Swegon CDKa User manual

1
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa/CKPa
CDKa/CKPa
Circular ceiling diffuser for supply air
General
Circular supply air diffusers for ceiling installation, with
aerodynamically shaped outled cones. They are suit-
able for either constant or variable flow and can handle
extremely large airflows at low sound levels.
Quick facts
Spread pattern can be shielded
Handles large airflows
Cleanable
Adjustable slot
Aerodynamically shaped inlet cone
Non-perforated diffuser face = CDK
Perforated diffuser face = CKP
Available in alternative colours
Included in the MagiCAD and CadVent databases
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Quick guide
A I R F L O W - S O U N D L E V E L
CDKa/CKPa l/s
Size 25 dB(A) 30 dB(A) 35 dB(A)
100 47 (40) 55 (48) 65 (58)
125 75 (70) 88 (80) 105 (95)
160 125 (115) 145 (130) 175 (150)
200 190 (175) 235 (205) 280 (240)
250 240 (250) 275 (300) 325 (350)
315 275 (310) 320 (360) 370 (410)
CDKa/CKPa ALSc l/s
Size Size 25 dB(A) 30 dB(A) 35 dB(A)
100 80-100 18 (17) 33 (30) 38 (35)
125 100-125 30 (28) 50 (40) 60 (52)
160 125-160 50 (46) 80 (65) 95 (85)
200 160-200 77 (72) 115 (92) 145 (130)
250 200-250 120 (100) 160 (130) 215 (160)
315 250-315 175 (155) 225 (180) 300 (225)
Data applies to 360° spread pattern. Data for combination
with ALS commissioning box is stated for a total pressure
drop of 50 Pa. Values in brackets are for CKP.

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
Technical description
Design
The CDK and CKP consists of two parts: an aerodynami-
cally shaped upper section with a connection spigot have
including a rubber sealing ring, and a removable non-
perforated diffuser face. Between the upper cone and the
diffuser face there is a slot which can be adjusted in two
positions. The diffuser face of the CDK is unperforated
and on CKP it is perforated in CKP is perforated. Both
CDK and CKP are equipped with acoustic insulation.
Materials and surface treatment
The upper part is manufactured in galvanized sheet steel.
The diffuser face is made of sheet steel. The whole dif-
fuser is painted inside and out with our pure white stand-
ard paint, RAL 9010. The unit is also available in other
standard colours: Dusty grey 7037, white aluminium RAL
9006, jet black RAL 9005, grey aluminium RAL 9007 and
signal white RAL 9003 (NCS 0500).
Accessories
Commissioning box:
ALS made of galvanized sheet steel. Includes removable
commissioning damper, fixed measurement unit and
acoustic insulation with a reinforced surface layer, to Fire
Resistance Class B-s1,d0 according to EN ISO 11925-2.
Frame:
SAR C. For the aesthetic installation with lowered diffuser.
Shielding strip:
SAV. To shield the spread pattern.
Planning
The diffuser has an aerodynamically shaped inlet spigot,
which means that it can handle extremely large airflows
at low sound levels.
Installation
The inlet spigot of the diffuser is fixed to the connecting
duct with blind rivets. The diffuser face is removed by
turning the springs which grip the pins of the diffuser face
through ¼ turn (see Figure 1). When the ALS commission-
ing box is used, the spigot between the ALS and the CDK
can be extended using normal circular duct up to 500 mm
long without needing to extend either the measurement
tubes or the damper cords. See Figure 1.
Commissioning with ALS
This must be carried out with the diffuser face in place.
The measurement tubes and the damper cords are pulled
out of the diffuser through the slots. The damper setting
is lockable. The k-factor is stated on the product label,
and is also in the relevant k-factor guide which can be
accessed at www.swegon.com. See Figure 1.
Maintenance
The diffuser can be cleaned when necessary using luke
warm water with added detergent. The duct system can
be accessed without the use of tools. The spreader plate
is removed by turning the springs which grip the pins
through ¼ turn. If the commissioning box ALS is used,
move the diffusion plate aside and the damper unit can
then be removed by unscrewing it from its fastening. See
Figure 1.
Environment
The Declaration of construction materials is available at
www.swegon.com.
Sizing
Sound level dB(A) applies to rooms of 10 m2 equivalent
absorption area
The throw l0.2 is measured under isothermal flow condi-
tions
Recommended maximal under temperature is 10°.
All technical data applies to the following slot widths:
20 mm for sizes 100 and 125
30 mm for sizes 160, 200, 250 and 315.
The slot widths can be increased to:
30 mm for sizes 100 and 125
40 mm for sizes 160, 200, 250 and 315.
This increase in slot widths cause reductions in throw,
pressure drop and sound levels with ca 20%.
To calculate the width of the airstream, air velocities in
the area of occupation or sound levels in rooms with
other dimensions, please refer to our selection soft-
ware ProAir web and ProAc, which are both available
at www.swegon.com.
All the technical data applies to a 360° spread pattern.
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Figure 1. Installation.

