GRUNDFOS EF12 (01) PDF MANUAL

GRUNDFOS EF12 (01) PDF SUMMARY:

What do the hazard statements indicate?

DANGER Indicates a hazardous situation which, if not avoided, will result in death or serious personal injury.

WARNING Indicates a hazardous situation which, if not avoided, could result in death or serious personal injury.

CAUTION Indicates a hazardous situation which, if not avoided, could result in minor or moderate personal injury.

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What does a blue or grey circle with a white graphical symbol indicate?

That an action must be taken.

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What does a red or grey circle with a diagonal bar, possibly with a black graphical symbol, indicate?

That an action must not be taken or must be stopped.

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What may happen if the provided instructions are not observed?

It may result in malfunction or damage to the equipment.

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What should you do if the motor does not start, and the trip blows or the motor-protective circuit breaker trips out immediately?

• Have the power cable and motor checked and repaired by a qualified electrician.

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What should you do if the fuses blow due to the use of incorrect fuses?

Install the correct fuses.

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What should you do if the impeller is blocked by impurities?

Clean the impeller.

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What should you do if the air bells, the float switches, or the electrodes are out of adjustment or defective?

Readjust or replace the air bells, float switches, or electrodes.

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What should you do if the pump operates, but the motor-protective circuit breaker trips after a short time?

• Set the relay in accordance with the specifications on the nameplate.

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What should you do if there is increased current consumption due to large voltage drop?

• Measure the voltage between two motor phases.
• Tolerance: -10 %, +6 %.
• Re-establish the correct voltage supply.

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What should you do if the impeller clearance is incorrect?

Readjust the impeller.

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What should you do if the thermal switch trips after the pump is running for some time?

• Reduce the liquid temperature.

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What should you do if the liquid viscosity is too high?

Dilute the liquid.

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What should you do if there is a wrong electrical connection?

Check and correct the electrical installation.

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What should you do if the pump operates at below-standard performance and power consumption?

Clean the impeller.

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What should you do if the direction of rotation is wrong?

Check the direction of rotation. If it is incorrect, interchange two phases in the power cable.

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What should you do if the pump operates but delivers no liquid?

• Check the outlet valve and open or clean it, if necessary.

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What should you do if the non-return valve is blocked?

Clean the non-return valve.

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What should you do if there is air in the pump?

Vent the pump.

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What should you do if there is high-power consumption (SLV)?

Check the direction of rotation and interchange any two of the phases in the incoming supply cable.

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What should you do if there is noisy operation and excessive vibrations (SL1)?

Check the direction of rotation and interchange any two of the phases in the incoming supply cable.

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What should you do to install the product mechanically?

• Make sure the pit bottom is even before installing the product.

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What should you do when installing on auto coupling using the guide-rail system?

1. Drill mounting holes for the guide-rail bracket on the inside of the pit and fasten the guide-rail bracket with two anchor bolts.
2. Place the auto-coupling base unit on the bottom of the pit. Use a plumb line to establish the correct positioning. Fasten the auto coupling with anchor bolts. If the bottom of the pit is uneven, the auto-coupling base unit must be supported so that it is level when fastened.
3. Assemble the outlet line in accordance with the generally accepted procedures and without exposing the line to distortion or tension.
4. Insert the guide rails in the auto-coupling base unit and adjust the length of the rails accurately to the guide-rail bracket at the top of the pit.
5. Unscrew the provisionally fastened guide-rail bracket, fit it on top of the guide rails and finally fasten it firmly to the pit wall.
6. Before lowering the pump, clean out debris from the pit.
7. Fit the guide claw to the pump outlet. Grease the gasket of the guide claw before lowering the pump into the pit.
8. Slide the guide claw between the guide rails and lower the pump into the pit by a chain secured to the lifting bracket.
9. Hang up the end of the chain on a suitable hook at the top of the pit so the chain cannot come into contact with the pump housing. Make sure that the chain is straight but not strained.
10. Adjust the length of the power cable by coiling it up on a relief fitting to ensure that the cable is not damaged during operation. Fasten the relief fitting to a suitable hook at the top of the pit. Make sure that the cables are not sharply bent or pinched.
11. Connect the power- and control cables, if any.

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What should you do when installing on auto coupling using the hookup system?

1. Fit the crossbar in the pit.
2. Fit the stationary part of the auto coupling on top of the crossbar.
3. Fit the adapted piece of pipe for the movable part of the hookup auto coupling to the pump outlet.
4. Fasten a shackle and a chain to the movable part of the hookup auto coupling.
5. Clean out debris from the pit before lowering the pump.
6. Lower the pump into the pit by the chain secured to the lifting bracket. When the movable part of the auto coupling reaches the stationary part, the two connect automatically.
7. Hang up the end of the chain on a suitable hook at the top of the pit so the chain cannot come into contact with the pump housing.
8. Adjust the length of the power cable by coiling it up on a relief fitting to ensure that the cable is not damaged during operation. Fasten the relief fitting to a suitable hook at the top of the pit. Ensure that the coiled cable cannot fall into the pit. Make sure that the cables are not sharply bent or pinched.
9. Connect the power- and control cables, if any.

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What should you do for free-standing submerged installation?

1. Fit a 90° elbow to the pump outlet and connect the outlet pipe or hose.
2. Lower the pump into the liquid by a chain secured to the lifting bracket. Place the pump on a plain, solid foundation. Make sure that the pump is lifted by the chain and not the power cable.
3. Hang up the end of the chain on a suitable hook at the top of the pit so the chain cannot come into contact with the pump housing.
4. Adjust the length of the power cable by coiling it up on a relief fitting to ensure that the cable is not damaged during operation. Fasten the relief fitting to a suitable hook at the top of the pit. Make sure that the cables are not sharply bent or pinched.
5. Connect the power- and the control cables, if any.

