M02
J40
M6-
04
WDAT-3
2.160-3.660
- G E N E R AL I N F O R M AT I O N
-
5
STANDARD UNIT SPECIFICATIONS
COMPRESSOR
Compact semi hermetic helicoidal twin screw compressors: the main screw (male, with five lobes) is driven directly by
the electric motor, while the secondary screw (female with six vanes) is driven by the primary one.
The intrinsic volumetric ratio is precisely planed to be applied in the field of air-conditioning with ecological refrigerant R-
134a. The screws are made from steel alloy and the axial bearings are in tandem configuration for greater sturdiness.
The seal is guaranteed by extremely accurate tolerances in the machining of all moving parts and by the specific
circulation of oil between the screws. Continuous modulation of cooling capacity (Stepless) with oilcontrol dynamic.
The free flow lubrication system resulting from pressure differences, is equipped with a highly efficient separator, level
indicator and oil filter (replaceable). An oil heater prevents excessive dilution of the oil by the refrigerant, and is
automatically activated at all stages where the compressor is switched off. The asynchronous three-phase two pole
motor is suction gas cooled, reduced load start of the star delta type or Part Winding (according the compressor’s size)
Fully protected electronic module, with safety sensor for monitoring discharge temperature, sensors for monitoring
maximum temperature of the windings, device to monitor the motor rotation direction and device to monitor absence of
phase. Incorporated silencer non return valve and shut-off valve on the compressor discharge.
Filter on the suction line, at the inlet to the compressor.
Automatic internal saftey valve between HP & LP.
STRUCTURE
The bearing structure is made from hot-galvanized and painted plate and the external panelling from pre-painted
aluminium, ensuring maximum weatherability. The uniform unit weight distribution is guaranteed by the base structure,
realized with galvanized and painted plate section bars, featuring holes and/or stirrups to simplify the unit lifting and
earthing.
INTERNAL EXCHANGER
Direct expansion exchanger with independent circuit on the refrigerant side for each compressor. The tube bundle is
removable and allows easy maintenance. The exchanger is made from a carbon steel shell. The high-efficiency tubes,
anchored to the tube plate by mechanical expansion, are made from copper, fluted to increase heat exchange and
studied to be used with the modern ecological refrigerants. In addition, complete with safety differential pressure switch
on the water side, antifreeze heater to protect against the risk of ice, and closed-cell heat insulation that prevents the
formation of condensate and heat exchange with the outside.
EXTERNAL EXCHANGER
Finned exchanger, made from copper pipes arranged in staggered rows and mechanically expanded for better
adherence to the collar of the fins. The exchangers are planned, designed and produced directly by CLIVET. The fins are
made from aluminium with a special corrugated surface, set a suitable distance apart to ensure maximum heat exchange
efficiency. The coils are complete with integral subcooling circuit which assures the correct refrigerant feeding of the
expansion valve. Available in different options as in optional list.
FAN
Helical fans with sickle-shaped blades with "Winglets" at the end, coupled directly to a three phase electric external rotor
motor with thermal protection incorporated in version IP 54. Housed in aerodynamically shaped nozzles to increase
efficiency and minimize noise levels. They are fitted with protective safety guard grilles.
REFRIGERANT CIRCUIT
The units are made with independent refrigerant circuits, each with:
- refrigerant circuit with economizer (in the extimated sizes)
- electronic expansion valve (see details further on)
- low pressure switch
- high pressure switch
- low pressure safety valve (safety valve with shut-off valve sealed with lead, open for possible inspection)
- high pressure safety valve (safety valve with shut-off valve sealed with lead, open for possible inspection)
- high and low pressure gauges
- replaceable anti-acid solid cartridge dehydrator filter
- sight glass with moisture indicator
- compressor discharge shut-off valve
- liquid line shut-off valve
Summary of Contents for WDAT-3 2.160
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