Eng
lish (US)
8
7. Installation
The separate nameplate supplied with the pump should be
affixed at the installation site.
All safety regulations must be observed at the installation site, for
instance the use of blowers for fresh air supply to the pit.
7.1 Cable protection
If the pump is not going to be installed immediately, the open end
of the power supply cable or sensor cables must be protected
from moisture which could otherwise penetrate the motor
windings. This should be done as soon as the pump is delivered.
Protection can be carried out by fitting a cable cap or by wrapping
the open end of the cable in plastic and taping over the plastic
with strong waterproof tape.
If the pump system is configured for side discharge, locate the
pump and column pipe cover so that the cable is 180 ° away from
the discharge.
7.2 Installation procedure
The pump is installed in the stationary column pipe.
The pump operates completely submerged in the discharge flow
and does not require any additional protection.
In addition to the pump, the following items are required:
• Column pipe with bottom locating plate, called seat ring, with
integrated anti-rotation bracket on which the pump stands.
• Cable suspension system for securing the cable and
regulating the height of the level sensors.
• The seat ring can be supplied with the pump as an installation
accessory. Please contact Grundfos for details.
Take particular care when installing the KPL or KWM pumps, as
the procedure is not similar to that of other submersible pumps.
Make sure that the pump is aligned with the anti-rotation brackets
and in such a way that pump rotation is prevented when the
impeller is running.
The installation should be carried out by qualified personnel
experienced in the installation of this type of pump.
The pump must be installed in compliance with this manual.
For installation dimensional requirements and pump dimensional
data, see section
1. Measure the column pipe diameter (
∅
D)
and find the
minimum height of the dimension (C) in the table below.
Compare the dimension (C) with the actual measurement.
The measured values must not be lower that the value in the
table.The anchor bolts should be installed prior to concrete
pouring as part of the construction works. If this is not done,
then mark out and install the anchor bolts during the
installation of the column pipe.
2. Installing the column pipe:
– Slowly lower the column pipe into the pit using overhead
lifting equipment.
– Make sure that the column pipe is vertical and rests securely
on the concrete.
– Tighten the anchor bolt nuts to ensure that the column pipe
cannot move.
Fig. 8
Position of anchor bolt
3. Installing the pump:
– Make sure that the sealing O-ring is clean and located in the
groove on the bottom of the pump housing. The O-ring seals
between the pump housing and seat ring, preventing
backflow.
– Slowly lower the pump into the column pipe using the
overhead lifting equipment, if necessary. If lack of lifting
height above column pipe, use an intermediate lifting ring,
see fig 9. Carefully guide the pump into position at the
bottom of the column pipe so that the pump does not tilt in
any way on the stop vanes at the bottom of the column. Lift
the pump approximately 1 in. (26 mm) and turn it counter-
clockwise until the anti-rotation brackets touch the nearest
adjacent stop vanes.
– The pump is secured by its own weight and the anti-rotation
brackets. No additional fixing is required.
4. Cable suspension system in the column pipe:
– It is important to fix the cables properly and according to
these instructions in order to avoid damage to the cables
during operation.
– Clamp wire rope and all cables together at distances of
20 in. (508 mm) between the clamps adapted to weight of
the cable. See fig. 9, cable clamps distance. Fasten the wire
rope onto the eye at the top of the column pipe. Adjust the
turnbuckle between the wire rope and the eye of the beam.
Make sure that there is no slack in the cable suspension
and that the cable is fastened and unable to swing.
– Lead the cables through the cable bushing of the column
pipe top cover.
– Run the cables to the external terminal box. Make sure that
the cable bushing is fitted correctly and prevents water
leakage.
5. Fit the column pipe top cover on the upper part of the column
pipe using a waterproof gasket, and tighten the bolts.
Make sure that the cover prevents water leakage.
Warning
Before starting the installation, switch off the
power supply and lock the mains switch in
the 0/Off position.
Any external voltage connected to the pump
must be switched off before working on the
pump.
Note
Note
Prior to installation, check the oil level in the oil
chamber. See section 13.2.1 Oil level and oil
condition.
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M
05
53
07
36
1
2
Warning
Do not put your hands or any tool into the pump
suction or discharge port after the pump has
been connected to the power supply, unless the
mains switch has been locked in the 0/Off
position.