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What should you do to make an electrical connection?

• Connect the pump to an external main switch which ensures all-pole disconnection with a contact separation according to IEC 60204-1.
• It must be possible to lock the main switch in position 0. Type and requirements as specified in IEC 60204-1.
• Connect the pumps to a control unit with a motor protection relay with IEC trip class 10 or 15.
• The permanent installation must be fitted with an earth-leakage circuit breaker.
• Make sure there is at least 10 ft (3 m) free cable above the maximum liquid level.
• Set the motor-protective circuit breaker to the rated current of the pump. The rated current is stated on the nameplate.
• Make sure that the pump is connected according to these installation and operating instructions.

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What should you do before starting the product?

• Make sure that the fuses are removed.
• Make sure that all protective equipment is connected correctly.

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What are the steps to checking the direction of rotation?

Procedure 1:

1. Start the pump and measure the liquid quantity or the outlet pressure.
2. Stop the pump and interchange any two of the phases in the power cable.
3. Restart the pump and measure the liquid quantity or the outlet pressure.
4. Stop the pump.
5. Compare the results taken under points 1 and 3. The connection which gives the larger liquid quantity or the higher pressure is the correct direction of rotation.

Procedure 2:

1. Let the pump hang from a lifting device, such as the hoist used for lowering the pump into the pit.
2. Start and stop the pump while observing the movement (jerk) of the pump.
3. If connected correctly, the pump jerks counterclockwise.
4. If the direction of rotation is wrong, interchange two of the phases in the power cable.

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What steps do you take when starting up the product?

1. Remove the fuses and check that the impeller can rotate freely. Turn the impeller by hand.
2. Check the condition of the oil in the oil chamber.
3. Check that the monitoring units, if used, are operating satisfactorily and appropriately.
4. Check the setting of the air bells, float switches, or electrodes.
5. Open the isolating valves, if fitted. Auto coupling: It is important to grease the gasket of the guide claw before lowering the pump into the pit.
6. Lower the pump into the liquid and insert the fuses. Auto coupling: Check that the pump is in the right position on the auto-coupling base unit.
7. Check if the system is filled with liquid and vented. The pump is self-venting.
8. Switch on the power supply to the pump. When the power is on, the pump starts and pumps down to the dry-running level. This process can be used to check that the pump functions correctly.

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How do you reset the pump?

To reset the pump, switch off the power supply for a minute, and switch it on again.

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What points should be checked in the maintenance schedule?

• Power consumption
• Oil level and condition
• Cable entry
• Pump parts
• Ball bearings
• Cable handling

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How do you drain the oil?

1. Loosen and remove both oil screws to allow all the oil to drain from the chamber.
2. Check the oil for water and impurities. If the shaft seal is removed, the oil indicates the condition of the shaft seal.

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How do you fill oil with the pump in a horizontal position?

1. Place the pump horizontally on the stator housing and make sure the outlet flange and the oil screws are pointing upwards.
2. Fill oil into the oil chamber through the upper hole until it starts running out of the lower hole. The oil level is now correct.
3. Fit both oil screws using the gaskets included in the O-ring service kit.

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How do you fill oil with the pump in a vertical position?

1. Place the pump on a plain, horizontal surface.
2. Fill oil into the oil chamber through hole Nr. 1 until it starts running out from the other hole on the side (Nr. 2).
3. Fit both oil screws using the gaskets included in the O-ring service kit.

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How do you adjust the impeller clearance for SL1 pumps?

1. Undo the locking screws.
2. Undo the adjusting screws and push the wear plate until it touches the impeller.
3. Tighten the adjusting screws so that the wear plate still touches the impeller. Then loosen all the adjusting screws for about half a turn.
4. Tighten the locking screws.
5. Rotate the impeller by hand to check that it is not touching the wear plate.

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How do you clean the pump housing?

Dismantling

1. Place the pump in a vertical position.
2. Loosen and remove the clamp fastening the pump housing to the motor.
3. Lift the motor out of the pump housing . As the impeller is fastened to the shaft end, the impeller is removed together with the motor.
4. Clean the pump housing and the impeller.

Assembly

1. Place the motor with the impeller in the pump housing.
2. Fit and tighten the clamp.

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How do you check or replace the shaft seal?

1. Loosen and remove the clamp fastening the pump housing to the motor.
2. Lift the motor out of the pump housing. As the impeller is fastened to the shaft end, the impeller is removed together with the motor.
3. Remove the screw from the shaft end.
4. Remove the impeller from the shaft.
5. Drain the oil from the oil chamber. The shaft seal is a complete unit for all pumps.
6. Remove the screws securing the shaft seal.
7. Lift the shaft seal out of the oil chamber using the lever principle using the two dismounting holes in the shaft seal carrier and two screwdrivers.
8. Check the condition of the bush where the secondary seal of the shaft seal touches the bush. The bush must be intact.
9. Check and clean the oil chamber.
10. Lubricate the faces in contact with the shaft seal with oil.
11. Insert the new shaft seal using the plastic bush included in the kit.
12. Tighten the screws securing the shaft seal to 16 Nm.
13. Fit the impeller. Make sure that the key is fitted correctly.
14. Fit and tighten the screw securing the impeller to 22 Nm.
15. Place the motor with the impeller in the pump housing.
16. Fit and tighten the clamp.
17. Fill the oil chamber with oil.