DCN CIRCULAR DIFFUSERS

1 09/04

The DCN series diffusers are designed to be used in air-conditioning, ventilation

and heating.

They can be mounted in false ceilings or suspended from the ceiling.

Its circular shape assures a uniform air pattern in all directions, which provides

a high level of induction rate of the air in the atmosphere.

They can be used in premises up to 4 meters high and with a temperature

differential up to 12º, obtaining good results, not only in air speed but also in

sound pressure level in the comfort zone.

2 09/04

CLASSIFICATION

DCN Circular diffuser with fixed core.

DCN-MOD Diffuser specially designed

to replace a 600x600 false ceiling tile.

DCN-MOD/625 Diffuser specially

designed to replace a 625x625 false

ceiling tile.

DCN-MOD/675 Diffuser specially

designed to replace a 675x675 false

ceiling tile.

DCN-KLIN Hinged removable core

diffuser for the easy access to the

installations above the ceiling with no

need of tools, by means of PUSH

fasteners.

By slightly pressing on the invisible latch,

the core opens, remaining hinged on

one side. If necessary the core can be

easily removed for maintenance of HVAC

installations.

569569

569569

469469369369

A

FE

600-200600-250600-315

595

595595

500-250500-315600-160

400-200400-160

395

595495495

395E A

DCN-KLIN

545

545545

345

545445445

345F

54

600-315 595 569 545600-400 595 569 545

250

400

315355

200160

244

394349309

194154

C

C

E

45B

DCN - MOD

MOD/600

595595595595595595

MOD/625 MOD/675

620620620620620620

670670670670670670

EE EB B B121212121212

121212121212

151515151515

MATERIAL

Diffusers constructed from aluminium.

The frame of the –KLIN models is

constructed from galvanised steel.

The DCN diffusers are provided with a

seal on the back of the frame in order

that the perimeter in contact with the

ceiling is airtight.

PLDN Plenum box with a lateral circular

connection. It includes supports to hang

from the ceiling.Made in galvanised steel.

…-R Plenum box with a flow damper in

the spigot.

…/S/ Plenum box with an upper circular

neck connector.

…/AIS/ Plenum box thermo acoustically

insulated by a foam with a coefficient of

thermal conductivity of 0,04 w/mk.

This foam complies with the fire reaction

specifications:

UNE 23-727 M2

NFP 92-501 M2

DIN 4102 M2

R3E Flap damper assembled in the

diffuser neck.

Manually operated.

Constructed in galvanised steel.

ADDITIONAL ACCESSORIES

3 09/04

4 09/04

BOXSTAR Plenum box with a lateral

circular connection for DCN-MOD…

diffusers.

It includes supports to hang from the

ceiling. The crossbar is supplied

separately to be assembled manually on

the work site. Made in galvanised steel.

Plenum box to pile up. It spares more

than 50 % volume in relation to a

conventional plenum box.

-R Plenum box with a flow damper in

the spigot.

/AIS/ Plenum box thermo acoustically

insulated by a foam with a coefficient of

thermal conductivity of 0,04 w/mk.

This foam complies with the fire reaction

specifications:

UNE 23-727 M2

NFP 92-501 M2

DIN 4102 M2

BOXSTAR/S/ Plenum box with an upper

circular neck connection for DCN-MOD

diffusers.

It includes supports to hang from the

ceiling. Made in galvanised steel.

…-R Plenum box with a flow damper in

the spigot.

…/AIS/ Plenum box thermo acoustically

insulated by a foam with a coefficient of

thermal conductivity of 0,04 w/mk. This

foam complies with the fire reaction

specifications:

UNE 23-727 M2

NFP 92-501 M2

DIN 4102 M2

590

Ø248

350

BOXSTAR/S/

52

5 09/04

1) Connection into the PMN crossbar

by means of central screw. Suitable for

mounting in false ceiling with rectangular

duct. Constructed in galvanised steel.

1) Connection into the PFLEX crossbar-

neck by means of central screw. Suitable

for mounting in false ceiling with flexible

duct. Constructed in galvanised steel.

FIXING SYSTEMS

PLK Plenum box fixed to the diffuser,

suitable for -KLIN models. Plenum box

with an upper connection, made in

galvanised steel.

…-R Plenum box with a flow damper in

the spigot.

…/L/ Plenum box with a lateral

connection.

