Suggested Specifications VAV Diffusers Models: T3SQ-1 - Analog T3SQ-1 Cooling Only Analog Electronic VAV Diffuser with heating/cooling changeover Furnish and install TITUS model T3SQ analog electronic VAV diffusers. Each diffuser shall be electronically controlled by a 24VAC actuator to infinitely vary the supply of cold air into the space by means of regulating a variable aperture damper, known as a control disc, vertically within the diffuser. Supply air from the variable geometry diffusers will discharged horizontally in a 360° pattern and will maintain constant air movement in the space throughout the range of volume variation from 100% down to 25%. The room sensing element shall be located in the master controller/thermostat unit. Each diffuser shall be adjustable to sense room temperature within the space between 65°F and 80°F. In large zones, up to 5 drone units connected to a master unit can be used. Each diffuser shall have an electronic wiring interface having three RJ-45 and 2 RJ-12 sockets for easy interfacing with master controller/thermostat and/or adjacent parallel master and drone diffusers. Each diffuser shall have a changeover sensor to determine supply air temperature and change the diffuser from heating to cooling operation. One ETL rated power module, model T3PM shall be required for every 6 T3SQ-1 diffusers without optional electric heaters or every five (5) with optional electric heaters. The power module shall have a 120V/24VAC transformer and a power filter to provide clean 24VAC to the diffusers. All connections, except line voltage to the power module or optional inlet electric heater, shall be made using plug-n-play RJ-12 or RJ-45 cables. Optional ETL listed inlet incoloy “black heat” sheathed electric heater shall install into the inlet of the diffuser and be protected by two automatic thermal cutouts and an airflow proving switch. Inlet electric heaters shall be controlled proportionally by means of triac heater controllers (SCR), each having an electronic wiring interface having three RJ-45 and 2 RJ-12 sockets for easy interfacing with master controller/thermostat and/or adjacent parallel master and drone diffusers. The inlet electric heater shall have a 2°F proportional band and be energized at 1°F below room temperature set point. Ceiling diffusers shall be square, architectural, panel face diffusers. The diffuser shall have an 18-gauge steel face panel mounted on an aerodynamically shaped, one piece, seamless backpan. The diffuser face panel must be field removable by means of four positive locking clips. The exposed surface of the face panel shall be smooth, flat and free of visible fasteners. The face panel cannot project more than 1/8-inch below the outside border of the diffuser backpan. The face panel shall have an aerodynamically shaped, hemmed edge. A single metal thickness on the edges of the face panel is not acceptable. Ceiling diffusers with a 24 x 24-inch full face shall have no less than an 18 x 18-inch face panel. The entire diffuser shall be constructed of steel, with an integral drawn inlet. The diffuser neck shall have a minimum 1 1/8-inch depth available for duct connection. Finish shall be a thermoset alky-melamine enamel paint, baked at 315°F. The paint hardness must be 2H to 3H. The paint must pass a 300-hour ASTM D1654 Corrosive Environments Salt Spray Test without creepage, blistering, or deterioration of film. The paint must pass the 500-hour ASTM D870 Water Immersion Test. The paint must also pass the ASTM D2794 Reverse Impact Cracking Test with 50-inch pound applied. Alternatives to the specified product must provide published performance ratings that meet or exceed the performance of the T3SQ ceiling diffuser. All test data shall be obtained in accordance with ANSI/ASHRAE Standard 70–1991, and ARI Standard 880–98. A copy of the certified test results shall be provided upon request. The VAV diffuser shall be ARI certified. Models: T3SQ-4 - Thermal T3SQ-4 Heating / Cooling Thermally Powered VAV Diffuser Furnish and install TITUS model T3SQ thermally powered VAV diffusers with heating / cooling changeover. Each diffuser shall be thermally powered to infinitely vary the supply of air into the space, in either heating or cooling mode, by means of regulating a variable aperture damper, known as a control disc, vertically within the diffuser. Supply air from the variable geometry diffusers will discharged horizontally in a 360° pattern and will maintain constant air movement in the space throughout the range of volume variation from 100% down to 25%. The thermal room sensing element shall be located behind an induction cap in the center of the diffuser panel and shall provide no more than 1°F thermal deadband between induced temperature and zone temperature. Each diffuser shall be individually adjustable to sense room temperature within the space between 68°F and 77°F. Each diffuser shall be individually adjustable for minimum airflow from 0 to 30%. Each diffuser is to be fitted with a single thermal supply air sensing element to automatically change from and to a cooling and heating mode and be able to infinitely vary the supply of air into the space in either mode. Each diffuser shall be self-contained and require no external power source to maintain space temperature throughout the range of operation. The diffusers shall carry the manufacturer’s 10-year warranty. Ceiling diffusers shall be square, architectural, panel face diffusers. The diffuser shall have an 18-gauge steel face panel mounted on an aerodynamically shaped, one piece, seamless back pan. The diffuser face panel must be field removable by means of four positive locking clips. The exposed surface of the face panel shall be smooth, flat and free of visible fasteners. The face panel cannot project more than 1/8-inch below the outside border of the diffuser back pan. The face panel shall have an aerodynamically shaped, hemmed edge. A single metal thickness on the edges of the face panel is not acceptable. Ceiling diffusers with a 24 x 24-inch full face shall have no less than an 18 x 18-inch face panel. The entire diffuser shall be constructed of steel, with an integral drawn inlet. The diffuser neck shall have a minimum 1 1/8-inch depth available for duct connection. Finish shall be a thermoset alky-melamine enamel paint, baked at 315°F. The paint hardness must be 2H to 3H. The paint must pass a 300-hour ASTM D1654 Corrosive Environments Salt Spray Test without creepage, blistering or deterioration of film. The paint must pass the 500-hour ASTM D870 Water Immersion Test. The paint must also pass the ASTM D2794 Reverse Impact Cracking Test with 50-inch pound applied. Alternatives to the specified product must provide published performance ratings that meet or exceed the performance of the T3SQ ceiling diffuser. All test data shall be obtained in accordance with ANSI/ASHRAE Standard 70–1991, and ARI Standard 880–98. A copy of the certified test results shall be provided upon request. The VAV diffuser shall be ARI certified.