Operating Instructions Submersible drainage pump
Contents
1. instalation steers teeter ee ein bid ae aloe anaes Electrical connection Sense of rotation Winding thermostat Wiring diagrams Operation through frequency converter e Installation Installation with guide rail system Mobile installation e Maintenance Service Mobile operation Maintenance Checking the seal chamber Oil changing Cleaning Repairs Malfunctions e Sectional drawing e Spare parts list e Declaration of conformity ersuunneernsennnennnnnnsnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn tan page 3 page 2 page 3 page 4 page 5 page6 7 page 8 page 9 10 page 11 page 12 page 13 Operating Instructions Technical Data US 151 E ES US 151 D DS US 251 D DS Supply voltage V 1 x 230 3 x 400 Power input P1 kW 1 68 1 60 2 60 Nominal current A 7 6 3 0 4 4 cos phi 0 94 0 76 0 86 r p m 1 min 2810 2925 2860 weight kg 27 5 29 0 28 0 29 5 28 0 29 5 max switch frequency 30 h max water temperature 40 C protective system IP 68 Description Application This manual applies to a Jung Pumpen submersible drainage pump US 151 or 251 with 10 0 m cable S models with mounted on level control Picture 1 dimensions i z e i k 24026 01 page 4 The pumps of the US series are designed for usual domestic drainage water with solids up to a of 10 mm2. VDE Ausweis Nr 135569 G US UB Bei einer nicht mit uns abgestimmten nderung des Ger tes verliert diese Erkl rung ihre G ltigkeit By altering the device without approval the declaration would invalidate Toute modification de la machine effectu e sans notre accord annule la valadit de la pr sente d claration Steinhagen den 23 06 2003 Schweitzer Abel Gesch ftsf hrer Techn Gesch ftsleitung 40010241 DOC TB Sn Ersetzt dito vom 14 01 03 page 13
3. phase inverter Watch out for the start bump which can be powerful page 7 Operation through frequency converter If you want to operate pumps through a frequency converter please contact your distributor If the technical feasibility is already checked the pumps have to be ordered as a special version They need a special PTC thermistor for motor protection and a tripping unit with a conformity certificate e g PTB 3 53 PTC A Use frequency converters only for deceleration If three phase current pumps are operated through a frequency converter the r p m change proportional to the input frequency Frequency converters have a setting range between nearly 0 Hz and more than 50 Hz Because of physically reasons the pumps must not be operated with higher frequencies than indicated on the name plate If the frequency rises beyond the rated value the absorbed power escalates to the overload of the motor To recognize pumps with a PTC thermistor please check the name plate The last letter in the field of the motor type must be a K Example motor type D 160 4 200 K has a PTC thermistor and can be operated through a frequency converter Pumps without this mark cannot be operated through a frequency converter Example motor type D 112 4 200 Additionally the pumps have a label at the lead end to point out the possible frequency converter operation Supply voltage of the PTC thermistor max 2 5 V Installa
4. pump units which convey hazardous media must be decontaminated All waste emissions such as used oil must be appropriately disposed of oil spills must be cleaned up and emissions to the environment must be reported On completion of work all safety and protective facilities must be reinstalled and made operative again Prior to restarting the machine the instructions listed under Electrical Connection and Installation are to be observed Unauthorized alterations and production of spare parts Any modification may be made to the machine only after consultation with the manufacturer Using spare parts and accessories authorised by the manufacturer is in the interest of safety Use of other parts may exempt the manufacturer from any warranty or compensation claims Unauthorized modes of operation The reliability of the machine delivered will be only guaranteed if it is used in the manner intended in accordance with clause 1 of this manual The limit values specified in the data sheet must under no circumstances be exceeded Warranty claim Jung Pumpen pumps are long living high quality products with expected reliable operation However should the need arise for a warranty claim please contact your Jung Pumpen distributor Operating Instructions List of contents e General safety instructions WEISt OF CONTENIS H 22 4 14 rs a a N e Technical data Dimensions Application Transportation e Safety precautions
