SP
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
Other languages
http://net.grundfos.com/qr/i/98074911
English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. Introduction
These instructions apply to Grundfos submersible pumps,
type SP, with submersible motors, types Grundfos MS/MMS or
Franklin 4"-8".
If the pump is fitted with a motor of another motor make than
Grundfos MS or MMS, note that the motor data may differ from
the data stated in these instructions.
3. Delivery and storage
3.1 Delivery
When the pump part and motor are supplied as separate units
(long pumps), fit the motor to the pump as described in section
7.1 Fitting the motor to the pump.
Do not expose the pump to unnecessary impact and shocks.
3.2 Storage
Storage temperature
Pump: -20 °C to +60 °C.
Motor: -20 °C to +70 °C.
The motors must be stored in a closed, dry and well ventilated
room.
The pump should not be exposed to direct sunlight.
If the pump has been unpacked, it should be stored horizontally,
adequately supported, or vertically to prevent misalignment of the
pump. Make sure that the pump cannot roll or fall over.
During storage, the pump can be supported as shown in fig. 1.
Fig. 1 Pump position during storage
3.2.1 Frost protection
If the pump has to be stored after use, it must be stored on a
frost-free location, or the motor liquid must be frost-proof.
1. Symbols used in this document
2
2. Introduction
2
3. Delivery and storage
2
3.1 Delivery
2
3.2 Storage
2
4. Applications
3
4.1 Pumped liquids
3
4.2 Sound pressure level
3
5. Preparations before installation
3
5.1 Checking the motor liquid
3
5.2 Positional requirements
5
5.3 Pump/motor diameter
5
5.4 Liquid temperatures/cooling
5
5.5 Pipe connection
6
6. Electrical connect ion
6
6.1 Frequency converter operation
7
6.2 Motor protection
7
6.3 Lightning protection
8
6.4 Cable sizing
8
6.5 Control of single-phase MS 402 motors
9
6.6 Connection of single-phase motors
9
6.7 Connection of three-phase motors
10
7. Installation
11
7.1 Fitting the motor to the pump
11
7.2 Removing and fitting the cable guard
12
7.3 Connecting the submersible drop cable
12
7.4 Riser pipe
12
7.5 Maximum installation depth below water level [m]
12
7.6 Cable clips
13
7.7 Lowering the pump
13
7.8 Installation depth
13
8. Startup and operation
13
8.1 Startup
13
8.2 Operation
14
9. Maintenance and service
14
10. Fault finding
15
11. Checking motor and cable
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
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.
Note
The USB stick supplied with the product contains
installation and operating instructions in various
languages.
Caution
The pump should remain in the packing until it is
placed in vertical position during installation.
Handle the pump with care.
Note
The extra nameplate supplied with the pump should
be fixed at the installation site.
Caution
If MMS motors are stored, the shaft must be turned
by hand at least once a month. If a motor has been
stored for more than one year before installation, the
rotating parts of the motor must be dismantled and
checked before use.
TM00 1349 2495
English (GB)
3
4. Applications
Grundfos SP submersible pumps are designed for a wide range
of water supply and liquid transfer applications, such as the
supply of fresh water to private homes or waterworks, water
supply in horticulture and agriculture, drawdown of groundwater
and pressure boosting, and various industrial jobs.
The pump must be installed so that the suction interconnector is
completely submerged in the liquid. The pump can be installed
horizontally or vertically. See section 5.2 Positional requirements.
4.1 Pumped liquids
Clean, thin, non-explosive liquids without solid particles or fibres.
The maximum sand content of the water must not exceed
50 g/m
3
. A larger sand content will reduce the life of the pump
and increase the risk of blockage.
If liquids with a viscosity higher than that of water are to be
pumped, contact Grundfos.
The pump versions SP A N, SP A R, SP N, SP R and SPE are
designed for liquids with higher aggressiveness than drinking
water.
The maximum liquid temperature appears from section 5.4 Liquid
temperatures/cooling.
4.2 Sound pressure level
The sound pressure level has been measured in accordance with
the rules laid down in the EC machinery directive 2006/42/EC.
Sound pressure level of pumps
The values apply to pumps submerged in water, without external
regulating valve.
Sound pressure level of motors
The sound pressure level of Grundfos MS and MMS motors is
lower than 70 dB(A).
Other motor makes: See installation and operating instructions
for these motors.
5. Preparations before installation
5.1 Checking the motor liquid
The motors are factory-filled with a special non-poisonous liquid
which is frost-proof down to -20 °C.
Refill liquid as described below.
5.1.1 Grundfos MS 4000 and MS 402 motors
The filling hole for motor liquid is placed in the following positions:
• MS 4000: in the top of the motor.
• MS 402: in the bottom of the motor.
1. Position the submersible pump as shown in fig. 2.
The filling screw must be at the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe until the
liquid runs back out of the filling hole. See fig. 2.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torques
• MS 4000: 3.0 Nm.
• MS 402: 2.0 Nm.
The submersible pump is now ready for installation.
Fig. 2 Motor position during filling - MS 4000 and MS 402
Caution
When pumping liquids with a density higher than that
of water, motors with correspondingly higher outputs
must be used.
Pump type L
pA
[dB(A)]
SP 1A < 70
SP 2A < 70
SP 3A < 70
SP 5A < 70
SP 7 < 70
SP 9 < 70
SP 11 < 70
SP 14 < 70
SP 17 < 70
SP 30 < 70
SP 46 < 70
SP 60 < 70
SP 77 < 70
SP 95 < 70
SP 125 79
SP 160 79
SP 215 82
Warning
Before starting work on the product, switch off the
power supply. Make sure that the power supply
cannot be accidentally switched on.
