2/11/EN/3
Ceiling Diffusers
Type DLQ . ADLQ
recommended for room heights
from 2.60 m to 4.00 m
Contents • Description
Description.............................................................. 2
Construction • Dimensions ..................................... 3
Installation • Mounting Details ................................ 4
Materials ................................................................ 4
Nomenclature......................................................... 5
Spectral Data.......................................................... 5
Acoustic Data ........................................................ 6
Aerodynamic Data.................................................. 8
Order Details.......................................................... 10
Description
Square ceiling diffusers type DLQ (steel) and ADLQ
(aluminium) are ideal for flush mounting in ceilings.
They are suitable for use in rooms with heights up to 4.00 m.
The recommended supply air temperature differential is
± 10 K. Ceiling diffusers can be used both for supply and
extract applications.
With a fixed blade arrangement the ceiling diffusers are
mainly suitable for horizontal discharge.
Specially developed ancillaries and plenum boxes, with
optional flow rate control dampers, are available to ensure
optimum discharge characteristics.
2
Construction • Dimensions
Size
D
H
K
Q1
Q2
250
158
294
206
248
198
300
158
282
256
298
248
400
198
392
356
398
348
500
248
392
456
498
448
600
313
495
556
598
548
625
313
495
581
623
573
Types DLQ and ADLQ are available as a diffuser face
complete with plenum box and side entry spigot, or with the
following ancillaries:
-...-AR with rear mounting ring
-...-AG with opposed blade volume control damper
adjustable from diffuser face (not available for size
250)
-...-C with double flap damper adjustable from diffuser
face
Construction
The face section of the type DLQ and ADLQ dif fuser
consists of a peripheral border, fixed air control blades and a
centre cone. The dif fuser face section is fitted or removed by
means of a central fixing screw. The screw head is then
covered with a decorative cap.
The use of versatile ancillaries such as the square flap
damper and equalising grid for connection to high velocity
ducts, or standard or duct mounting subframes for
installation in vertical ducts, results in great flexibility in
installation for this type of diffuser .
Q2- 58
42
50
K
3
Q2
2
H
øD
Q1
DLQ-A
ADLQ-A
4
5
Q2- 55
65
1
Q1
DLQ-AR
ADLQ-AR
DLQ-AK-M
ADLQ-AK-M
Dif fuser face
Plenum box
V olume control damper
Hanging brackets
Cross bar
Q2- 55
65
1
O
2
O
3
O
4
O
5
O
DLQ-C
ADLQ-C
Q2- 25
108
110
max .450
~15
38
Q2- 55
38
DLQ-AG
ADLQ-AG
QZ
3
Installation • Mounting Details • Materials
Installation • Mounting Details
rear ancillaries black (RAL 9005). The plenum box is rolled
galvanised sheet steel to DIN 17162.
All
Type DLQ or ADLQ ceiling diffusers can be adapted for use
in almost all situations Using the accessories available.
models and sizes are designed for installation in suspended
ceilings. The plenum box can be fixed to the ceiling slab
using standard hanging brackets. If the customer has a
vertical duct, the diffuser face can be installed using a cross
bar and centre screw or by direct connection between the
neck of the diffuser and the duct, using for example self
tapping screws. The ...-AR rear mounting ring is suitable for
this method.
For constructions without plenum box an installation
subframe is available. Some installation examples are
shown below.
Materials
Materials DLQ
The dif fuser face and rear-mounted ancillaries are in deep
drawn or formed sheet steel. The surfaces are phosphate
treated and stove-enamelled using an electro-dipcoat
process, with the diffuser face white (RAL 9002) and the
Q2+ 53
ADLQ
The dif fuser face is in extruded aluminium sections, natural
anodised E6-C-O. The rear ancillaries are in formed sheet
steel. The surfaces are phosphate treated and black
stove-enamelled (RAL 9005). The plenum box is rolled
galvanised sheet steel to DIN 17162.