5. the installation sluice and reflux valves the oil level in the oil chamber if the impeller moves freely direction of rotation The pump should be installed correspondingly to picture 6 7 Under DIN EN 12056 2 the pressure tube must be taken in a loop over the local back up level and secured with a reflux valve Observe the min flow speed of 0 7 m s in the pipe work Always use the shackle to carry the pump never lift it at the cable or the hose To lower the pump in a deep tank use a Stationary installation To remove the pump easily we recommend our guide rail systems Adjust the duck foot bend drill the holes through the base of the duck foot bend and install the coupling unit the guide tubes and the guide bracket with the enclosed screws and plugs Install the pipe work including a ball reflux valve or a swing type check valve and a stop valve Mount the guide rail claw on the pump fasten the chain at the shackle and lower the pump via guide tube into the sump A fastening device for a hoist simplifies the pump installation page 8 Picture 7 installation example with GR 50 alarm device Jen SEH ae ON Q 4 24386 04 Sump dimensions min 40 x 70 cm If a covering plate is installed intend a sump ventilation WARNING Observe the measurements of the level sensors as shown in picture 6 7 The sensors must not
6. Operating Instructions General Safety Instructions Application Electrical Connection Installation Maintenance You have bought a Jung Pumpen product and therefore purchased quality and performance Guarantee this achievement by an installation according to the operating instructions so that our product can meet your demands to your full satisfaction Please note that damages as a result of poor installation will affect the guarantee For this reason please follow the advice of the operating instructions Like any other electrical appliance the operation of this product can fail by electrical failure or technical faults It is wise to always consider standby pumps emergency generator and a control unit fitted with mains independent alarm US 151 E ID No 09240 07 US 151 ES ID No 09241 01 US 151 D ID No 09242 07 US 151 DS ID No 09243 01 US 251 D ID No 09244 07 US 251 DS ID No 09245 01 Submersible drainage pump 25528 4 1 0304 page 1 Operating Instructions General Safety Instruction This operation manual gives basic instructions that should be followed carefully during installation operation and maintenance It is essential that this manual is carefully read by the responsible personnel operator before assembly and commissioning It is always to be kept available at the installation site Identification of safety instructions in the operating manual Safety instructions given in this manual
7. The pumps are suitable for dirty rain ground and drainage water they must not be used for pumping sewage water from lavatories Allowed temperature of pumped medium Continuous operation 40 C S1 operation Intermittent operation S3 operation 25 2 5 min operation 7 5 min stand by At different operating conditions in explosion hazardous locations please ask the industrial and trade supervision the building inspection or the employer s liability insurance association If kept dry the pump can be stored down to a minimum temperature of 20 C The flooded pump must not freeze noise emission gt 70 dB A Transportation and storage horizontal position N Always use the shackle to carry the pump cannot roll or fall over and injure people or damage property temperature of 20 C The flooded pump must not freeze against moisture and heat The impeller should be rotated occasionally to prevent the seals from sticking together inspected before it is taken into operation Pay special attention to the seals and the cable gland The pump can be transported and stored in vertical or never lift it at the cable Make sure the pump If kept dry the pump can be stored down to a minimum For longer periods of storage the pump must be protected After a long period of storage the pump should be Follow the instructions of Operation Please pay attention to the following Operating Instructions IN regul
8. ate the spiral housing and ensure the correct operation of the pump Blockage of impeller cause solid or fibrous admixtures blocking the impeller remedy check impeller and spiral housing as explained under cleaning Reduced performance curve cause worn out impeller remedy change impeller cause wrong sense of rotation remedy change two of the three leads inside of the plug Operating Instructions Picture 8 sectional drawing 04043 D 27072 E 25291 23866 D 23754 23867 DS i 25588 E D 23773 25589 ES E 25834 22917 03931 03782 04035 23860 03903 50cm 13133 22695 03203 22696 j 22697 23861 l 22698 13403 03280 03269 25230 151 23757 251 19724 14263 23758 0 2 2 09240 impeller gap x 0 8 page 11 Operating Instructions Code No 03202 03203 03269 03280 03782 03903 03931 04035 04043 05413 11558 12811 13133 13403 14263 17505 19724 22641 22695 22696 22697 22698 22917 23754 23757 23758 23773 23774 23781 23860 23861 23866 23867 25230 25291 25295 25588 25589 25834 Description hexagon socket screw M6 x 16 hexagon socket screw M6 x 20 O ring 10 x 2 5 plug 4 circlip for shaft A 25 x1 2 O ring 38 x 3 5 angular ball bearing 3205 rotary shaft seal 25 x 35 x 7 BA Duo deep groove ball bearing 6204 2RSR shim rings 12 x 16 x 0 2 stator D 90 2 75 mechanical seal 16 x 18 8 oil Spinesso 22 700 cm insulating foil wear p
