Grundfos SRP Series User manual

GRUNDFOS INSTRUCTIONS
SRP
60 Hz, North America
Installation and operating instructions

Table of contents
SRP
3
English (US)
Installation and operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Español (MX)
Instrucciones de instalación y funcionamiento . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Français (CA)
Notice d'installation et de fonctionnement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

English (US)
4
English (US) Installation and operating instructions
LIMITED WARRANTY
Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are
warranted to the original user only to be free of defects in material and workmanship
for a period of 24 months from date of installation, but not more than 30 months from
date of manufacture. Grundfos' liability under this warranty shall be limited to repairing
or replacing at Grundfos' option, without charge, F.O.B. Grundfos' factory or authorized
service station, any product of Grundfos' manufacture. Grundfos will not be liable for
any costs of removal, installation, transportation, or any other charges which may arise
in connection with a warranty claim. Products which are sold but not manufactured by
Grundfos are subject to the warranty provided by the manufacturer of said products
and not by Grundfos' warranty. Grundfos will not be liable for damage or wear to
products caused by abnormal operating conditions, accident, abuse, misuse,
unauthorized alteration or repair, or if the product was not installed in accordance with
Grundfos' printed installation and operating instructions.
To obtain service under this warranty, the defective product must be returned to the
distributor or dealer of Grundfos' products from which it was 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 limit actions on how long implied
warranties may last. Therefore, the above limitations or exclusions may not apply to
you. This warranty gives you specific legal rights and you may also have other rights
which vary from jurisdiction to jurisdiction.

5
English (US)
CONTENTS
Page
1. Symbols used in this document
1. Symbols used in this document 5
2. Product introduction 6
2.1 Applications 6
2.2 Technical data 6
3. Identification 6
3.1 Type key 6
3.2 Nameplate 7
4. Safety 7
4.1 General safety instructions 7
5. Transportation, delivery and storage 7
5.1 Transportation 7
5.2 Delivery 7
5.3 Storage 7
6. Installation 8
6.1 Positioning 8
6.2 Torque values 9
6.3 Installation instructions 9
7. Electrical connection 11
7.1 Motor protection 11
7.2 Gearbox protection 12
7.3 Overload relays 12
7.4 Starting method 12
7.5 Wiring diagrams 13
7.6 Direction of rotation 13
7.7 Protection from electro-chemical corrosion 13
7.8 Frequency converter operation 13
8. Start-up 14
9. Service 14
9.1 Contaminated pump 14
9.2 Service chart 15
9.3 Oil 16
9.4 Oil change 16
10. Fault finding 17
11. Technical data 18
11.1 Motor 18
11.2 Gearbox 18
11.3 Shaft seals 18
11.4 Propeller 18
11.5 Sound pressure level 18
12. Disposal 18
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
The use of this product requires experience with
and knowledge of the product.
Persons with reduced physical, sensory or men-
tal capabilities must not use this product, unless
they are under supervision or have been
instructed in the use of the product by a person
responsible for their safety.
Children must not use or play with this product.
Warning
If these safety instructions are not observed,
it may result in personal injury.
Warning
If these instructions are not observed, it may lead
to electric shock with consequent risk of serious
personal injury or death.
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Note
Note
Notes or instructions that make the job easier
and ensure safe operation.

English (US)
6
2. Product introduction
Grundfos recirculation pumps type SRP are designed for transfer
of liquids of low to medium viscosity from one tank to another.
Fig. 1 SRP pump
2.1 Applications
Grundfos SRP recirculation pumps are used for the pumping of
return sludge in sewage treatment plants and for other pump
applications involving a high flow rate and low head. The pumps
are designed for continuous operation fully submerged
(S1 operation).
In order not to overload the pumps and expose them to corrosion,
the following limitations must be observed.
* With a maximum dry solid content of 1.5 %.
2.2 Technical data
3. Identification
3.1 Type key
TM03 0374 3308
Pos. Description
4 Pump rack
7Motor
8 Gearbox
10 Propeller
22 Hydraulic inlet
Liquid temperature 41 °F to 104 °F
(5 °C to 40 °C)
pH value 4 to 10
Maximum sludge index 14.98 gallon/lb
(125 ml/g)
Maximum dynamic viscosity 500 CSt (mPas)
Maximum density 8.846 lb/gallon
(1060 kg/m3)
Chloride content ≤1.67 x 10-3 lb/gallon
(200 mg/l)
(for stainless steel AISI type 304)
Voltage tolerance - 10 %/+10 % of
nameplate value
Enclosure class IP68
Insulation class F
Maximum installation depth 66 ft (20 m) below liquid
level
Maximum number of starts per hour 20
Standard length of power cable 30, 50 or 80 ft
(10, 15 or 25 m)
Standard cable length on all winches 30, 50 or 80 ft
(10, 15 or 25 m)
22 4710
8
Example SRP. 11. 12. 524. 08. 6. 0P
Type range
SRP: Submersible recirculation pump
Motor output power, P2
P2: Code from type designation/10 [hp]
11 1.1 hp
Propeller diameter
12: 12 inches
Propeller speed
524: 524 min-1
Propeller blade pitch
08: 8 °
Explosion protection
[-]: Non-explosion-proof
Frequency
5: 50 Hz
Voltage and starting method
0P: 440-480 V, DOL
1P: 440-480 V, Y/D
0Z: Special, DOL
1Z: Special, Y/D
Generation
[-]: First generation
A: Second generation
B: Third generation

