Grundfos Unilift APG Mode d'emploi
UNILIFT APG
Service instructions
Unilift APG Service video
(all available languages)
https://youtu.be/MZXm6PFQmpE
GRUNDFOS INSTRUCTIONS
English (GB) Service instructions
Original service instructions
Table of contents
1. General information ........................4
2. Hazard statements .........................4
3. Notes..................................4
4. Returning the product for service ...............5
5. Safety .................................5
6. Identification .............................5
6.1 Nameplate, UNILIFT APG .....................5
6.2 Type key, UNILIFT APG ......................6
6.3 Storing and handling the product .................6
6.4 Torques and lubricants .......................7
7. Servicing the product .......................8
7.1 General information .........................8
7.2 Replacing the grinder system ..................10
7.3 Adjusting the impeller clearance ................10
7.4 Replacing the cable and float switch ..............11
7.5 Changing the oil ..........................11
8. Fault finding ............................12
8.1 The motor does not start .....................12
8.2 The motor protection or thermal relay trips after a short
time of operation ..........................12
8.3 The pump runs constantly or gives too little water ......12
8.4 The pump runs but gives no water ...............12
9. Drawings ..............................13
1. General information
Read this document before you start service work on the
product. Service work must comply with local regulations
and accepted codes of good practice.
Observe the safety instructions in the installation and op-
erating instructions for the product.
2. Hazard statements
The symbols and hazard statements below may appear in Grundfos
installation and operating instructions, safety instructions and
service instructions.
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 hazard statements are structured in the following way:
SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
3. Notes
The symbols and notes below may appear in Grundfos installation
and operating instructions, safety instructions and service
instructions.
Observe these instructions for explosion-proof products.
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.
4
English (GB)
4. Returning the product for service
If you request Grundfos to service the product, contact Grundfos
with details about the pumped liquid before returning the product.
Otherwise Grundfos can refuse to accept the pump for service.
Costs of returning the product are to be paid by the customer.
However, any application for service, no matter to whom it may be
made, must include details about the pumped liquid if the product
has been used for liquids which are injurious to health or toxic.
5. Safety
WARNING
Installation fault
Death or serious personal injury
‐Pump installation in pits must be carried out by spe-
cially trained persons.
‐Work in or near wastewater pits must be carried out
according to local regulations.
CAUTION
Electric shock
Minor or moderate personal injury
‐It must be possible to lock the mains switch in position
0.
‐Type and requirements as specified in EN 60204-1,
5.3.2.
We recommend that you make all maintenance and serv-
ice work when the pump is placed outside the pit.
For safety reasons, all work in pits must be supervised by a person
outside the pump pit.
Pits for submersible wastewater pumps contain wastewater with
toxic and/or disease-causing substances. Therefore, all persons
involved must wear appropriate personal protective equipment and
clothing and all work on and near the pump must be carried out
under strict observance of the hygiene regulations in force.
Before attempting to lift the pump, make sure that the lift-
ing bracket is tightened. Tighten if necessary.
6. Identification
6.1 Nameplate, UNILIFT APG
DK - 8850 Bjerringbro Denmark
21 0197
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TM081769
Nameplate, UNILIFT APG
Pos. Description
1 Product type
2 Product number
3 Supply voltage
4 Voltage tolerance
5 Power consumption
6 Max. current
7 Max. flow rate
8 Max. head
9 Factory code and production code (year and week)
10 Insulation class
11 Serial number
12 Max. installation depth [m]
13 Net weight [kg]
14 Enclosure class
15 Cosinus phi
16 Speed of rotation
17 Frequency
18 Marks of approval
19 Max. liquid temperature
5
English (GB)
6.2 Type key, UNILIFT APG
Example: UNILIFT APG.40.10.A1. 1x220-240V SCH
Code Explanation Designation
UNILIFT APG Product name
40 Nominal diameter of the
outlet
10 Power output, P2 / 100
[W]
[ ] Manual operation with-
out float switch Level control
AAutomatic operation
with float switch
1 Single-phase Motor type
3 Three-phase
1 x 230 V
Nominal voltage
1 x 220 - 240 V
3 x 220 V
3 x 380 V
3 x 400 V
[ ] No plug
Plug type
SCH Europe - F type wall
plug
ARG Argentina - IRAM ap-
proved I type wall plug
AUS Australia, New Zealand
- I type wall plug
6.3 Storing and handling the product
The pump can be transported in a vertical or horizontal position.
