Grundfos LS 100-80-241, Инструкция по эксплуатации

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English (GB)
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12. Disposing of the product
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
The crossed-out wheelie bin symbol on a product
means that it must be disposed of separately from
household waste. When a product marked with this
symbol reaches its end of life, take it to a collection
point designated by the local waste disposal
authorities. The separate collection and recycling of such
products will help protect the environment and human health.
No. Cause Remedy
1
The pump is not primed, lack of priming
liquid, incomplete priming.
Fill the pump and inlet pipe completely with pumped liquid.
2 Loss of priming liquid.
Mend possible leaks in the inlet pipe, joints and fittings. Vent the pump housing to
remove accumulated air.
3 The suction lift or static lift is too high.
Reduce the difference in height between the water reservoir or water supply and
the pump.
4 The outlet pressure is too high.
Make sure that valves in the outlet pipe are fully open.
For parallel operation, this indicates that the outlet pressure is higher than designed
friction losses in the pipes. Review system design and actual pressure developed in
the system with parallel operation.
5 The speed is too low.
Make sure that the motor receives full voltage.
Make sure that the frequency is correct.
Make sure that all phases are connected.
6 Wrong direction of rotation.
Compare the direction of rotation with the directional arrow on the pump housing. If
required, change the direction of rotation by interchanging two phases in the motor.
7 The impeller is completely clogged. Dismantle the pump and clean the impeller.
8 The inlet pipe is partially blocked. Remove any obstructions in the inlet pipe.
9 Air leak in the inlet pipe or flange. Replace or repair the defective pipe section or flange.
10 Air leak in the stuffing box. Clean the flushing pipe. Replace the stuffing box packing rings, if necessary.
11
Cavitation; insufficient NPSH (depending on
installation). Increase the net positive suction head by placing the pump in a lower position.
Pressurise the inlet vessel.
12 The impeller or wear rings are worn.
Replace the impeller and/or wear rings. If necessary, also replace the bearings and
the shaft.
13 Defective packing rings. Replace the packing rings.
14
The non-return valve is too small or partially
obstructed.
Replace or clean the non-return valve.
15
The inlet pipe is not immersed deeply
enough.
Extend the inlet pipe so that the risk of sucking air is eliminated.
16 The impeller diameter is too small.
Check with Grundfos if you can use a larger impeller. If not, reduce the outlet pipe
friction losses. But be careful not to seriously overload the motor.
17 Obstruction in pump housing. Dismantle the pump and remove the obstruction.
18 Air or gases in the liquid.
Remove the gas or air from the pumped liquid.
See 11 above.
19
The actual duty point of the pump lies to the
right of the specified duty point on the pump
curve. The result is lower head, higher flow
and higher power consumption. Install an orifice plate immediately after the outlet flange. The orifice plate will raise
the system characteristic or increase the counterpressure thus increasing the head
and lowering the flow. The size of the orifice plate must be adapted so that the
pressure corresponds to the required duty point.
20
The viscosity or specific gravity of the
pumped liquid is higher than that of water. Use a larger motor. Consult Grundfos for recommended size.
Test the liquid for viscosity and specific gravity.
21 The shaft is bent due to damage.
Check the deflection of the shaft. The total indicator runout must not exceed 0.05
mm.
Possibly replace the shaft.
22 Mechanical failure of bearing and/or impeller.
Check the bearings and the impeller for damage.
Replace the bearings or the impeller, if necessary.
23 Misalignment. Realign the pump and motor.
24 Electrical defects.
Check that the voltage and frequency of the power supply are correct.
Remedy the possible defects in the motor.
Check that the motor is properly cooled.
25 The speed is too high.
Check that the frequency of the power supply corresponds to the frequency stated
on the motor nameplate.
26 The foundation is not rigid enough.
Retighten the anchor bolt nuts. Make sure that the foundation is made according to
the installation and operating instructions.
27
The lubricating oil or grease is dirty or
contaminated. Clean the bearings and bearing housings according to the instructions and
relubricate the bearings.