20"x8" Shutter damper with spring-return actuators, 24V
Item #: 99304
EFD is a shut-off damper. The damper is provided with 24 V motors with spring-return actuators. The EFD conforms to leakage less than 1% of the local design airflow rate at the local maximum static pressure. The outdoor/exhaust air damper prevents outdoor air migration into the building when the unit isn’t operating and also prevents the cold air from cooling down the building if the unit stops.
The EFD multi-leaf damper comprises a number of opposed blades, swivelling on nylon bearings in an extruded aluminium framework. The blades are connected via a system of linkages (protected) on the outside of the frame.
Nominal data | ||
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Voltage (nominal) | 24 | V |
Frequency | 60 | Hz |
Input power | 2 | W |
Protection/Classification | ||
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Enclosure class | IP54 |
Controller and Sensors | ||
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Permitted ambient temperature | -22 to 122 | °F |
Dimensions and weights | ||
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Weight | 4.7 | lb |
Model | A | B |
EFD 14-8 |
14 (256) |
8 (203) |
EFD 20-8 |
20 (508) |
8 (203) |
EFD 24-8 |
24 (610) |
8 (203) |
Dimensions in inches (mm). |