ler operation, and is necessary only
when initially programming the basic
parameters.
Microprocessor
− Multilingual
menu
− Phase sequence control
− Independent control of individual
compressors
− Ammetric transformer
− Cumulative failure block signalling
− Alarm log function
− Daily/weekly programming
− Inlet/outlet water temperature
display
− Alarm display
− Full proportional regulation of the
output water temperature
− Programmable timer function
− Interfaceability with the Modbus
protocol (accessory)
− Control and management of
pump/s rotation
− Compressor rotation control
− Analogue input from 4 to 20 mA
− “Always Working” function. In case
of critical conditions the machine
does not arrest but is able to self-
adjust itself and provide maximum
output power in those conditions
− Self adapting operating differen-
tial “Switching Histeresys” to ensure
correct compressor operation at all
times even in plants with a low wa-
ter content or insufficient flow rates.
This system reduces the compressor
wear
− The PDC “Pull Down Control” sys-
tem to prevent the activation of
the power steps when the water
temperature is approaching the
set point quickly. It optimises the op-
eration of the machine both when
running normally or when there are
load variations, thereby assuring
top machine efficiency in all situa-
tions.
For further information, refer to the user
manual.
HYDRAULIC CIRCUIT KEY
1 Condenser
2 Evaporator (plate-type exchangers)
3 Flow switch
4 Filter
5 Pump
6 Expansion tank
NB
The Victaulic joints and the soldering
studs for the condenser and evaporator
are provided
1
3
2
4
5
6
Example of NXW version [°]
10
INXWPY. 1004. 4438805_00
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