Make sure that it cannot roll or fall over.
6.3.1 Storing the product
During long periods of storage, protect the pump against moisture
and heat.
If the pump has been in use, change the motor liquid before
storage.
After a long period of storage, inspect the pump before putting it
into operation. Make sure that the impeller can rotate freely. Pay
special attention to the shaft seals, O-rings, motor oil and the cable
entry.
6.3.2 Transporting the product
Rate all lifting equipment for the purpose. Check the lifting
equipment for damage before making any attempts to lift the pump.
Do not exceed the lifting equipment rating under any
circumstances. For pump weights, see the pump nameplate
Nameplate.
WARNING
Instable pump
Death or serious personal injury
‐Always lift the pump by its lifting bracket or by means
of a forklift if the pump is fixed on a pallet. Never lift
the pump by means of the motor cable or the hose/
pipe.
The polyurethane-embedded plug prevents water from entering the
motor via the motor cable.
6.3.3 Lifting the product
Do not pull or lift the product by the power cable or by the
outlet pipe or hose.
• Lift the pump using the pump handle.
• 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. The
handle is provided with two lateral holes which may be used to
lift the pump.
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TM081445
Lifting the product
6
English (GB)
6.3.4 Contaminated products
CAUTION
Biological hazard
Minor or moderate personal injury
‐If a pump has been used for a liquid which is injurious
to health or toxic, the pump will be classified as conta-
minated.
See section Returning the product for service.
6.4 Torques and lubricants
Pos. Designa-
tion Quantity Dimen-
sion
Torque
[Nm]
Lubri-
cant
All O-rings All
Rocol
Sapphire
Aqua-Sil
12c Setscrew 3 M6 × 16 -
Castrol
Optimol
Paste
26 Screw 3 M8 × 25 7 ± 1
34 Screw 2 PH
4.2 × 13 2 ± 0.5
44a Screw 1 M8 × 25 7 ± 1
184b Screw 4 TORX
M6 × 20 12 ± 2
188a Screw 1 M8 × 25 10 ± 2
193 Screw 4 TORX
M6 × 75 5 ± 1
Rocol Sapphire Aqua-Sil, product number RM2924 (1 kg).
Castrol Optimol Paste White T, product number V6001176 (0.4 l).
Related information
7.2 Replacing the grinder system
7.3 Adjusting the impeller clearance
7.4 Replacing the cable and float switch
7
English (GB)
7. Servicing the product
7.1 General information
DANGER
Electric shock
Death or serious personal injury
‐Switch off the power supply before you start any work
on the product.
‐Make sure that the power supply cannot be switched
on accidentally.
CAUTION
Biological hazard
Minor or moderate personal injury
‐Use gloves and other suitable personal protection
equipment in accordance with local regulations.
CAUTION
Sharp element
Minor or moderate personal injury
‐Wear protective gloves when working with the grinder
system.
CAUTION
Biological hazard
Minor or moderate personal injury
‐Flush the product thoroughly with clean water before
starting the service.
‐Wear personal protective equipment.
Position numbers of parts (numbers in brackets) refer to
the drawings in the section Drawings.
All service work must be carried out by specially trained staff.
Before carrying out service, make sure that the pump has been
thoroughly flushed with clean water. Rinse the pump parts in water
after dismantling.
Related information
9. Drawings
7.1.1 Maintaining the product
• Check the pump and replace the oil once a year. If the pump is
used for pumping liquids containing abrasive particles or it is
operating continuously, the pump must be checked at shorter
intervals.
• If the drained oil contains water or other impurities, we
recommend that you replace the shaft seal. Contact Grundfos
Service.
7.1.2 Maintenance schedule
Inspect pumps running normal operation every 3000 operating
hours or at least once a year. If the dry-solids content of the
pumped liquid is very high or sandy, check the pump at shorter
intervals.
Check the following:
•Power consumption
See the nameplate.
•Oil level and oil condition
When the pump is new or after replacement of the shaft seal,
check the oil level after one week of operation.
Use MARCOL 152 ESSO oil or equivalent type. Oil auto-ignition
temperature must be above 180 °C.