9. ations at installing the pump s or ask your qualified electrician distributor regulations for electrical installations in Germany VDE 0100 VDE 0165 regulations for prevention of accidents in sewage technical installations in Germany GUV 7 4 GUV 17 6 guidelines for explosion protection in Germany GUV 19 8 electrical installations in explosion hazardous areas in Germany Elex V Safety precautions In order to minimize the risk of accidents in connection with the service and installation work the following rules should be followed Never work alone Use a lifting harness safety line and a respirator as required Do not ignore the risk of drowning Make sure there are no poisonous gases within the work area Check the explosion risk before welding or using electric hand tools Do not ignore health hazards Observe strict cleanliness Bear in mind the risk of electrical accidents Make sure that the lifting equipment is in good condition Provide a suitable barrier around the work area e g guard rail Make sure you have a clear path of retreat Use safety helmet safety goggles and protective shoes All personnel who work with sewage systems must be vaccinated against diseases to which they may be exposed A first aid kit must be close at hand Note that special rules apply to installation in explosive atmosphere Follow all other health and safety rules and local code
10. be installed below the inlet The control unit must be installed in well ventilated room above the back pressure level Mobile operation deaeration For mobile operation and retrofitting of existing sumps a pump base installation is uncomplicated and easy to maintain Mount a 90 elbow to the discharge install the pressure pipe fasten the chain at the shackle and lower the pump into the sump A fastening device for a hoist simplifies the pump installation WARNING The level sensors must not be installed below the inlet The control unit must be installed in well ventilated room above the back pressure level Climbing pressure pipe work has to be installed frost protected If a flexible hose is connected to the pump no reflux valve must be installed and the hose must have a gradient to ensure a completely drained off hose when the pump stops working When the pump is submerged again water in the hose will prevent the deaeration of the spiral housing and therewith the correct operation of the pump For the same reason the pump may not operate properly when it is submerged in switched on condition If the pump is used in sumps that can dry out it is also possible to deaerate the spiral housing by drilling a 8 mm hole in the pressure tube above the pressure outlet of the pump In case of a damage at the pump a slight quantity of the oil chamber filling can leak into the pumping medium Operating Instructions Mai
11. er page 12 Operating Instructions JUNG PUMPEN GmbH amp CoKG Tel 05204 17 0 o Industriestr 4 6 Fax 05204 80368 a JUNG 33803 Steinhagen Germany e Mail info jung pumpen de PUMPEN Zuverl ssige Abwasserentsorgung EG Konformit tserkl rung Declaration of EC Conformity Attestation de Conformite CE Hiermit erkl ren wir da alle Exemplare unserer Ger te Herewith we declare that all our devices Nous attestons par la pr sente que tous nos produits U3K UAK bis 3 2kW US au er Ex USK J67 UB den wesentlichen Schutzanforderungen folgender EG Richtlinien entsprechen comply with the following provisions applying to correspondent aux principales directives CE suivantes EG Niederspannungsrichtlinie 7323IEWG i d F 93 68 EWG EG EMV Richtlinie 89 336 EWG EG Bauproduktenrichtlinie 89 106 EWG Angewendete harmonisierte Normen insbesondere Applied harmonized standards in particular Principales normes harmonisees 73 23 EWG 89 336 EWG 89 106 EWG EN 60 335 1 EN 55 014 1 2 EN 12050 2 EN 60 335 2 41 EN 61 000 3 2 3 EN 60 034 T5 Angewendete nicht unter obige EG Richtlinien fallende technische Normen und Spezifikationen Applied national technical standards and specifications in particular Normes et sp cifications n entrant pas dans les directives ci dessus EN 809 VDE Ausweis Nr 93172 G U3K EN 292 Teil 1 2 VDE Ausweis Nr 70808 G UGK
12. late submersible ball contact switch with 9 5 m cable hexagon socket screw with TUFLOK M6 x 16 distance bush 25 x 6 plug housing for cable gland system coni 1 sleeve housing for cable gland system coni 1 round plug for cable gland system coni round sleeve for cable gland system coni tapered ring WA JB 52 stator casing impeller US 251 foot strainer rotor shaft with rotor D 90 2 75 cap 18x6 CEE plug with motor protection 3 7 5 5 A O ring 135 x 5 spiral housing with separating element cable gland A3 10 0 m with CEE motor protective plug cable gland A3 10 0 m with CEE motor protective plug and float switch impeller US 151 stator E 90 2 75 shock proof plug with motor protection 8A 30uF cable gland with shock proof plug and motor protection 8A 30UF cable gland with shock proof plug 8A 30uF and float switch rotor shaft with rotor E 90 2 75 Sar er as 44004440 444414444 ran AQ lt i aaan aa an a aD Co RR Oy Aa aaa CC NGO m Be BoP BP TER DEIN DRS EANPAFESRERER DS BE saa 4 4 4 4 4 4 2 4 42 04 4444 0180 44 44 4 4 Ang Replacement kits 14999 oil Spinesso 22 1 Liter bottle 23864 Stator casing with motor D or DS version consisting of 11558 13403 22695 22697 23754 24257 Seal kit consisting of 03269 03903 04035 12811 23860 25587 Stator casing with motor E or ES version consisting of 13403 22695 22697 23754 25291 By ordering spare parts indicate type of the pump and the part numb
