Document 85apQXexmRVxepw9Y8pzX0EOo

bcc C. Faton/j.. J. Rcder loOO D. R. Hansen 5120 J. A. Kris3 Mr. R. Courtney Ridgeway Lith p-graeh Hill i^-Oth Ave. F.aduond, Hash. 53032 October 25, 1971 A/t\ Dear Mr. Courtney: * This hotter concerns the conversion of your heat transfer unit froM Thar.jin.ol FA to Thereinol 55 Literature on 'fherninnl 39 in enclosed. V.Te are arranging for ~ tv.!o drums of `Ihorrin; 1 33 to bo sent to your attention at no c ha rye. You should drain the Yhonoinol FR from your system thoroughly -- this means removing all of the ??, fluid. Thor.ninol 33 can then bo added and operation of the system resumed. V,'e v; sulci Hies to remind you'that Thcrvinvl 95 is not classified as a fire resistant heat transfer fluid. Consequently> you-.:ray wish to consider the use of protective devices to minimise any added fire riehs. he surest that y~u consult with the insurer of your property relative to this roatter. Also enclosed are labels to be placed :n the containers of drained PR fluid for return t; the address shown, tie will pay the return freight. Your cooperation is appreciated. Sincerely, cs Enclosures Mote to bcc D. E. Roush Product Specialist Meat I'rar.sfpr Fluids Application is pattern \,axcr for margarine boxes. Initially used Fydraul f but switched to FR'-l be** cause of sludge problems. DSW 435313 STLCOPCB4088374