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa/CKPa
Sound data - CDK - Supply air
Sound power level Lw(dB)
Table KOK
Size Mid-frequency (octave band) Hz
CDKa 63 125 250 500 1000 2000 4000 8000
100 10 14 3 -1 -2 -6 -18 -26
125 10 12 2 -1 -2 -4 -14 -25
160 9 11 2 -1 -1 -3 -17 -27
200 11 7 3 -2 0 -3 -14 -25
250 13 10 7 2 -2 -8 -23 -31
315 14 11 9 0 -7 -12 -27 -32
Size Mid-frequency (octave band) Hz
CDKa + 63 125 250 500 1000 2000 4000 8000
ALSc
100 11 14 7 -1 -2 -11 -15 -21
125 10 13 8 -2 -4 -8 -17 -22
160 10 14 7 0 -6 -7 -16 -21
200 9 12 4 -2 -5 -5 -15 -18
250 10 14 5 -2 -5 -6 -16 -20
315 9 14 6 0 -4 -8 -15 -20
Tol. ± 2 2 2 2 2 2 2 2
Sound attenuation DL(dB)
Table DL
Size Mid-frequency (octave band) Hz
CDKa 63 125 250 500 1000 2000 4000 8000
100 22 17 14 9 6 5 8 9
125 21 17 12 7 5 5 9 9
160 20 14 10 5 6 5 10 9
200 18 14 9 7 5 5 10 9
250 17 11 8 8 5 7 12 10
315 17 11 9 9 6 11 13 10
Size Mid-frequency (octave band) Hz
CDKa + 63 125 250 500 1000 2000 4000 8000
ALSc
100 18 14 17 18 25 21 20 20
125 20 15 15 19 24 19 20 19
160 20 14 10 17 19 12 10 12
200 16 12 14 19 21 17 20 18
250 18 11 13 20 19 17 20 18
315 13 6 12 21 18 18 21 19
Tol. ± 2 2 2 2 2 2 2 2
Sound data - CKP - Supply air
Sound power level Lw(dB)
Table KOK
Size Mid-frequency (octave band) Hz
CKPa 63 125 250 500 1000 2000 4000 8000
100 10 10 2 0 1 -8 -22 -30
125 10 10 3 0 0 -8 -21 -28
160 9 6 1 0 0 -4 -15 -27
200 11 6 1 1 1 -5 -20 -28
250 13 7 2 1 1 -8 -24 -31
315 14 5 2 2 1 -8 -24 -31
Size Mid-frequency (octave band) Hz
CKPa + 63 125 250 500 1000 2000 4000 8000
ALSc
100 11 13 6 -1 -3 -10 -14 -21
125 10 12 7 -1 -4 -7 -17 -21
160 10 13 7 -1 -4 -7 -17 -20
200 9 10 4 0 -4 -7 -17 -19
250 10 11 4 1 -3 -8 -18 -20
315 9 9 3 4 -2 -10 -22 -24
Tol. ± 2 2 2 2 2 2 2 2
Sound attenuation DL(dB)
Table DL
Size Mid-frequency (octave band) Hz
CKPa 63 125 250 500 1000 2000 4000 8000
100 22 18 13 8 2 1 2 3
125 21 17 12 6 1 1 2 2
160 20 14 10 5 2 1 2 4
200 18 13 9 4 2 1 2 3
250 17 11 7 4 2 2 3 3
315 17 10 5 4 1 3 3 4
Size Mid-frequency (octave band) Hz
CKPa + 63 125 250 500 1000 2000 4000 8000
ALSc
100 18 14 16 17 23 17 14 14
125 20 15 14 18 21 14 13 15
160 20 15 12 17 20 14 13 16
200 16 12 13 19 18 14 14 15
250 18 10 11 19 15 12 14 14
315 13 6 7 19 14 10 10 13
Tol. ± 2 2 2 2 2 2 2 2