13. ly safe circuits Exi are normally required for the automatic level control system by level regulators A AJung Pumpen control unit gives you the certainty of design under safety regulations and an acceptance of work without any problems Level sensors must be used at low voltage For further details please see data sheet o m Local rules may specify otherwise To prevent the pump from blocking after long rest periods an additional daily trial run unit can be installed Connection only to a mains supply installed in accordance to the local regulations For fusing use only 16 A slow fuses or automatic circuit breaker with C or D characteristic former G and K Because the motor s nominal voltage is measured at the terminal board of the pump please consider the voltage drop of long supply cables The motors of the three phase a c pumps must be protected by a suitable overcurrent release Adjustment as following direct start 10 of the nominal current star delta start nominal current x 0 58 10 If the protective arrangement has trigged eliminate the trouble Replace the cable if the cable jacket is damaged Do not pinch the cable or pull it around sharp bends Always install the control unit in a dry and well ventilated room above the backpressure level Never install the control unit in the sump Earthing For safety reasons the earth conductor should be appr 50 mm 2 inch longer tha
14. n the phase conductors If the motor cable is jerked loose by mistake the earth conductor should be at last conductor to come loose from its terminal This applies to both ends of cable Ensure the correct earthing of the pump and the control unit Operating Instructions Picture 2 single phase connection mains supply 230V 50Hz pre fuse 16A motor 8A protection u Ir E E E I me B1 only at US UB ES pump motor Sa US UB E On Off US UB ES Manual Automatic 25628_02 Picture 4 motor wiring single phase black white a er m lt 3 gt v a L motor protector thermostat main ud Y Coni plug connector 24584_04 page 6 Picture 3 three phase connection 3x230 400V N PE 50Hz rotary field H1 d bane black brown black u 3 a a j U v W 32 PE laed between blue and green yellow black white 30 white 32 a gt x p a a 5 red uhite 2 yellow Wi yallow white W2 motor protactor thermostats black white UZ standard Y connetion X crimp connector Y Coni plug connector Operating Instructions Never operate the pump without a suitable control unit A In case of repairs or maintenance works pull the protective plug Terminal 6 of the motor contactor K1 and the protective motor relay F1 are still alive even when K1 is released Never restart the pump without a fault recove
15. non available with which would affect safety are identified by the following symbol General danger for personnel Dangerous voltage Danger for machine and function PP It is imperative that signs affixed to the machine e g rotation arrow fluid connection symbols data approval plate be observed and kept legible Qualification of personnel An authorized certified electrician and mechanic shall carry out all work Scope of responsibility and supervision of the personnel must be exactly defined by the plant operator If the staff does not have the necessary knowledge they must be trained and instructed which may be performed by the machine manufacturer or supplier on behalf of the plant operator moreover the plant operator is to make sure that the contents of the operating manual are fully understood by the personnel Hazards in the event of non compliance with the safety instructions Non compliance with the safety instructions may produce a risk to the personnel as well as to the environment and the machine and results in a loss of any right to claim damages or compensation For example non compliance may involve the following hazards Failure of important functions of the machine plant Failure of specified procedures of maintenance and repair Exposure of people to electrical mechanical and chemical hazards Endangering the environment owing to hazardous substances being released Safety reg
16. ntenance Take out the main fuses to isolate the mains supply of both control unit and pump before any works and make sure it cannot be energized again Check the cable on mechanical or chemical damages At using a chain to lift the pump please pay attention to the rules for prevention of accidents Chains have to be inspected regularly by qualified personal The motor of the UFK series has the protection type flameproof enclosure Only authorized workshops or the manufacturer are permitted to carry out repairs effecting the flameproof ness In case of repairs the gap peripheries have to be inspected for damages defective parts must be replaced by genuine spare parts Jung Pumpen disclaims all responsibility for work done by untrained unauthorized personnel General safety clean the pump thoroughly beware of the risk of infection follow local safety regulations The pump is designed for use in liquids which can be dangerous to health When working on the pump prevent injuries to the eyes and skin by wearing goggles and rubber gloves cleaning the pump before any works cleaning the parts after dismantling hold a cloth over the drain plug to prevent splatter when opening the oil chamber In case of contact with dangerous liquids eye contact rinse your eyes immediately in running water for 15 min Hold your eyelids apart with your fingers Contact an eye specialist skin contact remove contaminated clothes wash yo
