Grundfos SRP User manual

GRUNDFOS INSTRUCTIONS
SRP
60 Hz
Installation and operating instructions

SRP
Table of contents
3
English (GB)
Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Español (ES)
Instrucciones de instalación y funcionamiento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Português (PT)
Instruções de instalação e funcionamento. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
繁體中文 (TW)
安裝操作手冊 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
한국어 (KO)
설치 및 작동 지침 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Appendix 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

English (GB)
4
English (GB) 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.

English (GB)
5
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this booklet
2. General description
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 (S1).
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 %.
1. Symbols used in this booklet 5
2. General description 5
2.1 Applications 5
2.2 Technical data 6
3. Identification 6
3.1 Type key 6
3.2 Nameplate 6
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 7
6.1 Positioning 7
6.2 Torques 8
6.3 Installation instructions 8
7. Electrical connection 10
7.1 Motor protection 10
7.2 Gearbox protection 11
7.3 Overload relays 11
7.4 Starting method 11
7.5 Wiring diagrams 11
7.6 Direction of rotation 12
7.7 Protection from electro-chemical corrosion 12
8. Start-up 12
9. Service 12
9.1 Contaminated pump 12
9.2 Service chart 13
9.3 Oil 14
9.4 Oil change 14
10. Fault finding 15
11. Technical data 16
11.1 Motor 16
11.2 Gearbox 16
11.3 Shaft seals 16
11.4 Impeller 16
11.5 Sound pressure level 16
12. Disposal 16
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
mental 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
Notes or instructions that make the job easier
and ensure safe operation.
TM03 0374 3308
Pos. Description
4Pumprack
7Motor
8Gearbox
10 Impeller
22 Hydraulic inlet
Liquid temperature 5 to 40 °C
pH value 4-10
Maximum sludge index 125 ml/g
Maximum dynamic viscosity 500 mPas
Maximum density 1060 kg/m3*
Chloride content ≤200 mg/l
(stainless steel 1.4301)
22 4710
8

English (GB)
6
2.2 Technical data
3. Identification
3.1 Type key
3.2 Nameplate
Fig. 2 Nameplate
The nameplate is on the motor housing. The details on the
nameplate are required for ordering of spare parts.
The additional nameplate supplied with the pump should be fixed
in a visible position at the installation site.
Voltage tolerance 3 x 380 V - 5 %/+ 10 %, 60 Hz
3 x 440-480 V - 10 %/+ 10 %, 60 Hz
Enclosure class IP68
Insulation class F
Maximum installation depth 20 m below liquid level
Maximum number of starts
per hour 20
Length of supply cable 10, 15, 25 m
Wire length on all winches 10, 15, 25 m
Example SRP 70. 80. 260. 11. 6. 1K A
Type range
SRP: Submersible recirculation pump
Motor output power, P2
P2: Code from type designation/10 [kW]
70: 7 kW
Impeller diameter [cm]
80: 80 cm
Impeller speed [min-1]
260: 260 min-1
Impeller blade pitch [°]
11: 11 °
Explosion protection
[-]: Non-explosion-proof
Ex: Explosion-proof
Frequency
5: 50 Hz
6: 60 Hz
Voltage and starting method
0K: 380 V, DOL
1K: 380 V, Y/D
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
TM03 0315 3310
Pos. Description
1 Type designation
2 Production code
3 Impeller 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 (impeller)
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
Type
P.c.
P1/P2
Cos.
Model
mm
A
Hz
°c
ø
I
N
n
N
Pol
T
Prod.No:
96257011
See MANUAL!
CH-6105 Schachen
Insul.class:
No:
IP
U V
I
start
Weight kg
/minA
15 1214 13
1234 567
18
17
16
19
kW
m
9
10
11
8

English (GB)
7
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 protection 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 company.
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.
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 wire
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 pumps are installed in the same tank, they must not
generate opposite flows.
• The distance from the centre of the pump to the tank bottom
(Hmin) must be equal to the impeller 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 impeller diameter.
– For pumps without vortex shield, the distance must at least
be equal to 1.5 times the impeller diameter. See fig. 3.
Fig. 3 Distance to liquid surface and tank bottom
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.
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.
Note
Never hang the pump by the supply cable.
Never let the pump run while hanging in the
lifting equipment.
TM02 9478 2704
Hmin HAbove

