McKINLEY EXTERIOR IMPROVEMENTS_PRODUCT ...

Insulated Control Dampers®Greenheck’s ICD series of dampers was developed for applications where it is necessary to minimizethe transfer of heat or cold penetration and reduce condensation. The thermally broken frame providesan insulating barrier in the ductwork. Thermally broken blades separate the warm and cold air inside theductwork. Silicone jamb seals effectively seal the penetration of air from one side of the blade to the other.Design FeaturesVariable Symmetric Blade Design (VSB)Greenheck’s Variable Symmetrical Blade (VSB) designuses a combination of three symmetrical blade sizes (4,5, and 6 inch) to maximize the free area at any damperheight by reducing blade stop height. Traditional damperdesigns use a single blade width that requires oversizedblade stops, limiting free area when the blades areopen. The VSB design allows for consistent operatingcharacteristics regardless of airflow direction.• Increases Mounting Flexibility - Symmetrical bladeshave identical operating characteristics regardlessof airflow direction. This allows a Greenheck controldamper to be mounted in either direction of flow, anadvantage when installing with space constraints.• Increases Free Area - Traditional damper designswith a single blade width require oversized blade stops,limiting free area when the blades are open (Figure 1).Greenheck is able to reduce blade stop height, whichmaximizes free area, and increases damperperformance. AMCA certified pressuredrop lets you know that the published datais accurate to help you better design yoursystem.• Reduces Actuator Torque - If an unsymmetricalblade closes against airflow, a large amount of torqueis needed because the air distribution is unbalanced.Greenheck’s VSB design balances airflow on each sideof a symmetrical blade, reducing the torque required tooperate the damper. The use of symmetrical blades hasallowed Greenheck to reduce the sizes and quantities ofactuators used on our dampers.The ICD series damper blades feature thermally brokenairfoil shaped blade with polyurethane foam.Airflow worksagainstactuatorActuatorTorqueUnbalanced BladeRequires Higher TorqueAirflow worksagainstactuatorAirflowworks withactuatorActuatorTorqueBalanced BladeRequires Less TorqueParallel versus Opposed Blade OperationGreenheck’s ICD series dampers are offered with eitheropposed or parallel blade operation. Parallel bladeorientation is typically used when the damper operatesin two positions, open or closed. The damper bladesopen or close in the same direction. Opposed bladeorientation is typically used on dampers that modulateairflow. Adjacent damper blades will open or closeopposite one another.1/2 in.(13mm)1/2 in.(13mm)1/2 in.(13mm)1/2 in.(13mm)25 in.(127mm)5 in.(127mm)