7
English (US)
3.2 Nameplate
Fig. 2 Nameplate
The nameplate is on the motor housing. The details on the
nameplate are required for ordering spare parts.
The additional nameplate supplied with the pump should be fixed
in a visible position at the installation site.
4. Safety
4.1 General safety instructions
5. Transportation, delivery and storage
5.1 Transportation
The individual components of the pump must be packed carefully
to prevent any damage to the surface during transportation.
All lifting equipment must be rated for the purpose and checked
for damage before any attempts to lift the components are made.
The lifting equipment rating must under no circumstances be
exceeded.
5.2 Delivery
On delivery, the pump and any accessories supplied with it
should be checked for transport damage. This also applies when
the equipment is delivered to the installation site.
If the pump or any accessories have been damaged during
transportation, contact your local Grundfos company before
continuing to install the equipment. Do not dismantle a damaged
new component for further inspection, unless instructed by your
local Grundfos representative.
The packaging material must be disposed of according to local
regulations.
5.3 Storage
The pump must be stored in a dry location in which the
temperature is not subject to major fluctuations.
If the pump has been stored for more than one year, the gearbox
oil must be changed. The oil must be changed even if the pump
has never been in use. This is necessary because of natural
aging of mineral oil lubricants.
TM04 9249 1037
Pos. Description
1 Type designation
2 Production code
3 Propeller diameter
4 Liquid temperature range
5 Product number
6 Enclosure class according to IEC
7 Serial number
8 Insulation class
9 Rated voltage
10 Rated speed (propeller)
11 Weight
12 Starting current
13 Frequency
14 Number of poles
15 Rated current
16 Power factor
17 Motor power P1/P2
18 Model
19 Maximum installation depth
20 Service factor
Warning
Before starting work on the product, make sure
that the fuses have been removed or the mains
switch has been switched off. Make sure that the
power supply cannot be accidentally switched
on.
Type
P.c.
P1/P2
Cos.
Model
in
A
Hz
F
ø
I
N
n
N
Pol
T
Prod.No:
96257011
See MANUAL!
CH-6105 Schachen
Insul.class:
No:
IP
U V
I
start
Weight lb
/minA
15 1214 13
1234 567
18
17
16
19
HP
ft
9
10
11
8
S.F.:
20
Warning
These safety instructions as well as the
instructions in each individual section must be
followed when transporting, storing, handling
and operating the pump.
The pump must be installed, connected, started
up and serviced by qualified persons.
Beware of rotating parts.
Make sure that persons cannot accidentally fall
into the tank, e.g. by installing a cover or railing.
Warning
Make sure that the pump cannot roll or fall over.
Warning
Before attempting to lift or otherwise handle the
individual components of the pump, observe any
local regulations that set limits for the weight of
the components to be lifted manually by
individuals, i.e. handled without the use of lifting
equipment.
Warning
A damaged pump must not be installed.

