Grundfos Unilift AP12, Unilift AP35, Unilift AP50 Installation And Operating Instructions Manual

Unilift AP12, AP35, AP50

GRUNDFOS INSTRUCTIONS

Installation and operatin g instructi on s

LIMITED WARRANTY

Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are warranted to the original user only to be free of defects in material and workmanship for a period of 24 months from date of installation, but not more than 30 months from date of manufacture. Grundfos' liability under this warranty shall be limited to repairing or replacing at Grundfos' option, without charge, F .O.B. Grundfos' factory or authorized service station, any product of Grundfos' manufacture. Grundfos will not be liable for any costs of removal, installation, transportation, or any other charges which may arise in connection with a warranty claim. Products which are sold but not manufactured by Grundfos are subject to the warranty provided by the manufacturer of said products and not by Grundfos' warranty. Grundfos will not be liable for damage or wear to products caused by abnormal operating conditions, accident, abuse, misuse, unauthorized alteration or repair , or if the product was not installed in accordance with Grundfos' printed installation and operati ng instructions.

To obtain service under this warranty, the defective product must be returned to the distributor or dealer of Grundfos' products from which it was pu rchased togeth er with proof of purchase and installation date, failure date, and supporting installation data. Unless otherwise provided, the distributor or dealer will contact Grundfos or an authorized service station for instructions. Any defective product to be returned to Grundfos or a service station must be sent freight prepaid; documentation supporting the warranty claim and/or a Return Material Authorization must be included if so instructed.

GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSSES, OR EXPENSES ARISING FROM INST ALLATION, USE, OR ANY OTHER CAUSES. THERE ARE NO EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WHICH EXTEND BEYOND THOSE WARRANTIES DESCRIBED OR REFERRED TO ABOVE.

Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages and some jurisdictions do not allow limi t actions on how long implied warranties may last. Therefore, the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from jurisdiction to jurisdiction .

Unilift AP12, AP35, AP50

Installation and operating instructions 4

Notice d'installation et de fonctionnement 11

Instrucciones de instalación y funcionamiento 18

CONTENTS

Page

1. Symbols used in this document 4

2. Overview drawing 4

3. Applications 4

4. Functions 5

5. Storage and operating conditions 5

6. Safety 6

7. Electrical connection 6

8. Installation 6

8.1 Pipe connection 6

8.2 Installation dimensions 6

8.3 Pump location 7

8.4 Adjustment of cable length for float switch 7

9. Operation 7

9.1 Starting 7

10. Maintenance and service 8

10.1 Pump construction 8

10.2 Cleaning the pump 8

10.3 Contaminated pumps 8

10.4 Replacement of parts 8

11. Technical data 9

11.1 Sound pressure level 9

12. Fault finding chart 10

13. Disposal 10

1. Symbols used in this document

2. Overview drawing

Fig. 1 Unilift AP pump

3. Applications

The Grundfos Unilift AP pumps are single-stage, submersible pumps designed for the pumping of wastewater.

The pumps are capable of pumping water containing a limited quantity of spherical particles up to these sizes:

• Unilift AP12: 0.47" in diameter

• Unilift AP35: 1.38" in diameter

• Unilift AP50: 1.97" in diameter Pumping of spherical particles exceeding the above

sizes may block or damage the pump. The pumps are designed for automatic operation

with float switch and for manual operation. The pump can be installed in a permanent installation or used as a portable pump. Incorrect use of the pump, for example resulting in blockage or wear of the pump, is not covered by the warranty.

Warning Prior to installation, read these

installation and operating instructions. Installation and operation must comply with local regulations and accepted codes of good practice.

Warning If these safety instructions are not

observed, it may result in personal injury!

Caution

If these safety instructions are not observed, it may result in malfunction or damage to the equipment!

Note

Notes or instructions that make the job easier and ensure safe operation.

TM03 6189 4406

Discharge port

Pump sleeve

Suction strainer Float switch

Handle with clamp

The pump is suitable for these applications:

The pumps are not suitable for these liquids:

• sewage

• liquids containing long fibers

• liquids containing solid particles exceeding the sizes mentioned in 5. Storage and operating

conditions

• flammable liquids (oil, gasoline, etc.)

