor terminals, and control panel terminals. i. Clean oil strainer, replace filter and gasket where required. Material is furnished by Contractor. j. Tighten oil heater leads. k. Check operating of vane positioner. l. Change oil when so indicated by oil analysis unless done on an annual schedule. Oil is included and removed from property with manifest included. m. Brush condenser tubes, as required, to maintain manufacture’s design approach temperature. n. Verify proper operation of Chiller Variable Frequency Drive, if equipped. o. Report any uncorrected deficiencies noted as well as readings taken. 2. Written reports shall be provided to NCDOT following each regular inspection or emergency call. 3. Scheduled running preventive maintenance inspections during the operating season shall be made quarterly and included: a. Adjust operating and safety controls. Record readings. b. Complete operating log of temperatures, pressures, voltages, and amperages. c. Change oil in purge when required. Oil is included and removed from property, manifest must be provided by Contractor
