Orange County NC Website
Browse       Search
OC Sportsplex Pool HVAC Unit Replacement <br />PDC Project 23022 HVAC Water Treatment 23 25 00 - 4 <br />corrosion coupons (provide analytical laboratory analysis every three months),record make-up <br />meter readings,and perform any other tests necessary to validate that corrosion,scale,and <br />organic growth is being prevented. <br />D.Systems shall be operational,filled,started,and vented prior to cleaning. Use water meter to <br />record capacity in each system. <br />E.Place terminal control valves in open position during cleaning. <br />F.Verify that electric power is available and of the correct characteristics. <br />G.Reports: <br />1.Submit a written startup test report for each system placed into service. <br />2.A service report shall be prepared on site and submitted at the time of each service visit (with <br />copies immediately provided to the Owner and Commissioner),which shall include all <br />required test results and recommendations. <br />3.Additionally,provide final reports for approval to the Owner and Commissioner regarding <br />each site service visit,certified by an Officer of the CSP,within one week of any water <br />treatment activity. Such reports shall include the results of any field or lab tests. Reports <br />shall clearly state if the required water quality and maximum corrosion rates are being <br />achieved. <br />4.At a minimum,each report shall include the following information: <br />a.System Treated: <br />b.Date <br />c.Conductivity <br />d.pH <br />e.Total Iron <br />f.Total Copper <br />g.Bacteria(cfu)(monthly analytical laboratory analysis) <br />h.Coupon Corrosion Rates (three month analytical laboratory analysis) <br />i.9Make-up Water Quantity since Last Visit <br />j.Corrosion Inhibitor level (ppm) <br />k.Silica level (ppm) <br />3.02 CLEANING SEQUENCE <br />A.Concentration: <br />1.As recommended by manufacturer. <br />B.Use and dispose of chemicals and wastewater (including from existing piping networks)per the <br />Quality Assurance section of this specification.All costs of disposal shall be borne by the <br />contractor. <br />C.Hot Water Heating Systems (use the more stringent between the method below and <br />manufacturer's recommended method): <br />1.Apply heat while circulating,slowly raising temperature to 160 degrees F and maintain for 12 <br />hours minimum. <br />2.Remove heat and circulate to 100 degrees F or less;drain systems as quickly as possible <br />and refill with clean water. <br />3.Circulate for 6 hours at design temperatures,then drain. <br />4.Refill with clean water and repeat until system cleaner is removed. <br />D.Chilled Water Systems (use the more stringent between the method below and manufacturer's <br />recommended method): <br />1.Circulate for 48 hours,then drain systems as quickly as possible. <br />2.Refill with clean water,circulate for 24 hours,then drain. <br />3.Refill with clean water and repeat until system cleaner is removed. <br />E.Use neutralizer agents on recommendation of system cleaner supplier and approval of Engineer <br />and Owner. <br />F.Remove,clean,and replace strainer screens. <br />Docusign Envelope ID: D4F3B98E-0756-4A0C-A3AD-05AA32D39F1C