Airpress COMBI DRY BASIC 3, Руководство по эксплуатации

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ENGLISH
42 - Edition 04/2003 Cod. 2200772300 00 -
3.0 OPERATION
3.1 OPERATION FOR COMPRESSOR
The electric motor and the compressor unit are coupled by means of a belt transmission.
The compressor unit takes in the outside air through the suction valve. The intake air is filtered by the filter cartridge fitted
upstream from the intake valve.
Inside the compressor unit, the air and the lubricating oil are compressed and sent to the
oil separating tank where the oil is separated from the compressed air; the air is then filtered again by the oil separating
cartridge to reduce the amount of suspended oil particles to a minimum. The machine is fitted with a suitable air-cooling
system.
The machine is protected by a special safety thermostat: if the oil temperature reaches 105 ÷ 110 °C the machine cuts
out automatically.
3.2 OPERATION FOR DRYER
At the moment of use the air flows from the tank to the drier and is then dried and sent to the distribution network. Dryer
operation is described below.
The gaseous refrigerant coming from the evaporator (4) is sucked by the refrigeration compressor (1) and it is pumped
into the condenser (2). This one allows its condensation, eventually with the help of the fan (3); the condensed refrigerant
passes through the dewatering filter (8) and it expands through the capillary tube (7) and goes back to the evaporator
where it produces the refrigerating effect.
Due to the heat exchange with the compressed air which passes through the evaporator against the stream, the
refrigerant evaporates and goes back to the compressor for a new cycle.
The circuit is equipped with a bypass system for the refrigerant; this intervenes to adjust the available refrigerating
capacity to the actual cooling load.
This is achieved by injecting hot gas under the control of the valve (9): this valve keeps constant the pressure of the
refrigerant in the evaporator and therefore also the dew point never decreases below 0 °C in order to prevent the
condensate from freezing inside the evaporator.
The drier runs completely automatically; it is calibrated in the factory for a dew point of + 3 °C and therefore no further
calibrations are required.
DRYER FLOW DIAGRAM
4.0 GENERAL SAFETY STANDARDS
The appliance may be used only by specially trained and authorized personnel.
Any tampering with the machine or alterations not approved beforehand by the Manufacturer relieve the latter of
responsibility for any damage resulting from the above actions.
The removal of or tampering with the safety devices constitutes a violation of the European Standards on safety.
ATTENTION: UPSTREAM OF THE MACHINE INSTALLAN ISOLATOR KNIFE-SWITCH WITH AN AUTOMATIC
CUTOUT AGAINST CURRENT SURGES AND EQUIPPED WITH A DIFFERENTIAL DEVICE FOR CALIBRATIONS
SEE WIRING DIAGRAM ON LAST PAGE
ALL WORK ON THE ELECTRIC PLANT, HOWERE SLIGHT, MUST BE CARRIED OUT BY PROFRESSIONALLY
SKILLED PERSONEL.
AIR OUTLET
AIR INLET
CONDENSATE
DRAIN