SECTION 15: REPLACEMENT PARTS47 of 5515.4 Heat ExchangerThe heat exchanger consists of a four-pass design with 1.75" outer diameter [409 stainless steel] tube. Thetube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [aluminizedsteel] [409 stainless steel].15.5 Flue Blower for Models UHD[T][M][X][S][R] 150-300IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPEIS USED WHEN REPLACING THESE ITEMS.Carry out a start-up after working on or changing a flue blower. See Page 28, Section 11.MODELUHD[T][M][X][S][R]150 - 300Flue Blower P/N 90710403Remove screws securingoutlet flange to the flueadapter.Refit in reverse order.Disconnect electricalconnections at plug in tabs.Remove screws securing fluefan mounting plate to ventbox.Remove screws securingmounting plate to fan. (Notshown)Refit in reverse.Use new gaskets.Ensure sealed joints.Ensure mounting plate orificeis clear and not obstructed.
