• 20 •
01
07
02
08
03
09
04
10
05
11
06
12
08
01
02
04
05
07
09
10
11
12
03
03
06
08
01
01
02
02
04
04
06
05
07
07
09
10
11
11
12
12
03
03
03
03
NAC/NAH
200 - 230 - 270 - 300
NAC 340 - 380 - 420 - 480 - 540 - 600 - 640
NAH 340 - 380 - 420 - 480
V
Q
Dt
Application Guide / NEOSYS-AGU-1801-E
HYDRAULIC DATA
UNIT WITH HYDRAULIC MODULE
Water
fi
lter (item supplied loose)
Electronic
fl
ow switch
Air purge
Plate heat exchanger
Pressure tap
Setting valve
Pump
Pressure tap and drain valve
Safety valve with manometer
Return temperature sensor
Expansion vessel
Supply temperature sensor
IN
OUT
Vmini = 86 x Q / (Nstages x Dt)
Where :
Minimum water content of the installation
Cooling capacityof the chiller
Nstage
Number of control steps available in the unit
Maximum acceptable temperature rise (Dt = 6°c for an air conditioning application)
Important note: In case NEOSYS is used in air-conditioning applications with a short water system (e.g. NEOSYS application with air
handling units) or in case NEOSYS is used for industrial process cooling, it is mandatory to use a buffer tank.
MINIMUM WATER CONTENT OF AN INSTALLATION
Thanks to multi step capacity control and smart anti-short compressor cycling, NEOSYS can work with minimum water loop volume
as de
fi
ned here below. This can eliminate the need for a buffer tank in most of air-conditioning applications (e.g. NEOSYS application
with fan-coil units).