English (US)
8
6. Installation
During installation, the pump must only be lifted when using the
suspension point.
The lifting equipment supplied with the pump as well as the cable
used for lifting and lowering the pump into the tank must not be
used as universal lifting equipment.
6.1 Positioning
Correct positioning of the pump is essential to ensure trouble-free
operation and long life. The following guidelines must be
observed.
• If more than one pumps is installed in the same tank,
they must not generate opposite flows, meaning that different
inlets/outlets should not destroy the general flow.
• The distance from the center of the pump to the tank bottom
(Hmin) must notbe less than the propeller diameter. See fig. 3.
• The distance from the top of the pump rack to the liquid
surface (HABOVE) must fulfil one of the following two
requirements:
– For pumps with vortex shield, the distance must at least be
equal to the propeller diameter.
– For pumps without vortex shield, the distance must at least
be equal to 1.5 times the propeller diameter. See fig. 3.
Fig. 3 Distance to liquid surface and tank bottom
Fig. 4 Open installation
* Guide claws are only available for SRP.xx.32.
Caution
Never hang the pump by the power cable.
Never let the pump run while hanging by the
lifting equipment.
Note
Note
Actual mounting assemblies supplied locally may
differ slightly from the detailed assembly
described although functionality will be
maintained
TM02 9478 2704
Hmin HAbove
TM04 3962 0509
Pos. Designation
1Bottom mounting bracket and guide claws on
connection flange *
2 Guide rail
4 Pump rack
5 Top mounting bracket
12 Crane foot
13 Crane with winch and lifting cable
15 Lifting cable incl. cable clamp
17 Cable clamp
18 Cable sock, incl. shackle 10
19 Intermediate mounting bracket
23 Connection flange
13
5
17
15
23
1
1
2
19
12
18

9
English (US)
6.2 Torque values
All nuts and screws used for the installation must be made of
stainless steel.
Use grease (Alu-paste) together with a spring washer or lock nut;
otherwise, use Loctite or a similar product for lubrication and
locking.
All stainless-steel nuts and screws should be tightened to the
following torquevalues:
When mounting the hub/propeller, use lock washer (pos. 1107),
and tighten the two shaft nuts (pos. 1106) to a torque of
37 lbf.ft (50 Nm). See fig. 5.
Fig. 5 Shaft nuts on propeller shaft
6.3 Installation instructions
See section 6.2 Torque values and fig. 4.
1. Weld the connection flange to the cast-in pipe end in the tank.
2. Weld the profile section to the connection flange and pipe end.
Place it in position 12 o'clock.
Fig. 6 Profile section on connection flange
3. SRP.xx.32.xx: Weld the guide claws to the connection flange.
See fig. 7.
Fig. 7 Position of guide claws
4. Drill the holes for the mounting screws for the top mounting
bracket in the concrete.
5. Mount the screws and fit the top mounting bracket.
6. Depending on the length of the guide rail, weld the turnable
part of an intermediate mounting bracke (pos.19, fig. 4) to the
guide rail.
Fig. 8 Top mounting
7. Position and align the guide rail with the profile section on the
connection flange. Shorten the column profile (pos. 2) to the
correct length to match the position of epoxy insulator (pos. C)
at the top mounting bracket. A gap of 0.2 to 0.4 in (5 to 10 mm)
between collar of epoxy and guide rail is optimal.
See fig. 8.
8. Remove the epoxy insulator and the turnable metal part by
removing the center screw (pos. A) and the two mounting
screws (pos. B).
9. Adapt the outside of the square epoxy insulator to the inside of
the guide rail. The epoxy insulator must fit tightly inside the
guide rail.
10.Place the guide rail on the profile section on the connection
flange and mount the top end with the epoxy insulator and the
turnable metal part on the already installed top mounting
bracket. Tighten the three screws (pos. A) and (pos. B) in the
desired position.
11.Fit an intermediate mounting bracket to the turnable part
welded on to the profile tube in step 6. Drill holes in the tank
wall, fit screws in the bracket and tightening the screws.
12.Drill the holes for the mounting screws for the crane foot in the
concrete.
13.Mount the crane foot and fit and tighten the screws.
Screws F-Class 70
[lbf.ft (Nm)] Screws F-Class 80 [lbf.ft (Nm)]
M6 6.5 (8.8) 8.7 (11.8)
M8 15.8 (21.4) 21.2 (28.7)
M10 32.5 (44) 42.8 (58)
M12 54.6 (74) 73.8 (100)
M16 135 (183) 180.7 (245)
M20 273 (370) 364.4 (494)
TM04 4448 1309TM04 9305 3810
1106
1107
2.5x2.5x1/8 in
A
C
B
D
TM03 3028 0106
TM04 2719 2908
C
A
B31

