GRUNDFOS UNILIFT AP12 Submersible Wastewater Pumps Instruction Manual

GRUNDFOS UNILIFT AP12 Submersible Wastewater Pumps

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 that 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 operating instructions and accepted codes of good practice. The warranty does not cover normal wear and tear. To obtain service under this warranty, the defective product must be returned to the distributor or dealer of Grundfos’ products from which it was purchased together 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 installation, 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 limitations 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. Products which are repaired or replaced by Grundfos or authorized service center under the provisions of these limited warranty terms will continue to be covered by Grundfos warranty only through the remainder of the original warranty period set forth by the original purchase date.

General information

Read this document before you install the product. Instal-lation and operation must comply with local regulations and accepted codes of good practice.
Successful operation depends on careful attention to the procedures described in this manual. Keep this manual for future use.

Symbols used in this document

Warnings against hazards involving risk of death or personal injury

DANGER
Indicates a hazardous situation which, if not avoided, will result in death or serious personal injury.

WARNING
Indicates a hazardous situation which, if not avoided, could result in death or serious personal injury.

CAUTION
Indicates a hazardous situation which, if not avoided, could result in minor or moderate personal injury.

The text accompanying the three hazard symbols DANGER, WARNING and CAUTION will be structured in the following way:

SIGNAL WORD
Description of the hazard Consequence of ignoring the warning

• Action to avoid the hazard.

Other important notes

A blue or grey circle with a white graphical symbol indi-cates that an action must be taken. A red or grey circle with a diagonal bar, possibly with a black graphical symbol, indicates that an action must not be taken or must be stopped. If these instructions are not observed, it may result in mal-function or damage to the equipment. Tips and advice that make the work easier.

Overview drawing

UNILIFT AP pump

Description

1. Outlet port
2. Pump sleeve
3. Inlet strainer
4. Handle with clamp
5. Float switch (optional)

Receiving the product

CAUTION
Crushing of feet
Minor or moderate personal injury

• Wear safety shoes when handling the product.
• Use the pump handle to move the pump. Do not lift it by the power cable.

Inspecting the product

Check that the product received is in accordance with the order.
Check that the voltage and frequency of the product match voltage
and frequency of the installation site.

Scope of delivery

The box contains the following items:

• pump
• power cable
• float switch (if included with this model)
• installation and operating instructions.

Installing the product

DANGER

Electric shock
Death or serious personal injury

• The installation, electrical connection, and maintenance of the product must be carried out by an authorized electrician in accordance with the National Electrical Code and any state, local governing codes and regulations.

DANGER

Electric shock
Death or serious personal injury

• Switch off the power supply before starting any work on the product.
• Make sure that the power supply cannot be accidentally switched on.

DANGER

Electric shock
Death or serious personal injury

• Pump installation in a sump pit, basin or tank must be carried out by qualified, specially trained persons in accordance with the National Electrical Code and any state, local governing codes and regulations.

WARNING

Moving parts
Minor or moderate personal injury

• Make sure that persons cannot come into contact with moving parts.
• Do not lift the pump by the power cable or by the outlet pipe or hose.
• 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.

DANGER

Electric shock
Death or serious personal injury

• Route the power cable in a way that supports it and protects it from being cut, pinched or damaged.
• If the power cable is cut, pinched, or damaged, replace it before using the product.

DANGER

Electric shock
Death or serious personal injury

• Do not remove the power cable and strain relief.
• Do not connect electrical conduit to the pump.

Use an approved level controller with a current rating that matches the service factor marked on the product’s nameplate.

Pipe connection

Threaded steel or rigid plastic pipes can be screwed directly into the 1.5″ NPT outlet port. For permanent installation, we recommend that you fit a union, a non-return valve and an isolating valve in the outlet pipe.

Other recommendations:

• For portable or temporary installations, a plastic outlet pipe can be used in conjunction with a suitable, screwed connection or a hose coupling.
• Threads must be sealed using Teflon® tape.
• Do not install the pump hanging from the outlet pipe or hose.
• Do not lift the pump by its power cable. Lower and lift it by means of a wire or chain fastened to the pump handle.

Minimum space

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 in. (100 mm), the minimum dimensions of the sump pit, basin or tank must be as shown in fig. Minimum installation dimensions. In addition, the sump pit, basin or tank must be sized according to the relation between the water flow to the sump pit, basin or tank and the pump performance.

Minimum installation dimensions

Description

1. 21.5 in. (550 mm)
2. 23.5 in. (600 mm)

Location

The pump can be used in vertical as well as horizontal position with the outlet port as the highest point of the pump. See fig. Pump positions. During operation, the inlet strainer must always be completely covered by the pumped liquid.

Pump positions
When the pipe or hose has been connected, place the pump in its operating position. Position the pump so that the inlet strainer will not be blocked by sludge, mud or similar materials. In a permanent installation, the installation site must be cleared of sludge, pebbles, etc. before the pump is installed. We recommend that you place the pump on a solid base. See fig. Pump placed on a plate.

