Installation On Auto Coupling - Grundfos SEG Series Instructions Manual

7.1 Installation on auto coupling

Pumps for permanent installation can be mounted on
a stationary auto-coupling guide rail system or a
hookup auto-coupling system.
Both auto-coupling systems facilitate maintenance
and service as the pump can easily be lifted out of
the pit.
Warning
Before beginning installation procedures,
FM
make sure that the atmosphere in the pit is
not potentially explosive.
Make sure that the pipework is installed
without the use of undue force. No loads
from the pipework weight must be carried
Note
by the pump. We recommend the use of
loose flanges to ease the installation and
to avoid pipe tension at flanges and bolts.
Do not use elastic elements or bellows in
Note
the pipework; these elements should never
be used as a means to align the pipework.
Auto-coupling guide rail system
Proceed as follows:
1. Drill mounting holes for the guide rail bracket on
the inside of the pit and fasten the guide rail
bracket provisionally with two 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
heavy-duty expansion bolts. If the bottom of the
pit is uneven, the auto-coupling base unit must
be supported so that it is level when being
fastened.
3. Assemble the discharge pipe in accordance with
the generally accepted procedures and without
exposing the it 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.
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.
The guide rails must not have any axial
Note
play as this would cause noise during
pump operation.
6. Clean out debris from the pit before lowering the
pump into the pit.
7. Fit the guide claw to the discharge port of the
pump.
8. Slide the guide claw down the guide rails and
lower the pump into the pit by means of a chain
fastened to the lifting bracket. When the pump
reaches the auto-coupling base unit, the pump
will automatically connect tightly.
Warning
Grease the gasket of the guide claw before
lowering the pump into the pit.
Note
When the pump has reached the auto-
coupling base unit, shake the pump by
means of the chain to make sure that it is
placed in the correct position.
9. 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
housing.
10. Adjust the length of the motor 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 motor cable and the monitoring
cable, if any.
The free end of the cable must not be
Note
submerged as water may penetrate
through the cable into the motor.
Hookup auto coupling
Proceed as follows:
1. Fit a 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
discharge port.
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 means of the
chain secured to the lifting bracket. When the
movable part of the auto coupling reaches the
stationary part, the two will automatically connect
tightly.
7. 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
housing.
8. Adjust the length of the motor 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.
9. Connect the motor cable and the monitoring
cable, if any.
The free end of the cable must not be
Note
submerged as water may penetrate
through the cable into the motor.
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