English (US)
10
14.Mount the lifting cable (pos. 15, fig. 4) on the pump rack using
the shackle. See fig. 9.
Fig. 9 Mounting of lifting cable on the pump rack
15.Mount the top end of the safety cable in hole (pos. 31, fig. 8) of
the top mounting bracket by means of a shackle. The other
end of the safety cable ends in a shackle through which the
lifting cable must run.
Fig. 10 Safety cable
16.Fix the power cable to the lifting cable by means of a cable
clamp approx. 2.5 ft (0.8 m) above the pump. This will prevent
the cable from falling down and becoming entangled in the
propeller during operation. Connect the cable clamp to the
lifting cable above the cable clamp by means of a snap hook.
See fig. 11. Attach the power cable to the lifting cable by
means of cable clamps placed at 3 ft (1 m) intervals.
Fig. 11 Attaching the power cable to the lifting cable
17.Position the crane in the foot and mount the lifting cable in the
drum of the winch.
18.Lift the complete pump (pump rack with motor) using the crane
and slide it over the guide rail.
19.Slowly lower the pump into the tank and down to position on
the connection flange.
20.Mount the cable sock (pos. 18) to the top mounting bracket
using the shackle, and pull the motor cable through it to the
desired position. See fig. 12. The power cable should be
slightly tightened.
Fig. 12 Top mounting bracket with lifting and safety cables and
cable sock
21.Dismantle the lifting cable from the winch and fit it to the wire
clamping (pos. 20) on the top mounting bracket.
Use the lifting cable as a relief for the power cable. For this
reason, the lifting wire must always be tightened.
22.Connect the power cable to the terminals in the control
cabinet.
TM04 4006 0509
TM04 3932 0409
TM02 4938 1802
Caution
Always leave at least three turns of cable on the
drum. Otherwise the cable may break loose from
the drum attachment.
15
Power cable
Cable clamp
Lifting cable (15)
Snap hook
Cable clamp (17)
Note
Note
Consider and follow the separate installation and
operating instructions for cranes.
TM04 3929 0409
Caution
Dismantle the lifting cable from the crane before
starting the pump.
Warning
Make sure the power supply to the control
cabinet has been switched off.
20
18
31
B

11
English (US)
7. Electrical connection
The electrical connections must be carried out by a qualified elec-
trician in accordance with local regulations.
All national and local regulations relating to safety and accident
prevention must be observed.
The supply voltage and frequency are marked on the pump
nameplate. Make sure that the pump is suitable for the power
supply available at the installation site.
The SRP pump is supplied complete with a power power cable of
30 ft (10 meters), 50 ft (15 meters), or 80 ft (25 meters) as
standard.
The motor is marked either with a Y (star) or a Δ(delta)on motor
nameplate. The right connection has to be made in the external
control panel, using conductors 1 to 6 of the power cable.
Figure 13 shows a schematic drawing of these star and delta
connections. See also section 7.5 Wiring diagrams.
Three-phase motors
Fig. 13 Schematic drawing of delta and star connection
7.1 Motor protection
The pumps are provided with the following type of motor
protection:
Standard SRP pumps incorporate three bimetallic thermal
switches (PTO = Protection Thermique á Ouverture). See fig. 16.
(PTC sensors are available on request).
Function of thermal switches (PTO)
The motor is protected against overheating by three thermal
switches (PTO) connected in series, one switch in each winding.
When the maximum winding temperature is reached, the switch
will open the circuit and stop the motor.
When the windings have cooled to normal temperature, the
switch will close the circuit and the motor can be restarted.
See notes in fig. 16, section 7.5 Wiring diagrams.
Thermal switches (F6)
• Two conductors (terminals 11 and 12).
• Maximum operating voltage of switch: 250 V.
Maximum switching current: 2.5 A at cos φ= 1.
• Cut-out temperature: 302 °F (150 °C).
Function of PTC sensors
Optional the motor can be protected against overheating by three
thermal sensors connected in series, one in each winding.
When overheated, the motor will stop. Automatic restarting is not
permitted in such cases. This requires a thermistor trigger unit
with a reconnection suppressor in the control circuit of the motor
contactor.
See wiring diagram in fig. 17, section 7.5 Wiring diagrams.
1, 2, 3: PTC sensors:
• Two conductors (terminals 31 and 32).
• Maximum voltage at the terminals: Umax. = 2.5 V (AC/DC).
• Resistance between terminals 31 and 32:
- at room temperature R = 150 Ωto 750 Ω.
- at cut-out temperature 266 °F (130 °C) R ≥4000 Ω.
Warning
Before making any electrical connections, make
sure that the fuses have been removed or the
mains switch has been switched to off. Make sure
that the power supply cannot be accidentally
switched on.
TM02 4953 2002
W2
U1
U2
V1
V2
W1
L1 L2 L3
W2
U1
U2
V1
V2
W1
L1 L2 L3
Note
Note
When the connection at terminals 31 and 32 is
tested, the test voltage must not exceed 2.5 V
(AC/DC).
Use an ohmmeter for the test.