Size
250
300
400
500
600
625
Q2
198
248
348
448
548
573
Q1
248
298
398
498
598
623
Q2+ 12
Standard subframe
Fixing in
brickwork
13
Q2
Fixing in
timber ceiling
Q2
13
130
130
Duct cross bar
Q1
Q1
Installation with duct cross bar
Installation with standard subframe
c
Recommended damper: ... -c
Recommended dampers: ...-AG and ... -
30
130
Q1-37
Q1- 41
Fixing in
false ceiling
Damper with duct cross bar installed
in a vertical duct
Q1
Mounting with special subframe
Recommended dampers: ...-AG and ...-c
Qz
Installation detail for high velocity ducts
Fixing of dif fuser
face via central screw
4
Fixing in
timber ceiling
Nomenclature • Spectral Data
H1
A eff
VL
VH1
in m: Distance between ceiling and occupied zone
in m2: Effective outlet area
in m/s: Time average air velocity at the wall
in m/s: Time average air velocity between two diffusers at
distance H1 from the ceiling
tz
in K: Temperature difference between supply and room air
tL
in K: Difference between core and room temperature at
distance L = A/2 + H1
or L = X + H1
pt
in Pa: Total pressure drop
LW A in dB(A): A-weighted sound power level
LWNC
: NC rating of sound power level
LWNR
: LWNR ≈ LWNC + 2
LpA, LpNC
: A-weighting or NC rating of room sound pressure
level L pA ≈ LW A —8 dB
LpNC ≈ LWNC —8 dB
L in dB/Oct.: Relative level with respect to LW A
LW in dB/Oct.: Octave band sound power level of regenerated noise
LW = LW A + L
Nomenclature
A
L
∆t z
X
H1
L
∆t L
v- L
∆t L
v- H1
.
V.
V
A
L
X
in l/s: Volume flow per diffuser
in m3/h: Volume flow per diffuser
in m: Spacing between two diffusers
in m: Horizontal plus vertical distance (X + H 1)
discharge to the wall
in m: Distance between centre of diffuser and the wall
Relative Spectra
Type
DLQ/ADLQ-AK
(Supply air)
DLQ/ADLQ-AK
(Extract air)
DLQ/ADLQ-A
DLQ/ADLQ-C
L for Damper Angle 0º
Size
Vef f
m/s
63
125
250
500
1000
2000
4000
8000
250
300
400
500
600
625
250
300
400
500
600
625
3
6
6
3
-2
- 7
- 17
- 25
- 26
4
5
5
2
-3
- 5
- 13
- 20
- 25
5
3
4
1
-4
- 4
- 11
- 18
- 22
6
2
2
0
-5
- 4
- 9
- 16
- 20
3
10
5
3
-3
- 7
- 17
- 24
- 27
4
7
3
2
-3
- 5
- 13
- 20
- 24
5
4
1
0
-4
- 4
- 11
- 18
- 21
6
1
-1
-2
-5
- 4
- 9
- 16
- 19
250
300
400
500
600
625
3
9
2
3
1
- 12
- 26
- 31
- 35
4
9
3
2
0
- 7
- 19
- 28
- 30
5
7
2
1
-2
- 4
- 15
- 26
- 29
6
5
0
-2
-4
- 3
- 12
- 26
- 29
3
3
2
3
1
- 11
- 27
- 35
- 38
4
6
3
2
0
- 7
- 20
- 31
- 34
5
7
3
1
- 1
- 5
- 15
- 28
- 31
6
8
2
-1
-2
- 3
- 12
- 26
- 30
3
6
-1
2
0
- 8
- 20
- 27
- 32
4
8
-1
1
-1
- 4
- 14
- 23
- 26
5
9
-2
-2
-3
- 3
- 10
- 22
- 26
6
8
-4
-5
-5
- 3
- 8
- 21
- 25
3
10
2
3
0
- 10
- 26
- 31
- 35
4
8
2
2
0
- 6
- 19
- 27
- 30
5
5
1
0
-2
- 4
- 14
- 24
- 28
6
3
0
-2
-4
- 8
- 11
- 23
- 26
250
300
400
500
600
625
DLQ/ADLQ-AG
Octave band centre frequency
Hz
Ef fective
jet velocity
300
400
500
600
625
5
Acoustic Data
Octave band
centre frequency 63
in Hz
LWA
39
in dB(A)
L
+6
in dB(A)
LW
45
in dB
Example
Data given:
DLQ-AK (supply air); size 600
.