…/AIS/ Plenum box thermo acoustically

insulated by a foam with a coefficient of

thermal conductivity of 0,04 w/mk. This

foam complies with the fire reaction

specifications:

UNE 23-727 M2

NFP 92-501 M2

DIN 4102 M2

C D1

PLK/L/-R

H

D1

PLK-R

EF

EF

122

70

675 640670 313435

H

286

353

205

353

FE

600

400500

565595

395

495

365

465

C D1

248

313

198

435

370

320

6 09/04

DCN:

AA Anodised in matt silver.

R9010 Lacquer in white colour RAL 9010.

M9016 Lacquer in white colour similar to

RAL 9016.

RAL… Lacquer in other colours (RAL

specifications).

DCN-MOD:

R9010 Lacquer in white colour RAL 9010.

M9016 Lacquer in white colour similar to

RAL 9016.

RAL… Lacquer in other colours (RAL

specifications).

FINISHES

1) Connection into the plenum box by

means of central screw, to hang the

assembly from the ceiling with drop rods.

To regulate the flow in plenum box

mounting, we suggest …-R versions that

incorporates a damper in the plenum.

1) Supports to hang the assembly from

the ceiling with drops rods.

...-KLIN

7

160

500

Q ( m / h)

200

500

3Q (m / h)

FREE VELOCITY, PRESSURE LOSS AND SOUND POWER LEVEL,

L wa1= ( dB

(A))

DCN+R3E

400+0,3 +10,6

Lwa = Lwa1 + KfDPt1 = Kp x DPt

Lwa1 (Kf)

250

355

315

200

160

1,1 6,2+0,1 +10,7

1,25 6,6 -0,8 +6,2 1,3 5,5+0,2 +10,3

Dpt (Kp)Lwa1 (Kf)Dpt (Kp)Lwa1 (Kf)Dpt (Kp)Lwa1 (Kf)

1,3 5,8+0,6 +11,7 1,2 5,5+1,6 +10,4

1,3 5,4

Dpt (Kp)Lwa1 (Kf)Dpt (Kp)Lwa1 (Kf)Dpt (Kp)

Open Open

0.8 1.3 2

0.4 0.6100

1

1.2

1.62

2 32.6

3.345

250150 200 300 400

25

3035

4045

AL0,

3(m

)

3.6

AL

0,5

(m)

2.82.4

3.2

46

AL

0,2

(m)

9

4.64

5.376

86.6 10

10

5

1520

CORRECTION FACTOR FOR DPt AND Lwa1.

m2 m2 m3/h m3/h

400 .121 .070 630 1060355 .0949 .0550 495 970315 .0743 .0460 414 835250 .0462 .0330 297 595200 .0292 .02 180 425160 .0183 .016 144 300

100% 50%

FREE FACE AREA (m2).

400

DCN

355315

200250

160

4,22.5

Ak Afree Qmax.Qmin.

2.52.5

4,85

2.52.5

2.55,95

5,2

150

Dpt

(Pa

)

304050

10075

1

2

7

Vf

(m/s

)

3

4

56

98

10010

160250150 200 300 400

3

RECOMMENDED VELOCITY.

DCN Vminm/s m/s

Vmax THROW WITH CEILING EFFECT.

400

20001000700 1200 1500

250200

160 315355

250

200

355

400

315

2000

400250315

355

1000700 1200 1500

DCN-GR1-09/04

SERIESDCN

DCN

Note: In MadelMedia Octava band centre frequency in Hz.

H

B

1,8

CA

AL = A0.2

B

AL = C+H0.2AL = B+H0.2

8

DCN SERIES

-5

-10

0

= Q total at x

Q of supply.QrQ0

=i=Dtl t room - t xDtz t room - t supply

DCN-GR2-09/04

0

CORRECTON FACTOR FOR

THROW (L0.2) DT (-).

0.8

K l0.9 0.851 0.95

Kl = Correction factor for the throw.

0.75

D t ( C)0

CORRECTION FACTOR FORVERTICAL DIFFUSION (bV)FOR DT (-).

-10

-5

0.1 0.14.04

K h

.05 .06 .07.030.020

D t ( C)

Kh = Correction factor for the vertical diffusion.

315250

400355

200

0.2

0.2

150

AL´ ( Dt <0 ) = Kl x AL0.2

INDUCTION RATIO.

708090

100

405060

20

810

15315355

30

160

108754 632 2.5

AL 0.2 (m)

156

108 9 1.5 9

250

0.15

TEMPERATURE RATIO.

0.1

0.050.06

0.08

0.04

0.02

0.03

75 6432.521.5AL 0.2 (m)

10.015

160200

400

bv = Kh x Albv

0.2AL