• aggressive liquids.

4. Functions

Pump with float switch

Automatic start/stop.

Pump without float switch

Manual external start/stop.

5. Storage and operating conditions

Storage temperature

Not lower than –4 °F.

Minimum liquid temperature

32 °F.

Maximum liquid temperature

+122 °F continuously. At intervals of at least 30 minutes, the pump is

allowed, however, to run at maximum +158 °F for periods not exceeding 2 minutes.

Minimum water level

The water level must be above the strainer inlet.

Maximum installation depth

30 feet below liquid level.

Maximum starts per hour

20 starts, evenly distributed once every 3 minutes.

pH value

Between 4 and 10.

Maximum particle size

Density

Maximum 68 lbs/ft³.

Viscosity

Maximum 10 cSt (centistoke).

Operation

The suction strainer must always be covered by the pumped liquid.

Intermittent operation

The pump is allowed to run for maximum 5 minutes per 30 minutes without the motor being submerged in the liquid.

Continuous operation

During continuous operation, the pump must always be completely covered by the pumped liquid.

Technical data

See section 11. and pump nameplate.

Applications AP12 AP35 AP50

Pumping of water from flooded basements or buildings

zzz

Pumping of wastewater from washing machines, sinks, baths, showers, etc., up to the sewer level

zzz

Dewatering of sites or pumping of water for fountains

zzz

Pumping of water from drain water collecting tanks

zzz

Emptying of swimming pools, ponds, tanks or fountains

zzz

Pumping of fibre-containing wastewater from laundries and industries

Pumping of surface water from septic tanks and sludge treatment systems

Pumping of domestic wastewater without discharge from water closets

Warning Do not use the pumps in or at

swimming pools, garden ponds, etc. when there are persons in the water.

Note

If the pump has been used for very dirty or chlorinated water, it should be flushed thoroughly with clean water after use.

Pump type M ax. spherical diameter

Unilift AP12 0.47" Unilift AP35 1.38" Unilift AP50 1.97"

6. Safety

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.

Fig. 2 Pump and float switch plugs

8. Installation

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

tape.

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 an d the pump capacity.

Fig. 3 Minimum installation dimensions

Warning Pump installation in wells or tanks

must be carried out by specially trained persons.

TM03 4461 2106

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 <30mA.

Float switch plug ("piggy-back")

Wall socket

Pump plug

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.

Caution

Do not lift the pump by the power cable or the discharge pipework.

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.

Caution

Do not install the pump hanging from the discharge pipe.

TM03 6194 4406

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550 mm

600 mm

21.5"

23.5"

8.3 Pump location

The pump can be used in the vertical or the horizontal position with the discharge port as the highest point of the pump. See fig. 4.

During operation, 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.

Position the pump so that the suction strainer will not be blocked or partly blocked by sludge, mud or similar materials.

In the case of permanent installation, the well must be cleared of sludge, pebbles, etc. before the pump is installed.

We recommend you to place the pump on a solid base, see fig. 5.

Fig. 5 Pump placed on a plate

8.4 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/stops and a large difference in level.

• A reduced free cable length will result in more

frequent starts/stops and a small difference in level.

In order that the float switch can start and stop the pump, the free cable length must be min. 4" and max. 14".

The stop level must be above the suction strainer to prevent the pump from taking in air.

Fig. 6 Start/stop levels

The start/stop levels vary according to the cable length.

Manual operation can be achieved in one of two ways:

• Unplug both the pump and float switch from the wall socket. Insert the pump plug into the wall socket.

• Keep the float switch in a high position by fixing it to the discharge pipe/hose.

9. Operation

9.1 Starting

Before starting the pump, check that the following requirements are fulfilled:

• The pump is submerged in the liquid. During normal operation, the suction strainer must be below the surface of the liquid.

• The pump is placed on a base so that the suction strainer is not blocked by silt, mud or similar materials.

• The pipe/hose connection is tight.

• The discharge pipe is open (hose not bent, etc.).

• The pump is connected to the power supply in accordance with the instructions.

• The float switch can move freely.

