CLIMAVENETA i-ACCURATE i-AX Installation Manual - User And Maintenance page 8

Version i-AT (water-cooled)
The i-AT series units use water as the cooling fluid, therefore
each refrigerant circuit is combined with a plate heat exchanger
installed on the unit, suitably sized to ensure minimum water side
pressure drop and consequently reduce the power consumption
of the water pump.
Remember that the units are supplied without the system circu-
lating pump.
Water-cooled condenser
Each unit is fitted with one (single-circuit units) or two (two-cir-
cuit units) braze welded stainless steel plate condensers.
The units for applications with well water are supplied with a
pressure control valve for managing the condensing pressure.
The units generally work in closed circuits, with outdoor dry
coolers, cooled by the outside air.
To avoid ice formation, it's recommended to always use a glycol
mixture as the fluid inside the closed circuit, in the percentages
described in this manual according to the average minimum tem-
perature reached in the installation site in winter.
The BDC (axial-flow fans with asynchronous motor) and i-BDC
Dry Coolers (axial-flow fans with EC motor) are supplied as
standard accessories.
The antifreeze and fluid circulating pump are generally supplied by
other manufacturers.
For "open" circuits mechanical filters must be used to trap impu-
rities and prevent blockage of the braze-welded plate heat
exchanger.
To reduce energy consumption (pump), it's suggested to use a
valve to close the circuit when the indoor unit is off.
Water circuit
The unit is fitted with a modulating 3-way valve to control the
flow of cooling fluid to the indoor heat exchanger and maintain
the desired conditions.
Remember that the units are supplied without the system circu-
lating pump.
i-AT - water cooled
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