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)
3
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)
4
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)
5
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)
7
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)
8
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)
10
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

English (GB)
11
Dismantling the cable entry
1. Place the service tool for cable entry (E) in a vice.
2. Mount the cable entry (168) in the service tool for cable entry
(E).
3. Disconnect the signal wires from the molex plug using the
molex tool (A). Remember to mark the position of the wires
carefully. See fig. 13.
4. Unscrew the lower cable entry (168a).
5. Push the cable together with the rubber seal (198) out of the
plug.
6. Remove the rubber seal (198), washers (198a-198b) and
spring disc (198c) from the cable. See fig. 14.
7. Pull and remove the cable (181) from the cable entry.
Fig. 14 Sectional drawing, cable entry
9.7.2 Draining of motor liquid
See section 9.5 Changing the motor liquid.
9.7.3 Removing the motor top cover
1. Remove the cable. See section 9.7.1 Removing the cable.
2. Drain the motor liquid. See section 9.5 Changing the motor
liquid.
3. Remove the moisture absorbing bag from the cables.
4. Remove the six screws (178).
5. Remove the motor top cover (164a).
6. Remove the O-ring (157).
7. Remove the pressure test plug (25).
9.7.4 Removing the upper bearing bracket
1. Remove the screws (183).
2. Use 3 x M10 x 80 screws to lift up the bracket in a balanced
way, using the M10 ∅11 holes. See fig. 15.
3. Remove the upper bearing bracket.
Fig. 15 Upper bearing bracket
9.7.5 Removing SM 113 and the moisture switch
1. Remove the screw and washer of the moisture switch (520).
2. Disconnect the moisture switch wires.
3. Disconnect all wires from SM 113. Remember to mark all
wires carefully.
4. Loosen and remove the screws and washers for the bracket of
SM 113, and remove the SM 113 and the bracket.
9.7.6 Removing the cooling jacket ring (only SE pumps)
1. Remove the cooling jacket ring (754) by means of crowbars or
by using the lifting points. See fig. 16.
2. Remove the O-rings (157c) and (157b).
3. Remove the outer cooling jacket (150c).
Fig. 16 Lifting points in cooling jacket ring
9.7.7 Removing outer and inner cooling jacket (only SE
pump)
1. Remove the outer cooling jacket (150c).
2. Remove the O-ring (37a).
3. Remove the screws (150d).
4. Remove the inner cooling jacket (150b).
TM05 7898 0817
168
198a
198
198b
198c
168a
168c
168b
TM05 5624 3912TM05 5625 3912
M10
∅11
Lifting points

English (GB)
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9.7.8 Removing the impeller
1. Remove the outer screws (26).
2. Lift the pump including the impeller out of the pump housing
(50).
3. Remove the O-ring (37b).
4. Place the motor with impeller in horizontal position on a stable
surface.
5. Bend down the tabs on the lock washer and loosen the
impeller screw (67).
6. Remove the impeller screw (67).
7. Pull off the impeller (49) using a puller. Support the impeller
with a hoist.
9.7.9 Removing the wear ring
1. Remove the screws (49b).
2. Push out the wear ring (49c) from the pump housing (50).
9.7.10 Removing the lower seal housing
1. Mount the shaft seal protection tool (D).
Fig. 17 Shaft seal protection tool
2. Remove the screws (184b).
3. Gently remove the lower seal housing. Use crowbars and a
soft hammer.
9.7.11 Removing the intermediate seal housing (only SE)
1. Remove the three screws (185).
2. Dismantle the intermediate seal housing (58). You may have
to use a soft hammer very gently.
3. Remove the O-ring (37a).
4. Remove the O-ring (107).
9.7.12 Removing the shaft seal cartridge
1. Loosen and remove the shaft seal protection tool (D).
2. Remove the shaft seal spring (105a).
3. Withdraw the shaft seal cartridge from the shaft using a puller.
9.7.13 Removing the upper seal housing (only SL)
1. Remove the screws (182b).
2. Remove the upper seal housing (58). Use a soft hammer very
gently.
3. Remove O-ring (72a).
9.7.14 Removing the upper seal housing cover (only SE)
1. Remove the screw (182b).
2. Remove the O-ring (72a).
3. Gently remove the upper seal housing (58a). Use crowbars
and a soft hammer.