Pump placed on a plate

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 and stops and a large difference in level.
• A reduced free cable length will result in more frequent starts and stops and a small difference in level. The free cable length must be a minimum of 4 in. (100 mm) and a maximum of 14 in. (355 mm). The stop level must be above the inlet strainer to prevent the pump from taking in air.

Start and stop levels

Description

1. Minimum/maximum cable length
2. Start
3. Stop

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

UNILIFT AP start and stop levels

Cable length min. 4 in. (100 mm)                      Cable length max. 14 in. (355 mm)

Start                      Stop                                      Start Stop
19.7 in.                  11.8 in.                                  21.7 in. 4 in.
(500 mm)              (300 mm)                              (550 mm) (100 mm)

Manual operation can be achieved in one of two ways:

• Unplug both the pump and the float switch from the wall socket. Insert the pump plug into the wall socket.
• Keep the float switch in a high position by attaching it to the outlet pipe/hose.

Electrical connection

DANGER

Electric shock
Death or serious personal injury

• Pump installation in a sump pit, basin or tank must be carried out by qualified, specially trained persons in accordance with the National Electrical Code and any state, local governing codes and regulations.

WARNING

Electric shock
Death or serious personal injury

• Connect the product only to a properly grounded receptacle.
• We recommend that you connect the pump to an electrical circuit with a Ground Fault Circuit Interrupter (GFCI).

WARNING

Electric shock
Death or serious personal injury

• The protective ground of the pump power plug must be connected to the protective ground receptacle of the power outlet.
• The plug must have the same ground connection system as that of the power outlet. If not, use a suitable adapter.

The electrical connection must be carried out in accordance with local regulations and follow the National Electrical Code (USA) and the Canadian Electrical Code. The pump must 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.

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.

Pump and float-switch plugs

Description

1. Wall socket
2. Float-switch plug (“piggy-back”)
3. Pump plug

Wiring diagram

Description

1. Green
2. White
3. Black

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.

Starting up the product

DANGER

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

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 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. Start and stop levels. If you want to pump below this level, hold the float switch in vertical position.

Product introduction

The Grundfos UNILIFT AP pump is a single-stage, submersible pump designed for the pumping of wastewater. The pump is designed for automatic operation with a float switch or for manual operation. The pump can be installed in a permanent installation or used as a portable pump.

Applications

DANGER

Electric shock
Death or serious personal injury

• Do not use the pump in or at swimming pools, garden ponds, etc. when there are persons in the water.
• If the pump has been used for very dirty or chlorinated water, flush the pump thoroughly with clean water after use. Wear gloves and other suitable personal protective equipment in accordance with local regulations. Observe local regulations on any exposure to wastewater.

Incorrect use of the pump, for example resulting in blockage or wear of the pump will void the pump’s warranty. Note that the pump is not suitable for these liquids:

• sewage
• liquids containing long fibers
• flammable liquids (oil, gasoline, etc.)
• aggressive liquids.
• liquids containing solids exceeding the pump’s recommended maximum particle size.

The pump is capable of pumping water containing a limited quantity of spherical particles, see section Maximum particle size. Pumping of spherical particles exceeding the maximum particle size for the pump may block or damage the pump.

• Check the regional or local EX-approval requirements for surface water at gas station and in parking areas.

Note: UNILIFT AP does not have any explosion proof approval. See Grundfos SL range.

Identification

Nameplate

Description

1. Product type
2. Product number
3. Supply voltage [V]
4. Power input [hp]
5. Max. current [A]
6. Max. flow rate [gpm]
7.  Max. head [ft]
8. Factory code
9. Production code (year and week)
10.  Insulation class
11.  Voltage tolerance [%]
12. Frequency [Hz]
13. Enclosure class
14. Max. liquid temperature [°F]
15. Cosinus phi
16. Net weight [lb]
17. Max. installation depth [ft]
18. Nameplate layout
19.  Approvals

Type key

Example: UNILIFT AP 35.50.08.A1V

Functions

Pump with float switch
Automatic start and stop.
Pump without float switch
Manual external start and stop.

Pump construction

The main components of the pump appear from the table below and figures A, B and C in the Appendix.

The position numbers are referred to in the cleaning instructions in section Cleaning the pump.

Related information

Servicing the product

DANGER

Electric shock
Death or serious personal injury

• Switch off the power supply before starting any work on the product. Make sure that the power supply cannot be accidentally switched on.

CAUTION
Biological hazard
Minor or moderate personal injury

• Before carrying out maintenance and service, flush the pump thoroughly with clean water.
• After dismantling the pump, rinse the pump parts in clean water.

CAUTION
Sharp element
Minor or moderate personal injury

• Wear protective gloves.

This work must be carried out by specially trained persons. Furthermore, all rules and regulations covering safety, health and environment must be observed.