English (US)
12
7.2 Gearbox protection
The gearbox is monitored for the ingress of water by a leak
sensor incorporated in the gearbox.
If the monitoring function is required, the leak sensor must be
connected to a Grundfos relay, type ALR 20. If the gearbox/shaft
seal housing is not monitored for the ingress of water, it is
recommended to make inspection every 6 months. If oil is
contaminated by water replace shaft seal.
For longer distance, use an additional, screened cable.
An external alarm indicator, if any, must be connected to the
potential-free outputs, terminals 1 and 3 or 4, respectively.
Maximum load: 250 V, 5 A.
Leak sensor
• Two conductors (terminals 21 and 22).
• Operating voltage: Approx. 12 V.
• Current: 1 to 10 mA.
To adjust the sensitivity of the ALR-20/A relay, proceed as
follows:
1. Turn adjusting screw (pos. a) on the relay until indicator light
(pos. b) illuminates.
2. Turn the adjusting screw in the opposite direction until the
indicator light goes out.
3. Continue to turn the adjusting screw 60 °
(same direction as in step 2).
Fig. 14 Adjusting the relay
Fig. 15 ALR 20 relay connections
7.3 Overload relays
The motor must be protected against overload via a thermal delay
relay according to local regulations. The relay must be adjusted
to the rated current stated on the nameplate.
Electro-thermal all-pole triggers in all six mains conductors
(U1, V1, W1 and U2, V2, W2).
7.4 Starting method
In general it is advisable to use Soft-start or Variable speed drive,
in order to lower wear and tear on the equipment.
Continuous operation
The SRP recirculation pumps can be started via direct starting.
Intermittent operation
The SRP pump can be started via direct starting, prerequisite that
the maximum number of start per hour is not exceeded. In order
to limit wear and tear on the equipment, it is recommended that
the SRP pump has to be started using either Soft-starter or
Variable speed drive.
Note
Note
The cable between the relay and the pumps must
be maximum 164 ft (50 m).
TM02 8866 0904
ALR 20/A
57
Netz 230V 40-60Hz P3VA
Rel. Ue 400V le 2.5A AC15
2104 1 3
A1 A2
Netz Rel.
a
b
TM03 2060 3505
Note
Note
Do not check the leak sensor with an ohmmeter
or other measuring instruments. The leak sensor
is an electronic component.
2104 1 3
A1 A2
arnold ag
Lecksonden Relais
Netz 230V 50-60Hz P3VA
II (2)G [EEx ib] IIC
nur für den Anschluss von ArnoldAG
Lecksonden Typ AL05 Ex
Schaltpunkt Storung
ALR 20/A Ex
SEV 05 ATEX 0131
1258
57
Sonde
Rel.
Netz
CH - 6105 Schachen
A Grundfos Company
Sensor
L N
5 A 250 V

13
English (US)
7.5 Wiring diagrams
Fig. 16 Three thermal switches (PTO, bimetallics)
Fig. 17 Three PTC sensors
7.6 Direction of rotation
When the electrical connections have been carried out,
check that the propeller is rotating in the correct direction.
When viewed from the motor, the propeller should rotate
clockwise.
An arrow on the motor housing shows the correct direction of
rotation.
If the propeller rotates in the wrong direction, interchange two
phases of the mains supply (L1, L2, L3).
7.7 Protection from electro-chemical corrosion
Two different metals or alloys cause electro-chemical corrosion if
they are connected by an electrolyte. This applies if more than
one pump is installed in the same tank. We recommend the
following additional protection:
• galvanic separation of the earth conductor from the neutral
conductor or
• galvanic separation of the mains supply by means of an
isolation transformer.
The earth conductor must be separated in such a way as to
ensure that no direct current can flow through it. It must still
function as a protective conductor. This can be achieved with a
limiting unit (polarization cell or anti-parallel diode) or an isolation
transformer.
Fig. 18 Protection from electro-chemical corrosion
7.8 Frequency converter operation
The SRP pumps are designed for frequency converter operation
in the 40 to 60 Hz range. However the SRP pumps can run down
to 10 Hz in min frequency, having sufficient cooling in mind.
TM02 4940 1802
Terminals Description
1, 2, 3, 4, 5, 6 Ends of the three stator windings
(U1, U2, V1, V2, W1, W2)
11, 12 Thermal switches (F6)
21, 22 Leak sensor in gearbox (B)
TM02 4932 1802
Terminals Description
1, 2, 3, 4, 5, 6 Ends of the three stator windings
(U1, U2, V1, V2, W1, W2)
31, 32 PTC sensors (according to DIN 44 081)
(1, 2, 3)
21, 22 Leak sensor in gearbox (B)
B
LSV2U2W2W1V1U1 PEPTO
LSV2U2V1U1 W2W1 PTC PE
TM02 9480 2704
Pos. Designation
1 Limiting unit
2 Earth conductor
3 Isolation transformer
Warning
When using an isolation transformer, the ratio
between starting current and rated current (IA/IN)
must not be altered.
L1
L2
L3
N
PE
1
3
2
2