9.7.15 Removing the shaft with rotor
4. Remove the circlip (55a) using the locking-ring pliers (B).
5. Insert an eyebolt into shaft end.
6. Lift the rotor and lower bearing housing slightly away from the
stator housing using the hoist.
7. Disconnect the plugs from the moisture switch and lower the
bearing sensor, if fitted.
8. Lift the rotor away.
9.7.16 Removing the bearings
1. Place the rotor in a vice with soft jaws.
2. Remove the screw and washer of the leakage switch (521).
3. Remove the leakage switch (521).
4. Remove the circlip (187) and the washer (187a).
5. Remove the three screws (182) and the bearing bracket cover
(59).
6. Remove the cable, if the leakage switch (521) is fitted.
7. Pull off the lower bearing bracket (155) and the ball bearing
(153) with a puller.
8. Knock out the bearing of the lower bearing bracket using a
hammer and punch.
9. Remove the upper ball bearing (154) with a puller.
10. Remove the O-ring (72).
9.8 Assembling the pump
Before assembling the pump
• Clean and check all parts.
• Use the drawing and follow the alignment grooves in order to
placed the components correctly. See fig. 47.
• Replace defective parts with new parts.
• Order the necessary service kits.
• Always replace gaskets and O-rings.
During assembling of the pump
• Lubricate and tighten screws and nuts according to section
6. Service tools.
• Use the drawing and follow the alignment grooves in order to
place the components correctly. See fig. 47.
Protect the cone of the impeller shaft against
scratches by taping in the cone or protecting it by
other means.
TM06 5453 4615
On Ex pumps, this work must be carried out by an
Ex-approved service centre.

English (GB)
13
9.8.1 Fitting the bearings
1. Heat the new upper ball bearing (154) to 120 °C, and fit it on
the rotor (172).
2. Place the new lower ball bearing (153) in the lower bearing
bracket (155), and press it home by pressing on the outer
bearing ring.
3. Place the lower bearing bracket with the new lower bearing on
the rotor, and press the bearing home by pressing on the inner
bearing ring.
9.8.2 Fitting the leakage switch (if fitted)
1. Pull the cable of the leakage switch through the hole in the
lower bearing bracket (155).
2. Fit the leakage switch (521) by means of its screws and
washers.
3. Place the bearing bracket cover (59) and fit the screws (182)
and tighten to 40 ± 2 Nm.
4. Fit the washer (187a) and circlip (187) using locking-ring
pliers.
5. Check that the bearings can rotate freely.
9.8.3 Fitting the shaft with bearings and rotor
1. Lubricate the O-ring (72) with Rocol Sapphire Aqua-Sil and fit
it into the stator housing (55).
2. Turn the lower bearing bracket (155) so that the groove in its
circumference is opposite the cable plug of the stator housing.
3. Lower the rotor (172) with lower bearing bracket (155) down
to the stator housing (55) with only a small gap left.
4. Fit the cable plugs to the correct sensors.
5. Lower the rotor into place.
6. Fit the circlip (55a) using locking-ring pliers (B).
9.8.4 Fitting the upper bearing bracket
1. Place the upper bearing bracket (61) on the upper bearing.
2. Fit the three screws (183) very carefully and balanced.
Tighten the screws in such a way that the cover is pressed
down over the bearing.
3. Tighten the screws (183) to 40 ± 2 Nm.
4. Make sure the rotor can rotate freely.
9.8.5 Fitting the upper seal housing cover (only SE)
1. Lubricate the O-ring (72a) with Rocol Sapphire Aqua-Sil, and
fit the upper seal housing cover (58a) into place.
2. Fit the screw (182b) with the washer (182c) and the O-rings
(182d).
3. Lubricate the O-rings with Rocol Sapphire Aqua-Sil.
4. Tighten the screws to 70 ± 4 Nm.
9.8.6 Fitting the upper seal housing (only SL)
1. Lubricate the O-rings (72a and 107) with Rocol Sapphire
Aqua-Sil and fit them on the upper seal housing.
2. Fit the screw (182b) with the washer (182c) and the O-rings
(182d).
3. Lubricate the O-rings with Rocol Sapphire Aqua-Sil, and
tighten the screws to 70 ± 4 Nm.
