This is a service / maintenance or supply contract in Hastings, Minnesota. Contact the soliciting agency for additional information.

Contractor awarded, here after referred to as the "Contractor'', will provide four (4) inspections at the following intervals: winter service, spring start up, and (2) mid-season (June, August) operating inspections. Dakota County will be responsible for the following: operating chiller, filling, chemically treating and draining loops seasonally, cleaning evaporator and condenser tube sheets during the off season, removing tube sheet end housing plates as needed for inspections. The successful Contractor will schedule inspections with the Facilities Management one (1) week prior to arrival to prevent unanticipated work when service person arrives. This allows the County proper time to prepare the affected chiller for each of the inspection listed. A) The price for spring service, operating inspections, and winter service for the centrifugal chillers include all equipment, materials, and supplies related to service/inspection work; such as, but not limited to, vacuum pump oil, all filter gaskets, 0-rings, etc. including laboratory tests of all refrigerants and inhibitors. B) All scheduled service work shall be scheduled for a continuous period of time or successive days, if necessary. C) Time and Material rates shall include a Contractor's one-year warranty on the work, including labor and materials. D) The work area is to be left in a clean and neat appearance by the Contractor. It will be the Contractor's responsibility to dispose of all waste created by the Contractor's work. E) Contractor will invoice the County following each service interval upon completion of work on all units. F) Maintenance sequence begins in April 2022 with the Seasonal Start-up Service. G) Provide a written inspection report to the site representative (to be left at chiller site), and send an electronic copy of the report to Adam.winn@co.dakota.mn.us Provide training of site personnel as requested. Also note any additional repairs or further work required to system. 1. OPERATION /TESTING Seasonal Start-Up Service A. Startup and verify that the unit is operating within design parameters such as flow rates, temperatures, pressures, voltages, etc. B. Verify proper operation of interlocking safety controls. C. Check refrigerant level, pressure and temperature. D. Check oil level, pressure and temperature. E. Check water flow pressure and temperature. E. Inspect oil sump temperature and heater operation. F. Check and test all operating and safety controls. G. Check all functions of the control panel. H. Check sensor signals to the control panel. I. Check operation of Purge. I. Complete a detailed Start-up Operating Log when unit has stabilized. J. Review results of Start-up Log with operating personnel. Midseason Operating Inspections (2) One (1) during the month of June, one (1) during the month of August A. Complete (2) mid-summer operating inspections. B. Review Owner's Operating Log. C. Verify that the unit is operating within design parameters such as flow rates, temperatures, pressures, voltages, etc. D. Verify proper operation of interlocking safety controls. E. Check refrigerant level, pressure and temperature. F. Check oil level, pressure and temperature. G. Check water flow pressure and temperature. H. Inspect oil sump temperature and heater operation. I. Check and test all operating and safety controls. J. Check all functions of the control panel. K. Check sensor signals to the control panel. L. Check operation of Purge system. M. Remove an oil sample from each compressor sump for Spectrochemical Analysis. Provide written report on test results. (August only annually) Annual Off-Season Service A. Review Owner's Operating Log. B. Check starter and control panel components: C. Check wire connections and tighten. D. Inspect all motor starter contacts. E. Clean out panels. F. Replace Oil filter. G. Oil replacement based on oil analysis test results. Contractor to advise on additional cost if replacement is required. H. Conduct complete purge system service including change oil, clean purge drum, purge condenser and oil separator, and replace gaskets and filter dryers. I. Inspect chiller's general condition and make recommendations for any necessary repairs or changes. J. Complete a leak test of the refrigerant circuit using an electronic leak detection meter. Report any leak indications.