Series CSR – Ceiling Diffusers Square Face, Round Neck
Model CSRL
CSRL Diffuser
Anti-smudging design for long lasting clean appearance.
The unique design of the CSRL eliminates much of the smudging and
streaking encountered with many types of ceiling diffusers.
Most airborne dirt deposited on the ceiling adjacent to air outlets comes
from one or both of two sources:
1.Through the ducts in the primary air stream.
2.From the occupied air space in the secondary or induced air
stream.
However, the uniform, 360º discharge pattern of the CSRL minimizes low
pressure areas next to the outlet. It forms an effective barrier between
the ceiling surface and the dirt-carrying secondary air.
Excellent for variable volume applications
The uniform, nearly horizontal jet from the outer cone maintains effec­
tive distribution even when the air volume varies over a considerable
range. When selecting, check both maximum and minimum perform­ance.
The example 250mm Dia. x 600 CSRL at 0.257 m³/s and NC32 would throw
2.4 m, and could be turned down by 60% to 0.104 m3/s and 0.9 m.
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The primary air pattern makes the difference
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The Model CSRL primary air flow pattern is defined by the 0.5 m/s
isovel shown below (fig. 1). This isovel (envelope of m/s velocities) is 9
obtained with 250mm Dia. x 600 CSRL diffuser handling 0.179 m3/s.
9
,
Features:
• CSRL consists of an outer cone and an inner cone assembly.
• Easy-operating spring lock for quick removal and replacement of inner
cone assembly. Speeds installation.
• All cones are stamped, one-piece construction. Smooth, clean surfaces,
no corner joints.
Frame Types:
Type 1 Surface mounting flange for all types of ceilings.
Type 2 Lay-in for inverted T-bar ceiling systems.
Others to special order.
Accessories:
Model BD-85 butterfly damper. Model EGR equalizing grid.
Model SB sectorising baffles.
B
Ceiling Opening Or
Module Size
300 x 300
Diffusers
600 x 600
Nominal Duct
Diameter
100, 125, 150,
175, 200
200, 250, 300,
350, 375
C
D
E
Number
Of Cones
25
28
20
4
25
65
125
4
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%
%
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Fig 1.
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Material:
0.75 electro-galvanised steel
Multi Directional:
Use Model SB sectorising baffles to eliminate air supply and throw to
any sector of throw radius, in 45º modules. When selecting, use full flow
figures to obtain throw, and cal­culate true air quantity as appropriate
proportion. E.g. Two 45º baffles would produce a gap in the air distribution
coverage as shown in figure 2. True air delivery would be 0.179 x 0.75 =
0.135 m3/s.
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Fig 2.
Note: Regardless of size, the
primary air flow pattern is uniform,
circular-to­ square
© holyoake industries limited – 2006
Performance Data – Series CSR
Model CSRL
300 x 300 Ceiling Opening or Module
NC20
Size
Ceiling
Duct DIA opening or
module
300
100 mm
x
300
125 mm
300
x
300
150 mm
300
x
300
175 mm
300
x
300
200 mm
300
x
300
NC30
NC40
Neck Velocity, m/s
2.04
2.55
3.06
3.57
4.08
4.59
5.10
6.12
7.14
8.16
Vel. Press., Pa
2
4
6
8
10
13
16
22
30
40
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
5
0.017
0.3-0.6-1.2
4
0.025
0.6-0.6-1.5
4
0.038
0.6-0.9-1.8
5
0.050
0.6-0.9-2.1
7
0.066
0.9-1.2-2.4
-
7
0.021
0.6-0.6-1.5
7
0.032
0.6-0.9-1.8
7
0.047
0.6-1.2-2.1
11
8
0.064
0.9-1.2-2.7
14
11
0.083
0.9-1.5-3.0
16
11
0.025
0.6-0.9-1.5
10
0.038
0.6-0.9-2.1
12
10
0.057
0.9-1.2-2.7
17
11
0.076
1.2-1.5-3.0
19
16
0.099
1.2-1.8-3.3
22
14
0.029
0.6-0.9-2.4
14
13
0.044
0.9-1.2-2.4
17
13
0.066
0.9-1.5-2.7
22
15
0.090
1.2-1.5-3.3
25
21
0.116
1.5-2.1-3.6
27
18
0.033
0.6-1.2-2.1
18
17
0.050
0.9-1.5-2.4
21
17
0.076
1.2-1.8-3.0
26
20
0.101
1.5-2.1-3.3
29
28
0.132
1.8-2.4-3.9
31
24
0.037
0.9-1.2-2.1
22
22
0.057
0.9-1.5-2.7
25
22
0.085
1.2-2.1-3.0
30
25
0.113
1.5-2.4-3.6
32
35
0.149
1.8-2.7-4.2
35
29
0.042
0.9-1.526
27
0.064
1.2-1.8-2.7
29
27
0.094
1.5-2.1-3.3
33
31
0.127
1.8-2.7-3.9
36
44
0.165
2.1-3.0-4.5
38
42
0.050
1.2-1.5-2.4
31
39
0.076
1.5-2.1-3.0
34
38.
