Free-Standing Submerged Installation - Grundfos DP 10.50 Original Installation And Operating Instructions

8. Slide the guide claw between the guide rails and
lower the pump into the tank 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.
9. 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.
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 tank.
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
submerged as water may penetrate
Note
through the cable into the motor.
Hookup auto-coupling system
See fig. C, page 506.
Proceed as follows:
1. Fit the crossbar in the tank.
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 tank before lowering
the pump.
6. Lower the pump into the tank 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 tank 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 tank.
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
submerged as water may penetrate
Note
through the cable into the motor.
16

7.2 Free-standing submerged installation

Pumps for free-standing submerged installation can
stand freely on the bottom of the tank or the like.
See fig. D, page 507, and fig. E, page 508.
In order to facilitate service on the pump, fit a flexible
union or coupling to the elbow on the discharge line
for easy separation.
If a hose is used, make sure that the hose does not
buckle and that the inside diameter of the hose
matches that of the discharge port.
If a rigid pipe is used, fit the union or coupling,
non-return valve and isolating valve in the order
mentioned, when viewed from the pump.
If the pump is installed in muddy conditions or on
uneven ground, we recommend to support the pump
on bricks or a similar support.
Proceed as follows:
1. Fit a 90 ° elbow to the pump discharge port and
connect the discharge pipe/hose.
2. Lower the pump into the liquid by means of a
chain secured to the lifting bracket of the pump.
We recommend to place the pump on a plane,
solid foundation. Make sure that the pump is
hanging from the chain and not the cable.
3. 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.
4. 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. Make sure that the cables are
not sharply bent or pinched.
5. Connect the motor cable and the monitoring
cable, if any.
The free end of the cable must not be
submerged as water may penetrate
Note
through the cable into the motor.