RG66004088 - Rev 00
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MXE
2
CONSTRUCTIVE FEATURES
STRUCTURE
Painted galvanised sheet steel structure (RAL9002) for an attractive look and
effective resistance to corrosive agents.
Fastening devices are made of non-oxidizable materials, or carbon steel that
has undergone surface-passivating treatments.
The compressor compartment is completely sealed and may be accessed on
3 sides thanks to easy-to-remove panels that greatly simplify maintenance
and/or inspection.
Sound insulation, available on request, can further reduce the noise emissions
of the unit.
CUSTOMISED HYDRAULIC KIT
-
High head pump made entirely of stainless steel, already configured for
use with mixtures of water and ethylene glycol up to 35% and provided
with internal thermal protection.
It is housed in the compressor compartment and is easy to reach thanks
to the removable perimeter panels.
-
Expansion tank.
-
Safety valve.
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Filling cock (included).
-
Automatic vent valve.
-
Water differential pressure switch and outlet water temperature probe with
anti-freeze thermostat function.
-
Mechanical Y filter supplied as a standard feature on all models to protect
the evaporator (included).
-
Buffer tank available on request.
COOLING CIRCUIT
-
Scroll-type compressor housed in a compartment that can be sound
insulated.
-
Brazed plate heat exchangers made of STAINLESS STEEL and optimised
for use with R410A.
-
Finned block condenser with 8 mm copper piping and aluminium fins,
characterised by ample heat exchange surfaces.
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Dehydrating filter.
-
Flow indicator with humidity indicator.
-
Electronically controlled electric thermostatic valve with dedicated driver
which controls opening according to the refrigerant pressure and
temperature downstream from the evaporator.
-
Reverse cycle valve
-
Single-acting valves.
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Liquid receiver.
-
High and low pressure switches.
-
Safety valve.
-
Schrader valves for checks and/or maintenance.
-
Refrigerant pressure gauges (optional)
FAN DRIVE ASSEMBLY
Electric fan with 6-pole external rotor motor directly keyed to the axial fan, with
internal thermal protection on the windings, complete with safety grille and
dedicated supporting structure.
The fan is housed in a special compartment having a profile designed to
optimise ventilation.
The use of finned block heat exchangers with 8mm diameter pipes reduces
pressure drops on the air side, thus significantly improving the noise levels of
the units.
The condensation control system continuously and automatically regulates
the fan speed, further limiting the noise emissions of the unit during nighttime
operation and under partial load conditions.
FINNED BLOCK HEAT EXCHANGER
Made of 8mm diameter copper pipes and aluminium fins, generously sized.
The special engineering of the heat exchangers allows defrost cycles to be
carried out at maximum speed in the models with heat pump operation, which
brings clear benefits in terms of the integrated efficiency of the whole cycle.
ELECTRONIC MICROPROCESSOR CONTROL
The electronic control enables the complete control of the MXE unit. It can be
easily accessed through a
polycarbonate flap with IP65 protection
rating.
The self-adaptive logic enables the unit
to operate even in systems where the
water content is low, without the use
of an inertial water storage reservoir.
By reading the outdoor air temperatu-
re, it can automatically change the setpoint to adapt it to the outdoor load
conditions or keep the unit running even in the harshest winter conditions.
The basic controller comes complete with the MODBUS protocol and enables
an immediate connection to ERGO networks.
Main functions
-
Control over the temperature of water entering the evaporator.
-
Defrosting management
-
Control of fan speed
-
Complete alarm management.
-
Dynamic control of the setpoint according to the outdoor air temperatu-
re.
-
Can be connected to an RS485 serial line for supervisory / teleassistance
operation;
-
Option of connecting a remote terminal that duplicates the control
functions.
Devices controlled:
-
Compressor
-
Fans
-
Reverse cycle valve
-
Water circulation pump.
-
Antifreeze heating elements
-
Alarm signalling relay
On request, it is possible to install the advanced controller whose functions
extend to :
-
LAN networks
-
Smart Defrost System
ELECTRIC CONTROL BOARD
The electric control board is constructed and wired in accordance with EEC
Directive 73/23, Directive 89/336 on electromagnetic compatibility and related
standards. Made of steel sheet, it is also protected by the enclosing panels of
the machine.
OPTIONS
Incorporable buffer tank
Low noise execution
Refrigerant pressure gauges
Antifreeze heating elements on the tank
Heat recovery 25% (chiller)
Special exchangers (hydrophilic treatment, copper-copper, cataphoresis, anti-
corrosion)
ACCESSORIES AVAILABLE
Remote control boards
Base vibration dampers
Metal grilles to protect exchangers