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ITEM 6.4. <br /> <br /> 'ty of <br />E <br /> <br />MEMORANDUM <br /> <br />River <br /> <br />FROM: <br /> <br />Mayor and City Council <br /> <br />Cliff Skogstad, Building Official <br /> <br />DATE: <br /> <br />January 31, 1996 <br /> <br />SUBJECT: <br /> <br />Repair of the Water Damage and <br />Correction of the Sprinkler System <br />at City Hall and the Library <br /> <br />As you are aware of the problems we have been having at City Hall regarding <br />the freezing of the sprinkler line and the water damage that occurred as a <br />result of the broken line, also the heating system at the library, I am hopeful <br />this memo will bring you up to date regarding the corrections of both <br />buildings. <br /> <br />The first building I wish to address is the library. On or about December 11, <br />1995, a heating coil in the air handling unit froze. This was due to the <br />improper calculation of make-up air coming into the air handling system. <br />After working with Rick Westling, the architect for the project, we <br />determined that there were miscalculations given for the amount of air <br />coming into this system, thus, freezing the coil in the unit. Rick Westling <br />contacted the contractors, replaced the coil, and put it back on-line. I met <br />with Greg from GR Mechanical at the library regarding the corrections. I <br />also met with Pneumatic Controls who were out there repairing one of their <br />wires for a control box. <br /> <br />After looking at the corrections of the system, Centrasota Mechanical will <br />have to come out to reposition this coil. It is allowing too much air to go by <br />the coil and not through the coil which is not making this system energy <br />efficient. <br /> <br />My biggest concern regarding the system is that the water boiler system do <br />have chemicals for rust and scale inhibitors but have nothing for freezing <br />problems. In my conversation with Greg from GR Mechanical, we talked <br />about turning this system into a glycol system. This product is an anti <br />freezing product. The same chemical is used in our boiler system at City <br />Hall. Even though the mechanics are working at this time, I feel that it <br />would be good insurance changing this system over to a glycol system, just in <br />case the mechanical system fails to operate as it has done in the past. Greg <br /> <br />13065 Orono Parkway · P.O. Box 490 · Elk River, MN 55330 · (612) 441-7420 · Fax: (612) 441-7425 <br /> <br /> <br />