9.8.7 Fitting the shaft seal
1. Make sure the O-rings are fitted on the shaft seal housing. If
the seal is to be fitted on an SE pump, remember the O-ring
(106).
2. Lubricate the O-rings with Rocol Sapphire Aqua-Sil.
3. Spray soap water on the shaft.
4. Push the seal onto the shaft, and make sure that the marks
are placed correctly.
Fig. 18 Shaft seal assembly, marks
5. Press the shaft seal in place.
6. Mount the locking ring by using the shaft seal protection tool
(D).
Fig. 19 Shaft seal assembly, locking ring
9.8.8 Fitting the intermediate seal housing (only SE)
1. Mount the shaft seal protection tool (D).
2. Lubricate the O-rings (37a and 107) with Rocol Sapphire
Aqua-Sil, and fit them on the intermediate seal housing (58).
3. Fit the intermediate seal housing (58) and the screws (185)
and tighten the screws to 70 ± 4 Nm.
On Ex pumps, this work must be carried out by an
Ex-approved service centre.
On Ex pumps, this work must be carried out by an
Ex-approved service centre.
TM05 4717 2512
Protect the cone of the impeller shaft against
scratches by taping in the cone, or protecting it by
other means.
TM05 4718 2512
Marks

English (GB)
14
9.8.9 Fitting the lower seal housing
1. Mount the shaft seal protection tool (D), if not fitted already.
2. Fit the lower seal housing (77) on the upper seal housing (58).
3. Fit the screws (184b) and tighten to 20 ± 2 Nm.
4. Loosen and remove the shaft seal protection tool (D).
9.8.10 Fitting the wear ring
1. Fit the wear ring (49c) to the pump housing (50).
2. Fit the screws (49b).
9.8.11 Fitting the impeller
1. Fit an eyebolt in the shaft.
2. Lift the stator housing by the eyebolt by means of a hoist.
3. Lay the stator housing (55) on the side on a table or on a
stable surface.
4. Clean the tapered shaft end and the impeller (49).
5. Fit the impeller (49).
6. Lubricate the screw (67) and thread with Castrol Optimol
Paste White T.
7. Fit the impeller washer (66) and screw (67) and tighten to 170
± 4 Nm. Hold the impeller with a strap wrench.
9.8.12 Fitting pump housing
1. Lift the motor by means of a hoist.
2. Lubricate the O-ring (37b) with Rocol Sapphire Aqua-Sil, and
fit it on the lower seal housing (77).
3. Carefully lower the pump into the pump housing (50).
4. Fit the screws (26) and the adjusting screws (12c).
5. Now make the adjustment of the impeller clearance. See
section 9.6 Inspecting and adjusting the impeller clearance.
6. Check that the impeller can rotate freely.
7. After impeller adjustment, place the pump vertically on a
stable surface.
9.8.13 Fitting jacket ring and inner or outer cooling jackets
(only SE)
1. Fit the inner cooling jacket (150b).
2. Fit the screws (150d).
3. Fit the outer cooling jacket (150c).
4. Lubricate the O-rings (157c) and (157b) with Rocol Sapphire
Aqua-Sil and fit them on the cooling jacket ring (754).
5. Fit the cooling jacket ring (754).
6. Fit the screws (178) and tighten to torque 70 ± 4 Nm.
9.8.14 Fitting the motor top cover
1. Fit the pressure test plug (25).
In Ex models the plug must be locked with the screw (25a)
and the washer (25b).
2. Fit the O-ring (157).
3. Fit the moisture absorbing bag to the cables coming from the
stator.
4. Fit the motor top cover (164a).
5. Fit the six screws (178).
9.8.15 Fitting the cable
Assembling the cable entry
1. Place the service tool for cable entry (E) in a vice
1. Mount the cable entry (168) in the service tool for cable entry
(E).
2. Push the cable through the cable entry.
3. Mount the washer (198b), rubber seal (198) and spring disc
(198c) on the cable.
4. Push cable into the cable entry.
5. Mount and tighten the lower cable entry (168a) to the bottom
of the contact surface, and the tension on the spring discs are
optimal.
Fig. 20 Sectional drawing, cable entry
6. Connect the sensor wires to the sensor molex plug.
7. Lift out the terminal block from the top cover.
8. Connect the power wires to the terminal block using a
screwdriver.
