Starting Up The Product; Starting - Grundfos Unilift AP12 Installation And Operating Instructions Manual

Power supply
• 1 x 115 V, 60 Hz
• 1 x 230 V, 60 Hz.
To connect the pump for manual operation,
insert the pump plug into a wall socket. If a float
switch is included for automatic operation, it will
be of the "piggy-back" design. Insert the float-
switch plug into the wall socket, and insert the
pump plug into the back of the float-switch plug.
Wall socket
Float-switch plug
("piggy-back")
Fig. 6 Pump and float-switch plugs
Power supply cable leads
Motor connections
Fig. 7 Wiring diagram
Motor protection
The Unilift AP pumps have built-in thermal
overload protection and require no additional
motor protection. If the motor is overloaded, it
will stop automatically. When cooled to normal
temperature, the motor will start automatically.
Pump plug

5. Starting up the product

DANGER
- Minor to moderate personal injury
- Do not touch the inside of the
pump while the pump is running.

5.1 Starting

Before starting the pump, check that the
following requirements are fulfilled:
• The pump's inlet strainer must be
submerged below the surface of the liquid.
• The pump is placed on a base so that the
inlet strainer is not blocked by silt, mud or
similar materials.
• The pipe or hose connection is tight.
• The outlet pipe or hose is open (hose not
bent, etc.).
• The pump is connected to the power supply
in accordance with the instructions.
• For pumps with a float switch, check that the
float switch can move freely. See section
4.4 Adjustment of cable length for float
switch.
Startup procedure:
1. Switch on the pump and check:
– that the pump is operating properly
– that water is being pumped.
2. For pumps with a float switch, check that the
float switch will allow the pump to pump
down to the chosen level according to fig. 5.
If you want to pump below this level, hold the
float switch in vertical position.
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