English (GB)
8
Fig. 4 Open installation
* Guide claws are only available for SRP.xx.80.
6.2 Torques
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 torques:
When mounting the hub/impeller, use lock washer (pos. 1107),
and tighten the two shaft nuts (pos. 1106) to a torque of 50 Nm.
See fig. 5.
Fig. 5 Shaft nuts on impeller shaft
6.3 Installation instructions
See section 6.2 Torques 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.80.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 fixation
bracket in the concrete.
5. Mount the screws and fit the top fixation bracket.
6. Depending on the length of the column profile, weld the
turnable part of an intermediate fixation bracket (pos. 19,
fig. 4) to the column profile.
Fig. 8 Top fi xa t io n
TM04 3962 0509
Pos. Designation
1Bottom fixation bracket and guide claws on
connection flange *
2 Column profile
4 Pump rack
5 Top fixation bracket
12 Crane foot
13 Crane with winch and lifting wire
15 Lifting wire incl. wire clamp
17 Cable clamp
18 Cable sock, incl. shackle ∅10
19 Intermediate fixation bracket
23 Connection flange
Screws F-Class 70
[Nm] Screws F-Class 80 [Nm]
M6 8.8 11.8
M8 21.4 28.7
M10 44 58
M12 74 100
M16 183 245
M20 370 494
13
5
17
4
15
23
1
1
2
19
12
18
TM04 4448 1309TM03 0572 4110TM03 3028 0106
TM04 2719 2908
1106
1107
C
A
B31

English (GB)
9
7. Position and align the column profile with the profile section on
the connection flange. Shorten the column profile (pos. 2,
fig. 4) to the correct length to match the position of epoxy
insulator (pos. C) at the top fixation bracket. A gap of 5 to
10 mm between collar of epoxy and column profile is optimal.
See fig. 8.
8. Remove the epoxy insulator and the turnable metal part by
removing the centre screw (pos. A) and the two fixation
screws (pos. B).
9. Adapt the outside of the square epoxy insulator to the inside of
the column profile. The epoxy insulator must fit tightly inside
the column profile.
10.Place the column profile 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 fixation bracket. Tighten the three screws (pos. A) and
(pos. B) in the desired position.
11.Fit an intermediate fixation 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.
14.Mount the lifting wire (pos. 15, fig. 4) on the pump rack using
the shackle. See fig. 9.
Fig. 9 Mounting of lifting wire on the pump rack
15.Mount the top end of the safety wire to the hole (pos. 31,
fig. 8) of the top fixation bracket by means of a shackle. The
other end of the safety wire ends in a shackle through which
the lifting wire must run.
Fig. 10 Safety wire
16.Fix the supply cable to the lifting wire by means of a cable
clamp approx. 0.8 m above the pump. This will prevent the
cable from falling down and becoming entangled in the
impeller during operation. Connect the cable clamp to the
lifting wire above the wire clamp by means of a snap hook.
See fig. 11. Attach the supply cable to the lifting wire by means
of cable clamps placed at 1 m intervals.
Fig. 11 Attaching the supply cable to the lifting wire
17.Position the crane in the foot and mount the lifting wire in the
drum of the winch.
18.Lift the complete pump (pump rack with motor) using the crane
and slide it over the column profile.
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 fixation bracket
using the shackle, and pull the motor cable through it to the
desired position. See fig. 12. The supply cable should be
slightly tightened.
Fig. 12 Top fixation bracket with lifting and safety wires and
cable sock
21.Dismantle the lifting wire from the winch and fit it to the wire
clamping (pos. 20) on the top fixation bracket.
Use the lifting wire as a relief for the supply cable. For this
reason, the lifting wire must always be tightened.
22.Connect the supply cable to the terminals in the control
cabinet.
TM04 4006 0509
TM04 3932 0409
15
TM02 4938 1802
Caution
Always leave at least three turns of wire on the
drum. Otherwise the wire may break loose from
the drum fixation.
Note
Consider and follow the separate installation and
operating instructions for cranes.
TM04 3929 0409
Caution
Dismantle the lifting wire from the crane before
starting the pump.
Warning
Make sure the power supply to the control
cabinet has been switched off.
Supply
cable
Wire clamp
Lifting wire (15)
Snap hook
Cable
clamp (17)
20
18
31
B

English (GB)
10
7. Electrical connection
The electrical connections must be carried out by a qualified
electrician in accordance with local regulations.
All national and local regulations relating to safety and accident
prevention must be observed.
The pump is designed for frequency converter operation in the 30
to 50 or 40 to 60 Hz range, depending on the rated frequency. If
sufficiently cooled, however, the pump can run at a minimum
frequency of 10 Hz.
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 pump is supplied complete with a supply cable of 10, 15 or
25 metres.
The motor is marked either with a Y (star) or Δ(delta). Make this
connection in an external control panel using conductors 1 to 6 of
the supply cable.
Fig.13 shows a schematic drawing of these star and delta
connections. See also section 7.5 Wiring diagrams.
If the pump is connected in delta during operation, the pump can
be started in star-delta starting.
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 PTO thermal
switches (PTO = Protection Thermique á Ouverture). See fig. 16.
Function of thermal switches
The motor is protected against overheating by three thermal
switches 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.
Manual restarting is necessary.
See wiring diagram 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.
• Cutting-out temperature: 150 °C.
Function of PTC sensors
The motor is 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.
ϑ1, ϑ2, ϑ3: 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 to 750 Ω.
- at cutting-out temperature (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
StarDelta
Note
For transmission tests at terminals 31 and 32, the
test voltage must not exceed 2.5 V (AC/DC).
Use an ohmmeter for the test.