22.04 – 4139181_04
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22.04 – 4139181_04
11
3
UNIT COMPONENTS DESCRIPTION
REFRIGERANT CIRCUIT
Compressors
Compressori ermetici di tipo scroll ad alta efficienza (montati su supporti elastici
antivibranti), azionati da un motore elettrico a due poli con protezione termica in-
terna.
Crankcase heaters as standard, automatically activated when the unit stops, as long
as power is maintained to the unit.
Microchannel coils
The full range uses aluminium microchannel coils, ensuring very high levels of ef-
ficiency.
This allows using less refrigerant compared to traditional copper coils.
System side heat exchanger
Brazed plate heat exchanger in stainless steel. It is externally insulated with closed
cell neoprene anti-condensation material.
When the unit is not functioning, it's protected against the formation of ice by an
electric heater.
Filter drier
Hermetic-mechanical made of hygroscopic material, able to withhold impurities
and any traces of humidity present in the cooling circuit.
Mechanic thermostatic valve
The mechanical type valve, with external equaliser located at the evaporator outlet,
modulates the flow of refrigerant into the evaporator based on the load and en-
sures the correct superheat of the suction gas.
Electronic thermostatic expansion valve
Compared with a mechanical thermostatic valve, the electronic one offers better
overheating control so the evaporator is used more efficiently in all conditions,
thereby boosting machine output.
Its use in comfort dedicated applications allows to make substantial benefits espe-
cially in the presence of varying loads, because it allows you to maintain the maxi-
mum efficiency with any external air temperature.
In industrial applications, where there is often a need to make temperature changes
in a wide range of environmental conditions, the use of the electronic valve is ideal
because it avoids the need for continuous calibration, adapting the system to dif-
ferent load conditions and hence making it independent.
Sizes from 1805 ÷ 3600 come standard with the electronic thermostatic valve (X).
Solenoid valves
The valves close when the compressor switches off, blocking the flow of refrigerant
gas to the evaporator, recovery and the coil.
Only with the mechanical thermostatic valve
Sight glass
It is used to verify that the expansion system is powered correctly and the presence
of humidity in the cooling circuit.
HYDRAULIC CIRCUIT
Water filter
Equipped with steel filtering mesh, it prevents the heat-exchanger from clogging
system side due to any impurity inside the circuit.
Installed in versions with the hydronic kit, it is supplied for version 00.
Recovery side heat exchanger (optional)
Brazed plate heat exchanger in stainless steel. It is externally insulated with closed
cell neoprene anti-condensation material.
When the unit is not functioning, it's protected against the formation of ice by an
electric heater.
HYDRAULIC CIRCUIT (VERSIONS WITH HYDRONIC KIT)
Pump
They provide useful static pressure to the system, excluding the unit pressure drops.
The pumps are programmed in rotation with automatic exchange if the running
pump fails
Expansion vessel
Membrane type precharged with nitrogen.
Pressure relief valve
Calibrated at 6 Bar and drain pipe, it activates by discharging overpressure if abnor-
mal pressure occurs.
Air drain valve
Mounted at the highest level of the hydraulic system. The air vent is used for the
release of any air pockets from the hydraulic circuit.
Drain valve
System buffer tank
In steel to reduce heat gain and avoid the formation of condensation.
Insulated with polyurethane material of adequate thickness.
It reduces the number of compressor starts and stabilises the water temperature
delivered to the system.
It is equipped with antifreeze electrical resistances to ensure minimum tempe-ra-
ture of stored water of +5°, with minimum outdoor temperature of -20°C. The re-
sistance is activated by a water temperature probe placed inside the unit’s hydronic
circuit.
Available only on request the tank in stainless steel AISI 304.
STRUCTURE AND FANS
Structure
Supporting structure for outdoor installation, in hot-dipped galvanized sheet steel,
with RAL 9003 polyester powder coating.
Designed to ensure the maximum access for service and maintenance.
Standard fan unit
Equipped with accident-prevention net, it consists of axial fans and 6-pole motor
with external rotor and protection rating IP54.
Moreover, the motor is equipped with inner thermal protection with automatic
reset.
Inverter fans
Continuous modulation of revolution speed according to the condensation pres-
sure, highly efficient motor for low energy consumption.
CONTROL AND SAFETY COMPONENTS
High pressure switch
With fixed calibration, placed on the high pressure side of the cooling circuit, it in-
hibits the operation of the compressor if abnormal work pressure occurs.
Manual reset
Low pressure transducer
Placed on low pressure side of cooling circuit, it signals the work pressure to the
control board, generating a pre-warning in case abnormal pressure occurs.
High pressure transducer
Placed on the high pressure side of the cooling circuit, signals the work pressure to
control board, generating a pre-warning in case abnormal pressure occurs.
Condensation control temperature
Device for electronically controlling the condensation, for functioning even at low
temperatures, which allows adjusting the air flow rate to actual system demand
with resulting advantages in terms of consumption reduction.
Standard in the silenced versions or with the desuperheater; an accessory for all
other versions.
ELECTRICAL CONTROL AND POWER PANEL
Complete with:
— door interlocked isolator
— Magnet circuit breakers and contactors for compressors and fans
— external electrical panel
— electronic controller
— All numbered cables
