Model VC-28 & VC-29 VOLUME CONTROL …

1 SPECIFICATIONSFRAME: 5-1/2" x .125" THK. 6063-T5 EXTRUDED ALUMINUM HAT : 6-3/32" WIDE x .070 THK. 6063-T5 EXTRUDED : 3/8" SQUARE PLATED : : PLATED STEEL BAR AND CONCEALED IN JAMB TYPE : EXTRUDED SANTOPRENE ON BLADE EDGES WITH STAINLESS STEEL COMPRESSION AT : : 6" EXTENDED SHAFT. DAMPERS MORE THAN ONE PANEL WIDE OR HIGH AND OPERATED WITH ONE ACTUATOR MUST BE JACKSHAFTED. FACTORY SUPPLIED ACTUATORS ARE SHIPPED LOOSE TO BE MOUNTED EXTERNALLY WITH EXTENDED SHAFT KIT AS MAXIMUM PANEL SIZE: 60" W x 72" H. MINIMUM PANEL SIZE: 6" W x 6" H. PARALLEL BLADE (SINGLE BLADE) 6" W x 9" H. (OPPOSED BLADE) MINIMUM HEIGHT WITH JACKSHAFTING - 12"2.

2 "A" (WIDTH) AND "B" (HEIGHT) DIMENSIONS ARE OPENING SIZES. DAMPERS WILL BE FABRICATED 1/4" ANY VARIATIONS TO THE STANDARD SPECIFICATIONS MUST BE FACTORY APPROVED IN DAMPERS WITH MULTIPLE PANELS IN BOTH WIDTH AND HEIGHT MAY REQUIRE STRUCTURAL SUPPORT. IT IS RECOMMENDED THAT LARGE OPENINGS BE DESIGNED WITH STRUCTURAL MEMBERS SO THAT DAMPERS WILL SPAN EITHER WIDTH OR HEIGHT WITH A SINGLE PANEL AWV DOES NOT SUPPLY STRUCTURAL SUPPORT WITH STANDARD DAMPERS MAY BE INSTALLED VERTICALLY OR HORIZONTALLY, BUT WE DO NOT RECOMMEND INSTALLATION WITH THE BLADES AND AXLES IN THE VERTICAL STAINLESS STEEL SLEEVE BEARINGS ARE NOT RECOMMENDED FOR SALTY WIDE OPENINGB HIGH OPENINGVOLUME CONTROL DAMPER, AIRFOIL BLADES,ALUMINUM CONSTRUCTION, 150 F MAX.

3 VC-28 & VC-29 ESSDRN. BYDATE9/3/14 DWG. & 29 VOLUME CONTROL DAMPERS7301 INTERNATIONAL DRIVEHOLLAND, OHIOA MESTEK COMPANY american warmingand ventilatingAGENT / ORDER No.:ARCH. / ENGR.:PROJECT:CUSTOMER / ORDER No.:DATE:AWV PROD. No. ITEM TYPEVC-28 OR VC-29 OPTIONS"A" WIDEOPENING (IN.)"B" HIGHOPENING (IN.)No. OF PANELS(WIDE x HIGH)SPECIAL FINISHOIB BEARINGS300 SERIESSTAINLESS STEELLINKAGE & AXLESSILICONEBLADE SEALS5125126" STEELSLEEVE BEARINGSA merican Warming and Ventilating 7301 International Drive Holland, Ohio 43528 Tel: 419-865-5000 Fax: 419-865-1375 VC-28 & VC-29 VOLUME CONTROL Damper: Aluminum Construction 150 F Max. Temperature Airfoil Blades111 Form No. AWVVC-28/29 February 2010 Leakage: VC-28 / 29 dampers are rated for Class IA leakage as tested to AMCAS tandard 511-99; Certified Ratings Programs for Air CONTROL IA leakage is defined as 3 CFM/sq.

4 Ft. of damper face area at Closing torques followed the rules described below. Leakage isbased on temperature ranges from 40 F and 104 F and standard airdensity of :Pressure Limitations:Pressure limitations allow maximum blade deflection of 1/180 of span on 60" damper widths. Deflections in other damper widths less than48" at high pressures shown will result in a blade deflection less than 1/180 of Drop:Performance is based on AMCA Standard 500, Figure (in-duct mount), operating temperatures between 50 F and 104 F and a standardair density of lb/ft3. Actual pressure drop performance will vary based on damper size and exact installation configuration. The curvesshown below are parallel blade results, opposed blade results are Warming & Ventilatingcertifies that the Model VC-28 /29 damper shown herein islicensed to bear the AMCA ratings shown are based ontests and procedures performedin accordance with AMCAP ublication 511 and comply withthe requirements of the AMCAC ertified Ratings Program.

5 TheAMCA Certified Ratings Sealapplies to air performanceratings and air leakage Velocityfpm (m/s)Static Pressure Dropin. wg (Pa)12"W x 12"H830241812642063642485460 Damper "W x 24"H36"W x 36"H3 in. wg4 "W "W MaximumTorque Multipliers for Pressures Greater than 2 Pressure ( )Damper WidthMaximum Pressure is 2 WidthClosing Torque (in- )48"W Maximum7 in- "W Maximum5 in- Torque Applied to Extended ShaftMinimum Torque: 25 in-lbs12"W x 48"H48"W x 12"HawvA Mestek CompanySEAL TORQUED amper Width TORQUED amper Width TORQUED amper Width 24 36 48 12 24 36 48 12 24 36 48 12 172431372357123424 33445566371014246836 4964809551015213691348 6484104124613212848131760 801041281538172635510162172 9612415318192031426121925 Pressure Torque shown on chart is for 1 in.

6 Wg. use multipliers for higher pressuresVelocity Torque shown on chart is for 1000 fpm. Use multipliers for higher velocityVC-28/29 TORQUE DATAT orque Values are given in The torque required to operate a VC 28/29 CONTROL damper is the greatest torque value that the damper will see in operation. The tables shown give torque values for various face velocities,differential pressures, and sealing requirements. The torque required for a damper without seals is the torque due to velocity or pressure, whichever is greater. The torque required for a damper with seals is the torque due to velocity or pressure, whichever is greater. The torque required for a damper with seals is the torque due to velocity, pressure or sealing the damper, whichever is International Drive Holland, OH 43528 Phone: (419) 865-5000 Fax:(419) warmingand ventilatingA Mestek CompanyAbove values are based on 1 in.

7 Wg. differential pressure. Use multipliers below for greater PRESSUREMULTIPLIERS223344556677889910101 1111212131314141510 Above values are based on 1000 fpm face multipliers below for greater VELOCITY (fpm) : Care should be taken in designing systems requiring higher pressures and higher velocities which, in turn, will elevate the operating torque of the dampers. The shaded areas above depict dampers that may exceed the design limits of extended shaft operation (250 max.). When this value is exceeded the use of in-duct" or jack-shafted actuators is required.