9. Push the sensor molex plug into the terminal block.
The pump must be closed within one hour after the
new moisture absorbing bag has been exposed to
atmospheric humidity.
The inner diameter of the washer (198b) needs to fit
with the outer diameter of the cable to avoid
deformation of the rubber seal (198). See fig. 21.
Lubricate the rubber seal well with Rocol Sapphire
Aqua-Sil.
TM05 7898 0817
In order to connect the wires correctly, follow the
marks made during dismantling.
168
198a
198
198b
198c
168a
168c
168b

English (GB)
15
Fitting the cable
10. Fit the cable entry on the motor cover, and fit the screws
(181a).
11. Tighten the screws to 70 ± 4 Nm.
Fig. 21 Cable entry, rubber seal mounting
10. Electrical connection
10.1 Motor protection
Galvanic separation
Double-insulated sensors for all measurements of high voltages
ensure the electrical safety. Furthermore, there is a galvanic
separation inside the IO 113.
10.1.1 Switches and sensors
All SE and SL pumps have thermal protection incorporated in the
stator windings.
The pump may include the following switches and sensors:
• Three thermal switches in the stator windings.
• Moisture switch in the top cover.
• Leakage switch in the chamber above the shaft seal or if it is a
explosion proof version, the lower stator housing.
• Pt1000 in the stator winding (analog).
• Pt1000 in the top bearing (analog).
• Pt1000 in the main bearing (analog).
Fig. 22 Cables seen towards the pump
The protection devices, i.e. three thermal switches, one moisture
switch and one leakage switch, are hard wired out of the pump
via the wires P1, P2 and P3. All other sensors are connected to
SM 113 and the values are transferred to IO 113 via serial
communication. See fig. 31.
TM06 7518 0817
TM05 4254 2112
Standard Sensor version 1 Sensor version 2 Standard Ex. Sensor version 1 Ex. Sensor version 2 Ex.
Klixon/PTC ●●●●●●
Moisture switch, top ●●●●●●
Leakage switch ●●●●●●
Pt1000 in stator winding ●● ●●
Pt1000 in upper bearing ●●
Pt1000 in lower bearing ●●
PVS 3 vibration sensor ●●
SM 113 ●●
IO 113 ●●

English (GB)
16
10.1.2 Thermal switches
The thermal protection against overheating is made with
thermistors and with PTC as optional. The three thermal switches
that are hard wired from pump to IO 113 unit will open if the stator
windings become too hot. The thermal switches are of the
reversible type and will close again when the motor has cooled
down.
This generates both a hardware and software alarm in IO 113,
and the alarm relay will open.
10.1.3 Pt1000 (stator winding temperature)
It is an analog measurement from 0-180 °C.
The value from sensor version 1 or Ex. 1 is measured by external
SM 113 (in the control cabinet).
The value from sensor version 2 or Ex. 2 is measured by internal
SM 113 (inside the pump) and transferred to IO 113 through serial
communication.
10.1.4 Pt1000 (bearing temperature)
It is an analog measurement from 0-180 °C. The value is
measured by SM 113 and transferred to IO 113 through serial
communication.
10.1.5 Moisture and leakage switch
There are two switches placed in an Ex pump, one in the top
cover and one in the stator housing. See fig. 46, sections C-C and
D-D.
There are also two switches in a non-Ex pump. A moisture switch
which is placed in the top cover and a leakage switch which is
placed in chamber above the shaft seal. See fig. 46, sections C-C
and E-E.
The switches are hard wired from the pump. The switches will
open if moisture or a leakage is detected and thus break an
electrical circuit. This will generate both a hardware and a
software alarm in IO 113, and the alarm relay will open.
Installation of the leakage switch
During the installation of the leakage switch (521) on Ex pumps
additional safety precautions must be taken.
The reason for this is to avoid the safety distance between the
leakage switch and lower winding heads being compromised.
Tests have proven that it is possible to reduce the distance by
pulling the wires from the switch during installation. The sensor
protector (521c) ensures that there is no risk of arching or sparks
if the minimum safety distance between the leakage switch and
the lower winding (48) head is compromised, see fig. 23.
