Lindab CCA Circular Perforated Diffuser User Manual

June 4, 2024
Lindab

Lindab CCA Circular Perforated 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 connection (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 diffuser can be wiped with a damp cloth.

Ordering exampleLindab-CCA-Circular-Perforated-Diffuser-
\(1\)

Order – accessories

  • Plinth: CCAZ – 2 – size

Dimension

Lindab-CCA-Circular-Perforated-Diffuser- \(2\)

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

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

Lindab-CCA-Circular-Perforated-Diffuser- \(3\)

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, correction of the near zone for -3 K and -6 K respectively.

Sound effect level

Sound effect level LW [dB] = LWA + Kok

Size|

63

|

125

| Centre frequency Hz

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.

Size| ****

63

| ****

125

| Centre frequency Hz

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

Lindab-CCA-Circular-Perforated-Diffuser-
\(5\)

Table 1 Correction of the near zone (a0.2, b0.2)

Under-

temperature Ti – Tr

| Maximum

velocity m/s

| Mean

velocity m/s

| Correction factor
---|---|---|---
 | 0.20| 0.10| 1.00
 | 0.25| 0.12| 0.80
-K3| 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

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