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MH 1202.04 GB

Start-up

Before starting

After installation or whenever it can be assumed 

that the pump has been emptied, the pump must be 

thoroughly filled with liquid. See chapter  ”Suction 

Line ”, page 5.

  

!

  Make sure the prime mover is disconnected 

and can not be started accidentally.

While filling the pump rotate the shaft by hand. If 

the shaft is not accessible, rotation can be performed 

from the motor fan, to ensure that the rotor bores 

and the shaft seal com part ment is filled. 

  

!

  Do not forget to fit the motor fan cover again 

before making start of motor possible.

Open the shut­off valves in the inlet and delivery 

pipes to the full extent. Set pump pressure relief 

valve at the lowest opening pressure. The pump is 

now ready for starting.

If the suction pipe cannot be completely filled, it is 

important to ensure that the trapped air is evacuated 

without any pressure build up.   

 

 

(See fig. 7 De aeration). 

   

ATTENTION

 

Starting a dry pump is likely to cause  

 

damage to the pump.

Direction of rotation

When the pump is ready to be started, switch the 

motor briefly on and off and check that the drive 

motor rotates in the correct direction as indicated by 

the rotation arrow.

Check the direction of rotation by watching the fan 

on the electric motor. 

Fig. 12 Filling the pump before starting

Fig. 13  Direction of rotation

Summary of Contents for Imo Pump D4 BP Series

Page 1: ...identification 2 Installation 3 Start up 8 Trouble shooting 10 Before commencing any work read this instruction carefully Failure to comply with these instructions may cause damage and personal injury...

Page 2: ...P With Valve Y External ball bearing Z Internal ball bearing Com ments Pump name Material pump casing 1 Shaft seal design 1 Moun ting 2 Valve other 3 Design modifi cation 1 Rotor lead 1 Size 1 Also va...

Page 3: ...ctions may cause damage and personal injury Transport and storage The pump shall always be protected against ingress of water and other impurities The pump shall always be stored in a clean dry and wa...

Page 4: ...vided the radial forces are kept within the specified range We recommend that the pump is connected via our standard connecting frame and IMO AB standard coupling The coupling and alignment shall be s...

Page 5: ...p inlet flange does not exceed the suction capability of the pump Make a proper calculation of the suction line includ ing components such as valves strainer pipe bends etc Generally the pressure drop...

Page 6: ...een the strainer and the pump inlet is recom mended to indicate when the strainer needs clean ing Some pumps are equipped with inlet strainers in standard design mesh size 0 5 mm For other pumps strai...

Page 7: ...pplied from IMO AB with an integrated pressure relief valve designed for external overflow The return line from the pressure relief valve should be run back to the tank to limit the temperature rise i...

Page 8: ...f motor possible Open the shut off valves in the inlet and delivery pipes to the full extent Set pump pressure relief valve at the lowest opening pressure The pump is now ready for starting If the suc...

Page 9: ...ust the pump pressure for the rated value of the system If the pump fails to prime do not run it for more than a few seconds Repeat the start procedure a few times at intervals of a few minutes If thi...

Page 10: ...l is too cold or has higher viscosity than anticipated Counter pressure in the dis charge line is too high 1 The pump cannot be primed Connecting and discon necting of electric cables must be done onl...

Page 11: ...nt support of pipe work Wrong alignment Air leakage into the suction line Free air in the liquid or gas cavitation Faulty electrical supply See above Pressure too high Re adjust the pressure relief va...

Page 12: ......

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