Submerged Installation On Auto Coupling; Dry Installation; Submerged Installation, Portable - Grundfos S Serie Notice D'installation Et De Fonctionnement

6.2 Submerged installation on auto coupling

Pumps for permanent installation can be installed on a stationary
auto coupling and operated completely or partially submerged in
the pumped liquid.
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.
Note
Note
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
Note
Note
pipework; these elements should never be used
as a means to align the pipework.
In some installations, a plinth is required beneath
the auto coupling to ensure correct installation of
Note
Note
the pump. This should be considered during the
design of the installation.
1. Drill mounting holes for the guide rail bracket on the inside of
the pit and fasten the guide rail bracket provisionally with two
screws.
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 expansion 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 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 pit.
5. Unscrew the provisionally fastened guide rail bracket.
Insert the expansion dowels into the guide rails. Fasten the
guide rail bracket on the inside of the pit. Tighten the bolts in
the expansion dowels.
6. Clean out debris from the pit before lowering the pump into
the pit.
7. Fit the guide claw to the pump.
8. Slide the guide claw of the pump 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.
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 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 pit. Make sure that the cables are not sharply bent or
pinched.
11. Connect the motor cable and the control cable, if any.
The free end of the cable must not be submerged,
Note
Note
as water may penetrate through the cable into the
motor.
12

6.3 Dry installation

Pumps in dry installation are installed permanently in a pump
room.
The pump motor is enclosed and watertight and will not be
damaged if the installation site is flooded with water.
1. Mark and drill mounting holes in the concrete floor/concrete
foundation.
2. Fit the bracket or base stand to the pump.
3. Fasten the pump with expansion bolts.
4. Check that the pump is vertical/horizontal.
In order to facilitate service on the pump, we recommend to use
isolating valves on either side of the pump.
5. Fit the suction and discharge pipes and isolating valves, if
used, and ensure that the pump is not stressed by the
pipework.
6. 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.
7. Connect the motor cable and the control cable, if any.
We recommend to use a reducer between the
suction pipe and the pump in horizontal
installations. The reducer must be of the
eccentric type and must be installed so that the
Caution
straight edge is pointing upwards. In this way,
the accumulation of air in the suction pipe is
avoided and the risk of disturbance of operation
is eliminated. See fig. 11.
≥ 10"
(0.2 m)
Reducer of the eccentric type
Fig. 11 Eccentric reducer

6.4 Submerged installation, portable

1. Fit the ring stand to the pump suction flange.
2. Fit a 90 ° elbow to the pump discharge port and connect the
discharge pipe/hose.
If a hose is used, make sure that the hose does not buckle and
that the inside diameter matches that of the discharge port.
3. Lower the pump into the liquid by means of a chain secured to
the lifting bracket of the pump. It is recommended to place the
pump on a plane, solid foundation. Make sure that the pump is
hanging from the chain and not the cable.
4. 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.
5. 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.
6. Connect the motor cable and the control cable, if any.