English (US)
14
8. Start-up
Check the oil level in the gearbox before starting up the pump.
The oil level must cover between 50 % and 75 % of the gearbox.
If required, fill oil into the gearbox through the oil filling hole
(pos. 2). For oil quality and quantity, see section 9.3 Oil.
If the pump has been in stock for a period before start-up,
see section 9.2 Service chart.
Fig. 19 Oil check and oil filling
Checks before start-up
1. Check that thepropeller is rotating in the correct direction.
See section 7.6 Direction of rotation.
2. Make sure that the pump is completely submerged in the
liquid.
3. Make sure that there are no solid objects in the tank.
9. Service
Before starting any work on a pump used in liquids which could
constitute a hazard to health, thorough cleaning/venting of the
pump, tank, etc. must be carried out according to local
regulations.
9.1 Contaminated pump
If Grundfos is requested to service the pump, Grundfos must be
contacted with details about the pumped liquid, etc. before the
pump is returned for service. Otherwise Grundfos can refuse to
accept the pump for service.
Possible costs of returning the pump are paid by the customer.
However, any application for service (no matter to whom it may
be made) must include details about the pumped liquid if the
pump has been used for liquids which are injurious to health or
toxic.
Warning
When loosening the oil level screw, note that
pressure may have built up in the chamber.
Do not remove the screw until the pressure has
been fully relieved.
TM02 9479 2704
Caution
The pump must always be submerged during
operation.
Warning
Make sure that no persons can fall into the tank.
13
2
Warning
Before starting work on the pump, make sure that
the fuses have been removed or the mains switch
has been switched to off. Make sure that the
power supply cannot be accidentally switched
on.
All rotating parts must have stopped moving.
Warning
If a pump has been used for a liquid which is
injurious to health or toxic, it will be classified as
contaminated.

15
English (US)
9.2 Service chart
Type Service instructions Lubrication Inspection
Electric motor All
Keep the motor housing clean
(otherwise cooling can be
affected).
The motor housing may only be
dismantled by authorized
Grundfos personnel.
The roller bearings are
maintenance-free. They should be
replaced if they get noisy.
For motors filled with dielectric oil,
oil level check and oil change are
not required.
Power cable All
The power cable must be checked
twice a year for surface damage,
strain, kinks, etc. If damaged,
the cable must be replaced.
Gearbox All Check the gearbox for leaks
twice a year.
Change the oil after 500 operating
hours.
Then every 8,000 operating hours
or after one year of operation.
Check lip seals, speedy sleeve and
wear ring and replace them, if
worn.
If the oil contains water,
replace the mechanical shaft seal.
Check the oil level twice a year.
If refilling is required.
See section 9.3.1 Oil quality.
Propeller All
Check the propeller regularly for
wear and tear. Remove any
material wound round the
propeller, such as ropes, threads,
etc. which may cause uneven
running and oscillation of the
installation. In case of strong
turbulence, cleaning is absolutely
necessary.
Winch All Spray the winch with a protective coating of oil at regular intervals
to prevent corrosion.
The gear teeth and the bearing
bushes must be lubricated twice a
year with an all-purpose grease.
Lifting cable All Regular oiling or greasing
increases the life of the cable.
Check the cable regularly and
always before using the winch.
Replace the cable, if required.
Screws All Always check that all screws in the pump rack are properly
tightened.

