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UL 555 classifies dynamic rated fire dampers for use in HVAC systems that are operational in the event of fire . Ratings UL555 Fire Resistance Rating Fire Rating: 1 1/2 hours Dynamic closure rating Maximum Velocity: 4000 fpm (20.3 m/s) vertical mount only, up to 24 in. x 24 in. (610mm x 610mm) 2000 fpm (10.2 m/s) vertical or horizontal mount, on all sizes. Maximum Pressure: 4 in wg (1 kPa) Construction Galvanized steel (in gauges required by UL listing R-13317) Installation All fire damper installations require the use of sleeves, angles and methods described in Greenheck Fire Damper Installation Instructions #452763, included with every damper shipment. Sleeves can be field fabricated or factory furnished as a complete damper/sleeve assembly. See Factory Sleeve * These dimensions are furnished approximately 1/4in. (6mm) undersize, except round and oval dimensions which are 1/8 in. (3mm) undersize. (Add sleeve thickness for overall sleeved damper dimension) 311/16" W* H* Stainless Steel Closure Spring Fusible Link (replaceable) 165.F[74.C]Standard (212. [100.C]available) HORIZONTAL MOUNT VERTICAL “K” side ) (94mm) D*+ 2 in. O* D* 6 in Max. W*+ 2 in. 6 in. Max. H* O* 21/2in. H* TYPE CR TYPE CO W*+ 2 in. O* W* TYPE C 6 in. Max. 21/2 in. Model DFD-155 meets the requirements for fire dampers established by: National Fire Protection Association (NFPA Standards 80, 90A & 101) BOCA National Building Codes IBC International Building Codes ICBO Uniform Building Codes (UBC Standard 43-7) SBCCI Standard Building Codes New York City (MEA listing #260-91-M) California State Fire Marshal (Listing #3225-981:102) “UL CLASSIFIED (see complete marking on product)” “UL CLASSIFIED to Canadian safety standards (see complete marking on product)” Standard 555 (Listing #R13317) Option below for details. Features • Stainless steel closure springs • Fusible links - 165.F (74.C) standard, 212.F (100.C) and 286.F (141.C) available • Horizontal or vertical mount available • Sealed for use in high pressure systems Optional Features • Security bars • One piece retaining angle (POC) • Tranhhsitions (C, CO, CR, & R) Sleeve Factory Sleeve Option DFD-155 Fire Dampers are available in factory furnished sleeves. Sleeves are galvanized steel and are available in 10 thru 20 ga.(1mm - 3.5mm) thicknesses and lengths up to 36 in. (914mm). “K” dimension specifies location of damper within the sleeve. Minimum is 4 in. (102mm), maximum is “L” less 4 in. (102mm), which allows for mounting angle H* installation and duct connection at each end of sleeve. If “K” dimension is not specified, it will be provided as one half of “L” dimension (damper centered in sleeve). Horizontally mounted dampers must be installed with the “K” dimension on the bottom side. Note: If using access doors, the doors should be installed on the “K” side of the damper. K Damper Location L Overall Sleeve Length W*CL Damper Frame Damper SIzINg DATA DFD-155 TYPE CR, CO, C, & R Dampers larger than maximum single section size are supplied as a factory assembly of two or more sections of equal size. These multi-section damper assemblies may have slightly less than 100% free area because of the mullions where damper sections join. The following charts shows minimum and maximum damper section sizes . Dimensions are in inches (mm in parentheses). C, CO, & CR transitions are positioned 1 in.(25mm) from bottom of sleeve. Inches (mm) Type CR Type CO & C Type R*1 Minimum Maximum Minimum Maximum Minimum Maximum Single Section 3 31 3 x 3 34 x 31 3 34 Vertical (76) (787) (76 x 76) (864 x 787) (76) (864) 70 x 44 Multi Section Vertical** NA 55 (1397) NA (1778 x 1118) or 58 x 55 NA 58 (1473) (1473 x 1397) Single Section 3 25 3 x 3 28 x 25 3 28 Horizontal (76) (635) (76 x 76) (711 x 635) (76) (711) Multi Section Horizontal** NA 31 (787) NA 46 x 31 (1163 x 787) NA 34 (864) Overall Damper Dimensions D*+2 Type CR D* O* W*+2H* Type CO W*+2W* O* Type C O* H* W* *1 With 2 in. (50mm) offset. Sizes adjust with 0 offset & 1 in. (25mm) offset. ** Consult factory for number of sections. Maximum Single Section Dimensions Type C 31in. (787mm) Max. 34 in. (864mm) Max. Type CO 31 in. (787mm) Max. 34 in. (864mm) Max. Type R Type CR 34 in. (889mm) max. 31 in. (787mm) Max. Type R transition is centered on damper frame. Dimensions are with 2 in. (50mm) offset. * All multiple section dampers, with transitions, will include a factory installed 8 in. (203mm) sleeve. H or D* O* H or D* O* 3 (76) 6 (152) 27 (686) 32 (813) 4 (102) 7 (178) 28 (711) 33 (838) 5 (127) 8 (203) 29 (737) 34 (864) 6 (152) 9 (229) 30 (762) 35 (889) 7 (178) 10 (254) 31 (787) 36 (914) 8 (203) 11 (279) 32 (813) 36 (914) 9 (229) 12 (305) 33 (838) 37 (940) 10 (254) 13 (330) 34 (864) 38 (965) 11 (279) 14 (356) 35 (889) 39 (991) 12 (305) 15 (381) 36 (914) 40 (1016) 13 (330) 16 (406) 37 (940) 41 (1041) 14 (356) 17 (432) 38 (965) 42 (1067) 15 (381) 19 (483) 39 (991) 43 (1092) 16 (406) 20 (508) 40 (1016) 44 (1118) 17 (432) 21 (533) 41 (1041) 45 (1143) 18 (457) ...