17. pindle oil make ESSO type Spinesso 22 or other mineral oils with a viscosity of 22 46 quantity see spare parts list WARNING Do not overfill the seal chamber otherwise the pump can seriously be damaged Changing the impeller 1 Take the 3 hexagon socket screws 19724 out of the strainer base 23758 and remove it together with the wear plate 14263 2 Take the hexagon socket screw 19742 together with the distance bush 23774 out of the impeller 25230 or 23757 and remove it When the impeller is removed from the shaft make sure you do not lose parts of the mechanical seal 3 Push the new impeller 25230 or 23757 on the shaft and secure it with the hexagon socket screw 19724 and the distance bush 23774 4 Clean the receiver thoroughly and push the wear plate 14263 into position The impeller gap between the lower edge of the vanes and the wear plate should be 0 8 1 0 mm Differences should be regulated by shim rings 05413 under the distance bush 22641 5 Fasten the wear plate and the strainer base with the hexagon socket screws 19724 Changing the mechanical seal 1 Take off the impeller as described above 2 Take out the distance bush 22641 as well as the mechanical seal 12811 with a small flat screwdriver Clean the receiver thoroughly and push in the new mechanical seal 12811 3 Assemble the impeller as described under changing the impeller Operating Ins
18. ry if a protection device has released Motor protection single phase model The motor is protected by an overcurrent relay and a built in winding thermostat Inadmissible operating conditions will release the protection devices If so disconnect the pump before repairs or maintenance to prevent automatically pump restarts To restart the pump again after released overcurrent relay the pump can be restarted by pushing the Ein Aus button In case of a released thermostat the pump switches on again after cooling down Winding thermostat threephase models The motor is protected by an overcurrent relay and a built in winding thermostat Inadmissible operating conditions will release the protection devices If so disconnect the pump before repairs or maintenance to prevent automatically pump restarts To restart the pump again after released overcurrent relay the pump can be restarted by pushing the Reset button In case of a released thermostat the pump switches on again after cooling down Sense of rotation only three phase models Before installation you have to check the sense of rotation At correct rotating field the start bump of the pump is into the opposite direction to the arrow on the top of the pump In case of wrong direction of rotation change two of the three phases of the mains supply Additionally the wrong sense of rotation is signaled by a red light in the CEE plug and can be corrected by the integrated
19. s and ordinances Electrical connection Following works should only be done by qualified and authorized electricians Jung Pumpen disclaims all responsibility for work done by untrained or and unauthorized personnel Heed operating voltage see name plate and additional labels Take out the main fuses to isolate the mains supply from the control unit before repairs or any other works and make sure it cannot be energized again If the pump is equipped with automatic level control there is a risk of sudden restart Before starting check the efficiency of the protective arrangements of the pump and the monitoring equipment Failure to heed this warning may cause a lethal accident Do not put the lead ends into water Irruption of water may cause malfunctions page 5 If persons are likely to come into physical contact with pump or pumped media the earthed grounded socket must have an additional connection to an earth ground fault protection device GFI When pumping near a lake a jetty a pond etc a safety distance of at least 20 m between the person and the pump is applicable Do not place the pump directly in a pool Observe the special safety regulations if used in connection with swimming pools Use the pump only in accordance to the data stated on the pump s plate resp in the technical data on page 4 Special rules apply to installation in explosive atmosphere Intrinsical
