Sound levels (EN)
Acoustic Treatment: extremely low noise (EN)
Size
Sound power level (dB)
Sound
power
level
Sound
pressure
level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
352 83 84 85 80 72 69 60 55 81 63
402 82 83 84 80 74 70 62 57 81 63
432 82 83 86 81 75 71 62 56 82 65
452 83 83 85 82 76 70 63 57 83 65
502 81 83 86 82 75 70 62 55 83 65
552 82 83 87 83 77 72 64 58 84 66
602 82 83 86 83 78 71 64 57 84 66
702 85 85 88 85 79 73 65 59 86 67
802 84 85 88 85 79 73 65 59 86 67
Sound levels refer to full load units, in test nominal conditions. The sound pressure level refers to 1 m. from the unit outer surface operating in open eld.
Measures according to UNI EN ISO 9614-2 regulations, with respect to the EUROVENT 8/1 certication.
Data referred to the following conditions:
internal exchanger water = 12/7°C
outdoor air temperature 35°C
The indicated sound levels are only valid within the operating eld of the unit in the “Supersilenced EN” conguration; with fresh air temperatures which are higher and in any case within the operating eld of the “Soundproofed
Compressors SC” conguration bearing in mind the sound levels of the unit in the “Soundproofed Compressors SC” conguration.
Internal exchanger pressure drops
To the internal exchanger pressure drops must be added the pressure drops of the mechanical steel mesh strainer that must be placed on the water input line. It is a
device compulsory for the correct unit operation, and it is available as Clivet option. (See the HYDRONIC ASSEMBLY ACCESSORIES). If the mechanical strainer is selected
and installed by the Customer, it is forbidden the use of lters with the mesh pitch higher than 1,6 mm, because they can cause a bad unit operation and also its serious
damaging.
Admissible water ow rates
Min. (Qmin) and max. (Qmax) water ow-rates admissibles for the correct unit operation.
Size
352 402 432 452 502 552 602 702 802
Qmin [l/s] 2,3 2,6 2,9 3,2 3,6 3,9 4,4 4,9 5,5
Qmax [l/s] 6,6 7,4 8,1 9,0 10,2 11,1 12,2 13,5 15,1
The pressure drops on the water side are calculated by
considering an average water temperature at 7°℃
Q = water ow rate (l/s)
DP = pressure drop [kPa]
The water ow rate must be calculated with the following
formula
Q [l/s] = kWf / (4,186 x DT)
kWf = Cooling capacity in kW
DT = Temperature dierence between inlet / outlet water