User guide

page 20 of 61
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011
4.4 During operation
• Maximum ambient temperature: 40 °C
• Makesureventilationisadequateifpumpisinstalledinahousingorifambient
temperature is elevated.
• Potentially dangerous gases or vapours at the outlet of the pump have to be
drained and disposed appropriately.
• Duetothehighcompressionratioofthepumps,pressureattheoutletportmight
begeneratedbeinghigherthanthemaximumpermissiblepressurecompatible
with the mechanical stability of the system. Ensure that the pump outlet cannot
becomeblockedorrestricted.
If pumping condensable vapours (water vapour, solvents, ....), let the pump run with
gas ballast to reduce condensation in the pump.
Ifpumpisinstalledinaltitudesofmorethan1000mabovemeansealevelcheck
compatibility with applicable safety requirements, e. g. IEC 60034 (motor may over-
heatduetoinsufcientcooling).
Do not start the pump if the pressure at outlet portexceeds maximum 1.1 bar
(absolute).Attemptstostartthepumpathigherpressuresmaycauseblockadeand
damage of the motor.
Checkcompatibilitywithmaximally permitted pressure at inlet and outlet.
Prevent internal condensation, transfer of liquids or dust. The diaphragm and valves
willbedamaged,ifliquidsarepumpedinsignicantamounts.
Check the pumpregularlyforexternalsoiling and deposits, clean if necessary to
avoid an increase of the pump‘s operating temperature.
The motor is protected by a temperature sensor at the circuit board: Current
limitation if the temperature at the circuit board is higher than 70°C, switching off the
pumpifthetemperatureishigherthan85°C.Incaseofblockadeofthemotor(after
10 attempts to start-up) the pump is switched off.
If the pump is switched off due to safety measures, manual reset is necessary. Iso-
late the pump from mains. Eliminate cause of failure before restarting the pump.
Avoid high heat supply (e. g. due to hot process gases).
Awarmupperiod(approx.15min.)isrequiredtoensurethatratedultimatevacuum
and pumping speed are attained.
NOTICE
• Thegasoutlet(hosenozzle10mm)mustnotbeblocked.Theexhaustpipeline
has always to be free and pressureless to enable an unhindered discharge of
gases.
• Ifnecessaryconnecttheexhausttoasuitabletreatmentplanttopreventthedis-
charge of dangerous gases and vapors to the surrounding atmosphere.
• Attention:Installhosesofthecoolingsysteminawaytoavoidow/droppingof
condensed water onto the pumping unit (especially cables and electronic parts).
• Ensure that the coolant outlet pipeline is always free and that it cannot get
blocked.
• Maximumpermissiblecoolantpressureatthecondensatecooler:6bar(abso-
lute)
• Installcoolantvalvesalwaysinthesupplylineofthewastevaporcondenseronly.
• Complywith themaximum permissiblecoolant pressuresof additionalcompo-
nents in the coolant circuit (e.g cooling water valve).
• Avoidoverpressureinthecoolantcircuit(e.g.caused byblockedorsqueezed
coolant hoses).