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Mitsubishi Electric t-NEXT DF DX 011 P1 S Manual page 10

Air conditioners for it cooling with dual fluid system.to be matched with remote air-cooled condenser.
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t-NEXT DF DX
T_tNEXTDFDX_0719_EN
COOLING SECTION – DIRECT EXPANSION COIL
Heat exchanger coil with internally corrugated copper tubes and high efficiency aluminium
fins, specifically developed to provide high heat transfer and lower pressure drops.
Frame in galvanized steel or peraluman.
Condensate tray in peraluman with PVC flexible discharge pipe.
Temperature sensor on air intake with control and regulation functions.
Temperature sensor on air delivery with function of temperature display.
Under floor water alarm through sensor to be placed on the floor.
COOLING SECTION – CHILLED WATER COIL
Chilled water 4 rows cooling coil with copper tubes, aluminium fins and galvanized steel
frame.
2-way motorized valve with 0÷10 VDC control actuator and emergency manual control.
Temperature probe on water inlet.
Hydraulic pipes in copper with anticondensate insulation
REFRIGERANT CIRCUIT
The air conditioner is supplied with a minimum R410A refrigerant charge.
Components for each refrigerant circuit:
Electronic expansion valve. The valve allows high performance and system efficiency thanks
to a timely and accurate response to changes in temperature and pressure.
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.
Pressure relief valve on liquid receiver for models 041 P1, 045 P1, 075 P2, 082 P2,
092 P2, 102 P2, 117 P4, 146 P4.
Refrigerant circuit with copper tubing with anticondensate insulation of the suction line.
Lubricant oil charge.
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.
Condensing control by continuous variation of remote condenser fan rotation speed for
operations with ambient temperature down to -20°C.
ELECTRICAL PANEL
In accordance with EN60204-1 norms, suitable for indoor installation, complete with:
Main switch with door lock safety on frontal panel.
Magnetothermic switches for each compressor.
Magnetothermic switches for supply fans.
Contactors for each load. The supply fans equipped with EC electric motor don't require
contactors.
Transformer for auxiliary circuit and microprocessor supply.
Numbered wirings.
Terminals:
OUTLETS
Voltage free deviating contact for General Alarm 1-2
-
Voltage free contact for supply fans status.
-
Voltage free contact for smoke / fire sensor (the sensors are accessory)
-
INLETS
External enabling.
-
Power supply 400/3+N/50.
CONTROL SYSTEM
Microprocessor control system with graphic display for control and monitor of operating and alarms
status. The system includes:
Built-in clock for alarms date and time displaying and storing;
Built-in memory for the storing of the intervened events (up to 200 events recorded);
Predisposition for additional connectivity board housing (MODBUS, LON,
BACNET MS/TP RS485, BACNET OVER IP). The electronic cards are optional accessories.
Main components hour-meter;
Non-volatile "Flash" memory for data storage in case of power supply faulty;
Menu with protection password;
Demand Limit function;
LAN connection (max 10 units).
10
MEHITS S.p.A.
DATA BOOK

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