Grundfos SE Series Operating instructions

SE, SL 9-30 kW
Service instructions
GRUNDFOS INSTRUCTIONS
Installation and operating instructions in
English and other languages for 50/60 Hz
http://net.grundfos.com/qr/i/98142266
Service animation video, YouTube

English (GB)
2
English (GB) Service instructions
Original service instructions
In this document there are references to the installation and
operating instructions for the SE, SL 9-30 kW (98142266). The
installation and operating instructions are accessible via the QR
code and link on the front of this document.
CONTENTS
Page
1. Symbols used in this document
The text accompanying the three hazard symbols DANGER,
WARNING and CAUTION is structured in the following way:
1. Symbols used in this document 2
2. Safety 3
3. Receiving the product 3
3.1 Transporting the product 3
3.2 Contaminated products 3
4. Storing and handling the pump 3
4.1 Handling the pump 3
4.2 Storing the pump 5
5. Identification 5
5.1 Approvals 5
6. Service tools 6
7. Tightening torques and lubricants 6
8. Overhaul 7
9. Servicing the product 7
9.1 Servicing Grundfos pumps with explosion-proof motors 7
9.2 General information 7
9.3 Checking the motor liquid 8
9.4 Inspecting the shaft seal 8
9.5 Changing the motor liquid 8
9.6 Inspecting and adjusting the impeller clearance 10
9.7 Dismantling the pump 10
9.8 Assembling the pump 12
10. Electrical connection 15
10.1 Motor protection 15
11. Startup 18
11.1 General startup procedure 18
11.2 Direction of rotation 18
12. Fault finding 18
13. Refractive index 19
14. Wiring diagrams 20
15. Connection of sensors 21
15.1 Sensor overview 21
15.2 Internal sensor wiring 22
16. Components and material specification 25
17. Drawings 26
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.
SIGNAL WORD
Description of hazard
Consequence of ignoring the warning.
- Action to avoid the hazard.
Observe these instructions for explosion-proof
products.
A blue or grey circle with a white graphical symbol
indicates 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
malfunction or damage to the equipment.
Tips and advice that make the work easier.

English (GB)
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2. Safety
For safety reasons, all work in pits must be supervised by a
person outside the pump pit.
Pits for submerged sewage and wastewater pumps may contain
sewage or 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 hygienic regulations in force.
3. Receiving the product
3.1 Transporting the product
You can transport the pump in vertical or horizontal position.
Make sure that the pump cannot roll or fall over.
During long periods of storage, the pump must be protected
against moisture and heat.
For further information, see the installation and operating
instructions for SE, SL 9-30 kW. The installation and operating
instructions are accessible via the QR code andthe link on the
front page of this document.
3.2 Contaminated products
For further information, see the installation and operating
instructions for SE, SL 9-30 kW. The installation and operating
instructions are accessible via the QR code and the link on the
front page of this document.
4. Storing and handling the pump
4.1 Handling the pump
The SE, SL 9-30 kW pump weighs between 290 and 690 kg
without accessories. It is therefore very important to use the
correct lifting equipment. The pump weight is stated on the pump
nameplate.
4.1.1 Lifting points
Installation of pumps in pits must be carried out by
specially trained persons.
Work in or near pits must be carried out according to
local regulations.
DANGER
Electric shock
Death or serious personal injury
- It must be possible to lock the main switch in
position 0. Type and requirements as specified in
EN 60204-1, 5.3.2.
Persons must not enter the installation area when the
atmosphere is explosive.
We recommend that you carry out all maintenance
and service work when the pump is placed outside
the pit.
DANGER
Crushing hazard
Death or serious personal injury
- Always lift the pump by its lifting bracket or by
means of a forklift truck if the pump is on a pallet.
Never lift the pump by the motor cable or the hose
or pipe.
Rate all lifting equipment for the purpose, and check
for damage before any attempts are made to lift the
pump. Do not under any circumstances exceed the
rated data.
DANGER
Crushing hazard
Death or serious personal injury
- Always lift the pump by its lifting bracket or by
means of a forklift truck if the pump is on a pallet.
DANGER
Electric shock
Death or serious personal injury
- Never lift the pump by the power supply cables.
DANGER
Crushing hazard
Death or serious personal injury
- Always check the lifting bracket and chain for
corrosion or wear before lifting.
- Always lift the pump by its lifting bracket or by
means of a forklift truck if the pump is on a pallet.
DANGER
Crushing hazard
Death or serious personal injury
- Make sure that the shackles are tightened before
attempting to lift the pump. Tighten if necessary.

