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Page 7 of 7 <br /> Model BDD Backdraft 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) A‘iiii• 2"deep frame. � <br /> Blades ° ° <br /> • Blades are 26 gauge mill finish aluminum. / <br /> • Blades open freely to allow full opening and closing. ° <br /> B" \ <br /> • Felt seal on leading edge of blades for quiet closing A.. <br /> 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 - TYP. <br /> • Maximum recommended velocity is 2,000 FPM <br /> • Temperature--40 F to 180 F } <br /> 4.50 1 2.00 <br /> 1 + <br /> SPRING TENSION <br /> Fan Damper ADJUSTMENT HOLES I CONDIT KNOCKOUT <br /> Model Size Dimensions (AxB) _ _ AIR FLOW <br /> 06,08,10 12.75"x 12.75" HORIZONTAL EXHAUST DAMPER <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 /> 06,08,10 12.75"x 12.75" AIR FLOW <br /> CUBA, CUDA, 12,13,15 20.75"x 20.75" 1 <br /> UBCA, UDCA 16,18 24.75"x 24.75" 1 12.00 <br /> 450 <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 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 /> 13 19.75" x 19.75" t ° °0 :1� MOTOR <br /> SQBA,SQDA 15 22.75"x 22.75" 8-1/2" ° MOTOR <br /> D ARM AN <br /> 16 25.75"x 25.75" � LINKAGE <br /> ,,,-FRAME <br /> 18 28.75" x 28.75" i&' 'am-�`1= <br /> 20 30.75"x 30.75" <br /> PARTIAL VIEW <br /> CCoo/air <br />