Fig. 23 Safety distance for leakage switch
Work on Ex pumps must be carried out by an Ex-
approved service centre.
Do not touch the expansion part, i.e. the cardboard
discs, of the moisture switch with moist or oily hands.
The moisture and leakage switches must be stored in
an air-tight packaging in order to protect the
expansion part against moisture. The relay is factory-
set to 0.19 in (5 mm) and requires no further setting.
We do not recommend that you exchange a moisture
switch with a leakage switch as it may damage the
pump.
TM06 9678 2930
Safety distance
521c
521
48

English (GB)
17
10.1.6 PVS 3
The PVS 3 sensor is intended for use in medium- and large-size
Grundfos wastewater products.
The sensor monitors the vibration level of the pump in order to
protect the pump and the pipe system from damage. Any change
in the vibration level is an indication of an abnormal situation. The
reason for this can be a clogged impeller, worn bearings, closed
outlet valve etc. indicating that a service inspection should be
carried out before the pump or the pipe system is damaged.
The sensor is a 2-wire 4-20 mA transmitter consisting of the
following main sections:
• 3-axes, 2g linear accelerometer with digital interface
• 8-bit micro controller
• Output current generator.
The micro controller reads the digital output of the accelerometer
at a sampling rateof 640 Hz per axis, and processes the 3-axes
acceleration data into an analogue 4-20 mA output proportional to
the RMS value of the total velocity.
The PVS 3 sensor is designed for mounting in the junction box of
the pump motor and must be firmly mounted on the pump
structure with a tight connection on an even surface.
Technical data:
Electrical connection:
A 2-wire screened cable is permanently connected to the sensor:
10.1.7 IO 113
IO 113 provides the interface between the pump equipped with
sensors and the pump controller(s). The most important sensor
status information is indicated on the front panel.
Only one pump can be connected to one IO 113 module.
Together with the sensors, IO 113 provides a galvanic isolation
between the motor voltage in the pump and the connected
controller(s).
IO 113 can do the following as standard:
• Protect the pump against overheating.
• Monitor the status of these items:
– motor winding temperature
– leakage
– moisture in pump.
• Measure the stator insulation resistance.
• Stop the pump in case of alarm.
• Remotely monitor the pump via RS-485 communication
(Modbus or GENIbus).
• Control the pump via a frequency converter.
When IO 113 is combined with SM 113, you can monitor the
following:
– bearing temperature
– vibrations in pump
– rotor speed when the motor is switched off.
10.1.8 SM 113
SM 113 is designed and used for the collection and transfer of
additional sensor data. SM 113 works together with IO 113 (with
communication module, product number 98097390) as shown
below.
SM 113 is built into the top cover of the pump.
SM 113 can collect data from these devices:
• current sensors, 4-20 mA
•Pt100
*or Pt1000** thermal sensors.
* Maximum three Pt100 sensors
** Maximum four Pt1000 sensors
Output Signal type
< 3.5 mA Failure
4-20 mA 0-20 mm/s RMS
> 20 mA Alarm
Measuring frequency: 2-160 Hz
Supply voltage: 12-28 VDC, PELV
Breakdown voltage: ± 30 VDC
Ambient temperature: 0-70 °C.
Brown wire: Positive supply
White wire: Negative supply
Screen: To be connected to earth.
TM05 1966 4111 - TM03 4083 1606
1234567891011121314
PET1 T2 G1 A1 G2 A2 K1 K2 R1 R2
D1 D2 D3 D4 D5 D6 D7 D8
P1 P2 P3 P4 P5
AYB
I1 I2 I3
ON DIP
12345678910
11 12
IO 113 SM 113
Power line
communication
using Grundfos
GENIbus
protocol
Sensor inputs

English (GB)
18
11. Startup
11.1 General startup procedure
This procedure applies to pumps in new installations as well as to
pumps being started up after service inspections, if startup takes
place some time after the pump was placed in the pit.
1. Check that the impeller can rotate freely. Turn the impeller by
hand.
2. Check the condition of the motor liquid.
See also section 9. Servicing the product.
3. Check that the system, bolts, gaskets, pipework and valves
etc. are in good condition.
4. Mount the pump in the system.
5. Switch on the power supply.
6. Check whether the monitoring units are operating
satisfactorily.