English (GB)
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4.1.2 Installation types S, C and D
When lifting the pump, use the right lifting point to keep the pump
balanced. SE, SL pumps installation types S, C and D are
equipped with two lifting points which ensure that the pump can
be lifted in a safe manner. See fig. 1and table below to find the
correct lifting point.
Fig. 1 Lifting points, installation types S, C and D
4.1.3 Installation type H
Installation type H can be lifted by a hole in the flange and the
front lifting point. See fig. 2.
Fig. 2 Lifting points, installation type H
Always handle the pump by means of the correct
lifting points.
TM05 2684 0312
Outlet flange size Lifting point
DN 80 Middle
DN 100 Middle
DN 150 Middle
DN 200 Front
DN 250 Front
DN 300 Front
Front
Middle
TM05 3449 1312

English (GB)
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4.1.4 Raising the pump to upright position
1. Fasten the lifting equipment as shown in the figure below.
Fig. 3 Lifting the pump
2. Lift at the top end of the pump as shown in the figure below.
Fig. 4 Lifting the pump
Fig. 5 Pump correctly raised to upright position
4.2 Storing the pump
For further information, see the installation and operating
instructions for SE, SL 9-30 kW.
The installation and operating instructions are accessible via the
QR code andthe link on the front page of this document.
5. Identification
You can find an example of a nameplate and the explanation of
the type key in the installation and operating instructions for SE,
SL 9-30 kW.
The installation and operating instructions are accessible via the
QR code and the link on the front page of this document.
5.1 Approvals
The explosion-proof versions have been approved by FM
Approvals according to ATEX directive and IEC standards.
For further information, see the installation and operating
instructions for SE, SL 9-30 kW.
The installation and operating instructions are accessible via the
QR code andthe link on the front page of this document.
TM05 4169 2112TM05 4170 2112TM05 4171 2112

English (GB)
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6. Service tools
Standard tools Special tools
7. Tightening torques and lubricants
Rocol Sapphire Aqua-Sil, product number RM2924 (1 kg).
Castrol Optimol Paste White T, product number V6001176 (0.4 l).
Motor liquid SML3, product number 96551348 (5 l).
ABCD
E
Pos. Designation Description Part number
AMolex plug removal
tool SV2117
Pos. Designation Description Part number
BLocking-ring pliers Circlip range
122-400 mm 70147723
CRefractometer 98676968
DShaft seal
protection tool 98565931
EService tool, cable
entry 98761439
Pos. Designation Quantity Dimension Torque
[Nm] Lubricant
All O-rings All Rocol
25 Plug N 3/8" ED 1 3/8" 40 ± 2
26 Hexagon socket head cap screw 6 M20 70 ± 4
67 Hexagon socket head cap screw 1 M16 170 ± 4 Castrol Optimol
150d Hexagon socket head cap screw 2 M6 8 ± 1
173e Hexagon head screw 2 M6 8 ± 1
178 Hexagon socket head cap screw 6 M12 70 ± 4
181a Hexagon socket head cap screw 2 M12 70 ± 4
182b Hexagon head screw 3 M12 70 ± 4
182 Hexagon socket head cap screw 3 M10 40 ± 2
183 Hexagon socket head cap screw 3 M10 40 ± 2
184b Hexagon socket head cap screw, 2- or 4-pole SL pump 3 M8 20 ± 2
184b Hexagon socket head cap screw, 6-pole SE pump 6 M12 70 ± 4
185 Hexagon socket head cap screw 2 M12 70 ± 4
190b Hexagon socket head cap screw 2 M12 70 ± 4
193 Plug N 3/8" ED 4 3/8" 40 ± 2
520a Screw 1 M3 0.5 + 0.2
520c Screw 1 M5 3 + 1
Screw 1 M6 8 ± 1
521b Cross-head screw 1 M6 8 ± 1
705 Hexagon head screw, DN 250 8 M16 170 ± 8
705 Hexagon head screw, DN 300 12 M20 330 ± 8

