vacuubrand ME 4 NT Instructions For Use Manual

Also see for MD 4 NT VARIO: Instructions for use Instructions for use

vacuubrand ME 4 NT Instructions For Use Manual Manual pdf 18 page image

Documents are only to be used and distributed completely and unchanged. It is strictly the users’ responsibility to check carefullythe validity of this document with respect to his product. Manual-no.: 999155 / 29/01/2009page 18 of 36During operation• Maximum ambient temperature: 40 °C• Make sure ventilation is adequate especially if the pump is installed in a housingor if the ambient temperature is elevated.• Potentially dangerous gases or vapours at the outlet of the pump have to bedrained and disposed appropriately.• Due to the high compression ratio of the pumps, the pressure at the outlet portmight get higher than the maximally permitted pressure compatible with the me-chanical stability of the system. Ensure that the pump outlet is not blocked orrestricted.ME 4R NT:• Attention: Do not unscrew the dispensing screw completely! There are no stopsat the end of the threads!If the pump is installed in altitudes of more than 1000 m above mean sea level checkcompatibility with applicable safety requirements, especially IEC 60034 (motor mightoverheat due to insufficient cooling).Do not start the pump if the pressure difference between inlet and outlet portsexceeds max. 1.1 bar. Attempts to start the pump at higher difference may causeblockade and damage of the motor.Check compatibility with maximally permitted pressure at outlet and maximumpressure difference between inlet and outlet ports.ME 4R NT:For continuous operation at inlet pressures above atmospheric pressure the inletpressure must not exceed the outlet pressure. The maximally permitted pressureat the outlet is 4 bar absolute.Operating the pump at high inlet pressure or pumping dusty gases for a long timemay cause clogging of the silencer. Check the silencer regularly and replace or installa hose nozzle (order no. 639758) with clamping ring (order no. 639729) instead.Use of a suitable valve to isolate the pump from the vacuum system is recommendedto allow the pump to warm up before pumping condensable vapours or to clean thepump before it is switched off.When assembling, ensure vacuum-tightness. After assembly, check the whole sys-tem for leaks.Secure hose connections at the pump appropriately against unintentional detach-ing.Notes prior to the use of the manometers (only ME 4R NT):The manometers used are manometers with glycerin filling. The overpressure ma-nometer indicates the overpressure relative to the atmospheric pressure at the placeof installation. The vacuum meter indicates the absolute pressure.Install the pump in the room of operation.Prior to use the reference chambers have to be ventilated.Else, not ventilating the manometer may lead to a systematic measuring error.Ventilate the manometer using the pressure compensationvalve. Close the valve after ventilation.☞ Repeat if necessary until dial shows zero with measuringconnection ventilated to atmosphere.pressurecompensationvalveNOTICE