Grundfos DP 10 Installation And Operating Instructions Manual page 8

3.1.2 Installation on auto coupling
Pumps for permanent installation can be installed 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.
DP 10.65.26 pumps have a cast iron DN 65, PN 10
outlet flange and cannot be installed on a "hookup"
auto coupling.
Before beginning installation procedures,
make sure that the atmosphere in the pit is
not potentially explosive.
We recommend that you use loose flanges to ease
the installation and to avoid pipe tension at flanges
and bolts.
Make sure that the pipes are installed
without the use of undue force. No loads
from the weight of the pipes must be
carried by the pump.
Do not use elastic elements or bellows in
the pipes. Never use these elements as a
means to align the pipes.
Auto-coupling guide rail system
See fig. A in Appendix.
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 anchor bolts.
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 anchor 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 outlet line in accordance with the
generally accepted procedures and without
exposing the line 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 at the top of the pit.
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
play as this would cause noise during
pump operation.
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6. Clean out debris from the pit before lowering the
pump into the pit.
7. Fit the guide claw to the pump outlet. Grease the
gasket of the guide claw before lowering the
pump into the pit.
8. Slide the guide claw between the guide rails and
lower the pump into the pit by means of a chain
secured to the lifting bracket of the pump. When
the pump reaches the auto-coupling base unit,
the pump will automatically connect tightly.
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 power 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 power cable and the control cable, if
any.
The free end of the cable must not be
submerged as water may penetrate
through the cable into the motor.
Hookup auto-coupling system
See fig. B in Appendix.
Proceed as follows:
1. Fit the 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 outlet.
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 of the pump.
When the movable part of the auto coupling
reaches the stationary part, the two will
automatically connect tightly.
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.