Lindab CCA Circular Air Diffuser Instructions

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

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