English (GB)
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8. Overhaul
Check pumps running normal operation every 3000 operating
hours or at least once a year.
If the pumped liquid is very muddy or sandy, check the pump at
shorter intervals.
Check the following points:
•Power consumption
See pump nameplate.
•Motor liquid level and liquid condition
When the pump is new or after replacement of the shaft seal,
check the liquid level and water content after one week of
operation.
The motor liquid should be changed after 3000 operating
hours or once a year.
Use SML3 motor liquid, product no 96551348 (5 l).
See section 9.5 Changing the motor liquid.
•Pump parts
Check the impeller, pump housing etc. for possible wear.
Replace defective parts.
See section 9. Servicing the product for dismantling and
assembly of the pump.
•Ball bearings
Check the shaft for noisy or heavy operation by turning the
shaft by hand. Replace defective ball bearings.
See section 9. Servicing the product.
In case of defective ball bearings or poor motor function, a
complete overhaul of the pump is usually required.
This work must be carried out by Grundfos or an authorised
service centre.
•O-rings and similar parts
During service or replacement, make sure that the grooves for
O-rings and seal faces have been cleaned before the new
parts are fitted.
•Measuring the insulation resistance
Megging must take place at a voltage of minimum 500 V. The
insulation resistance measured must be minimum 50 kΩ.
9. Servicing the product
Service must be carried out by specially trained persons.
Before carrying out service, make sure that the pump has been
thoroughly flushed with clean water. Rinse the pump parts in
water after dismantling.
9.1 Servicing Grundfos pumps with explosion-proof
motors
Only Ex-approved service centres are allowed to intervene in the
flameproof enclosure of the pump. Service not affecting the
explosion protection of the pump and not violating the Ex
regulations may be carried out by service persons who are not
Ex-authorised.
Consequently, these persons are allowed to replace the following
parts of explosion-proof pumps:
• pump housing
• impeller
• seal ring and wear ring
•shaftseal.
All other service work must be carried out by an Ex-approved
service centre. Violation of this requirement will invalidate the Ex
classification of the pump.
9.2 General information
Defective bearings may reduce the Ex safety.
On Ex pumps, the ball bearings may only be
replaced by an Ex-approved service centre.
Never reuse used rubber parts.
Explosion-proof pumps must be checked by an Ex-
approved service centre once a year.
Position numbers of parts (numbers in brackets) refer
to section 17. Drawings. Position numbers of tools
(letters in brackets) refer to section 6. Service tools.
DANGER
Electric shock
Death or serious personal injury
- Before starting work on the pump, make sure that
the fuses have been removed or that the main
switch has been switched off.
Make sure that the power supply cannot be
accidentally switched on.
WARNING
Crushing of hands
Death or serious personal injury
- Make sure that all rotating parts have stopped
moving.
WARNING
Crushing hazard
Death or serious personal injury
- At all times during service, make sure to secure
the pump against rolling over, e.g. by placing a
wooden wedge on either side of the motor.
Except for replacement or dismantling of pump
housing, shaft seal, impeller, seal ring and wear ring,
all other service work must be carried out by
Grundfos or an Ex-approved service centre.

English (GB)
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9.3 Checking the motor liquid
You can check the ingress level of the media in the motor liquid.
When using a refractometer (C), the refractive index will show the
ingress in percent.
If the refractive index is higher than -22 °C, change the motor
liquid.
We recommend that you do not exceed this level of refractive
index to ensure that the shaft seal and bearings are in the best
possible condition for reliable operation.
9.4 Inspecting the shaft seal
Only SL pumps
You can check the leakage of the shaft seal by checking the
upper seal housing chamber (58) for water.
1. Place the pump in a horizontal position on a plane surface,
with the drain plug (193a) pointing downwards.
2. Place a container under the drain plug (193a).
3. Remove the plug (193a).
4. If you drain less than 5 centilitres (cl), the shaft seal is OK and
doesn’t have to be replaced.
5. If you drain more than 5 centilitres, replace the shaft seal. See
section 9.7 Dismantling the pump.
Fig. 6 Draining the upper seal housing
9.5 Changing the motor liquid
When the pump is new or after replacement of the shaft seal,
check the motor liquid level and water content after one week of
operation.
Change the motor liquid after 3000 operating hours or once a
year. See description below.
If you replace the shaft seal, change the motor liquid.
9.5.1 SL pumps
Draining of motor liquid
1. Place a container under the pump which can contain 6 litres of
motor liquid.
2. Place the pump horizontally on a plane surface with plug B
pointing downwards. See fig. 7.
3. Remove plug B.
4. Allow all motor liquid to drain from the seal housing into the
container. Remove plug A to get a better flow of the motor
liquid.
Fig. 7 SL pump, horizontal view
5. Replace the O-ring with a new ring on the plug.
6. Fit plug B and tighten it to the correct torque. See section
6. Service tools.
Media ingress in % Refractive index
0 % -30 °C
5 % -27 °C
10 % -25 °C
15 % -23 °C
20 % -22 °C
TM06 6219 0916
193a 193
WARNING
Pressurised system
Death or serious personal injury
- When loosening the screws of the motor liquid
chamber, note that pressure may have built up in
the chamber. Do not remove the screws until the
pressure has been fully relieved.
TM05 2768 0612
If the motor liquid in the container contains more than
20 % water, the shaft seal may be defective and must
be replaced.
If the quantity of motor liquid deviates considerably
from the quantity stated in the table below, the shaft
seal is defective.
Dispose of used motor liquid (propylene glycol) in
accordance with local regulations.