Volume flow per diffuser V = 300 I/s
Required: Octave sound power level of regenerated
noise Lw
Diagram 1:
LW A = 39 dB(A)
Pt = 20 Pa
Vef f =
125
250
500 1000 2000 4000 8000
39
39
39
39
39
+6
+3
–2
–7
– 17 – 25
45
42
37
32
22
39
14
Sound power level and pressure drop
300
= 2.7 m/s
0.1100 • 1000
Vef f ≈ 3 m/s
1
Correction to Diagram 1: Damper setting
Sound power level and pressure drop
Type DLQ/ADLQ-AK (supply air)
Size
100
250 300
400
Size
500
600/625
250
70
50
Pressure drop ∆ pt in Pa
90o
Pt
X 1.0
_
_
X 1.1
+1
+1
X 1.1
_
_
X 1.7
+1
+1
X 2.6
+2
+1
X 3.0
+3
LWA
LWNC
400
LWNC
Pt
LWA
20
LWNC
Pt
500
10
7
600
. 3 20
625
30 1/s 50
70 100
3
100 m /h 200 300
2
LW A
LWNC
Pt
V
200 300
500
1000
Size
100
250
300
400
Pt
LWA
3
–3
–
X 3.6
+1
+3
0o
45o
9 0o
250
X 1.0
_
_
X 1.1
_
_
X 1.7
+1
_
X 1.0
_
_
X 1.2
+2
+2
X 1.3
+1
_
X 1.9
+4
+4
X 2.6
+4
+3
X 3.6
+6
+5
X 4.1
+7
+5
X 4.1
+4
+3
LWNC
Pt
300
20
LWA
LWNC
Pt
LWA
LWNC
Pt
500
10
7
600
LW A
LWNC
Pt
LWA
LWNC
Pt
5
625
500 700 1000
x1.0
+3
X 3.4
+3
+4
X 3.6
+4
+5
Pt
LWA
400
100 m 3/h 200 300
x 1.0
_
_
+1
X 1.3
+1
+1
X 1.2
+2
+2
X 1.2
_
_
Damper angle
30
200 300
X1.0
_
_
X 1.2
+1
Size
500
50
70 100
X 1.0
_
_
Correction to Diagram 2: Damper setting
600
625
30 1/s 50
X 1.0
_
_
2000
70
3
20
LWA
LWNC
LWNC
500 700
Sound power level and pressure drop
Type DLQ/ADLQ-AK (extract air)
Pressure drop ∆ pt in Pa
45o
Pt
LWA
5
V
0o
300
30
.
Damper angle
500 700
2000
6
LWA
LWNC
X 1.0
_
_
X 1.0
_
_
x 1.0
_
_
X 1.5
+1
+1
X 1.8
+1
_
x 1.0
X 1.9
–
–
3
3
–
–
1
3
39
– 26
13
Acoustic Data
Correction for DLQ/ADLQ-AG, Diagram 5
Correction for DLQ/ADLQ-C, Diagram 4
Damper opening
Size
100%
Pt
LWA
LWNC
Pt
LWA
LWNC
Pt
LWA
LWNC
Pt
LW A
LWNC
Pt
LWA
LWNC
Pt
LWA
LWNC
250
300
400
500
600
625
3
50 %
X 4.3
+ 24
+ 24
X 2.8
+ 17
+ 17
X 3.1
+ 18
+ 18
x 3.6
+ 18
+ 19
x 1.9
+ 11
+ 9
x 2.4
+ 18
+ 16
X 10
_
_
X 1.0
_
_
X 1.0
_
_
X 1.0
_
_
x 1.0
_
_
x 1.1
+1
+2
Size
25 %
x 9.8
+ 36
+ 37
x 7.7
+ 33
+ 35
x 12..4
+ 40
+ 43
x 18.0
+ 45
+ 50
x 5.5
+ 30
+ 30
x 13.7
+ 47
+ 49
Pt
LWA
LWNC
Pt
LWA
LWNC
Pt
LWA
LWNC
Pt
LW A
LWNC
Pt
LWA
LWNC
300
400
500
600
625
Damper opening
50 %
X 2.3
+ 17
+ 17
X 3.1
+ 21
+ 22
X 4.0
+ 24
+ 25
x 3.5
+ 23
+ 25
x 3.5
+ 24
+ 26
100%
X 1.0
_
_
X 1.0
_
_
X 1.0
_
_
X 1.0
_
_
x 1.0
_
_
Sound power level and pressure drop
Type DLQ/ADLQ-A
80
Size 250 300
400
500
600
625
60
50
40
Pressure drop ∆ pt in Pa
30
20
15
10
8
6
5
40 60 80 100
200
400 600
V 20 l/s
100m3/ h 200
400 600 1000
2000
.
