Submerged Installation On Auto-Coupling - Grundfos SL1 Serie Instructions D'installation Et D'utilisation

7.1 Submerged installation on auto-coupling

Pumps for permanent installation can be installed on a stationary
auto-coupling guide rail system. The auto-coupling system
facilitates maintenance and service as the pump can easily be
lifted out of the tank. See fig. 4.
Warning
FM
Before beginning installation procedures, make
sure that the atmosphere in the tank 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 by the pump.
Caution
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 the
Caution pipework; these elements should never be used
as a means to align the pipework.
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 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 pipe in accordance with the generally
accepted procedures and without exposing the pipe to
distortion or tension.
4. Place the guide rails on the auto-coupling base unit and adjust
the length of the rails accurately to the guide rail bracket at
the top of the tank.
5. Unscrew the provisionally fastened guide rail bracket. Insert
the upper guide rail bracket into the guide rails. Fasten the
guide rail bracket on the inside of the tank.
The guide rails must not have any axial play as
Note
this would cause noise during pump operation.
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.
8. Slide the guide claw of the pump 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.
The free end of the cable must not be submerged,
Note
as water may penetrate into the cable.
12
Fig. 4 Submerged installation on auto coupling