English (US)
16
9.3 Oil
9.3.1 Oil quality
Gear oil designation for SRP pumps according to DIN 51502:
ISO VG 68.
For unobstructed operation Shell Omala oil is recommended.
9.3.2 Oil quantity
9.4 Oil change
Place the pump in a horizontal position on supports and place a
pan underneath to collect the oil.
4. Remove screw (pos. 2). See fig. 20.
5. Loosen and remove oil drain screw (pos. 1), and allow the oil
to drain from the chamber into a glass. Leave the oil in the
glass for approx. 10 minutes and check if it contains water.
If the oil contains water, the shaft seal must be replaced.
6. Clean and refit the oil drain screw (pos. 1).
7. Fill oil into the oil chamber through the filling hole (pos. 2).
Quantity according to section 9.3.2 Oil quantity.
8. Refit screw (pos. 2).
Fig. 20 Position of oil drain and oil filling screws
Type Gearbox
[oz (l)]
SRP.11.12.524.
40.5 (1.2)
SRP.15.12.628.
SRP.19.12.720.
SRP.26.12.805.
SRP.30.12.883.
SRP.40.12.513.
SRP.55.12.607.
SRP.75.12.722.
SRP.95.12.805.
SRP.48.20.254.
SRP.68.20.299.
SRP.95.20.363. 84.5 (2.5)
SRP.136.20.406. 84.5 (2.5)
SRP.95.32.260. 84.5 (2.5)
SRP.163.32.308.
SRP.204.32.334. 135.3 (4.0)
SRP.176.32.355. 84.5 (2.5)
SRP.272.32.374.
135.3 (4.0)
SRP.245.32.381.
SRP.326.32.418.
SRP.245.32.422.
Warning
When loosening the oil level screw, note that
pressure may have built up in the chamber.
Do not remove the screw until the pressure has
been fully relieved.
Note
Note
Used oil must be disposed of in accordance with
local regulations.
TM029479 2704
13
2

17
English (US)
10. Fault finding
Warning
Before starting any work on the pump, make sure that the fuses have been removed or the mains switch has been
switched to off. Make sure that the power supply cannot be accidentally switched on.
All rotating parts must have stopped moving.
Fault Cause Remedy
1. The pump does not
start. a) No power supply or supply failure. Call an electrician.
b) Power cable is faulty. Call an electrician.
c) Control system is faulty. Call an electrician.
d) Propeller cannot rotate freely. Clean the propeller and check manually that it can
rotate freely.
e) Stator windings are faulty. Contact Grundfos.
f) Motor has cut out because of overheating. Wait until the motor has cooled and attempt to
restart the pump.
g) Different phase voltages. Call an electrician.
h) Overload relay is set too low or is faulty. Check the overload relay. Set the relay to the
rated current. See section 7.3 Overload relays.
i) Leak sensor has cut out the pump. Contact Grundfos.
j) Humidity in motor. Contact Grundfos.
2. Pump starts, but
stops immediately. a) Stator windings are faulty. Contact Grundfos.
b) Different phase voltages. Call an electrician.
c) Overload relay is set too low or is faulty. Check the overload relay. Set the relay to the
rated current. See section 7.3 Overload relays.
d) Leak sensor has cut out the pump. Contact Grundfos.
e) Humidity in motor. Contact Grundfos.
3. No liquid or inade-
quate quantity is
pumped even if the
motor is running.
a) Propeller rotates in the wrong direction. Interchange two phases of the mains supply.
b) Pump runs on two phases. 1. Check the electrical connections.
2. Replace faulty fuses.
3. Call an electrician.
c) Internal parts are worn. Contact Grundfos.
d) Propeller dirty or damaged. Clean the propeller and inspect for any wear.
4. Pump runs unevenly
and makes noise. a) Internal parts are worn. Contact Grundfos.
b) Propeller dirty or damaged. Clean the propeller and inspect for any wear.
c) Faulty motor or gearbox roller bearings. Contact Grundfos.
d) Oscillations caused by the installation (resonance). Check installation design.
5. High current and
power consumption. a) Wrong voltage supply or supply failure. Call an electrician.
b) Power cable is faulty. Call an electrician.
c) Control system is faulty. Call an electrician.
d) Propeller cannot rotate freely. Clean the propeller and check manually that it can
rotate freely.
e) Stator windings are faulty. Contact Grundfos.
f) Pump runs on two phases. 1. Check the electrical connections.
2. Replace faulty fuses.
3. Call an electrician.
g) Internal parts are worn. Contact Grundfos.
h) Faulty motor or gearbox roller bearings. Contact Grundfos.

