Fitting The Submersible Drop Cable; Pipework Connection - Grundfos SQ Installation And Operating Instructions Manual

5.7 Fitting the submersible drop cable

It is recommended to join the submersible drop cable
and the motor cable by means of a Grundfos cable
termination kit, type KM.
Cable termination kit, type KM
Cross-sectional area
1.5 to 2.5 mm²
4.0 to 6.0 mm²
For larger cross-sections, please contact Grundfos.

5.8 Pipework connection

If a tool, e.g. a chain pipe wrench, is used when the
riser pipe is fitted to the pump, the pump must only
be gripped by the pump discharge chamber.
When connecting plastic pipes, a compression
coupling should be used between the pump and the
first pipe section.
Note: For pumps fitted with plastic pipes, the
expansion of the pipes when loaded should be taken
into consideration, when deciding on the installation
depth of the pump.
Where flanged pipes are used, the flanges should
be slotted to take the submersible drop cable.
Figure 10 shows a pump installation with indication of:
• position of cable clips, pos. 1, and distance
between the clips.
• fitting of straining wire, pos. 2.
• maximum installation depth below the static water
level.
12
Product number
96021462
96021473
1
2
Fig. 10
5.8.1 Cable clips
Cable clips must be fitted every 3 metres, see fig. 10.
When connecting plastic pipes, some slackness
must be left between each cable clip as plastic pipes
expand when loaded.
Where flanged pipes are used, the cable clips
should be fitted above and below each joint.
5.8.2 Installation depths
Maximum installation depth below the static water
level: 150 metres, see fig. 10.
Minimum installation depths below the dynamic
water level:
• Vertical installation:
During start-up and operation, the pump must
always be completely submerged in water.
• Horizontal installation:
The pump must be installed and run at least
0.5 metres below the dynamic water level.
If there is a risk that the pump might be covered
by mud, the pump must always be fitted in a flow
sleeve.
3 metres
Max.
150
metres