•Cable entry
Make sure that the cable entry is watertight and that
the cables are not sharply bent and/or pinched.
•Pump parts
Check the wearing parts, for example, impeller and pump
housing. Replace defective parts.
•Grinder system and parts
In case of frequent choke-ups, check the grinder system for
visible wearing. If necessary, replace the grinder system.
7.1.3 Oil
In the case of long operating time or continuous operation, the oil
must be replaced as follows:
Liquid temperature The oil must be replaced after
20 °C 4500 operating hours
40 °C 3000 operating hours
The pump contains 140 ml of non-poisonous oil. Use MARCOL 152
ESSO oil or equivalent type.
Used oil must be disposed of in accordance with local regulations.
8
English (GB)
7.1.4 Service kits
The following service kits are available for all pumps.
Service kit Contents Pos. O-ring material Product number
Impeller 49, 9a, 66, 188a 92693611
Grinder parts 45, 44, 44a, 66,
188a 92693612
Set of screws 5 × M8, 3 × M6 26, 12c 92693631
O-ring kit NBR 194, 157, 37 92693638
Motor kit
Complete motor, single-phase, 220-240 V, 50 Hz
150, 190, 34, 86,
193, 194, 157, 37,
184b
NBR
92693542
Complete motor, single-phase, 220-240 V, 50 Hz, without
hole for float switch 92701743
Complete motor, single-phase, 230 V, 50 Hz 92693544
Complete motor, single-phase, 230 V, 50 Hz, without hole
for float switch 92701745
Complete motor, three-phase, 220 V 50 Hz 92701748
Complete motor, three-phase, 220 V 50 Hz, without hole for
float switch 92701747
Complete motor, three-phase, 380V 50 Hz 92701760
Complete motor, three-phase, 380 V 50 Hz, without hole for
float switch 92701746
Complete motor, three-phase, 400 V 50 Hz 92701761
Complete motor, three-phase, 400 V 50 Hz, without hole for
float switch 92693545
Capacitor (230 V) 161, 194, 157 92695572
Cables
Cable, single-phase without a plug
181, 34, 86, 194,
157 NBR
92693615
Cable, single-phase with AU plug 92697765
Cable, single-phase with ARG plug 92697766
Cable, single-phase with SCHUKO plug 92697767
Cable, three-phase 92693617
Float switch 92695571
9
English (GB)
7.2 Replacing the grinder system
CAUTION
Sharp element
Minor or moderate personal injury
‐Wear protective gloves when touching the sharp
edges of the impeller, grinder head and grinder ring.
For position numbers in brackets, see the exploded drawing in the
appendix.
Proceed as follows:
Dismantling
1. Loosen the screw (44a) that holds the grinder ring in place.
2. Loosen the grinder ring (44) and open the bayonet socket by
knocking or turning the grinder ring 15 to 20° clockwise. See the
figure below.
TM081555
Removing the grinder ring
3. Gently prise the grinder ring (44) out of the pump housing with a
screwdriver.
Make sure that the grinder ring does not get stuck
against the grinder head.
4. Use a plier to hold the grinder head.
5. Loosen and remove the screw (188a) and the locking ring (66)
in the shaft end.
TM081602
Loosen the grinder head
6. Remove the grinder head (45).
Assembly
1. When fitting the grinder head (45), the projections on the back of
the grinder head must engage with the holes in the impeller
(49).
2. Tighten the screw (188a) for the grinder head with a torque of
10 Nm. Do not forget the lock washer.
3. Fit the grinder ring (44).
4. Turn the grinder ring (44) 15 to 20° counterclockwise until it is
tightened.
5. Tighten the screw (44a) with a torque of 7 Nm.
6. Check that the grinder rotates freely.
Related information
6.4 Torques and lubricants
9. Drawings
7.3 Adjusting the impeller clearance
For position numbers in brackets, see exploded drawing in the
appendix.
Proceed as follows:
1. Loosen the set screws fully (12c).
2. Gently tighten the screws (26).
3. Gently tighten the set screws (12c).
4. Loosen the screws (26) with at least three turns.
5. Tighten the set screw (12c) by 180°.
6. Tighten the screws (26) with a torque of 7 Nm.
Related information
6.4 Torques and lubricants
9. Drawings
10
English (GB)
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