7. Pumps with sensor: Switch on IO 113, and check that there
are no alarms or warnings.
See installation and operating instructions for IO 113.
8. Check the setting of the air bells, float switches or electrodes.
9. Check the direction of rotation. See sectionxxxx11.2 Direction
of rotation.
10. Open the isolating valves, if fitted.
11. Check that the liquid level is above the pump motor for S1
operation and to the middle of the pump motor for S3
operation. If the liquid is not at the minimum level, do not start
the pump.
S1: continuous operation
S3: intermittent operation.
12. Start the pump, and let it run briefly. Check whether the liquid
level drops.
13. Check that the outlet pressure and input current are normal. If
not, there might be air trapped inside the pump.
14. After one week of operation or after replacement of the shaft
seal, check the condition of the motor liquid in the seal
housing.
For pumps without sensor, this is done by taking a sample of
the liquid. See section 9. Servicing the product for procedure.
Every time the pump has been removed from the pit, go through
the above procedure when starting up again.
11.2 Direction of rotation
Check the direction of rotation before starting up the pump.
An arrow on the stator housing shows the correct direction of
rotation. Correct direction of rotation is clockwise when viewed
from above.
Checking the direction of direction
Check the direction of rotation in the following way every time the
pump is connected to a new installation.
Procedure
1. Let the pump hang from a lifting device, e.g. the hoist used for
lowering the pump into the pit.
2. Start and stop the pump while observing the movement (jerk)
of the pump. If connected correctly, the impeller will rotate
clockwise, i.e. the pump will jerk counterclockwise. See fig.
24.
3. If the direction of rotation is wrong, interchange any two of the
phases in the power supply cable.
Fig. 24 Jerk direction
12. Fault finding
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 link on the front page of this document.
Do not start the pump if the liquid start level is lower
than the stop level or if the atmosphere in the pit is
potentially explosive.
The pumps are fitted with impellers of S-tube®
design. S-tube®impellers are wet balanced which
will reduce the vibration during operation. If the
pumps are started with the pump housing full of air,
the vibration level will be higher compared to normal
operation.
Local balancing of S-tube®impellers will damage the
wet balancing and lead to a higher vibration level
during operation.
WARNING
Sharp element
Death or serious personal injury
- The impeller may have sharp edges - wear
protective gloves.
Remove trapped air from the pump housing by tilting
the pump by means of the lifting chain when the
pump is in operation.
In case of abnormal noise or vibrations from the
pump, other pump failure, power supply failure or
water supply failure, stop the pump immediately. Do
not attempt to restart the pump until the cause of the
fault has been found and the fault corrected.
The pump may be started for a very short period
without being submerged to check the direction of
rotation.
For Ex pumps, the check must be carried out outside
the Ex area.
TM05 4525 2212

English (GB)
19
13. Refractive index
Use this table as a guideline. The table below shows the ingress
of the four pump sizes of SE, SL 9-30 kW.
Mediaingress
in %
Liquid for submersible motor SML3
Refractive
index
SL 2- and
4-pole
4.5 litres
SL 6-pole
5.4 litres
SE 2- and
4-pole
12.8 litres
SE 6-pole
14.1 litres
RM5418
Grundfos HTF
transfer fluid
RM0350
Demineralised
water
Percentage
[%] Percentage [%] Percentage [%] Degree [°C]
Amount of
ingress
[ml]
Amount of
ingress
[ml]
Amount of
ingress
[ml]
Amount of
ingress
[ml]
038 62-300000
5 36 64 -27 225 270 640 705
10 35 65 -25 450 540 1280 1410
15 33 67 -23 675 810 1920 2115
20 32 68 -22 900 1080 2560 2820
25 30 70 -21 1125 1350 3200 3525
30 29 71 -19 1350 1620 3840 4230
35 28 72 -18 1575 1890 4480 4935
40 27 73 -17 1800 2160 5120 5640
45 26 74 -16 2025 2430 5760 6345
50 25 75 -15 2250 2700 6400 7050

English (GB)
20
14. Wiring diagrams
Fig. 25 Wiring diagram, 8-wire EMC cable
Fig. 26 Wiring diagram, 12-wire standard cable
TM05 2694 0412
Optional
TM05 2695 0412
DELTA
STAR
Optional