4
1000
4000
5
Sound power level and pressure drop
Type DLQ/ADLQ-C
Size 250 300
400
500 600/
625
80
Sound power level and pressure drop
Type DLQ/ADLQ-AG
100
Size 300
400
500
600
625
80
60
60
50
40
40
Pressure drop ∆ pt in Pa
Pressure drop ∆ pt in Pa
30
20
15
10
8
6
5
. 30 40 l/s 60 80 100
V
150 200 m3/ h 400
30
20
15
10
8
200
600
400
1000
600
6
5
.
V 50 l/s 80 100
200m3/ h 400
1000
2000 3000
7
200
600
400
1000
600
2000
1000 1500
3000
5000
25 %
x 7.1
+ 34
+ 38
x 10.9
+ 39
+43
x 13.5
+ 42
+ 47
x 14.4
+ 45
+ 50
x 17.4
+ 47
+ 52
Aerodynamic Data
Example
Data given:
DLQ-AK, size 600
.
Volume flow per diffuser
V = 300 l/s
Supply air temp. difference
tz = – 6 K
Spacing between two diffusers
A = 6.50 m
Distance between ceiling and occupied zone
H1 = 1.20 m
Distance between centre of diffuser and the wall X = 4 m
Throw towards wall, horizontal plus vertical
distance
L = X + H1 = 5.2 m
Diagram 1:
Sound power level and pressure drop
HW A = 39 dB(A) (LWNC = 33 NC)
pt =20 Pa
6
Diagram 6:
L = A/2 + H 1
L = 3.25 + 1.20 = 4.45 m
tL/ tz = 0.15
tL= – 6 x 0.15= – 0.9 K
L = 5.20 m
tL/ tz = 0.11
tL = – 6 x 0.11 = – 0.66K
between two diffusers
Diagram 1 1:
vH1 = 0.12 m/s
vL = 0.22 m/s
Air velocity
between two diffusers
at the wall
Temperature quotient
at the wall
Effective outlet area
Temperature Quotient
0.6
Size
250
A eff in m2
0.4
300
400
500
600
625
0.0095 0.0175 0.0370 0.0675 0.1100 0.1230
Temperature quotient tL/ t Z
0.3
0.2
0.15
0.1
0.08
0.06
0.04
7
Air velocity
H1 =
1.0 1.2
4
5
Distance L in m
6
8
10
Air velocity
H1 =
m3/ h
80
60
50
40
30
290
220
180
145
110
0.
0
40 .50
l/s
Size 300
1.6 2.0 m
.
V =
0.80
0.60
0.50
–
vL in m/ s
l/s
150
100
75
50
40
m3/ h
540
360
270
180
145
0.50
0.30
0.20
0.15
2
3
Spacing
4
5
6
8
0.15
10m
0.
10
0.
10
0.60
0.
15
0.
15
0.20
0.80
0.40
0.
20
0.
20
0.30
–
vH1 in m/ s
0.40
0.
30
1.0 1.2
0.
0
40 .50
.
V=
–
vH1 in m/ s
8
Size 250
1.6 2.0 m
A or Distance L
8
2
3
Spacing
4
5
6
A or Distance L
8
10m
–
vL in m/ s
3
0.
