NEXT MTR......DW.....R407C.....7,0 ÷ 15,4 kW

MAIN FEATURES
Precision air conditioner for metrology labs.
10 models available, 2 versions for a wide selection opportunity.
Available in two versions: for matching with remote air cooled condenser
(DX) or with built-in water cooled condenser (DW)
On/off scroll compressors
Single refrigerant circuit.
R407C refrigerant charge.
EC plug fans.
Steam humidifier.
Dehumidification system with automatic air flow reduction.
3 working steps electric heater.
Upflow air delivery, Over version.
Suitable for indoor installation
DX version:
EER up to 3,92.
DW version:
EER up to 5,30
Built in water cooled condenser..

INDOOR INSTALLATION
The machines are designed for indoor installation.

WORKING RANGE
The machines are designed to maintain a room temperature between 20 and 26 °C (±0.5°C) with a relative humidity between 45 and 55% RH (± 3%).
The room has to be closed and with a good thermal insulation as clean rooms, metrology labs, etc.
it is possible to extend the operating range from a minimum of 16°C up to a maximum of 32°C with relative humidity from 40 to 60% RH.
CAUTION:
in these operating conditions precision and accuracy of the control are reduced:
Temperature: ± 1°C
Humidity: ± 5%rH.

MAIN BENEFITS
Wide selection opportunity.
High precision in maintaining the characteristics of temperature-humidity of the air conditioned room.
Humidifier, De-Humidifier, Electric heater supplied as standard.
High EER.
High efficiency at partial load.
Complete set of optional accessories: filters, plenum, panels, stand.
Easily of maintenance.

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.
Colour: RAL 9005 for base and frame
Similar to RAL7015 for panels, with hammered finish
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 .

COMPRESSORS
Orbiting spiral (SCROLL) hermetic compressors with spiral profile optimized for R407C refrigerant.
Continuous control of the cooling capacity by hot gas by-pass.
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
Washable air filters with G4 efficiency, with cells in synthetic fibre and metallic frame (EN 779-2002).

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.
Cooling capacity control.
Frame in galvanized steel.
Condensate tray in peraluman with PVC flexible discharge pipe.

HEATING SECTION
3 working steps electric heater consisting of aluminium armoured elements with integral fins and safety thermostat (binary control logic).

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.
Safety valve.
Liquid receiver with accessories.
3-way modulating valve for hot gas re-heating system.
Check valve for hot gas re-heating system.
Hot gas injection valve for capacity control.
Balancing valve for hot gas capacity control.
Refrigerant circuit with copper tubing with anticondensate insulation of the
suction line.
Plastic capillary hoses for pressure sensors connection.
R407C refrigerant charge.
NEXT MTR DX:
valves on gas delivery and liquid return for coupling to remote air cooled
condenser.
0÷10V proportional signal to manage the condensing control system of the remote air cooled condenser.
NEXT MTR DW:
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.

ELECTRICAL PANEL
In accordance with EN60204-1 norms complete with:
Main switch with door lock safety.
Magnetothermic switch for supply fan, compressor, electric heaters and humidifier.
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: 400/3/50.

Modulating type hot gas reheating system. CONTROL SYSTEM
MP.COM microprocessor system with graphic display for control and

HUMIDIFICATION SECTION
Proportional controlled steam humidifier with immersed electrodes fitted with safety and running accessories.

DEHUMIDIFICATION SECTION
Dehumidification system with automatic air flow reduction.

FANS SECTION
Centrifugal fans with backward curved blades, single suction and without scroll housings (Plug-fans), directly coupled to external rotor electric motor. 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.
Temperature/humidity sensors on air intake.

monitor of operating and alarms status. The system includes:
voltage free contact for remote general alarm.
Main components hour-meter.
Nonvolatile “Flash” memory for data storage.
Menu with protection password.
LAN connection.

TO BE MATCHED WITH REMOTE CONDENSER
The DX units are designed to be matched with remote condensers with axial
fans (TEAM MATE series) or plug-fans (TEAM MATE PF series).