Lindab CCA Circular Air Diffuser Instructions
- June 4, 2024
- Lindab
Table of Contents
Lindab CCA Circular Air Diffuser
Description
Comdif CCA is a circular perforated displacement diffuser for freestanding installation. Behind the perforated front plate, CCA is equipped with individually adjustable nozzles, making it possible to alter the geometry of the near zone. The diffuser can be turned and has a circular duct connec-tion (MF measure), so the diffuser can be connected at the top or bottom. The diffuser is suitable for the supply of large volumes of moderately cooled air.
- The diffuser is suitable for the supply of large volumes of air.
- The geometry of the near zone can be adjusted using adjustable nozzles.
- Plinths can be supplied as accessories.
Maintenance
The front plate can be removed from the diffuser, making it possible to clean the nozzles. The visible parts of the dif-fuser can be wiped with a damp cloth.
Ordering example
Order – accessories
Plinth: CCAZ – 2 – size
Dimension
Size
| ØA
[mm]
| ØD
[mm]
| H
[mm]
| Weight [kg]
---|---|---|---|---
1207| 250| 125| 710| 5,00
1607| 300| 160| 710| 7,50
2010| 360| 200| 970| 13,0
2510| 400| 250| 970| 18,0
3115| 520| 315| 1490| 35,0
4020| 630| 400| 2010| 58,0
5020| 730| 500| 2010| 78,0
6320| 830| 630| 2010| 106
Accessories
Can be supplied with plinth.
Materials and finish
- Diffuser: Galvanised steel
- Nozzles: Black plastic
- Front plate: 1 mm galvanised steel
- Standard finish: Powder-coated
- Standard colour: RAL 9003 or RAL 9010 – white
The diffuser is available in other colours. Please contact Lindab’s sales department for further information.
Technical data
The near zone is given at an under-temperature of -3 K to a maximum terminal
velocity of 0.20 m/s. Conversion to other terminal velocities – see table 1,
correc-tion of the near zone for -3 K and -6 K respectively.
Sound effect level
Sound effect level LW [dB] = LWA + Kok
Centre frequency Hz
Size 63 125 250 500 1K 2K 4K 8K
1207| 8| -1| 1| 1| -9| -17| -28| -40
1607| 10| -1| 1| 1| -8| -17| -29| -33
2010| 10| -1| 3| 0| -9| -17| -27| -40
2510| 7| -1| 3| 0| -7| -18| -28| -41
3115| 13| 2| 3| -1| -8| -17| -29| -27
4020| 13| 2| 3| -1| -7| -16| -28| -43
5020| 7| 3| 2| 0| -6| -16| -19| -17
6320| 7| 3| 2| 0| -8| -16| -20| -17
Sound attenuation
Sound attenuation ΔL [dB] including end reflection.
Centre frequency Hz
Size 63 125 250 500 1K 2K 4K 8K
1207| 19| 14| 5| 3| 2| 1| 2| 1
1607| 16| 12| 4| 1| 2| 1| 2| 2
2010| 12| 8| 4| 2| 3| 2| 2| 2
2510| 12| 8| 5| 2| 1| 1| 1| 1
3115| 11| 8| 3| 2| 1| 1| 2| 2
4020| 9| 6| 1| 1| 1| 1| 1| 1
5020| 6| 4| 1| 1| 1| 1| 1| 1
6320| 5| 3| 1| 1| 0| 0| 0| 1
Nearzone
Table 1
Correction of the near zone (a0.2, b0.2)
Under- temperature
T i -T r
| Maximum velocity
m/s
|
Mean velocity m/s
| Correction factor
---|---|---|---
| 0.20| 0.10| 1.00
| 0.25| 0.12| 0.80
-3K| 0.30| 0.15| 0.70
| 0.35| 0.17| 0.60
| 0.40| 0.20| 0.50
| 0.20| 0.10| 1.20
| 0.25| 0.12| 1.00
-6K| 0.30| 0.15| 0.80
| 0.35| 0.17| 0.70
| 0.40| 0.20| 0.60
Lindab reserves the right to make changes without prior notice 2020-10-07