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
Engineering graphs - CDK - Supply air
Air flow - Pressure drop - Sound level - Throw
The dB(C) value is normally 6-9 dB higher than the
dB(A) value. For more accurate calculations, see the
calculation template in the chapter on Acoustics in the
Technical Information section of this catalogue.
Correction factor for shielded spread pattern, see
graphs and examples below the dimensioning graph.
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The graphs apply to a CDK installed in a ceiling.
The graphs are not to be used for commissioning.
The dB(A) values are for rooms with normal acous-
tic absorption of 4 dB.
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CDKa 100, 125, 160
p
t
Pap
t
Pa
100 200 300 400 500 m
3
/h
p
t
Pap
t
Pa
30 40 50 100 200 l/s
4
5
10
20
30
40
50
100
200
20
25
30
35
40 dB(A)
100 125
160
160
125
2 3 4 5 10
100
m
0,2
l
CDKa 200, 250, 315
p
t
Pap
t
Pa
400 500 1000 2000 m
3
/h
p
t
Pap
t
Pa
100 200 300 400 500 l/s 1000
5
10
20
30
40
50
100
200
20
25
30
35
40 dB(A)
200 250
315
315
250
5 10 20 30 40
200
m
0,2
l
Engineering graphs - CKP - Supply air
Air flow - Pressure drop - Sound level - Throw
The graphs apply to a CKP installed in a ceiling.
The graphs are not to be used for commissioning.
The dB(A) values are for rooms with normal acous-
tic absorption of 4 dB.
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The dB(C) value is normally 6-9 dB higher than the
dB(A) value. For more accurate calculations, see the
calculation template in the chapter on Acoustics in the
Technical Information section of this catalogue.
Correction factor for shielded spread pattern, see
graphs and examples below the dimensioning graph.
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CKPa 100, 125, 160 CKPa 200, 250, 315
ptPaptPa
300 400 500 1000 2000 m3/h
ptPaptPa
100 200 300 400 500 l/s
4
5
10
20
30
40
50
100
200
20
25
30
35
40 dB(A)
200
250
315
315
250
4 5 10 20 30
200
m
0,2
l
ptPaptPa
100 200 300 400 500 m3/h
ptPaptPa
30 40 50 100 200 l/s
3
4
5
10
20
30
40
50
100
20
25
30
35
40 dB(A)
100
125
160
160
125
2 3 4 5 10
100
m
0,2
l

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa/CKPa
Engineering graphs - CDK with ALS - Supply air
Air flow - Pressure drop - Sound level - Throw
The graphs are not to be used for commissioning.
= the minimum flow required to obtain suffi-
cient commissioning pressure.
The dB(A) values are for rooms with normal acous-
tic absorption of 4 dB.
The dB(C) value is normally 6-9 dB’s higher than the
dB(A) value. For more accurate calculations, see the
calculation template in the chapter on Acoustics in the
Technical Information section of this catalogue.
Correction factor for shielded spread pattern, see
graphs and examples below the dimensioning graph.
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CDKa 100 + ALSc 80-100
p
t
Pap
t
Pa
30 40 50 100 200 m
3
/h
p
t
Pap
t
Pa
10 20 30 40 50 l/s
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
CDKa 125 + ALSc 100-125
p
t
Pap
t
Pa
50 100 200 300 m
3
/h
p
t
Pap
t
Pa
20 30 40 50 l/s 100
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
CDKa 160 + ALSc 125-160 CDKa 200 + ALSc 160-200
p
t
Pap
t
Pa
100 200 300 400 500 m
3
/h
p
t
Pap
t
Pa
20 30 40 50 100 l/s 200
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
p
t
Pap
t
Pa
200 300 400 500 m
3
/h
p
t
Pap
t
Pa
30 40 50 100 200 l/s 300
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
2 3 4 5 10
m
0,2
l
D

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa 250 + ALSc 200-250 CDKa 315 + ALSc 250-315
Engineering graphs - CKP with ALS - Supply air
Air flow - Pressure drop - Sound level - Throw
The graphs are not to be used for commissioning.
= the minimum flow required to obtain suffi-
cient commissioning pressure.
The dB(A) values are for rooms with normal acous-
tic absorption of 4 dB.
The dB(C) value is normally 6-9 dB higher than the
dB(A) value. For more accurate calculations, see the
calculation template in the chapter on Acoustics in the
Technical Information section of this catalogue.
Correction factor for shielded spread pattern, see
graphs and examples below the dimensioning graph.
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CKPa 100 + ALSc 80-100 CKPa 125 + ALSc 100-125
ptPaptPa
30 40 50 100 200 m3/h
ptPaptPa
10 20 30 40 50 l/s
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
ptPaptPa
50 100 200 300 m3/h
ptPaptPa
20 30 40 50 l/s 100
10
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
D
ptPaptPa
200 300 400 500 1000 m3/h
ptPaptPa
50 100 200 300 400 l/s 500
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
2 3 4 5 10
m
0,2
l
p
t
Pap
t
Pa
300 400 500 1000 2000 m
3
/h
p
t
Pap
t
Pa
100 200 300 400 500 l/s
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
3 4 5 10 20
m
0,2
l

