Jun-Air 12-25, Operating Manual

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2. Compressor operates, but pressure does not increase
in tank (or increases too slowly):
a) The cap on the intake tube has not been removed and
replaced by the intake filter (fig. 2).
b) Intake filter is clogged. Replace.
c) Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water. Pressure drop is not to exceed 1 bar
per hour.
d) Clogged non­return valve or pressure pipe. Clean or
replace the parts (fig. 10).
e) Air leaks from the unloader valve when the compressor
is operating. Check or replace the unloader valve (fig. 9).
f) Defective valve plate. Contact your JUN­AIR distributor.
3. Loud noise from compressor:
a) Most likely broken suspension spring(s). Replace the
spring and ensure that motor position is horizontal.
b) The internal pressure pipe touches the rib cover or
the cylinder block. Dismount the rib cover and bend the
pressure pipe away.
4. Compressor gets very hot and/or uses a lot of oil:
a) Incorrect oil level. The level must appear in the oil level
glass (fig. 5).
b) Wrong oil has been filled in the compressor. Use only
SJ­27 synthetic lubricant which has the correct viscosity.
c) Leaks. See point 2c.
d) Clogged intake filter. See point 2b.
e) Too high ambient temperature. Do not install the
compressor in a cabinet unless adequately ventilated
(fig. 1).
f) The compressor is overloaded (i.e. it is operating more
than 50% of the operation time). Contact your JUN­AIR
distributor.
5. Compressor starts when no air is being used:
a) Leaks. See point 2c.
6. Compressor starts and stops more frequently than
usual:
a) Condensate in the air receiver. Empty the receiver by
means of the drain cock (fig. 6).
b) Leaks. See point 2c.
Pressure vessel
Pressure tested at:
4­25 liter:
40­50 liter:
Directions for use
Application Receiver for compressed air.
Receiver specifications See name plate.
Installation
Tubes, etc. must be made of suitable
materials.
Placement Observe the working temperature of
the receiver.
Ensure that sufficient room for
inspection/maintenance is available
in a horizontal position.
The receiver must be kept in a
horizontal position.
Corrosion protection The surface treatment must be
maintained as required.
Internal inspection at least every
5 years.
Drain moisture at least once a week.
Alternation/repair No welding must be made on
pressurized parts.
Safety valve Ensures that PS will not be exceeded.
Never adjust to a higher pressure
than PS.
The capacity of the valve must be
calculated in accordance
with the volume of air supplied by
the compressor.
(PS = Maximum working pressure
of the receiver)
Declaration of Conformity
NOTE: The declaration of conformity is only valid for units
operating at 20 V/50 Hz, x400 V/50 Hz, 12 V DC or 24 V DC.
The manufacturer, JUN­AIR International A/S, declares that the
products mentioned in this manual are in conformity with:
• 87/404/EEC ­ 90/488/EEC ­ 9/68/EEC Council Directive
relating to Simple Pressure Vessels
• 89/92/EEC ­ 91/68/EEC ­ 9/44/EEC ­ 9/68/EEC
Council Directive of Safety of Machinery
• 89/6/EEC Council Directive of Electric Magnetic
Compatibility
• 7/2/EEC Low­voltage Directive
Flemming Frisch Andersen
Test and Certification Administrator
24 bar
18.3 bar
Operating manual
GB