Submerged Installation On Auto-Coupling; Free-Standing Submerged Installation On Ring Stand - Grundfos SL1 Installation And Operating Instructions Manual

8.1 Submerged installation on auto-coupling

Submerged installation on auto coupling
Fig. 4
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. 5.
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
Caution
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.
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 this
Note
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.
8
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, as
Note
water may penetrate into the cable.
8.2 Free-standing submerged installation on ring
stand
Free-standing submerged installation on a ring stand
Fig. 5
Pumps for free-standing submerged installation can stand freely
on the bottom of the tank. The pump must be installed on a ring
stand. See fig. 5.
The ring stand is available as an accessory.
In order to facilitate service on the pump, fit a flexible union or
coupling to the elbow on the discharge port 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 pump
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,
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 that you place
the pump on a plane, solid foundation. Make sure that the
pump is hanging from the chain and not the cable. Make sure
that the pump is standing securely.
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 at the top
of the tank. Make sure that the cable is not sharply bent or
pinched.
5. Connect the motor cable.
The free end of the cable must not be submerged, as
Note
water may penetrate into the cable.