VACUUBRAND PC 3012 NT VARIO Duo - Manual (Page 21)

page 15 of 145
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Due to the high compression ratio, the pump may gen-
erate overpressure at the outlet. Check pressure com-
patibility with system components (e.g., exhaust pipe-
line or exhaust valve) at the outlet.
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Do not permit any uncontrolled pressurizing. Make
sure that the exhaust pipeline cannot become blocked
to avoid a risk of bursting!
☞
Maximum permissible pressure at the pressure trans-
ducer: 21.8 psi (1.5 bar) absolute.
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Keep the electrical power cord away from heated sur-
faces.
• Provide a firm, level platform for the equipment. Check
that the system which you are going to evacuate is
mechanically stable. Check that all fittings are secure.
Ensure a stable position of the pump without any me-
chanical contact other than the pump feet.
• Comply with maximum permissible pressures at in-
let and outlet and with maximum permissible pres-
sure differences between inlet and outlet. See sec-
tion ”Technical data”, pg. 26. Do not operate the pump
with overpressure at the inlet.
• Comply with maximum permissible pressures at the
pressure transducer. See section ”Technical data”, pg.
26.
• Avoid overpressure of more than 17.5 psi absolute (1.2
bar absolute) in the event that inert gas is connected to
the pump, to the gas ballast or to a venting valve.
• Note: Flexible elements will shrink when evacuated.
• Connect hoses gas tight at inlet and outlet of the pump.
• Connect hoses gas tight at the pressure transducer.
• Ensure that no foreign objects can be drawn into the
pump.
• Check the power source and the pump’s rating plate
to be sure that the power source and the equipment