EBARA DML, Instruction Manual

Page 1: ...tenance and inspection of the pump Contents page page １ Warning indication 2 ７ Maintenance 12 ２ Precautions of safety 3 1 Daily inspection 12 ３ Introduction 5 2 Regular inspection 12 1 Confirmation of pump and accessories 5 3 Precautions during stop operation 13 2 Confirmation of nameplate 5 4 When motor protection activated 13 ４ Product specification 6 5 Consumables 13 ５ Installation 7 ８ Troubles...

Page 2: ...y the contents shall be observed in any case Description of the indication Terms of warning Description Warning Wrong handling expects to raise a danger resulting in death or serious injury of the operator Caution Wrong handling expects to raise a danger resulting in slight injury of the operator or sole physical damage Note Providing specific precautions or specifically emphasizing information De...

Page 3: ... Disassembling repairing and modifying the pump shall be limited to a repair technician There is a possibility of injury caused by electric shock ignition abnormal functioning trouble etc Before entering inspection and repair cut OFF a power source at a main disconnect device which is equipped with an operating handle which is lockable in OFF position There is a possibility of electric shock and o...

Page 4: ...current or by leakage of enclosed liquid from mechanical seal Do not use the pump at an important facility computer cooling apparatus cooling apparatus for refrigerator etc Since machining oil rubber releasing agent and foreign matter used in pump production line enter the handling liquid operation of the pump shall be done after fully flushing the pump to confirm the absence of foreign matter dep...

Page 5: ...te Specifically care shall be paid on the frequency 50 Hz or 60 Hz Caution Do not operate a pump of 50Hz at 60Hz The operation at wrong frequency induces pump break caused by excess pressure and motor burn out caused by overload Do not operate a pump of 60Hz at 50Hz The pump performance deteriorates Fig 1 Name plate Name plate description Model of motor Pump name Capacity Unit L min Number of phas...

Page 6: ...ll be done after fully flushing the pump to confirm the absence of foreign matter depending on the facility Limit the handling liquid to water Do not handle oil seawater organic solvent etc other than water These liquids cause trouble of pump to result in electric leak and electric shock The pump is a submersible sewage pump Do not operate the pump for a long period of time or under vigorous start...

Page 7: ... immersed in water If the insulation resistance at the respective sections is 20MΩ or more there is no problem During the measurement keep the power source connection section of cables distant from the ground 2 Installation Warning On handling and installation work of the pump assure safety by confirming the mass and the shape of the pump referring to the appearance this instruction manual drawing...

Page 8: ...automatic operating system as shown in Fig 3 Water levels H1 and H2 are shown in the following table 8 When using electrodes for automatic operating system incorrect actuation may occur caused by scum and oil attached on the electrodes Frequency 2 2kW 3 7kW 5 5kW 7 5kW 11kW 15kW 22kW DML 50Hz H2 mm 547 627 724 724 778 778 841 H1 mm 279 279 310 310 329 329 342 DML 60Hz H2 mm 547 627 707 707 771 771...

Page 9: ...evice also needs to be provided in the final installation It is recommended to use a circuit breaker as main breaker that is suitable for isolation according to appropriate legal standard EN60947 2 and is equipped with an operating handle which is lockable in OFF position and complies with the other requirements of appropriate legal standard EN60204 1 clause 5 3 Caution Assure the tightening of co...

Page 10: ...ely conducted conforming to the Technology Standard of Electric Facilities b For the cases of long cable or other situations the ground fault breaker is actuated in spite of fully grounding of motor checked by a megger The phenomenon occurs from an electrostatic capacity between the cable and the ground Specifically a rush current at start of pump likely induces the actuation of the ground fault b...

Page 11: ...peated the pump life becomes short Once the Auto cut is actuated the motor does not start until it is cooled Even during the period of Auto cut functioning the power is supplied up to the pump Since the pump will restart without indication the inspection shall be given after cut OFF the power source 3 Operate the pump within the range given in the chart 4 Frequent start stop operations damage the ...

Page 12: ...ts are used they may lead to serious failures of water leak seizing and break of pump parts For regular inspection parts replacement and related works request the matter to the supplier or EBARA If inspection of pressure discharge rate voltage current etc finds any difference from those of normal state the phenomenon is a sign of accident Therefore it is important to give quick action to the matte...

Page 13: ... it at a dry site temperature of storage 5 40 C On reusing the pump follow the instructions of ５ Installation and ６ Operation 4 When motor protection is activated Check causes that motor protection is activated After removing the causes start the operation again 5 Consumables 1 Replace the parts when they enter the following described condition Consumable parts Mechanical seal Sheet packing Seal w...

Page 14: ...e the bearing Repair or replace the mechanical seal The pump can be operated but it stops after a while Prolonged dry operation induced the functioning of Auto cut High liquid temperature induced the functioning of Auto cut Raise the water level Lower the water level Thermal protector is actuated High liquid temperature Long dry operation Eddy current Lower the liquid temperature Raise the stoppin...

Page 15: ...nspect the connection section and the magnet switch Check the nameplate Establish the correct rotational direction refer to ６ 2 2 Narrow the opening of the gate valve If no gate valve is used replace the pump with the one having lower head Disassemble the pump to remove the foreign matter Repair or replace the bearing Pump vibrates generating large noise Pump is in reverse rotational direction Pum...

Page 16: ... 801 ROTOR 1 275 IMPELLER BOLT 1 211 AIR VENT VALVE 1 193 OIL PLUG 1 174 DISCHARGE PIPE 1 135 WASHER 1 135 2 WASHER 4 135 1 WASHER 1 120 7 BOLT 4 120 6 BOLT 3 120 5 BOLT 2 120 4 BOLT 4or6 120 3 BOLT 4 120 2 BOLT 8 120 1 BOLT 4 117 2 SEAL WASHER 1 117 1 FLANGE GASKET 1 115 4 O RING 1 115 3 O RING 1 115 2 O RING 1 115 1 O RING 1 111 MECHANICAL SEAL 1 107 WEARING RING 1 080 BUSHING 1 039 KEY 1 021 IM...

Page 17: ...rocedure 3 to 5 Note 3 Apply the adhesive LOCKTITE 262 to the impeller bolt in the following way for looseness prevention 1 Install the motor so that the shaft end serves as facing up from the level a little After degreasing a screw hole enough pour out the adhesive LOCKTITE 262 until it is full of a screw hole 2 An impeller bolt 275 should also degrease enough and should apply the adhesives LOCKT...

Page 18: ...t addresses are listed at the end of this Instruction Manual with the information about the description given on the nameplate and the condition of the failure abnormality Note Packing materials after installation and wasted lubricant oil and grease and parts after inspection and repair shall be transferred to a qualified waste treatment contractor observing the applicable laws and the regional re...