After start-up:

1. Switch on and check:

– that the pump is operating properly – that water is being pumped.

2. Check that the float switch will allow the pump to pump down to a level of approximately 4". To pump out below this level, fasten the float switch in the manual position. See 8.4 Adjustment of cable length for float switch.

TM03 6193 4406

Caution

Do not lift the pump by the power cable. Lift the pump by means of a wire or chain secured to the pump handle.

TM03 3691 4406

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TM03 6192 4406

Cable length

Min. 4"

Cable length

Max. 14"

Start Stop Start Stop

Unilift AP 19.7" 11.8" 21.7" 4"

Min./max. cable length

Start

Stop

10. Maintenance and service

10.1 Pump construction

The main components of the pump appear from the table below and figures A, B and C on page 26.

The position numbers are referred to in the following cleaning instructions.

10.2 Cleaning the pump

If the pump does not deliver a sufficient quantity of water because of sediment, dismantle and clean the pump.

To dismantle the pump, follow this procedure:

1. Disconnect the power supply.

2. Allow the pump to drain.

3. Carefully loosen the suction strainer (pos. 84) by inserting a screwdriver through one of the holes of the strainer and press it downwards (towards bottom). Repeat the procedure until the strainer is free and can be removed.

4. Remove the suction stainer, clean, and refit it.

5. Connect the power supply and start the pump.

If the pump still does not deliver sufficient water, dismantle the pump:

1. Disconnect the power supply.

2. Allow the pump to drain.

4. Remove the suction stainer and clean it.

5. Unscrew the six screws (pos. 188a) close to the edge of the pump sleeve (pos. 55) and lift the pump housing (pos. 6) out of the pump sleeve.

6. Clean the pump housing, the pump, and the impeller (pos. 49).

7. Check to make sure the impeller can rotate freely. If not, remove the impeller:

– Hold the impeller in place with a screwdriver

while loosening and removing the lock nut (pos.

67) on the motor shaft.

– Clean the impeller and around the shaft.

8. Check the impeller and around the shaft. If the impeller is worn or defective, replace it.

9. Assemble the pump in reverse order of dismantling:

– Fit the impeller (pos. 49) with the washer and

lock nut (pos. 67). Make sure the impeller engages with the shaft.

– Position the O-ring (pos. 37a) in the pump

sleeve and lower the pump into the pump housing.

– Fit the six screws (pos. 188a) with gaskets in

the pump housing (pos. 6) and tighten securely.

10.3 Contaminated pumps

Any application for service (no matter to whom it may be made) must include details about the pumped liquid.

If Grundfos is requested to service the pump, Grundfos must be contacted with details about the pumped liquid, etc. before the pump is returned for service. Otherwise Grundfos can refuse to accept the pump for service.

Possible costs of returning the pump are paid by the customer.

10.4 Replacement of parts

The impeller assembly and power cable can be replaced. The part numbers and the components included in the service kits can be found on WebCAPS (www.grundfos.com). Alternatively, contact your local Grundfos dealer.

Warning Before starting work on the pump,

make sure that the power supply to the pump has been switched off and that it cannot be accidentally switched on.

During dismantling, caution should be exercised as there will be access to sharp edges, etc. which may cut.

Warning Before carrying out maintenance an d

service, make sure that the pump has been thoroughly flushed with clea n water. Rinse the pump parts in water after dismantling.

Pos. Description

6 Pump housing

37a O-ring

49 Impeller 55 Pump sleeve with motor 66 Washer 67 Lock nut

84 Suction strainer 105 Shaft seal 182 Float switch

188a Screws

193 Screws

Warning If a pump has been used for a liquid

which is injurious to health or toxic, the pump will be classified as contaminated.

11. Technical data

Enclosure class

IP68.

Insulation class

F (311 °F).

11.1 Sound pressure level

The sound pressure level of the pump is lower than the limiting values stated in the EC Council Directive 98/37/EC relating to machinery.

A-weighted sound pressure level

< 65 dB (A) in accordance with ISO 3743.

For further technical data, see nameplate.

+ 19 hidden pages

Grundfos Unilift AP12, Unilift AP35, Unilift AP50 Installation And Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual