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Page 5 of 6 <br /> Model BDD Back raft Dampers <br /> For Fan Models ARVE, CRBA, CRDA, CRBCA, CUBA, CUDA, SAED, SASD, SQDA, <br /> UBCA, & UDCA through size 25, SQBA through size 20, and CFS & SIS through size 12 <br /> Features: <br /> Frame <br /> • Frame is galvanized steel. <br /> • Conduit knockout provided for ease of electrical <br /> hook up. <br /> • Easy to motorize. (order BDDMK Motor Kit) <br /> • 2"deep frame. <br /> Blades ... <br /> • Blades are 26 gauge mill finish aluminum. <br /> • Blades open freely to allow full opening and closing. B„ <br /> • Felt seal on leading edge of blades for quiet closing A„and better protection from the weather. <br /> • Nylon bushing and stainless steel pivot pins. <br /> • Tie rod attached to all blades for simultaneous <br /> opening. <br /> • Spring assist to allow blades to open quickly. <br /> Ratings - 4.00 I- TYP. <br /> • Maximum recommended velocity is 2,000 FPM I <br /> • Temperature --40 F to 180 F } <br /> 4.50 , t =,--- -4 f 2.00 <br /> / <br /> SPRING TENSION <br /> Fan Damper ADJUSTMENT HOLES I , CONDIT KNOCKOUT <br /> Model Size Dimensions (AxB) AIR FLOW <br /> HORIZONTAL EXHAUST DAMPER <br /> 06,08,10 12.75" x 12.75" <br /> CRBA, 12,13,15 17.75"x 17.75" <br /> CRBCA, CRDA 16,18,20 24.75"x 24.75" HORIZONTAL SUPPLY DAMPER <br /> 24 28.75" x 28.75" <br /> -_ - AIR FLOW <br /> 06,08,10 12.75" x 12.75" <br /> CUBA, CUDA, 12,13,15 20.75" x 20.75" <br /> UBCA, UDCA 16,18 24.75"x 24.75" ' <br /> 2.00 <br /> 21,24 28.75" x 28.75" - - ' <br /> 12 12.75" x 12.75" <br /> SAED,SASD, 16 17.75" x 17.75" <br /> 4.00 TYP. <br /> ARVE 20 24.75" x 24.75" <br /> 25 28.75" x 28.75" OPTIONAL MOTOR <br /> CFS, SIS 1 9,10,12 24.75"x 24.75" (Model BDDMK) <br /> 06,08,10 13.75"x 13.75" MOTOR BRACKET <br /> __---12 - 17.75"x 17.75" <br /> L- - -- o o <br /> 13 19.75" x 19.75" MOTOR <br /> SQBA, SQDA 15 22.75" x 22.75" 8 ti2• °iik1i ,° MOTOR <br /> ARM AND <br /> LINKAGE <br /> 16 25.75"x 25,75" FRAME <br /> 18 28.75" x 28.75" o;�.�"marN�� <br /> 20 30.75" x 30.75" <br /> PARTIAL VIEW <br /> eCooiair <br /> ��3 <br />