Description
The VSD-1 variable swirl diffuser can be used for various ceiling heights from 4 m to 12 m. It enables turbulent airflow, long-range constant airflow and the Coanda effect – where cold air is dispersed below the ceiling.
Construction
The device includes a casing of nozzle shaped aluminium and 6 centrally adjustable blades.
Material and finish
Material options:
- galvanized sheet metal
- stainless steel sheet metal AISI 304 SB
Any colour from the RAL palette.
Drive
C - Manual drive
Central manual drive
E - Electric drive
Ready for electric drive. Upon request the electric motor drive can be added on the diffuser.
Electric motor drives:
- LM230A
- LM230A SR
- LM24A
- LM24A SR
T - Thermostatic drive
Thermostatic drive installed inside diffuser perceives a surroundings temperature and automatically adjusts the position of the blades. It does not need any additional source of energy, installations or settings. Diffuser is set in an optimal position and activated in the production. The wax element works in a temperature range from 22 ºC to 38 ºC. At temperature 38 ºC the blades are open at 85º angle. At temperature 20 ºC the blockade fixed on the holder stops the blades in position of 35º angle.
Angle of the blades depending on air temperature
Thermostatic mechanism for blade movement
Operation of diffuser with thermostatic drive
Accessories and Options
PL – plate dim. 595x595 for installation in prefabricated ceilings
ZM – ball impact protection in gyms
PP - perforated plate placed on the neck of the diffuser
INOX AISI 304 SB – stainless steel sheet metal AISI 304 SB
PB-3 - plenum box
PB-4 - plenum box
Dimensions
- 1 - diffuser
- 2 - mounting bar
- 3 - blades
- 4 - electric drive
Diffuser VSD-1 with plenum box PB 3
Diffuser VSD-1 with plenum box PB 4
| D | ø D | ø D1 | ø D2 | ø D3 | H | H1 | H2 | H3 | H4 |
|---|---|---|---|---|---|---|---|---|---|
| 125 | 123 | 173 | 225 | 98 | 80 | 170 | 170 | 280 | 220 |
| 160 | 158 | 220 | 260 | 123 | 90 | 195 | 195 | 315 | 255 |
| 200 | 198 | 280 | 300 | 158 | 105 | 230 | 230 | 365 | 305 |
| 250 | 248 | 345 | 350 | 198 | 120 | 270 | 270 | 420 | 360 |
| 315 | 313 | 425 | 415 | 248 | 150 | 320 | 320 | 500 | 440 |
| 400 | 398 | 530 | 500 | 313 | 180 | 385 | 385 | 595 | 535 |
| 500 | 498 | 660 | 630 | 398 | 220 | 470 | 470 | 720 | 660 |
Installation
Fitting on air shaft
Fitting on plenum box
Minimum Distance Between Diffusers
Minimum distance between two diffusers must be at least 5 times the diameter of the diffuser at minimum flow and 10 times the diameter of the diffuser at maximum flow.
Angle of Blades and Direction of Air Flow
Angle of air flow
Cold air
Warm air