0.111
1.8-2.4-3.6
38
45
0.151
2.1-3.0-4.2
41
62
0.198
2.4-3.3-4.8
45
57
0.057
1.2-12.1-2.7
36
53
0.087
1.5-2.4-3.3
38
52
0.130
2.1-2.7-3.9
43
61
0.177
2.4-3.3-4.5
46
84
0.231
3.0-3.6-5.1
49
74
0.066
1.5-2.1-2.7
41
69
0.104
0.6-2.4-3.6
44
68
0.149
2.4-3.0-4.2
48
80
0.203
2.7-3.3-4.8
51
110
0.264
3.3-3.9-5.7
54
600 x 600 Ceiling Opening or Module
Ceiling
Duct DIA opening or
module
600
200 mm
x
600
250 mm
600
x
600
300 mm
600
x
600
350 mm
600
x
600
375 mm
600
x
600
NC30
NC40
Neck Velocity, m/s
2.04
2.55
3.06
3.57
4.08
4.59
5.10
6.12
7.14
8.16
Vel. Press., Pa
2
4
6
8
10
13
16
22
30
40
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
Total Pressure, Pa
Flow Rate, m3/s
Radius of Diff., m
NC
4
0.066
0.6-0.9-1.5
4
0.104
0.6-0.9-2.1
5
0.149
0.9-1.2-2.4
6
0.201
1.2-1.5-3.0
10
0.099
0.6-1.2-2.1
12
10
0.156
0.9-1.5-2.7
16
12
0.222
1.2-1.8-3.3
19
13.9
0.300
1.5-2.1-3.9
23
14.5
0.347
1.5-2.4-4.2
24
13
0.116
0.9-1.2-2.4
17
14
0.179
1.2-1.8-3.0
21
15.9
0.260
1.5-2.1-3.6
25
18.9
0.352
1.8-2.7-4.2
28
20.2
0.406
1.8-2.7-4.5
29
17
0.132
0.9-1.5-2.7
21
18
0.205
1.2-1.8-3.3
25
20.7
0.297
1.5-2.4-3.9
29
24.4
0.401
1.8-3.0-4.5
32
25.9
0.465
2.1-3.3-4.8
34
22
0.149
1.2-1.8-2.7
25
23
0.231
1.5-2.1-3.3
29
26.4
0.333
1.8-2.7-4.2
33
31.1
0.451
2.1-3.3-4.8
36
33.1
0.524
2.4-3.6-5.4
37
27
0.165
1.2-1.8-3
28
28
0.257
1.5-2.4-3.6
32
32.4
0.370
2.1-3.0-4.5
36
38.3
0.500
2.4-3.6-5.1
39
40.1
0.580
2.7-3.9-5.7
41
7
0.083
0.6-0.9-1.8
7
0.127
0.9-1.2-2.4
8
0.184
0.9-1.5-3.0
13
10
0.250
1.2-1.8-3.6
17
7
11
0.231
0.290
1.2-1.5-3.3 1.5-2.1-3.9
19
38
52
68
0.198
0.231
0.264
1.5-2.1-3.3 1.8-2.4-3.6
2.7-3.6
34
39
43
40
55
72
0.309
0.361
0.411
1.8-2.7-3.9 2.1-3.0-4.5 2.7-3.3-4.8
38
43
47
46.3
62.7
82.4
0.444
0.519
0.592
2.4-3.3-4.8 2.7-3.6-5.1 3.3-3.9-5.7
42
47
51
54.8
74.4
97.6
0.599
0.703
0.800
3.0-3.9-5.7 3.3-4.2-6.0 3.6-4.5-6.6
45
50
54
58.3
78.9
103
0.694
0.812
0.930
3.3-4.2-6.0 3.6-4.8-6.6 3.9-4.8-6.9
46
51
56
D38
Diffusers
NC20
Size