EN
1205. 6755517_02
9
6. DESCRIPTION OF COMPONENTS
6.1. CHILLER CIRCUIT
SCROLL COMPRESSORS
High efciency scroll-type hermetic com-
pressors, assembled on elastic antivibration
supports, driven by a 2-pole electric motor
with internal thermal protection. of the
electric heater casing included as standard.
The heater is automatically powered when
the unit stops, provided that the unit is kept
under tension.
WATER SIDE HEAT EXCHANGER
Of the plate-type (AISI 316), externally in-
sulated with closed cell material to reduce
thermal dispersion. Fitted, as standard, with
antifreeze heater.
6.1.1. WATER FEATURES
PH 6-8
Electric
less than 50 ppm
less than 50 ppm
less than 0.3 ppm
less than 50 ppm
less than 50 ppm
none
none
less than 30 ppm
SOURCE SIDE HEAT EXCHANGER
Made with copper pipes and aluminium louve-
red fins blocked by mechanical expansion of
the pipes. Provided with protective grid.
DEHYDRATOR FILTER
Hermetic-mechanical with cartridges made
of ceramic and hygroscopic material, able to
withhold impurities and any traces of humidity
present in the cooling circuit.
ONE WAY VALVES
Allow one-way flow of the fluid.
THERMOSTATIC VALVE
The mechanical valve, with external equaliser
positioned at the evaporator inlet, modulates
the flow of gas to the evaporator, according
to the heat load, in order to ensure a correct
heating level of the intake gas.
SOLENOID VALVE
The valve closes when the compressor turns off,
preventing the flow of refrigerant gas towards
the evaporator.
INDICATOR FOR LIQUID PASSAGE WITH
HUMIDITY PRESENCE SIGNAL
Used to check the refrigerant gas load and the
eventual presence of humidity in the cooling
circuit.
Inverts the flow of refrigerant gas.
Allows the passage of the refrigerant in just
one direction.
Compensates the difference in volume betwe-
en louveres coil and plate exchanger, withhol-
ding excess liquid.
6.2. FRAME AND FANS
SUPPORT FRAME
Load-bearing structure Made of hot-galvanised
steel sheet of a suitable thickness, varnished
with polyester
powders able to resist atmospheric agents over
time.
VENTILATION UNIT
Axial fan, balanced statically and dynamically.
The electric fans are protected electrically by
magnet-circuit breakers and mechanically by
anti-intrusion metal grids, according to the IEC
EN 60335-2-40 Standard.
6.3. HYDRAULIC CIRCUIT STANDARD
COMPONENTS
WATER FILTER
Equipped with steel filtering mesh; prevents
the heat exchangers from clogging.
It is indispensable in order to prevent serious
damage to the plate exchanger.
DIFFERENTIAL PRESSURE SWITCH
It checks that here is water circulation inside
the heat exchangers. Adversary, it blocks the
unit.
SAFETY VALVE
Equipped with a piped discharger and interve-
nes by discharges the over pressure in case of
anomalous pressures.
AIR VENT
Assembled on the upper part of the hydraulic
system; it releases any air bubbles that may be
present in the system.
6.4. HYDRAULIC COMPONENTS FOR
CONFIGURABLE VERSIONS
CIRCULATION PUMP
Depending on the characteristics of the pump
chosen, it offers a useful head to overcome the
pressure drops in the system.
With nitrogen pre-load membrane.
SAFETY VALVE
Equipped with a piped discharger and interve-
nes by discharges the over pressure in case of
anomalous pressures.
In order to reduce the thermal dispersion and
eliminate the phenomenon of the formation of
condensation, it is insulated with polyurethane
material of a suitable thickness.
It is required to reduce the number of peaks of
the compressor and to even the temperature
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