EKOM DK50 4VR/50, Installation, Operation And Maintenance Manual

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DK50 4VR/50
NP-DK50 4VR50-11_04-2018 - 8 - 04/2018
7. FUNCTION
Compressor
(Fig.1)
The compressor (1) draws in air through a filter (8) and compresses it through a check valve (3) into an air
tank (2). The connected apparatus draws the compressed air from the air tank until the pressure drops to a
default preset level on the air-pressure switch (4) switching the compressor on. The compressor again
compresses air into the nozzle until the maximum pressure is reached and the compressor switches off.
Safety valve (5) prevents the pressure in air chamber from rising above the maximal allowed value. The
drain valve (7) releases the condensate from the air nozzle. Compressed, dry and clean air is then ready for
additional use in the air tank.
Compressor with membrane dryer (MD) (Fig. 2)
The compressor (1) draws in air through an inlet filter (8) and compresses it into a cooler (12). The air then
passes through a filter (16) and micro-filter (15) into the dryer (14) with the dry and clean air passing through
a check valve (3) to the air tank (2). Condensate from the filter and micro-filter is automatically released into
a drainage vessel. The dryer ensures continuous drying of the compressed air. Compressed, dry and clean
air is then ready for additional use in the air tank.
Compressor with NDM dryer (Fig. 3)
The compressor (1) draws in air through an inlet filter (8) and compresses it into the cooler. The air then
passes through the dryer chamber (23) containing the adsorbent media where moisture is removed and then
out via the check valve (3) and into the air tank (2). The adsorbent media regenerates when the drying
chamber is being evacuated, always after the compressor is switched off by the pressure switch. The air is
then released from the adsorption chamber via the open solenoid valve as it is evacuated using dry
compressed air. Air drying occurs in one chamber while regeneration occurs in the other chamber. The
mode of each chamber changes in regular cycles and the drying and regeneration processes are then
performed in the alternate chamber. Compressed, dry and clean air is then ready for additional use.
The pressure switch (24) protects the dryer from damage if the compressor operates for an extended period
of time at low pressure (less than 5 bar)
Compressor cabinet (Fig. 4)
The soundproof cabinet itself is compact yet allows sufficient exchange of cooling air. The fan (9) underneath
the compressor aggregate and the cabinet fans (33) cool the compressor and the space inside the cabinet.
The fans operate when the compressor motor is running. The cooling fans automatically start if the
temperature in the cabinet reaches over 40°C, even when the compressor is not running. The fans
automatically switch off once the cabinet temperature drops to around 32°C.
An indicator (34) located on the front of the cabinet indicates maintenance is needed on the compressor with
the NDM dryer unit (see the Maintenance Interval chapter)
Make sure that nothing impedes the free flow of air under and around the compressor.
Never cover the hot air outlet on the top back side of the case.
If placing the compressor on a soft floor such as carpet, create space for ventilation
between the base and floor or the box and floor, e.g. underpin the footings with hard pads.