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa/CKPa
CKPa 160 + ALSc 125-160 CKPa 200 + ALSc 160-200
CKPa 250 + ALSc 200-250 CKPa 315-ALSc 250-315
ptPaptPa
100 200 300 400 500 m3/h
ptPaptPa
20 30 40 50 100 l/s 200
10
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
1 2 3 4 5
m
0,2
l
ptPaptPa
100 200 300 400 500 m3/h
ptPaptPa
30 40 50 100 200 l/s
10
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
2 3 4 5 10
m
0,2
l
ptPaptPa
200 300 400 500 1000 m3/h
ptPaptPa
40 50 100 200 300 l/s 400
10
20
30
40
50
100
200
300
400
500
20
25
30
35
40 dB(A)
100%
0%
2 3 4 5 10
m
0,2
l
p
t
Pap
t
Pa
300 400 500 1000 m
3
/h
p
t
Pap
t
Pa
100 200 300 400 l/s 500
10
20
30
40
50
100
200
300
400
20
25
30
35
40 dB(A)
100%
0%
2 3 4 5 10
m
0,2
l
Shielding off the spread pattern
The air stream can easily be shielded off if there are
obstacles, walls or other objects too close to the terminal.
In order to be able to use the graphs for "Airflow - Throw
length" and "Airflow - Presure drop - Sound level" when
the diffuser is shielding off in one sector, the airflow is
corrected as in the adjoining diagram.
Example:
Desired airflow: 100 l/s
Sector shielding: 90°
Follow the line on the graph for 90° shielding and read
off the correction factor of 1.2 on the vertical axis.
Mulitply the correction factor of 1.2 by the desired airflow
of 100 l/s, giving 120 l/s. Use this airflow (120 l/s) when
selecting throw length, pressure drop and sound level.
Figure 2. Correction factor for shielding.
1. Correction factor
2. Shielded (°)

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
Dimensions and weights
CDKa/CKPa
Size ØA Ød E ØJ L Weight, kg
100 192 99 36-46 125 51 0.6
125 228 124 36-46 160 56 0.8
160 304 159 46-56 215 73 1.3
200 380 199 46-56 280 87 1.8
250 456 249 50-60 350 95 2.5
315 568 314 50-60 450 114 3.7
ØJ = Hole-making size
CDKa/CKPa + ALSc
Size ØA B C ØD E
100 192 227 192 79 36-46
125 228 282 217 99 36-46
160 304 342 252 124 46-56
200 380 404 288 159 46-56
250 456 504 332 199 50-60
315 568 622 388 249 50-60
Size F G H K Weight,kg
100 177 107 200 50 1.8
125 202 122 270 80 2.7
160 243 151 315 80 3.5
200 292 183 375 100 4.5
250 340 211 465 115 6.3
315 420 255 575 140 9.3
Frame SARa C
Size M Ø L
100 40 187
125 40 223
160 65 299
200 65 375
250 100 451
315 100 563
Figure 3. CDK/CKP.
Figure 4. CDK/CKP + ALS.
Figure 5. Frame SAR C.

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CDKa/CKPa
We reserve the right to alter specifications. 20080315 www.swegon.com
CDKa/CKPa
Specification example
SD XX
Swegons circular cone diffuser of the type CDKa with
commissioning box ALSc, having the following functions:
Spread pattern can be shielded
Aerodynamically shaped inlet cone
Cleanable
Electrostatically powder-coated in white, RAL 9010
Cleanable commissioning box ALS with removable
commissioning damper, lockable setting, measurement
function with low method error and internal acoustic
insulation with reinforced surface layer.
Accessories:
Frame: SARa C aaa - bbb xx items
Sector shielding: SAVa aaa - bbb xx items
Size: AAAa with ALSc aaa-bbb xx items
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Order key
Product
Circular ceiling terminal for supply air AAAa -bbb
Non-perforated diffuser face
Perforated diffuser face
CDKa
CKPa
Nom. connection dimension, mm
Standard range:
Size: 100
125
160
200
250
315
Accessories
Commissioning box ALSc -aaa-bbb
For CDKa/CKPa ALSc
100:
125
160
200
250
315
80-100
100-125
125-160
160-200
200-250
250-315
Frame SARa C -aaa-bbb
For size:
100
125
160
200
250
315
187-40
223-40
299-65
375-65
451-100
563-100
Sector shielding SAVa -aaa -bbb
Size: 100, 125, 160, 200, 250, 315
Shielded sector: 90°, 180°