Elektro Maschinen 35014500750, Operating Instructions Manual, Page: 11 / 44

2. Lower pump to the bottom of the
fluid container. Use a strong rope,
fastened to the cable eye, to lower
the pump.
The pump can also be operated
when suspended by a rope.
6.1 Switching ON and OFF
After connection to the mains, the sub-
mersible pump is automatically switched
ON and OFF by the float switch:
x It starts pumping when the fluid has
lifted the float switch fully
(8) .
x The pump switches OFF when the
float switch has fallen down
(9) .
The cable for the float switch can be
moved in the cable holder
(10) to adjust
the distance between the switching ON
and OFF positions:
x Float switch on a "short cable": the
On and OFF positions are close
together.
x Float switch on a "long cable": the
On and OFF positions are wide
apart.
A
Caution!
The float switch must be able
to move in such way that the pump
can not run dry.
6.2 Pump characteristic
curve
The pump characteristic curve shows
which pump capacity is possible in
dependance on the delivery head.
A
Danger!
Prior to all servicing:
Switch Off.
Unplug.
Service and repair work other than
described here must be left to quali-
fied specialists.
7.1 Periodic 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.
Impeller cleaning
1. Remove bottom part of submersible
pump as illustrated.
A
Caution!
Loosen only the six hexagon
socket head cap screws to remove the
bottom part.
Do not
loosen the six Torx screws ,
doing so will cause oil to leak from the
pump!
2. Clean impeller and all accessible
inside surface of the casing.
Remove any fibres which may have
wound around the impeller shaft.
Remove persistant soiling with
brush and dishwashing liquid.
3. Reassemble pump.
7.2 Pump storage
A
Caution!
Frost damages the pump and
accessories, as both always contain
water!
x
When there is danger of freezing
remove pump and accessories and
store at a frost-proof location.
A
Danger!
Prior to all servicing:
Switch Off.
Unplug.
8.1 Fault finding
Pump does not run:
x No mains voltage.
Check cables, plug, outlet and
mains fuse.
x
Mains voltage too low.
Use only extension cables with
sufficient lead cross section (see
"Technical Specifications").
x 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.
x 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:
x Pump blocked by foreign object.
Clean pump.
Pump does not pump properly:
x
Delivery head too high.
Observe max. delivery head (see
"Technical Specifications").
x Discharge hose kinked.
Straighten discharge hose.
x Discharge hose leaky.
Seal discharge hose, tighten
screw fittings.
Pump runs very noisily:
x Pump primes air.
Ensure there is a sufficient water
supply.
Adjust float switch correctly.
Hold pump at an angle when sub-
merging.
6. Operation
10
8
9
7. Care and Maintenance
8. Trouble Shooting
EN
H(m)
14500DN
15000DR
11,5
15500DR
10
9
8,5
5
0
l / h
0
5000 10000
Q (m
3
/h)
14450
14850 15350