Adjustment Of Float Switch; Non-Return Check Valve; Operation; Starting - Grundfos Unilift KP 150 Instrucciones De Instalación Y Funcionamiento

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Before positioning the pump, make sure that the suc-

tion strainer will not be blocked or partly blocked by

silt, mud or similar materials.

This can be avoided by positioning the pump on

bricks, an iron plate, etc. See fig. 5.

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Fig. 5

3.4 Adjustment of float switch

The float switch can automatically turn the pump on

and off. Switching the adjustment is possible by

repositioning the float switch in the handle of the

pump.

The free cable length must always be:

• at least 2.5 inches

• no more than 6 inches.

Min./max.

cable length

••••••••

•••••••••

••••••••• •

••••••••••

••••••••• •

•••••••••••

••••••••• •

•••••••••••

•••••••••• ••

•••••••••••

•••••••••• ••

••••••••••••••

Fig. 6

The start/stop level varies according to the cable

length.

Cable length

Min. 2.5"

Start

Unilift KP 150

11.5"

Unilift KP 250

Unilift KP 350

12"

For manual operation, unplug both the pump and

float switch from the 115V outlet. Plug the 115V plug

on the pump into the outlet.

3.5 Non-return check valve

Whenever the pump is installed in a permanent

installation with a float switch, a non return valve

must be fitted in the discharge pipe or hose.

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Start

Stop

Cable length

Max. 6"

Stop

Start

Stop

5.5"

12,5"

4. Operation

4.1 Starting

Before starting the pump, check:

• whether the pump is submerged in liquid. During

normal operation, the strainer of the pump must

be below the surface of the liquid

• whether the pump is positioned on a base so that

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the strainer is not blocked by silt, mud or similar

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materials

• whether the pipe/hose connection is tight

• whether the discharge pipe is open (bend of hose,

etc.)

• whether the pump is connected to the electric sup-

ply in accordance with the instructions

• check the float switch for free movement.

After start-up, check that:

• the pump operates properly, that water is being

pumped, and the pump operates through the con-

trol sequence

• the float switch will allow the pump to pump down

to a level of approximately 4". To pump out below

this level secure the switch in the manual position.

See 3.4 Adjustment of float switch.

As a precaution, the suction strainer must

always be fitted to the pump during opera-

tion.

5. Maintenance

Under normal operating conditions, the pump is

maintenance-free.

If the pump has been used for liquids other than

clean water, it should be flushed through with clean

water immediately after use.

5.1 Cleaning the pump

Never dismantle the pump unless the elec-

tricity supply has been switched off.

During dismantling, caution should be

exercised as there will be access to sharp

edges, etc. which may cut.

If the pump does not deliver a sufficient quantity of

water because of sediment, dismantle and clean the

pump.

The dismantling of the pump is carried out as fol-

lows:

1. Disconnect the electricity supply.

3.5"

2. Allow the pump to drain.

3. Carefully loosen the suction strainer by inserting

a screwdriver in the recess between the outer

casing and the strainer and pressing it hard.

Repeat the procedure until the strainer is free

and can be removed, see fig. 7.

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Unilift kp 250 Unilift kp 350

Adjustment Of Float Switch; Non-Return Check Valve; Operation; Starting - Grundfos Unilift KP 150 Instrucciones De Instalación Y Funcionamiento

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3.4 Adjustment of float switch

3.5 Non-return check valve

4. Operation

4.1 Starting

5. Maintenance

5.1 Cleaning the pump

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