Sound Power; Sound Pressure Levels; 550/551 Series Mcu+ Mhpul Mhpue; Sound Pressure Levels - Ducted Condensing Units - Marstair CC 875 Technical Manual
Cassette split systems
Hide thumbs
Also See for CC 875:
- Installation instructions manual (13 pages) ,
- Installation instruction (6 pages)
Table of Contents
Advertisement
SOUND POWER and SOUND PRESSURE LEVELS
(speed 1 = lowest, 4 = highest:
MODEL
SPEED
125
1
56.4
2
59.1
80
3
63.4
4
66.1
1
60.6
2
63.1
110
3
66.3
4
68.8
1
64.7
2
67.1
140
3
69.2
4
71.5
Sound Power Levels were obtained in conformance with ISO 3745. Values are shown in dB with a standard reference of 1 pW.
Sound Pressure Levels are dB relative to 2 x 10
a position of 3m away from the centre line of the unit, 1m down.
550/551 SERIES MCU+ MHPUL MHPUE
MAXIMUM SPEED
MCU+
MHPUL(E)
125
60
-
72.9
80
-
70.9
-
80
75.4
90
-
81.8
100
-
79.4
-
100
79.0
130
-
73.0
150
150
73.1
MINIMUM SPEED
MCU+
MHPUL(E)
125
60
-
67.4
80
-
69.4
-
80
67.5
90
-
79.0
100
-
75.3
-
100
67.1
130
-
65.4
150
150
65.5
Sound Power Levels obtained in conformance with ISO 3741: 1988. Values are in dB with a standard reference of 1 pW.
Sound Pressure Levels are dB relative to 2 x 10
a position 3m away from the centre of the unit (in cooling mode); (add 3dBA or 3NC for units at an intersection of a wall, add 1dBA or
1NC for high level wall mounted units).
SOUND PRESSURE LEVELS - DUCTED CONDENSING UNITS
Measurement Point
3m from unit in void
Office area
3m from discharge grille
All readings taken from a typical application of a unit suspended in a ceiling void complete with 5m of insulated ducting, conditioning an
office directly below. Sound Pressure Levels are dB relative to 2x10
Tel: 01823 665660
Heronhill - for all your Marstair requirements
Range 1 = speeds 1,2,3:
SOUND POWER LEVELS
Frequency Hz
250
500
1K
2K
56.2
53.9
54.9
45.1
58.7
56.0
57.0
49.5
62.4
59.3
59.5
54.2
65.5
62.9
62.5
57.8
58.2
55.7
56.2
46.1
60.5
57.8
58.4
50.6
63.7
60.8
60.8
55.2
67.1
64.5
63.9
59.1
60.2
57.5
57.4
47.1
62.3
59.5
59.7
51.7
64.9
62.2
62.0
56.2
68.6
66.1
65.2
60.3
-5
2
N/m
and are calculated from results measured in anechoic conditions. Values relate to
SOUND POWER LEVELS
Frequency Hz
250
500
1K
2K
67.7
67.8
66.4
61.9
68.6
68.1
65.3
59.5
72.9
69.1
68.8
62.6
71.8
69.2
68.6
63.1
73.7
71.5
68.5
63.8
69.7
68.6
65.9
61.2
70.3
70.0
68.8
65.0
70.3
70.1
68.9
65.5
SOUND POWER LEVELS
Frequency Hz
250
500
1K
2K
64.3
67.1
66.8
60.7
66.5
66.9
62.1
56.1
63.4
64.4
64.2
57.4
65.4
64.9
61.5
58.5
69.4
70.9
63.7
59.7
67.9
65.0
61.2
56.3
66.7
68.1
66.1
63.1
66.9
67.3
65.1
64.2
-5
2
N/m
and are calculated from results measured in anechoic conditions Values relate to
Unit
Fan Speed
Max
DCUE 60, 80
Min
Max
DCUE 60, 80
Min
Max
DCUE 60, 80
Min
www.heronhill.co.uk
Range 2 = speeds 2, 3, 4)
SOUND PRESSURE LEVELS
4K
dBA
dBA
34.6
57
39
39.2
60
42
45.6
63
45
50.8
66
48
35.8
59
41
40.3
61
43
46.4
64
46
52.6
68
50
36.9
60
42
41.4
63
45
47.1
65
47
54.4
69
51
SOUND PRESSURE LEVELS
4K
dBA
dBA
54.1
70
50
53.8
70
49
56.6
72
52
57.4
73
52
58.1
73
53
55.2
71
51
56.7
73
52
57.5
73
57
SOUND PRESSURE LEVELS
4K
dBA
dBA
51.7
70
49
51.6
68
47
51.0
67
47
53.7
68
47
53.6
70
50
51.0
67
46
53.0
70
50
54.0
73
53
dBA
54
44
42
32
52
40
-5
2
N/m
.
11
NC
35
38
40
43
35
38
40
43
38
40
43
46
NC
45
43
47
47
47
44
47
51
NC
45
41
43
40
46
40
44
47
NC
48
31
28
17
44
28
Fax: 01823 665807
Advertisement
Table of Contents
