NEXT DW...... R410A ..... 6,9 ÷ 108,0 kW

MAIN FEATURES
Precision air conditioner.
44 models available, 2 versions for a wide selection opportunity.
EER up to 4,89.
On/off scroll compressors.
Single and double refrigerant circuit.
Built in water cooled condenser.
R410A Refrigerant charge.
EC plug-fans (size H0, H1, H2, H3).
AC plug-fans (size H4, H5, H6, H7).
ovER and UNDER versions.
Suitable for indoor installation.

MAIN BENEFITS
Units with single and double refrigerant circuits.
High EER.
High efficiency at partial load.
Availability of electric heater.
Availability of steam humidifier.
Availability of hot water heating coil.
Availability of extra circuit heating coil.
Availability of indirect Free Cooling system.
Complete set of optional accessories: filters, plenum, panels, stand.
Easily of maintenance.

INDOOR INSTALLATION
The machines are designed for indoor installation.

WORKING LIMITS
Room air temperature:
14”C minimum temperature with wet bulb.
24”C maximum temperature with wet bulb. 35”C maximum temperature with dry bulb.

Room air humidity:
20%RH minimum relative humidity. 75%RH maximum relative humidity.

Water cooled condenser: Water temperature:
30/50°C Outlet temperature range.

MAIN COMPONENTS
FRAMEWORK
Base in aluminium extrusion, painted with epoxy powders.
Inner frame and upper frame in aluminium profile, painted with epoxy
powders. The inner frame is provided with seals to ensure air tight with the panels.
Galvanized steel sheet panels externally coated with PVC film and internally insulated with noise absorption material.
The panels are fixed to the frame with non visible mounting system.
Electric board in separate technical compartment on the machine front (Size H0, H1, H2, H3).
Separate technical compartment on machine front for electric board,
refrigerant and hydraulic connections and control and regulation devices (size H4, H5, H6, H7)
Colour: RAL 9005 for base and frame
Similar to RAL7015 for panels, with hammered finish
OVER version
Air intake from the front through honeycomb type grille and air delivery from the top.
Washable air pre-filters with G2 efficiency, with cells in synthetic fibre
(size H0 excluded).
UNDER version Machine size H0
Air intake from the front through honeycomb type grille and air delivery from the bottom.
Machine size H1, H2, H3, H4, H5, H6, H7
Air intake from the top and air delivery from the bottom.

FANS SECTION
Centrifugal fans with backward curved blades, single suction and without scroll housings (Plug-fans), directly coupled to external rotor electric motor.
Size H0, H1, H2, H3:
Brushless type synchronous EC motor with integrated electronic commutated system and continuous variation of the rotation speed. The motor rotation control is obtained with the EC system (Electronic Commutation) that manage the motor according to the 0÷10V proportional signal coming from the microprocessor control.
Size H4, H5, H6, H7:
Fans fed through an autotransformer that allows the manual selection of 7 rotation speed.
Temperature sensors on air intake.
Fan guard with rubber support (UNDER version)

REFRIGERANT CIRCUIT
Components for each refrigerant circuit:
Thermostatic expansion valve.
Sight glass.
Filter dryer on liquid line.
Pressure transducers with indication, control and protection functions, on low and high refrigerant pressure.
High pressure safety switch with manual reset.
Liquid receiver with accessories.
Refrigerant circuit with copper tubing with anticondensate insulation of the
suction line.
Plastic capillary hoses for pressure sensors connection.
R410A refrigerant charge.

COMPRESSORS
Orbiting spiral (SCROLL) hermetic compressors with spiral profile optimized for R410A refrigerant.
ON / OFF capacity control (0 / 100% each compressor).
2-pole 3-phase electric motor with direct on line starting.
Crankcase heater.
Electric motor thermal protection via internal winding temperature sensors.
Terminal box with IP54 enclosure class.
Rubber supports.

FILTER SECTION
Size H0
Washable air filters with G3 efficiency, with cells in synthetic fibre and metallic frame (EN 779-2002).
Size H1, H2, H3, H4, H5, H6, H7
Washable air filters with G4 efficiency, with cells in synthetic fibre and

ELECTRICAL PANEL
In accordance with EN60204-1 norms complete with:
Main switch with door lock safety.
Magnetothermic switch for each compressor.
Magnetothermic switches for fans.
Contactors for each load.
The supply fans equipped with EC electric motor are not supplied with contactors.
Transformer for auxiliary circuit and microprocessor supply.
Panel with machine controls.
Power supply:
230/1/50 for model 006 P1 S H0.
400/3/50 for the other models.

metallic frame (EN 779-2002). CONTROL SYSTEM
MP.COM microprocessor system with graphic display for control and
monitor of operating and alarms status. The system includes:

EVAPORATING SECTION
Heat exchanger coil with internally corrugated copper tubes and high efficiency aluminium fins, specifically developed to provide high hea transfer and lower pressure drops.
With single refrigerant circuit for S version machines.
With double refrigerant circuit for DC version machines.
Frame in galvanized steel.
Condensate tray in peraluman with PVC flexible discharge pipe.

CONDENSING SECTION
Copper brazed plate type with cover plates, plates and connections in AISI
316 stainless steel.
0÷10V proportional signal to manage the condensing control system of the 2-way motorized valve. The valve is an optional accessory.

voltage free contact for remote general alarm.
Main components hour-meter.
Nonvolatile “Flash” memory for data storage.
Menu with protection password.
LAN connection.