Installing The Level Sensor Tube; Installing An Alarm Float Switch; Installing The Outlet Pipes - Grundfos UNOLIFT Series Installation And Operating Instructions Manual

3.14 Installing the level sensor tube

If your pump is not equipped with a float switch, you
must install a level sensor tube in the tank.
1. Fix the level sensor tube to the brackets inside
the tank.
The locking ring of the tube must be under the
top bracket to prevent the tube from rising with
the water level.
2. Lead the level sensor hose through the gland.
3. Tighten the gland.
Fig. 16 Correct positioning of the level sensor
tube

3.15 Installing an alarm float switch

If you have an alarm device, you can install an
additional float switch inside the tank and connect it
to the alarm device in order to trigger a high-level
alarm.
If you have an LC 220 or LC 221 controller, you do
not need an additional alarm float switch as high-
level alarm is triggered by the level sensor.
1. Fix the cable of the float switch to the pump
connecting pipe with a cable tie.
• Make sure that there is a free cable length of
minimum 70 mm.
• Make sure that the float switch can move freely
from its lowest position to its highest position.
2. Tighten the cable tie.
3. Drill a hole, ∅20, for the cable gland.
4. Fit the cable gland. See fig. 5.
5. Lead the cable of the float switch through the
cable gland.
6. Tighten the cable gland.
Fig. 17 Alarm float switch

3.16 Installing the outlet pipes

The outlet pipes described in this section are
accessories.
3.16.1 Cutting the pipe
This section applies to Duolift. The outlet pipe kit
includes a 2 metres' pipe ∅50. Cut the pipe into two
pieces of according to the table below.
Model
Duolift CC, KP, SEG, 270 L
Duolift CC, KP, SEG, 540 L
Duolift APB, 270 L
Duolift APB, 540 L
3.16.2 Assembling the outlet pipes
See the drawings below.
Tips for Duolift
1. Assemble the outlet pipes before connecting
anything to the tank.
2. Connect the outlet pipes to the tank by tightening
the two union nuts on the tank outlets. See pos. 1
in figures 18 and 20.
Pipe length
[mm]
2 x 180
2 x 430
2 x 163
2 x 413
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