INSPY. 1003. 4138305_03
10
4. COMPONENTS DESCRIPTION
4.1. CHILLER CIRCUIT
Compressor/s
Semi hermetic high-efficiency screw com-
pressors, with a cooling capacity regulation
by means of continuous modulation from
40 to 100% (from 25 to 100% with electronic
valve) and fitted with:
− Thermal motor protection
− Oil discharge temperature check
− Electric heater for the heating of the oil
casing with the compressor at a stand-
still
− Reset button.
Water side heat exchanger
Pipe bundle exchanger of the direct expan-
sion type, suitably scaled to get high level
performances.
Steel housing with closed cell foam elas-
tomer anticondensation mattress.
The pipe bundle is made with copper tubes,
with a special profile that allows high heat
exchange together with efficient drainage.
If so requested, the exchanger can be
fitted with an anti-freeze electrical heating
element, (ACCESSORY ONLY TO BE FITTED
IN THE FACTORY), that keeps the exchanger
from outside temperatures up to -10°C, for
the purpose of avoiding the formation of
ice in standby mode.
With the unit working, protection is assured
by the outlet water temperature probe
.
Filter drier
Of the mechanical type with cartridges,
made of ceramics and hygroscopic mate-
rial able to trap impurities and any traces of
humidity in the chiller circuit.
Sight glass
For checking the refrigerating gas load and
any humidity in the refrigerating circuit.
Thermostatic valve
In standard version, NS fi ts the thermostatic
mechanical valve, with external equaliser
on the evaporator outlet, modulates the
gas fl ow to the evaporator according
to the thermal load, in such a way as to
ensure the proper degree of overheating of
the intake gas.
- Electronic thermostatic valve
As a confi guration option, it is possible to
have the electronic thermostatic valve
for the standard models NS5002-5202-
5402-5702.
Taps
Present in the liquid and discharge lines,
and allow to intercept the refrigerant in
case of extraordinary maintenance.
Solenoid valve
The valve closes when the compressor turns
off, preventing the fl ow of refrigerant gas
towards the evaporator.
Desuperheater (plate heat, optional)
(1 per parallel circuit)
Of the plate type (AISI 316), externally insu-
lated with closed cell material to reduce
thermal dispersion.
Total recover (plate heat, optional)
Of the plate type (AISI 316), externally insu-
lated with closed cell material to reduce
thermal dispersion.
4.2. FRAME AND FANS
Fan unit
Helical form with protection class IP54,
statically and dynamically balanced. The
electric fans are protected electrically with
thermomagnetic switches and mechanical-
ly with metal anti-intrusion grilles, in accord-
ance with the standard CEI EN 60335-2-40.
Load-bearing structure
Made of hot-galvanised steel sheet of a
suitable thickness, varnished with polyester
powders able to resist atmospheric agents
The available models can be:
1. Single module - single circuit
1251, 1401, 1601, 1801,
2101, 2401
2. Single module - two circuits
1402, 1602, 1802, 2002,
2202, 2352, 2502, 2652,
2802,
3. Double module - two
circuits
3002, 3202,3402, 3602,
3902,4202,4502, 4802,
5002, 5202, 5402, 5702
4. Triple module - three circuits
6003, 6303, 6603, 6903,
7203
WARNING THE HIGH EFFICIENCY
TRIPLE MODULES «A-E» ARE SENT
SEPARATELY
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