Operating and Maintenance Instructions
Submersible Mixer GTWS/B/I 740/1040/1540/204/254/304
MTe12318a1p.
FRANZ EISELE u.SÖHNE GmbH u.Co.KG Telefon07571/109-0
Pumpen- und Maschinenfabrik Telefax 07571/10988
3.5 Electronic leakage control
Anelectrode isinstalledinthe gearboxoilcompartmentwhich indicates theingressoffluid viaasignal
lampof the electronic evaluation system (on theswitchorinthecontrolbox).
Whenafaultis indicated, change the oil and checkthemotorcompartment (see 5. Maintenance and
inspection).Ifthelamplightsupagain,themechanicalsealmustbe replaced.
Attention:thisleakagecontrolisaveryimportantcomponenttoensurethatthemixerfunctionscorrectly.
Atthesame time it is anitem of operating equipment whichensures protection.
Itisnotpermittedtooperatetheunitwithouttheleakagecontrol.
Correctfunctioning is tobecheckedandensured on start-upandmonitored at regular, short intervals.
The electronic evaluation system required for this is available as an accessory (not included in the
scopeofsupplyofthemixersGTWSBandGTWSI).
3.6 Motor protection
Whenmotorprotectionswitchesareusedwithonlyabi-metalactuator,noreliableshut-downisensured
inthe eventofoverheating,i.e. thethermalcontactsinstalled inthesubmersiblemotor mustbelooped
withthe control power circuit.
Thethermalcontactsare designed as normallyclosed (standard:230VAC,1.6Amax.)
3.7 Unit cable
Tomountacontrol/switch,the mixershouldbe loweredcompletelydue tothelength ofcableavailable.
Onlyoriginalcableorlineterminalsmaybeused.
Thedistancebetweenthe cable clampsmust notexceed50cm (GTWSB:70cm).Allscrewsareto be
protectedagainstworking loose.
Inareasinwhichscrapingagainststructuralpartsis to be expected, the connection cable should
beadditionallyprotectedand/ or fixed. The connection cable, protectivetubeandlineterminals are
tobechecked at regular,short intervalsfordamage and replaced after2 years atthelatest.
3.8 Recommended protective equipment
Topreventapotentiallydangeroussituation and prevent operation of the mixer when not submerged
asquicklyaspossible,westronglyrecommendinstallation
ofanautomaticloadgauge which switches the mixer offwhenitrunsempty.
4. Start-up
4.1 Free movement
Before start-up and after long periods of standstill, free movement is to be checked by turning the
propellertoandfro (first disconnect unit from power supply).
4.2 Checking oil level (see5. Maintenance and inspection)
Beforestart-up,the specified oil levelis to be checked byunscrewing the oil fillerplug marked in red
(01 19 mm af).
