Adjustment Of Cable Length For Float Switch; Electrical Connection - Grundfos Unilift AP12 Installation And Operating Instructions Manual

4.4 Adjustment of cable length for float
switch
The difference in level between start and stop
can be adjusted by changing the free cable
length between the float switch and the pump
handle.
• An increased free cable length will result in
fewer starts and stops and a large difference
in level.
• A reduced free cable length will result in
more frequent starts and stops and a small
difference in level.
The free cable length must be a minimum of 4
in. (100 mm) and a maximum of 14 in. (355 mm).
The stop level must be above the inlet strainer to
prevent the pump from taking in air.
Minimum/maximum
cable length
Fig. 5 Start and stop levels
The start and stop levels vary according to the
cable length.
Unilift AP start and stop levels
Cable length min.
4 in. (100 mm)
Start Stop
19.7 in. 11.8 in.
(500 mm) (300 mm)
Manual operation can be achieved in one of two
ways:
• Unplug both the pump and the float switch
from the wall socket. Insert the pump plug
into the wall socket.
• Keep the float switch in a high position by
attaching it to the outlet pipe/hose.
8
Start
Stop
Cable length max.
14 in. (355 mm)
Start Stop
21.7 in. 4 in.
(550 mm) (100 mm)

4.5 Electrical connection

DANGER
Electric shock
Death or serious personal injury
- Pump installation in a sump pit,
basin or tank must be carried out
by qualified, specially trained
persons in accordance with the
National Electrical Code and any
state, local governing codes and
regulations.
WARNING
Electric shock
Death or serious personal injury
- Connect the product only to a
properly grounded receptacle.
- We recommend that you connect
the pump to an electrical circuit
with a Ground Fault Circuit
Interrupter (GFCI).
WARNING
Electric shock
Death or serious personal injury
- The protective ground of the pump
power plug must be connected to
the protective ground receptacle of
the power outlet.
- The plug must have the same
ground connection system as that
of the power outlet. If not, use a
suitable adapter.
The electrical connection must be carried out in
accordance with local regulations and follow the
National Electrical Code (USA) and the
Canadian Electrical Code. The pump must be
grounded. The operating voltage and frequency
are marked on the nameplate. Make sure that
the motor is suitable for the power supply on
which it will be used.