Marstair 526 HL Series, Technical Manual, Page: 5 / 31

-5-
AIRFLOWS HL/HLR UNITS
Minimum Medium Maximum
HL/HLR CFM m
3
/s CFM m
3
/s CFM m
3
/s
380 805 0.38 1000 0.47 1145 0.54
460 850 0.40 1100 0.52 1400 0.66
540 1000 0.47 1290 0.61 1650 0.78
AIRFLOWS OUTDOOR UNITS
MIN Speed MAX Speed
Model CFM m
3
/s CFM m
3
/s
MCU(+) 90 --
1440 0.68 2420 1.14
MCU(+) 100 MHPUE 90 1440 0.68 2420 1.14
MCU(+) 130 MHPUE 100 2840 1.34 3690 1.74
MCU(+) 165 MHPUE 130
2840 1.34 3690 1.74
SOUND PRESSURE LEVELS HL/HLR UNITS
Sound Pressure Levels
MODEL Speed dBA NC
380
Min 50 42
Med 53 47
Max 57 51
460
Min
47 41
Med 53 47
Max 59 53
540
Min
48 42
Med 53 48
Max 59 53
Sound Pressure Levels are dB relative to 2 x 10
-5
N/m
2
and are calculated from the results under anechoic conditions and are
quoted as an average of all points on a hemisphere of a radius of 3m away from the centre of the unit.
SOUND POWER and SOUND PRESSURE LEVELS
550/551 SERIES MCU, MCU+ and MHPUE
MAXIMUM SPEED
SOUND POWER LEVELS
SOUND PRESSURE
LEVELS
Frequency Hz
MCU(+) MHPUE Compressor 125 250 500 1K 2K 4K dBA dBA NC
90 90 Scroll 81.8 71.8 69.2 68.6 63.1 57.4 72.8 52.3 47
100 -- Scroll 79.4 73.7 71.5 68.5 63.8 58.1 73.4 52.9 47
-- 100 Scroll 79.0 69.7 68.6 65.9 61.2 55.2 71.0 50.5 44
130 130 Scroll 73.0 70.3 70.0 68.8 65.0 56.7 72.6 52.1 47
165 -- Scroll 73.1 70.3 70.1 68.9 65.5 57.5 73.1 57.2 51
MINIMUM SPEED
SOUND POWER LEVELS
SOUND PRESSURE
LEVELS
Frequency Hz
MCU(+) MHPUE Compressor 125 250 500 1K 2K 4K dBA dBA NC
90 90
Scroll 79.0 65.4 64.9 61.5 58.5 53.7 67.6 47.1 40
100 -- Scroll 75.3 69.4 70.9 63.7 59.7 53.6 70.4 49.9 46
-- 100 Scroll 67.1 67.9 65.0 61.2 56.3 51.0 66.9 46.4 40
130 130 Scroll 65.4 66.7 68.1 66.1 63.1 53.0 70.0 49.5 44
165 -- Scroll 65.5 66.9 67.3 65.1 64.2 54.0 72.6 52.6 47
Sound Power Levels were obtained in full accordance with the direct method of ISO 3741: 1988. Quantities are shown in dB with
a standard reference of 1 pW.
Sound Pressure Levels are dB relative to 2 x 10
-5
N/m
2
and are calculated from the results under free field conditions and are quoted
as an average of all points on a sphere of a radius of 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).