JUN-AIR 4000 series [cabinet] - Инструкция (Страница 7)

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valve, the receiver is emptied by loosening the screw at the
end of the safety valve (fig. 19).
·
Dismount possible pneumatic equipment.
·
Switch on the compressor and check the pumping time, i.e.
how long it takes before receiver pressure reaches 8 bar.
The pressure is to be read on pressure gauge for receiver
pressure.
·
If the pumping time is longer than the time indicated in
Technical Details, switch off the compressor and find the
leaks.
·
Contact your JUN-AIR distributor if leaks cannot be
repaired.
·
If the pumping time matches the indications in Technical
Details, there are no leaks.
·
Close the cabinet door.
Important !
Always test the compressor when cold as the time
indicated refers to the pumping time of a cold
compressor. The pumping time of a warm compressor
is much longer and consequently, the result would be
misleading.
Replacement of intake filter
·
Replace the intake filter every 2000 hours.
·
Switch off the compressor on the main switch and pull out
the plug.
·
Let the compressor cool for a few minutes.
·
Open the cabinet door where the motor is placed. The
placing of the motor depends on the model.
The following is valid for compressor models 2000 and 4000:
·
Lift the rubber edge of the intake filter using a screwdriver
(fig. 20).
·
Remove the intake filter from the cylinder (fig. 21).
Please note: Model 2000 has two intake filters.
Model 4000 has four intake filters.
·
Fit the new intake filter in the cylinder with a light touch.
·
Close cabinet door.
Replacement of dryer filter elements.
Only on compressors with „D“ in the model description.
·
Filter element is to be replaced every 4000 hours or min.
once a year. If the environment is very contaminated,
intervals for changing filter element may be reduced to
between 1000 and 2000 hours.
·
Switch off the compressor on the main switch and pull out
the plug.
·
The cabinet door is opened on the side of the dryer. The
placing of the dryer depends on the size of the cabinet.
·
Open drain cock and let the pressure fall to 0 bar. The
pressure is to be read on the pressure gauge for receiver
pressure (fig. 12).
·
Close drain cock.
·
Pull the black drain tube of the rapid coupler placed under
the prefilter (fig. 23).
The following is valid for pre as well as after filter:
·
The filter bowl is disassembled by hand (clockwise) (fig. 24).
·
The old filter element is disassembled (clockwise) (fig. 25).
·
Mount new filter element by hand.
·
Place new O-ring at the top of the filter bowl (fig. 26).
·
Assemble filter bowl again (counterclockwise).
·
Mount the black drain tube on the rapid coupler under the
prefilter.
·
Close cabinet door.
For further information, please see Dryer Manual.
Test the non-return valve
·
Once a year.
·
Switch off compressor on the main switch and pull out the
plug.
·
Open cabinet door on the side of the safety valve. The
placing depends on the size of the receiver.
·
Pull the ring at the end of the safety valve (fig. 17).
Warning:
Loud noise!
·
Let pressure fall to 0 bar. The pressure is to be read on the
pressure gauge for receiver pressure (fig. 12).
·
If the compressor is mounted with a TÜV-approved safety
valve, the receiver is emptied by loosening the screw at the
end of the safety valve (fig. 19).
·
The cabinet door is opened on the side of the non-return
valve. The placing depends on the size of the receiver.
·
Dismount non-return valve from receiver (fig. 27).
·
Disassemble non-return valve and remove O-ring from
piston (fig. 28 and 29).
·
Clean non-return valve.
·
Mount new O-rings and re-assemble non-return valve (fig.
30). (Two O-rings in non-return valve)
Fault finding and repair
Important!
Switch off and isolate from electrical supply before
removing any parts from the compressor.
Empty air receiver of air before dismantling any parts
of compressor unit’s pressure system.
1. Compressor does not start (no sound):
a) No power from mains. Check fuses and plug.
b) Breakage or loose joints in electrical connections.
c) Pressure in the air receiver is too high for activation of
the pressure switch. Solenoid valve for automatic relief
of receiver is defective. To be replaced.
d) Capacitor defective.
2. Compressor does not start, makes a buzzing sound
followed by clicking noise (cannot start against high
pressure):
a) Leaky non-return valve. Remove the flexible pressure
pipe and clean to find out whether air leaks from the
valve. If so, clean or replace.
3. Compressor works, but pressure does not increase in
tank (or increases too slowly):
a) Intake filter clogged. Replace.
b) Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water. Pressure drop is not to exceed 1 bar
per hour.
c) Failure in non-return valve which is creating a flow
restriction.
d) Check the piston gaskets. Replace, if necessary.
e) Desiccant has been contaminated and/or filter elements
have been clogged (this only applies to model „D“).
Replace. See "Adsorption Dryer Manual".
Operating manual
GB