English (US)
18
11. Technical data
11.1 Motor
11.2 Gearbox
11.3 Shaft seals
11.4 Propeller
11.5 Sound pressure level
The sound pressure level of the pump is lower than 70 dB(A).
12. Disposal
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.
Voltage tolerance - 10 %/+10 % of nameplate value
Maximum installation
depth 66 ft (20 m) below the liquid surface
Maximum number of
starts per hour 20
Enclosure class IP68
Insulation class F
Material, motor housing Cast iron (ASTM A48 Class 40B
epoxy-coated)
Ambient temperature 41 °F to 104 °F (5 °C to +40 °C)
Type Planetary gearbox
Gears Hardened and ground steel
Monitoring of shaft seal Leak sensor incorporated in gearbox
Drive-end bearings Two tapered roller bearings
Material, gear casing Cast iron (ASTM A48 Class 40B
epoxy-coated)
SRP Two lip seals and one mechanical shaft seal made of
tungsten carbide/tungsten carbide or SiC/SiC
Number of blades 3
Rated diameter SRP.xx.12.xxx SRP.xx.20.xxx
SRP.xx.32.xxx
12 in (300 mm)
20 in (500 mm)
32 in (800 mm)
Construction Self-cleaning, optimum flow design
Material Stainless steel AISI 316
Subject to alterations.

Appendix
49
Appendix
1. Dimensions and weight
Pump
TM02 9450 2604
Pump type P2
[hp]
A
[in
(mm)]
B
[in
(mm)]
C
[in
(mm)]
D
[in
(mm)]
E
[in
(mm)]
F
[in
(mm)]
G
[in
(mm)]
H
[in
(mm)]
Weight
[lb (kg)]
SRP.11.12.524. 1.1
33-3/8
(848) 23-5/8 (602) 29 (736) 22-1/2 (571) 2-9/16 (66) 17-1/2 (445) 8-5/8 (220) 9/16 (15)
242.5 (110)
SRP.15.12.628. 1.5 242.5 (110)
SRP.19.12.720. 1.9 242.5 (110)
SRP.26.12.805. 2.6 242.5 (110)
SRP.30.12.883. 3.0 242.5 (110)
SRP.40.12.513. 4.0 242.5 (110)
SRP.55.12.607. 5.5 242.5 (110)
SRP.75.12.722. 7.5 264.6 (120)
SRP.95.12.805. 9.5 264.6 (120)
SRP.48.20.254. 4.8 35-7/8
(910) 32-7/8 (835) 29-7/8 (757) 32-3/8
(824) 2-9/16 (66) 26-3/8 (670) 9-1/16 (230) 1 (25)
441 (200)
SRP.68.20.299. 6.8 441 (200)
SRP.95.20.363. 9.5 44-1/16
(1119) 33-5/8 (855) 39-1/8 (996) 529.1 (240)
SRP.136.20.406. 13.6 551.2 (250)
SRP.95.32.260. 9.5 44-1/2
(1129) 48-5/8 (1237) 39-9/16 (1006)
48-1/4
(1225) 2-9/16
(66) 40 (1015) 10-1/2 (267) 1 (25)
771.6 (350)
SRP.163.32.308. 16.3 793.7 (360)
SRP.204.32.334. 20.4 46-1/2
(1181) 49-1/2 (1257) 41-5/8 (1058) 892.9 (405)
SRP.176.32.355. 17.6 44-1/2
(1129) 48-5/8 (1237) 39-9/16 (1006) 793.7 (360)
SRP.272.32.374. 27.2 46-1/2
(1181) 49-1/2 (1257) 41-5/8 (1058)
948 (430)
SRP.245.32.381. 24.5 892.9 (405)
SRP.326.32.418. 32.6 948 (430)
SRP.245.32.422. 24.5 892.9 (405)

Grundfos companies
USA
GRUNDFOS Pumps Corporation
17100 West 118th Terrace
Olathe, Kansas 66061
Phone: [phone]
Telefax: [phone]
USA
Yeomans Chicago
Corporation
3905 Enterprise Court
IL 60504 Aurora
Phone: [phone]
Telefax: ([phone]
Canada
GRUNDFOS Canada Inc.
2941 Brighton Road
Oakville, Ontario
L6H 6C9
Phone: [phone]
Telefax: [phone]
México
Bombas GRUNDFOS de México S.A. de C.V.
Boulevard TLC No. 15
Parque Industrial Stiva
Aeropuerto
Apodaca, N.L.C.P. 66600
Phone: [phone]
Telefax: [phone]