Clean the pump before service. See section Cleaning the pump. Check the function of the pump, inspect it for damage and replace the oil once a year. If the pump is used for pumping liquids containing abrasive particles or it is operating continuously, replace the oil at shorter intervals.
See the table below. In the case of long operating time or continuous operation, replace the oil as follows:

The pump contains approximately 60 ml non-poisonous oil. Used oil must be disposed of in accordance with local regulations. If the drained oil contains water or other impurities, the shaft seal must be replaced.

Related information

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. Lift the pump out of the liquid and allow it to drain.
3. Carefully loosen the inlet strainer (84) by inserting a screwdriver through one of the holes of the strainer and press it downward. Repeat the procedure until the strainer is free and can be removed.
4. Remove the inlet strainer, clean, and refit it.
5. Place the pump on its base in the liquid.
6. 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. Lift the pump out of the liquid and allow it to drain.
3. Carefully loosen the inlet strainer (84) by inserting a screwdriver through one of the holes of the strainer and press it downward. Repeat the procedure until the strainer is free and can be removed.
4. Remove the inlet strainer and clean it.
5. Unscrew the six screws (188a) close to the edge of the pump sleeve (55) and lift the pump housing (6) out of the pump sleeve.
6. Clean the pump housing, the pump, and the impeller (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 (67) on the shaft.
   • Clean the impeller and the shaft.
8. Check the impeller and the shaft. If the impeller is worn or defective, replace it.
9. Assemble the pump in the reverse order of dismantling:
   • Fit the impeller (49) with the washer and lock nut (67). Make sure the impeller engages with the shaft.
   • Position the O-ring (37a) in the pump sleeve and lower the pump onto the pump housing.
   • Fit the six screws (188a) in the pump housing (6) and tighten securely.

Contaminated pumps

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

CAUTION

Biological hazard
Minor or moderate personal injur y

• Flush the pump thoroughly with clean water and rinse the pump parts in water after dismantling.

The product will be classified as contaminated if it has been used for a liquid which is injurious to health or toxic. If you request Grundfos to service the product, contact Grundfos with details about the pumped liquid before returning the product for service. Otherwise Grundfos can refuse to accept the product for service. Any application for service must include details about the pumped liquid. Clean the product in the best possible way before you return it. Costs of returning the product are to be paid by the customer.

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 Grundfos Product Center (www.grundfos.us). Alternatively, contact your local Grundfos dealer or service center.

Fault finding the product

DANGER
Electric shock
Death or serious personal injury

• Switch off the power supply before starting any work on the product. Make sure that the power supply cannot be accidentally switched on.

The motor does not start.

The motor protection or the thermal relay trips after a short time of

operation.

The pump runs constantly or gives insufficient water.

The pump runs but gives no water.

Technical data

Enclosure class
IP68.
Insulation class
F (311 °F / 155 °C).

Operating conditions

Minimum liquid temperature
32 °F (0 °C).

Maximum liquid temperature
122 °F (50 °C) in continuous operation.

Minimum water level
The water level must be above the inlet strainer.

Maximum installation depth
Maximum 23 ft (7 m) 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 (1100 kg/m3).

Viscosity
Maximum 10 cSt (centistoke) (10 mm2/s).

Operation
The inlet strainer must always be covered by the pumped liquid.
The pump can run continuously. See the nameplate on the pump for the electrical and hydraulic performance data.

Sound pressure level

The sound pressure level of the pump is lower than the limiting values stated in the EC Council Directive 2006/42/EC relating to machinery.

A-weighted sound pressure level
< 65 dB (A) in accordance with ISO 3743. For further technical data, see sections Nameplate and Type key.

Related information

• Nameplate
• Type key

Storage

Storage temperature
Not lower than -22 °F (-30 °C).

Disposing of the product

This product or parts of it must be disposed of in an environmentally sound way:

1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company or service workshop.

Appendix

U.S.A.

• Global Headquarters for WU
• 856 Koomey Road
• Brookshire, Texas 77423 USA
• Phone: +1-630-236-5500
• GRUNDFOS CBS Inc.
• 902 Koomey Road
• Brookshire, TX 77423 USA
• Phone: 281-994-2700
• Toll Free: 1-800-955-5847
• Fax: 1-800-945-4777
• GRUNDFOS Pumps Corporation
• 9300 Loiret Boulevard
• Lenexa, Kansas 66219 USA
• Tel.: +1 913 227 3400
• Fax: +1 913 227 3500

Canada

• GRUNDFOS Canada inc.
• 2941 Brighton Road
• Oakville, Ontario
• L6H 6C9
• Tel.: +1-905 829 9533
• Fax: +1-905 829 9512

Mexico

• Bombas GRUNDFOS de México
• S.A. de C.V.
• Boulevard TLC No. 15
• Parque industrial Stiva Aeropuerto
• Apodaca, N.L. 66600
• Tel.: +52-81-8144 4000
• Fax: +52-81-8144 4010

Revision Info

• Last revised on 04-2021

www.grundfos.com

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