20. tion To ensure the proper installation consider the dimensions of the installation The sump has to be cleaned from all sediments before any installation or repair works The minimum height between the lifting hook and the floor shall be sufficient to lift the pump out of the sump The lifting equipment shall be able to hoist the pump straight up and down in the sump preferably without the need for resetting the lifting hook Oversized lifting equipment could cause damages if the pump should stick when it is lifted The lifting equipment has to be securely anchored Operating Instructions Picture 6 installation example with pedestal alarm device min 100 150 min min HALL 100 ITLL 3 24046 03 Single unit with pedestal sump dimensions min 40 x 50 cm If a covering plate is installed intend a sump ventilation rope or a chain Stay clear of suspended loads Take out the main fuses to isolate the mains supply both control unit and pump before any works and make sure it cannot be energized again Make sure the pump cannot roll or fall over and injure people or damage property In some installations the water and the pump can be hot Bear in mind the risk of burn injuries Before installation please check the visible parts of the pump and
21. tructions Cleaning The foot strainer prevents coarse impurities and fibres from reaching the impeller Regularly cleaning secures the maximum pumping capacity To clean the impeller and the spiral housing unscrew the 3 hexagon socket screws at the bottom side of the pump and take off the foot strainer To clean the impeller remove the cover as well Regularly cleaning of the impeller and the level control sensors or float switches secures the maximum pumping capacity and operational reliabilty ce Jung Pumpen GmbH amp Co Industriestra e 4 6 33803 Steinhagen Xx EN 12050 2 Abwasserhebeanlage f r fakalienfreies Abwasser DN 50 Hebewirkung siehe technische Daten Gerauschemissionswert lt 70dB A Korrosionsschutz Kunstharzlack Die beiden ersten Ziffern der Pumpen Nr bezeichnen das Produktionsjahr page 10 Torque ratio Ma for screw material for M 6 Ma 8 Nm 0 8 kpm for M 8 Ma 20 Nm 2 0 kpm for M 10 Ma 40 Nm 4 0 kpm Malfunctions Pump does not run cause missing mains supply remedy check supply voltage cause faulty fuse maybe too low remedy check fuse and change if necessary cause damaged supply cable remedy changing of the cable gland only by qualified personnel Pump runs but doesn t deliver water cause trapped air in the spiral housing remedy drain off the pressure tube or hose to ensure the opening of the reflux valve to deaer
22. ulations for owner operator All safety instructions contained in this manual all relevant national and local health and safety codes and any other service and safety instructions issued by the plant operator shall be complied with page 2 Safety instructions relevant for operation If hot or cold machine components involve hazards they must be guarded against accidental contact Guards for moving parts e g coupling must not be removed form the machine while in operation Any leakage of hazardous e g explosive toxic hot fluids e g from the shaft seal must be drained away so as to prevent any risk to persons or the environment Statutory regulations are to be complied with The pumping station must be kept tidy and in good condition Hazards resulting from electricity are to be prevented see for example the national specifications or the regulations of your local electricity supply company Safety instructions relevant for maintenance inspections and assembly work It shall be the plant operator s responsibility to ensure that all maintenance inspection and assembly work is performed by authorized and qualified personnel who have adequately familiarized themselves with the subject matter by studying this manual in detail Any work on the machine shall only be performed when it is at a stand still it being imperative that the procedure for shutting down the machine described in this manual be followed Pumps and
23. ur skin with soap and water seek medical attention if necessary To keep the reliability of operation the first oil change of the seal chamber should be made after 300 working hours max 6 months after that the oil should be changed every 1000 working hours not later than once a year If the pump delivers water with abrasive additions servicing should be carried out at adequate shorter intervals At decreasing flow rates or ascending noises the impeller has to be checked on wear and if necessary it has to be changed page 9 Checking the seal chamber The seal chamber has a filling and drain plug with hexagon head width across 13 mm To check the mechanical seal put the pump into a horizontal position and drain the oil into a clean graduated measuring can If the quantity of oil corresponds to the oil originally in place and is not discoloured milky the primary mechanical seal is in good condition Milky or yellowish grey oil indicates that water has leaked into the oil chamber In this case the oil filling should be renewed and inspected again after a further 300 hours If the oil is again found to be discoloured or infiltrated by dirty particles the mechanical seal should be checked for wear and replaced if necessary For automatically monitoring of the seal chamber the filling plug can be replaced by our seal leak detector DKG Code No 00252 or DKG Ex Code No 00249 Oil changing For the change of the oil use s
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