Safety; Electrical Connection; Installation; Pipe Connection - Grundfos Unilift AP12 Installation And Operating Instructions Manual

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Installation and operating instructions manual (216 pages)

Installation and operating instructions manual (24 pages)

Installation and operating instructions manual (24 pages)

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6. Safety

Warning

Pump installation in wells or tanks

must be carried out by specially trained

persons.

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

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.

Power supply

•

1 x 115 V, 60 Hz

•

1 x 230 V, 60 Hz.

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.

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.

Pump plug

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.

8.1 Pipe connection

Threaded steel or rigid plastic pipes can be screwed

directly into the 1.5" 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.

Other recommendations:

•

For portable or temporary installations, a plastic

discharge pipe can be used in conjunction with a

suitable, screwed connection or a hose coupling.

•

Threads should be sealed using Teflon

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", 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.

‹

550 mm

Fig. 3

Minimum installation dimensions

tape.

‹

21.5"

‹

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Unilift ap35 Unilift ap50

Safety; Electrical Connection; Installation; Pipe Connection - Grundfos Unilift AP12 Installation And Operating Instructions Manual

Available languages

6. Safety

7. Electrical connection

8. Installation

8.1 Pipe connection

8.2 Installation dimensions

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