Art. no.: 6909
Shutter damper with spring-return actuators (24V)
Shutter damper EFD is a shut-off damper. The damper is provided with 24 V motors with spring-return actuators. EFD is manufactured to leakage performance class 3 according to EN 1751:1998 Annex C.2. Outdoor/exhaust air damper has the function to prevent the hot water battery from freezing and also prevent the cold air from cooling down
the building if the unit stops.
Design
The EFD multi-leaf damper comprises a number of opposed blades, swivelling on nylon bearings in a sheet metal framework. The blades are connected via a system of linkages (protected) on the outside of the frame. Maximum air temperature is 100°C.
| Nominal data | ||
|---|---|---|
| Voltage (nominal) | 24 | V |
| Frequency | 50; 60 | Hz |
| Input power | 5 | W |
| Protection/Classification | ||
|---|---|---|
| Enclosure class | IP54 |
| Ambient and duct temperature | ||
|---|---|---|
| Permitted ambient temperature | -30 to 50 | °C |
| Dimensions and weights | ||
|---|---|---|
| Duct dimension, inlet (height x width) | 400 x 800 | mm |
| Duct dimension, outlet (height x width) | 400 x 800 | mm |
| Weight | 8.82 | kg |
| Others | ||
|---|---|---|
| Duct connection type | Rectangular |
Pressure drop |
|
|
Airflow |
| A | B |
800 |
400 |
| Document filename | Document filetype | |
|---|---|---|
| LF-24_EN.pdf | Brochure | |
| LF24-S-US Declaration of Conformity_EN_DE_FR.PDF | Declaration |
