ENGLISH
6. Operation
6.1Switching ON and OFF
After connection to the mains, the submersible pump is automatically switched ON and OFF by the float switch:
∙It starts pumping when the fluid has lifted the float switch fully (10).
∙The pump switches OFF when the float switch has fallen down (11).
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The cable for the float switch can be moved in the cable holder (12) to adjust the distance between the switching ON and OFF positions:
∙Float switch on a "short cable": the On and OFF positions are close together.
∙Float switch on a "long cable": the On and OFF positions are wide apart.
Caution!
The float switch must be able
to move in such way that the pump can not run dry.
6.2Pump characteristic curve
The pump characteristic curve shows which pump capacity is possible in dependance on the delivery head.
m |
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7 |
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6 |
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5 |
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4 |
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3 |
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2 |
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1 |
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0 |
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| l / h |
0 | 2500 | 5000 | 7000 |
7.Care and Maintenance
Danger!Prior to all servicing:
−Switch Off.
−Unplug.
Service and repair work other than described here must be left to qualified specialists.
7.1Periodic maintenance
For the pump to function perfectly at any time periodic maintenance is required. This also applies if the pump is used under heavy conditions, but does not run for extended periods of time (e.g. when used in well drains):
Yearly service
1.Check pump casing, cables and float switch for damage.
2.Rinse pump with clear water. Remove persistant soiling, e.g. algae desposits, with brush and dishwashing liquid.
3.To flush the inside of the pump, place it into a container filled with clear water and switch ON briefly.
Cleaning the strainer
1.Remove strainer base by spreading the clips.
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2.Clean all accessible inside surfaces of the casing. Remove any fibres, which may have wound around the impeller shaft, through the discharge port opening (13). Remove persist- ant soiling with brush and dishwash- ing liquid.
3.Reassemble pump.
7.2Pump storage
Caution!
Frost damages the pump and
accessories, as both always contain water!
∙When there is danger of freezing remove pump and accessories and store at a
8.Trouble Shooting
Danger!Prior to all servicing:
−Switch Off.
−Unplug.
8.1Fault finding
Pump does not run:
∙No mains voltage.
−Check cables, plug, outlet and mains fuse.
∙Mains voltage too low.
−Use only extension cables with sufficient lead cross section (see "Technical Specifications").
∙Motor overheated, motor protection relay tripped.
−Remove cause for overheating (fluid pumped too hot? Pump blocked by foreign objects?)
−After cooling off the pump will switch ON again.
∙Float switch does not switch the pump ON.
−Ensure there is a sufficient water supply.
−Make sure the float switch can move unrestricted.
Motor hums but does not start:
∙Pump blocked by foreign object. − Clean pump.
Pump does not pump properly:
∙Delivery head too high.
−Observe max. delivery head (see "Technical Specifications").
∙Discharge hose kinked.
−Straighten discharge hose.
∙Discharge hose leaky.
−Seal discharge hose, tighten screw fittings.
Pump runs very noisily:
∙Pump primes air.
−Ensure there is a sufficient water supply.
−Adjust float switch correctly.
−Hold pump at an angle when sub- merging.
Pump runs continuously:
∙Float switch does not reach lower position.
−Make sure the float switch can move unrestricted.
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