Prebena TWINMAX 420 Manual Original página 17

drain tap (fig. 26) under the tank. Take care if there is compressed air
inside the cylinder, and water could flow out with considerable force.
Recommended pressure: 1 ÷ 2 bar max. Condensate of compressors
that are oil lubricated must not be drained into the sewer or dispersed
in the environment as it contains oil.
OIL CHANGES – TOPPING UP WITH OIL
The compressor is filled with oil Z200.40. We recommend a full
change of oil in the pumping element within the first 100 hours of duty.
Unscrew the oil drain plug on the housing cover, allow all the oil to flow
out, and re-screw the plug (fig. 27 - 28).Pour oil into the upper hole
of the housing cover (fig. 29 - 30) until it reaches the level indicated
on the stick (fig. 9) or indicator (fig. 11) Pour oil into the upper hole of
the head (fig. 30) in belt assisted units designed for topping up in that
area. Once a week check oil level of the pumping element (fig. 11)
and see if it needs topping up. For operation at ambient temperature
in the range -5°C to +40°C, use synthetic oil Z200.30. The advantage
of this oil is that is does not lose its characteristics either in winter or
summer. Do not drain used oil into the sewer or dispose of it in the
environment.
OBSERVE THIS TABLE FOR OIL CHANGES
TYPE OF OIL
PREBENA Compressor oil Z200.40.......................................500
PREBENA Synthetic oil for compressors Z200.30.................400
WHAT TO DO IF SMALL MALFUNCTIONS OCCUR
Loss of air in valve under pressure switch
This trouble depends on poor tightness of the check valve – take the
following action (fig. 31):
– Discharge all pressure from the tank
- Unscrew the hexagon-head of the valve (A)
- Carefully clean both the rubber disk (B) and its seat.
- Refit all parts accurately.
Air losses
These can be caused by poor tightness of a union – check all unions,
wetting them with soapy water.
Compressor turns but does not load
Coaxial compressors: (fig. 32)
- this may be due to failure of the valves (C1 – C2) or of a seal (B1 –
B2): replace the damaged part.
Pulley drive compressors: (fig. 33)
- this may be due to failure of the valves (F1 - F2) or of a seal (D1 –
D2): replace the damaged part.
- Check if there is too much condensate water inside the tank.
Compressor no starting
If the compressor has trouble starting, check the following :
- Does mains power match that of the data-plate? (fig. 14)
- Are power cable extensions of adequate diameter or length?
- Is the work environment too cold? (under 0°C)
- For series VX/AB: was the thermal-breaker tripped? (fig. 20)
- Is there oil in the housing to ensure lubrication? (fig. 11)
- Is power supplied to the electrical line (sockets well connected,
thermal- breaker, fuses in good condition).
Compressor not stopping
- If the compressor does not stop when maximum pressure is
reached, the tank safety valve comes into operation. To repair the
valve, contact your nearest service centre.
IMPORTANT
- Do not on any account unscrew any connection while the tank is
pressurised always check if the tank is pressure free.
- Do not drill holes, weld or purposely deform the compressed air
tank.
- Do not do any jobs on the compressor unless you have disconnected
the power plug.
- Temperature in operating ambient: 0°C +35°C.
- Do not aim jets of water or inflammable liquids on the compressor.
- Do not place inflammable objects near the compressor.
- During down-times, turn the pressure switch to position "0" (OFF).
- Never aim the air jet at people or animals (fig. 34)
- Do not transport the compressor while the tank is pressurised.
- Be careful with regard to some parts of the compressor such as the
head and delivery tubes, as they can reach high temperatures. Do not
touch these parts to avoid burns.(fig. 18 - 19)
- Transport the compressor, lifting or pulling it with the appropriate
grips or handles (fig. 4 - 6)
- Keep children and animals well away from the machine operating
area.
- If using the compressor for painting:
a) Do not work in closed environments or near to naked flames;
b) Make sure there is adequate exchange of air at the place of work;
c) Protect your nose and mouth with an appropriate mask. (fig. 35)
- If the electrical cable or plug are damaged, do not use the compressor
and contact an authorised service centre to replace the faulty element
with an original spare part.
- If the compressor is located on a shelf or on a top above floor height,
it must be secured to prevent it falling while in operation.
- Do not put objects or your hands inside the protective grilles to avoid
HOURS OF DUTY injury to yourself or damaging the compressor. (fig. 36)
- Do not use the compressor as a blunt object toward things or
animals, to avoid serious damage.
- When you have finished using the compressor, always remove the
plug from the power socket.
ELECTRO-COMPRESSOR
Maximum operating pressure 10.5 bar
Minimum operating pressure 10 bar
N.B. Two-stage compressors can be supplied on request for use up
to 14 bar. In this case:
Maximum operating pressure 14.75 bar
Minimum operating pressure 14 bar
NOTE: For the European market, the compressor tanks are
manufactured to meet Directive CE2009/105. For the European
market, the compressors are manufactured to meet Directive
CE2006/42.
Acoustic pressure measured free-field at a distance of 4m: ±3dB(A)
at maximum operating pressure. (tab. 3)
Mod.
TWINMAX 420
TWINSTAR 470
MOUNTAINE 670
ORKAN 670
TWINSTAR 670
TWINSTAR 860-15
TWINSTAR 970
MOUNTAINE 1450
The level of acoustic pressure can increase from 1 to 10 dB(A)
according to the place in which the compressor is installed.
INSTRUCTION FOR USE AND MAINTENANCE OF THE
The pressure vessel is intended to be used for storage of compressed
air or nitrogen. It has been designed for mainly static applications.
No account has been taken of loads due to wind, earthquakes or to
reaction moments or forces caused by the connections or piping.
To ensure operation of compressed air vessel under safe
17
CV/kW dB(A)
3 – 2.2 74
3 – 2.25 76
5.5 – 4.1 75
5.5 – 4.1 75
5.5 – 4.1 75
5.5 - 4.1 75
5.5-7.5 76
10 – 7.5 78
PRESSURE VESSEL
EN