English (GB)
9
Filling with motor liquid, vertical installation
1. Place the pump vertically.
2. Fill the shaft seal housing with motor liquid through hole A
until the motor liquid reaches the level indicated by plug B.
See fig. 8.
3. Replace the O-ring with a new ring.
4. Insert plugs A and B and tighten them to the correct torque.
See section 6. Service tools.
Fig. 8 SL pump, vertical view
Filling with motor liquid, horizontal installation
1. Place the pump horizontally with plug B mounted and facing
downwards. Fill the shaft seal housing with motor liquid
through hole A until the motor liquid reaches the level
indicated in fig. 7.
2. Replace the O-ring with a new O-ring.
3. Insert plug A and tighten it to the correct torque. See section
6. Service tools.
9.5.2 SE pumps
Draining of motor liquid
1. Place a container under the pump which can contain 15 litres
of motor liquid.
2. Place the pump horizontally on a plane surface with plug D
pointing downwards. See fig. 9.
3. Remove plug D. Remove plug C to get a better flow of the
motor liquid. See fig. 9.
4. Allow all motor liquid to drain from the seal housing into the
container.
5. Replace the O-ring with a new ring on the plug.
6. Insert plug D and tighten it to the correct torque. See section
6. Service tools.
Fig. 9 SE pump, horizontal view
Filling with motor liquid, vertical installation:
1. Remove plug A and B on both sides. This makes it possible to
get the trapped air out while filling. See fig. 10.
2. Fill the shaft seal housing with motor liquid through hole A
until the motor liquid reaches the level indicated in fig. 10.
3. Replace the O-rings with new rings, insert the plugs and
tighten to the correct torque. See section 6. Service tools.
Filling with motor liquid, horizontal installation:
1. Remove plug C.
2. Fill the shaft seal housing with motor liquid through hole C
until the motor liquid reaches the level indicated in fig. 9.
3. Replace the O-ring with a new ring.
4. Insert plug C and tighten to the correct torque. See section
6. Service tools.
Fig. 10 SE pump, vertical, top view
Motor liquid quantities
The table shows the quantity of motor liquid in the cooling
chamber of SE and SL pumps.
Use motor liquid, product no 96551348 (5 l).
Fig. 11 Table of motor liquid quantity
TM05 2768 1216TM05 2775 0512
D
C
C
C
A-A
Liquid level
TM05 2779 0512
Number of poles
Quantity of motor liquid
SE
[litres] SL [litres]
212.84.5
412.84.5
614.15.4

English (GB)
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9.6 Inspecting and adjusting the impeller clearance
You can inspect the impeller clearance of installation types S and
C directly through the pump inlet.
You can inspect and adjust the installation types D and H with the
pump installed on the base stand and connected to the pipework.
9.6.1 Adjusting the impeller clearance
1. Loosen the set screws by two full turns each.
2. Close the impeller clearance by lightly tightening the fastening
screws diagonally until the impeller touches the pump
housing.
3. Loosen the fastening screws to make the correct gap under
the heads of the fastening screws. See fig. 12.
4. Tighten the set screws tightly. For more information about
torques, see section 6. Service tools.
5. Tighten the fastening screws diagonally.
Fig. 12 Impeller clearance adjustment
9.7 Dismantling the pump
Before dismantling the pump
• Switch off the power supply.
• Close the isolating valves, if fitted, to avoid draining the piping
system.
• Disconnect the power supply cable in accordance with local
regulations.
• Note the centre of gravity of the pump to prevent it from
overturning. This is especially important in the case of long
pumps.
9.7.1 Removing the cable
1. Remove the screws (181a) in the cable entry.
2. Slightly lift the cable entry.
3. Using a screwdriver, disconnect the power wires from the
terminal block (176a), and unplug the signal wires. See fig.
13.
4. Remove the O-ring (157d).
Fig. 13 Illustration of cable wires
DANGER
Electric shock
Death or serious personal injury
- Before inspection, make sure that the motor is
switched off and that the main switch is locked in
position 0.
Check the impeller clearance every time service is
carried out to prevent hot surfaces in the hydraulic
parts.
Pressure range Impeller clearance X
[mm]
E: Extra-low pressure 0.9 ± 0.1
L: Low pressure 0.9 ± 0.1
M: Medium pressure 0.6 ± 0.1
H: High pressure 0.6 ± 0.1
S: Super-high pressure 0.5 ± 0.1
Do not use too much force when tightening the
fastening screws as this may damage the bearings.
Use the clearance stated in the impeller clearance
table above.
TM05 1916 3911
X
Fastening screw Fastening screw
Set screw
Remember to mark the position of the wires carefully.
Do not loosen the lower cable entry (168a) as this
will impair the water tightness.
TM05 4343 2212
Signal wires
Power wires