Suggested Specifications External Round Duct Retrofit ECV Basic Unit 1.Furnish and install TITUS Model (P) (A) (D) (E) ECV single duct, variable air volume retrofit terminals of the sizes and capacities shown in the plans. 2.The terminal casing shall be minimum 22-gauge galvanized steel, with a minimum of three concentric rolled beads to ensure units are round. 3.The damper shall be heavy gauge steel with shaft rotating in Delrin® self-lubricating bearings. Nylon bearings are not acceptable. Shaft shall be clearly marked on the end to indicate damper position. Stickers or other removable markings are not acceptable. The damper shall incorporate a mechanical stop to prevent overstroking and a synthetic seal to limit close-off leakage to the maximum values shown in the Damper Leakage table. 4.Actuators shall be capable of supplying at least 35-inch lbs. of torque to the damper shaft, and shall be mounted externally for service access. PECX Basic Unit 1.Furnish and install TITUS Model PECX single duct retrofit terminals of the sizes and capacities shown in the plans. 2.The terminal casing shall be minimum 22-gauge galvanized steel, with a minimum of three concentric rolled beads to ensure unit is round. 3.The terminal shall incorporate a multi-point, center averaging velocity sensor. A minimum of four measuring ports must be parallel to the take-off point from the sensor. Sensors with measuring ports in series are not acceptable. The sensor must provide a signal measurable by the controller at inlet velocities of 500 fpm. The sensor must provide control signal accuracy of ±5 percent, with the same size inlet duct at any inlet condition. 4.The terminal shall be equipped with a pressure independent pneumatic controller that can be reset to modulate airflow between zero and the maximum cataloged cfm. Maximum airflow limiters are not acceptable. EXX 1.Furnish and install TITUS Model EXX single duct retrofit terminals of the sizes and capacities shown in the plans. 2.The terminal casing shall be minimum 22-gauge galvanized steel. 3.The terminal shall incorporate a multi-point, center averaging velocity sensor. A minimum of four measuring ports must be parallel to the take-off point from the sensor. Sensors with measuring ports in series are not acceptable. The sensor must provide a signal measurable by the controller at inlet velocities of 500 fpm. The sensor must provide control signal accuracy of ±5 percent, with the same size inlet duct at any inlet condition.