Installing The Level Sensor Tube; Installing An Alarm Float Switch; Assembling The Discharge Pipes - Grundfos DUOLIFT Series Installation And Operating Instructions Manual

3.15 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 clamps inside the
tank.
The locking ring of the tube must be under the
top clamp to prevent the pipe from rising with the
water level.
2. Lead the level sensor hose through the cable
gland.
3. Tighten the cable gland.
Fig. 13 Correct positioning of the level sensor
tube

3.16 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 a controller LC 220 or LC 221, you do not
need an additional alarm float switch as the high
level alarm is triggered by the level sensor.
1. Use a strip to attach the cable of the float switch
to the inner connecting pipe.
• 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 strip.
3. Lead the cable through the cable gland.
4. Tighten the cable gland.
Fig. 14

3.17 Assembling the discharge pipes

The discharge pipes described in this section are
accessories.
3.17.1 Cutting the pipe (Duolift only)
The discharge pipe kit is delivered with a 2 meter
pipe ∅50. You need to cut it into 2 pieces of a
specific size, which depends on the Duolift model
and the pump type. Use the dimensions in the table
below:
Model
Duolift CC/KP/SEG, 270 L
Duolift CC/KP/SEG, 540 L
Duolift APB, 270L
Duolift APB, 540L
3.17.2 Assembling
Assemble the discharge pipes according to the
drawing below.
Tip for Duolift:
1. Assemble the whole discharge pipe before
connecting anything to the tank.
2. Connect the assembled discharge pipe to the
tank by tightening the two fitting unions onto the
tank outlets. See pos. 3.
Cut to size
[mm]
2 x 180
2 x 430
2 x 163
2 x 413
13