Pneumatic Option 
Furnish and install ANEMOSTAT Model RF-11 “Slide In” retrofit kit of sizes and capacities shown on the plans. 

Each retrofit kit shall be designed to slip into rectangular ductwork through a rectangular opening in the side of the duct without the need for additional internal brackets or mounting hardware. The retrofit assembly shall have gasketing attached for low leakage installation. Adjustable mounting flanges shall be included with the kit for fastening of the retrofit to the ductwork. The retrofit kit shall be constructed of coated steel not lighter than 20 gauge. The retrofit kit shall be pneumatically controlled, pressure independent, and shall include a pneumatic velocity controller capable of a full 5 psi reset span regardless of the maximum and minimum flows, with air consumption not greater than 1.0 scfh @ 20 psi. The controller shall be capable of sequencing with a direct or reversing acting thermostat, normally open or normally closed damper, without adding or changing parts. The sequence of operation is based on Anemostat Control Package___________________. 

Flow taps shall be provided for gauge connection for flow measurement and balancing. The retrofit assembly shall include a multipoint averaging flow cross sensor, providing feedback to the velocity controller. The sensor shall amplify the duct velocity pressure for high resolution flow control capability. The volume damper shall be constructed from dual coated steel blades. A neoprene perimeter seal on the damper shall limit leakage to less than 2% @ 6.0” static pressure as rated in accord with AHRI 880. The damper shall be fastened to a heavy axle shaft, rotating in self lubricating, rustproof bearings. The damper axle shall be attached to a pneumatic motor by drive links. The actuator shall be of sufficient size to operate the damper up to 6” inlet static pressure for any retrofit kit size. 

Direct Digital Control Option 
Furnish and install ANEMOSTAT Model RF-11 “Slide In” retrofit kit of sizes and capacities shown on the plans. 

Each retrofit kit shall be designed to slip into rectangular ductwork through a rectangular opening in the side of the duct without the need for additional internal brackets or mounting hardware. The retrofit assembly shall have gasketing attached for low leakage installation. Adjustable mounting flanges shall be included with the kit for fastening of the retrofit to the ductwork. The retrofit kit shall be constructed of coated steel not lighter than 20 gauge. The retrofit kit shall be direct digital controlled, pressure independent, and shall include a microprocessor based controller and all other control hardware (supplied/installed by the retrofit valve manufacturer)(supplied by the ATC contractor/factory mounted and wired by the retrofit valve manufacturer) to meet the sequence/requirements of operation as described in Division __________ of these specifications. It shall be the responsibility of the DOC controls supplier to coordinate wiring and installation of the controls on the retrofit valve. The zone thermostats shall be provided and installed by the TC contractor. 

Flow taps shall be provided for gauge connection for flow measurement and balancing. The retrofit assembly shall include a multi-point averaging flow cross sensor (provided by the retrofit valve manufacturer), providing feedback to the digital controller. The sensor shall amplify the duct velocity pressure for high resolution flow control capability. The retrofit valve assembly, as is installed, shall have a minimum of three duct widths of straight hard duct directly upstream for uniform flow across the sensor. The volume damper shall be constructed from dual coated steel blades. A neoprene perimeter seal on the damper shall limit leakage to less than 2% of the maximum rated capacity @ 6.0” static pressure as rated in accord with AHRI 880. The damper shall be fastened to a heavy axle shaft, rotating in self lubricating, rustproof bearings. The damper axle shall be attached to an electric motor by drive links.