English (GB)
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3.1.4 Submerged installation on auto coupling
Pumps for permanent installation can be installed on a stationary
auto coupling and operated completely or partially submerged in
the pumped liquid.
Before installing the auto-coupling base unit, ensure the quality
and strength of the concrete foundation. See the pull-out
strengths required for anchor bolts in the table at the end of this
section. To ensure adequate pull-out strength, we recommend
that you weld the threaded bushings to the steel reinforcement in
the concrete.
1. Drill mounting holes for the guide rail bracket on the inside of
the pit and fasten the guide rail bracket provisionally with two
anchor screws.
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, support the auto-coupling base unit so that it is level
when being fastened.
3. Connect the outlet pipe in accordance with the generally
accepted procedures and without exposing the pipe to
distortion or tension. Do not allow loads from the weight of the
pipes to be carried by the auto coupling.
4. Fit the guide rails. An intermediate guide rail bracket is
required if guide rails are more than 6 m long. Place the guide
rails on the auto coupling, then place the guide rail bracket on
the guide rails and fasten the guide rail bracket to the pit wall.
Tighten the anchor bolts.
5. Clean out debris from the pit before lowering the pump into
the pit.
6. Before lowering the pump into wet pit, check the cables
visually for cuts or ruptures which may have been caused by
rough handling during transportation or installation.
7. Slide the guide claw of the pump between the guide rails and
lower the pump into the pit by means of a certified chain
secured to the lifting bracket of the pump. When the pump
reaches the auto-coupling base unit, the pump will
automatically connect tightly.
8. Hang up the end of the chain on a suitable hook at the top of
the pit and in such a way that the chain cannot come into
contact with the pump.
9. Adjust the length of the motor cables, but remember to have
enough cable length to be able to make service on the pump.
Make sure that the cables are not sharply bent or pinched. Fix
the cables at the top of the pit in such a way that no extra
cable slides into the pit.
10. Connect the motor cables and the sensor cable.
Pull-out strengths for anchor bolts
* Pump outlet DN 125 and base plate outlet DN 150.
3.1.5 Submerged installation, portable
1. Fit the ring stand to the pump inlet flange.
2. Fit a 90 ° elbow to the pump outlet port and connect the outlet
pipe or hose.
If a hose is used, make sure that the hose does not buckle
and that the inside diameter matches that of the outlet port.
3. Lower the pump into the liquid by means of a chain secured to
the lifting bracket of the pump. We recommend that you place
the pump on a plane, solid foundation. Make sure that the
pump is hanging from the chain and not the cables.
4. Hang up the end of the chain on a suitable hook at the top of
the pit and in such a way that the chain cannot come into
contact with the pump.
5. Adjust the length of the motor cables by coiling them up on a
relief fitting to ensure that the cables are not damaged during
operation. Fasten the relief fitting to a suitable hook. Make
sure that the cables are not sharply bent or pinched.
6. Connect the motor cables and the control cable, if any.
For auto-coupling installations,
types S and C, including DN 250
and upwards, the guide claw is
mounted on the outlet flange from
factory.
Avoid pipe tension at flanges and
bolts.
The free end of the cables must
not be submerged, as water may
penetrate through the cables into
the motor.
Auto-
coupling
base unit
Bolts
Pull-out strength
[kN]
DN 100
4 x M16
5
DN 125/150*
8
DN 200
4 x M24
16
DN 250
30
DN 300
40
DN 500
6 x M30
40
DN 600
40
The pull-out strengths are stated
without safety factor. The
required safety factor may
depend on the materials and the
methods used for anchoring.