28
17
CHARACTERISTIC CURVE OF THE CONTROL VALVE FOR UNIT IN PARALLEL
If the hydronic configuration (CI) is installed on the unit with the variant "external pump in parallel" (2), the head losses of the
ON/OFF motorized valve should be added to those reported in the curves of Paragraph 17.
For example: for the model HP_OWER 250N with nominal water flow 1,01L/s, we obtaine 1,4kPa (valve head loss) + 30kPa
(hydronic circuit head loss)=34,9 kPa (total internal head loss).
18
ACCESSORIES TO REDUCE THE NOISE LEVEL
18.1
LN Cod. 00264036/00264037
The silenced unit (with LN accessory) is provided with innovating thermo-acoustic shells on compressors. These shells allow a
noise reduction up to 10% at specific compressor rotation frequencies. The special multi-layer structure generates a thermal
insulation which reduces, at very low outside temperatures, the heat losses of 2% compared to a standard insulation.
18.2
SSL Cod. 00264038
The super silenced unit (with SLN accessory) is provided not only with the thermo-acoustic shells on compressors but also with a
special diffuser installed on the fan. The diffuser structure improves the air flow efficiency and allows a fan speed reduction,
lowering the acoustic pressure by up to 7,2 dB(A) and energy consumption by up to 27% with unchanged airflow. That could lead
to a saving up of a lot of money in energy costs per fan per year. Alternatively, you could make use of the greater efficiency to
boost air performance by up to 9% with comparable energy consumption.
For more details about the power sound, you can see the technical data listed in paragraph 13.3.
in KW
1
2
1,5
2,5
-27%
in dB(A)
75
70
80
85
90
-7,2 dB(A)
AxiTop Diffuser
Less energy consumption at
constant air volume
Reduced noise at equal at
constant volume
