4.3.3 Column pipe installation
For this installation type, pumps are installed
permanently in a column pipe. Grundfos does not
supply the column pipe. For column-pipe dimensions,
see the pump-specific dimensional drawings.
TM046899
Submerged installation in column pipe, installation
type ST
Proceed as follows:
1. Fit the seat ring to the bottom of the column pipe.
2. Clean out debris from the pit.
3. Before lowering the pump into the column pipe,
make sure the cables are not damaged.
4. Lower the pump into the column pipe by a
certified chain secured to the lifting bracket. The
pump lays on the conical surface of the seat ring.
The friction between the conical surfaces prevents
the pump from rotating. As an additional
precaution, there are three guide pins on the seat
ring which limit the possible rotation to a
maximum of 60°.
5. Hang up the end of the chain above or at the top
of the column pipe, so the chain cannot come into
contact with the pump.
6. Adjust the length of the cables, but make sure to
have enough cable length to make service on the
pump. Make sure that the cables are not sharply
bent or pinched. Fix the cables and make sure
there is no extra slack inside the column pipe. In
case of long column pipes, it may be necessary to
arrange cable support for the cables inside the
column pipe. For further information, contact
Grundfos.
7. Connect the power- and control cables.
a
b
c
TM046908
Column pipe installation, pump type ST
Pos.
Description
b
72 and 74: 900 mm
78: 1100 mm
c
All: 400 mm
21
English (GB)
Summary of Contents for ST-55-520
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