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ORANGE COUNTY 233300-2 <br /> <br />Emergency Management Warehouse Building Dehumidification Air Duct Accessories <br /> <br /> <br />Quadrant Locks: Provide each low pressure balancing damper with a quadrant lock device on one end of 1 <br />shaft, and end bearing plate on other end for damper lengths over 12". Provide extended quadrant locks 2 <br />and end extended bearing plates for externally insulated ductwork. 3 <br /> 4 <br />Control Dampers: Provide dampers with parallel blades for 2- position control, opposed blades for modulating 5 <br />control. Dampers shall be constructed of 0.108-inch-minimum thick steel or 0.125-inch-minimum thick, extruded-6 <br />aluminum frames with holes for duct mounting; damper blades shall not be less than 0.064-inch-thick steel with 7 <br />maximum blade width of 8 inches and maximum length of 48 inches. Dampers installed in dishwasher exhaust 8 <br />ductwork, return air ductwork in natatoriums, and in other wet locations shall be constructed of Type 316 stainless 9 <br />steel, including shafts and damper hardware exposed to the airstream. All other dampers shall be constructed of 10 <br />G90 galvanized steel with zinc-plated shafts and hardware exposed to the airstream. 11 <br /> 12 <br />Secure blades to 1/2-inch-diameter axles with oil-impregnated sintered bronze blade bearings, blade-linkage 13 <br />hardware, ends sealed against spring-stainless-steel blade bearings, and thrust bearings at each end of 14 <br />each blade. 15 <br /> 16 <br />Operating Temperature Range: From minus 40 to plus 250 F. 17 <br /> 18 <br />Edge Seals: Use inflatable blade edging or replaceable rubber blade seals and spring-loaded stainless-19 <br />steel side seals, rated for Leakage Class I according to ANSI/AMCA 500-D. 20 <br /> 21 <br /> 22 <br />PART 3 – EXECUTION 23 <br /> 24 <br /> 25 <br />INSTALLATION 26 <br /> 27 <br />Adjust ductwork accessories for proper settings, install fusible links in fire dampers and adjust for proper action. 28 <br /> 29 <br /> 30 <br />EXTRA STOCK 31 <br /> 32 <br />Furnish extra fusible links to Owner, one link for every ten installed of each temperature range; obtain receipt. 33 <br /> 34 <br /> 35 <br />OWNER INSTRUCTION AND TRAINING 36 <br /> 37 <br />Provide Owner instruction and training in accordance with Section 019926. 38 <br /> 39 <br /> 40 <br />END OF SECTION 233300 41 <br />DocuSign Envelope ID: 7668B866-6C26-485C-9A45-DAAB5D4BD951