Submerged Installation On Auto Coupling - Grundfos SE Instrucciones De Instalación Y Funcionamiento

4.1.3 Submerged installation on auto coupling

Pumps for permanent, vertical installation in a pit can be installed
on a stationary auto coupling and operated completely or partially
submerged in the pumped liquid.
Make sure that the pipes are installed without the use
of undue force. No loads from the weight of the pipes
must be carried by the pump. We recommend that
you use loose flanges to ease the installation and to
avoid pipe tension at the flanges.
Do not use elastic elements or bellows in the pipes;
these elements must never be used as a means to
align the pipes.
In some installations, a plinth is required beneath the
auto coupling to ensure correct installation of the
pump. Consider this during the design of the
installation.
Proceed as follows:
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. Connect the outlet 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 holes. Fasten the guide rail
bracket on the inside of the pit. Tighten the screws in the
expansion dowels.
The guide rails must not have any axial play as this
will cause noise during pump operation.
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 power 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 cable is not sharply bent or
pinched.
11. Connect the power cable and the control cable, if any.
The free end of the cable must not be submerged as
water may penetrate through the cable into the
motor.
Pull-out strength for anchor bolts
Auto-coupling base Bolts
unit [in (mm)]
A30/A40 (DN 80/100) 4 x 5/8" (M16)
A40 (DN 100) 4 x 5/8" (M16)
A60 (DN 150) 4 x 5/8" (M16)
A80 (DN 200) 4 x 1" (M24)
A100 (DN 250) 4 x 1" (M24)
A120 (DN 300) 4 x 1" (M24)
The pull-out strengths stated are without safety
factor. The required safety factor may depend on the
materials and method used for anchoring.
4.1.4 Permanent, vertical or horizontal, dry installation in a
pump room
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.
Proceed as follows:
1. Mark and drill mounting holes in the concrete floor or 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 that you use isolating valves on either
side of the pump.
5. Fit the inlet and outlet pipes and isolating valves, if used, and
ensure that the pump is not stressed by the pipes.
6. Adjust the length of the power 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 cable is not sharply bent or pinched.
7. Connect the power cable and the control cable, if any.
Pull-out strength for anchor bolts
Installation types
Bolts
D and H
- -
The pull-out strengths stated are without safety
factor. The required safety factor may depend on the
materials and method used for anchoring.
Pull-out strength for a
single bolt
[kip (kN)]
2.25 (10)
2.25 (10)
2.25 (10)
2.25 (10)
2.25 (10)
2.70 (12)
Pull-out strength for a
single bolt
[kip (kN)]
1.13 (5.0)
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