15
8.1 Installation on auto coupling
DP 10.65.26 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 tank.
DP 10.65.26 pumps have a cast DN 65, PN 10
discharge flange.
Auto-coupling guide rail system
, see fig. B,
page 533.
Proceed as follows:
1. Drill mounting holes for the guide rail bracket on
the inside of the tank, and fasten the guide rail
bracket provisionally with two screws.
2. Place the auto-coupling base unit on the bottom
of the tank. Use a plumb line to establish the
correct positioning. Fasten the auto coupling with
heavy-duty expansion bolts. If the bottom of the
tank is uneven, the auto-coupling base unit must
be supported so that it is level when being
fastened.
3. Assemble the discharge 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.
5. Unscrew the provisionally fastened guide rail
bracket, fit it on top of the guide rails, and finally
fasten it firmly to the tank wall.
6. Clean out debris from the tank before lowering
the pump into the tank.
7. Fit the guide claw to the discharge port of the
pump. Then slide the guide claw down the guide
rails, and lower the pump into the tank by means
of a chain secured to the pump lifting bracket.
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 tank and in such a way that the
chain cannot come into contact with the pump
housing.
9. 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 tank.
Make sure that the cables are not sharply bent or
pinched.
10. Connect the motor cable and the monitoring
cable, if any.
Warning
Do not put your hands or any tool into
the pump suction or discharge port
after the pump has been connected to
the power supply, unless the pump has
been switched off by removing the
fuses or switching off the mains switch.
It must be ensured that the power
supply cannot be accidentally switched
on.
Warning
Only use the lifting bracket for lifting
the pump. Do not use it to hold the
pump when in operation.
Note
We recommend always to use Grundfos
accessories to avoid malfunction due
to incorrect installation.
Note
The pumps are designed for
intermittent operation.
When completely submerged in the
pumped liquid, the pumps can also
operate continuously.
See section 11.2 Operating modes.
Warning
Before beginning installation
procedures, make sure that the
atmosphere in the tank is not
potentially explosive.
Caution
Make sure that the pipework is installed
without the use of undue force. No
loads from the pipework weight must
be carried by the pump. We recommend
the use of loose flanges to ease the
installation and to avoid pipe tension at
flanges and bolts.
Caution
Do not use elastic elements or bellows
in the pipework. Never use these
elements as a means to align the
pipework.
Note
The guide rails must not have any axial
play as this would cause noise during
pump operation.
