Electrical Connection; Installation; Pipe Connection; Installation Dimensions - Grundfos Unilift AP Serie Instrucciones De Instalación Y Funcionamiento

7. Electrical connection

The electrical connection should be carried out in
accordance with local regulations and follow the
National Electrical Code (USA) and the Canadian
Electrical Code. The pump should be grounded.
The 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.
Power supply
• 1 x 115 V, 60 Hz
• 1 x 230 V, 60 Hz.
Motor protection
The Unilift AP-B 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.
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. 2 Pump and float switch plugs
Warning
As a precaution, the pump must be
connected to a socket with earth
connection.
It is recommended to fit the permanent
installation with an earth leakage circuit
breaker (ELCB) with a tripping current
< 30 mA.

8. Installation

Warning
The installation of the pump must be
carried out by specially trained
persons.
Make sure that persons cannot come
into contact with the pump impeller.
Do not lift the pump by the power cable
or the discharge pipework.
Caution
If the pump is installed in a well or tank,
lower and lift it by means of a wire or
chain fastened to the pump handle.
Pump plug

8.1 Pipe connection

Threaded steel or rigid plastic pipes can be screwed
directly onto the 2" NPT discharge port.
For permanent installation, we recommend you to fit
a union, a non-return valve and an isolating valve in
the discharge pipe.
Do not install the pump hanging from
Caution
the discharge pipe.

8.2 Installation dimensions

When the pump is installed in a permanent
installation with a float switch, and the cable length is
set to the minimum length of at least 4" (100 mm),
the minimum dimensions of the well should be as
shown in fig. 3.
In addition, the well should be sized according to the
relation between the water flow to the well and the
pump capacity.
22" (550 mm)
Fig. 3 Minimum installation dimensions

8.3 Pump location

The pump can be used in the vertical or the
horizontal position, see fig. 4.
During continuous operation, the motor and the
suction strainer must always be completely covered
by the pumped liquid.
Fig. 4 Pump positions
When the pipe/hose has been connected, place the
pump in its operating position.
Do not lift the pump by the power cable.
Lift the pump by means of a wire or
Caution
chain secured to the pump handle.
Position the pump so that the suction strainer will not
be blocked or partly blocked by sludge, mud or
similar materials.
22"
7