30
2
Aerodynamic Data
H1 =
.
V = l/s
Air Velocity
1.0 1.2
1.6
Size 600
2.0 m
.
m3/h
V =
0.80
900
720
540
360
270
0.60
0.50
0.
0
40 .50
250
200
150
100
75
0.30
–
vH1 in m/ s
0.
30
0.40
l/s
m3/h
450
400
300
250
220
1620
1440
1080
900
790
0.80
0.60
0.50
0.40
0.30
0.
20
0.
20
0.20
0.
15
0.
15
0.20
0.15
0.15
Air Velocity
1.0 1.2
1.6
8
12
Size 500
2.0 m
.
m3/h
1080
900
720
540
485
0.
0
40 .50
l/s
300
250
200
150
135
3
Spacing
4
5
6
A or Distance L
1.0 1.2
.
500
400
300
250
200
0.60
m3/h
1800
1440
1080
900
720
0.50
0.30
0.20
0.15
2
3
Spacing
4
5
6
8
0.15
10m
0.
10
0.
10
0.60
0.
15
0.
15
0.20
0.80
0.40
0.
20
0.
20
0.30
10m
Size 625
V = l/s
0.50
8
1.6 2.0 m
0.80
0.40
0.
30
2
Air Velocity
H1 =
V =
–
vH1 in m/ s
10m
0.
10
6
0.
0
40 .50
H1 =
5
–
vH1 in m/ s
10
4
A or Distance L
0.
30
3
Spacing
–
vL in m/ s
0.
10
2
A or Distance L
9
2
3
Spacing
4
5
6
A or Distance L
8
10m
–
vL in m/ s
–
vH1 in m/ s
11
Size 400
2.0 m
0.
0
40 .50
1.6
0.
30
1.0 1.2
–
vL in m/ s
Air Velocity
H1 =
–
vL in m/ s
9
Order Details
Order Code
These codes do not need to be completed for standard products
DLQ-AK-M
Type
DLQ
ADLQ
Dif fuser face
With ancillary
With plenum box
Damper in plenum
box spigot
500
0
0
M
RAL 9010
State colour
250
300
400
500
600
625
Size
A
AR
AG 1)
C
AK
S1
Not used
0
Standard finish
DLQ-RAL 9002
ADLQ-E6-C-0
S1 Painted to RAL...
S2 ADLQ anodised to Euro-Standard
E6-C-31 to C-35
2)
0 Without installation subframe
E1 Duct cross bar
G1 Standard subframe
H1 Special subframe
Accessories
QZ Square damper and flow straightener
1) Not available for size 250
(Order accessory QZ separately stating size)
2) Not for types .... -A, ....-AG and ....-C
Specification Text
hours without deterioration (DIN 50017). The plenum box is
galvanised sheet steel to DIN 17162.
Square ceiling diffuser for flush mounting, suitable for
horizontal discharge, comprising diffuser face with mitred
perimeter border, border has rear sealing strip, fixed air control
blades, central fixing screw with decorative cap. Optional
ancillaries: rear mounting ring, opposed blade damper
adjustable from the front face, double flap damper adjustable
from the front face; side entry plenum box with circular spigot,
damper if required, hanging brackets for suspending the
assembly from the ceiling slab, diffuser face easily removable
and held in position with central fixing screw.
Materials ADLQ:
The dif fuser face is in extruded aluminium sections, natural
anodised E6-C-0, rear ancillaries in formed sheet steel,
surfaces phosphate treated and stove-enamelled using an
electro-dipcoat process, black (RAL 9005), finish resistant to
saturated environment for a minimum of 100 hours without
deterioration (DIN 50 017). The plenum box is galvanised
sheet steel to DIN 17162.
Materials DLQ:
The dif fuser face and rear accessories are in deep drawn or
formed sheet steel. The surfaces are phosphate treated and
stove-enamelled using an electro-dipcoat process, diffuser
face white (RAL 9002) and rear accessories black (RAL 9005),
finish resistant to saturated environment for a minimum of 100
Order Example
Make:
TROX
Type:
DLQ-AK-M / 500
Ancillaries: QZ/ 500
10