Note
Check the level of motor liquid and refill if required.
Use clean water.
Caution
If frost protection is required, special Grundfos liquid
must be used to refill the motor. Otherwise clean
water may be used for refilling (however, never use
distilled water).
TM00 6423 0606
MS 4000 MS 402
English (GB)
4
5.1.2 Grundfos MS 6000 motors
• If the motor is delivered from stock, check the level of motor
liquid before fitting the motor to the pump. See fig. 3.
• When pumps are delivered direct from Grundfos, the level has
already been checked.
• Check the level in connection with service. See fig. 3.
The filling hole for motor liquid is placed at the top of the motor.
1. Position the submersible pump as shown in fig. 3. The filling
screw must be at the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe until the
liquid runs back out of the filling hole. See fig. 3.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torque: 3.0 Nm.
The submersible pump is now ready for installation.
Fig. 3 Motor position during filling - MS 6000
5.1.3 Grundfos MMS 6, MMS 8000, MMS 10000 and
MMS 12000 motors
1. Place the motor at a 45 ° angle with the top of the motor
upwards. See fig. 4.
2. Unscrew the plug A and place a funnel in the hole.
3. Pour tap water into the motor until the motor liquid inside the
motor starts running out of A.
4. Remove the funnel and refit the plug A.
The submersible pump is now ready for installation.
Fig. 4 Motor position during filling - MMS
5.1.4 Franklin mot ors fro m 3 kW and u p
Check the level of motor liquid in Franklin 4" and 6" motors by
measuring the distance from the bottom plate to the built-in
rubber diaphragm. The distance can be measured by inserting a
rule or a small rod through the hole until it touches the diaphragm.
See fig. 5.
Fig. 5 Measuring the distance from bottom plate to
diaphragm
The table below shows the correct distance from the outside of
the bottom plate to the diaphragm:
Fig. 6 Franklin motors
If the distance is not correct, carry out an adjustment as
described in section 5.1.5 Franklin motors.
TM03 8129 0507
Caution
Do not use motor liquid as it contains oil.
Caution
Before fitting the motor to a pump after a long period
of storage, lubricate the shaft seal by adding a few
drops of water and turning the shaft.
TM03 0265 3605
45°
45°
A
Caution
Take care not to damage the diaphragm.
TM00 1353 5092
Motor Dimension
Distance
[mm]
Franklin 4", 0.25 - 3 kW
(fig. 6a)
A8
Franklin 4", 3 - 7.5 kW
(fig. 6b)
B16
Franklin 6", 4-45 kW
(fig. 6c)
C1 35
Franklin 6", 4-22 kW
(fig. 6d)
C2 59
TM00 6422 3695
6a 6b
6c 6d
English (GB)
5
5.1.5 Franklin motors
Check the level of motor liquid in Franklin 8" motors as follows:
1. Press out the filter in front of the valve at the top of the motor
using a screwdriver. If the filter is slotted, unscrew. Figure 7
shows the position of the filling valve.
2. Press the filling syringe against the valve and inject the liquid.
See fig. 7. If the valve cone is depressed too far, it may be
damaged thus causing the valve to leak.
3. Remove any air in the motor by pressing the point of the filling
syringe lightly against the valve.
4. Repeat the process of injecting liquid and releasing air until
the liquid starts running out or the diaphragm is in its correct
position (Franklin 4" and 6").
5. Refit the filter.
The submersible pump is now ready for installation.
Fig. 7 Position of filling valve
5.2 Positional requirements
Depending on motor type, the pump can be installed either
vertically or horizontally. A complete list of motor types suitable
for horizontal installation is shown in section 5.2.1 Motors suitable
for horizontal installation.
If the pump is installed horizontally, the discharge port should
never fall below the horizontal plane. See fig. 8.
Fig. 8 Positional requirements
If the pump is installed horizontally, e.g. in a tank, we recommend
that you fit it in a flow sleeve.
5.2.1 Motors suitable for horizontal installation
When Franklin 4" motors up to and including 2.2 kW are started
more than 10 times a day, we recommend that you incline the
motor at least 15 ° above the horizontal plane in order to minimise
wearing of the upthrust disc.
5.3 Pump/motor diameter
We recommend that you check the borehole with an inside
calliper to ensure unobstructed passage.
5.4 Liquid temperatures/cooling
The maximum liquid temperature and the minimum flow velocity
past the motor appear from the table below.
We recommend that you install the motor above the well screen
in order to achieve proper motor cooling.
If there is a risk of sediment build-up, such as sand, around the
motor, use a flow sleeve in order to ensure proper cooling of the
motor.
TM00 1354 5092
Warning
If the pump is to be installed in a position where it is
accessible, the coupling must be suitably isolated
from human touch. The pump can for instance be
built into a flow sleeve.
TM00 1355 5092
Allowed
Not allowed
Motor
Output power
50 Hz
Output power
60 Hz
[kW] [kW]
MS All All
MMS 6 5.5 - 37 5.5 - 37
MMS 8000 22-110 22-110
MMS 10000 75-190 75-190
MMS 12000 147-250 147-250
Caution
During operation, the suction interconnector of the
pump must always be completely submerged in the
liquid. Make sure that the NPSH values are fulfilled.
Warning
If the pump is used for pumping hot liquids (40 to 60
°C), make sure that persons cannot come into
contact with the pump and the installation, e.g. by
installing a guard.
Caution
In cases where the stated flow velocity cannot be
achieved, a flow sleeve must be installed.
English (GB)
6
5.4.1 Maximum liquid temperat ure
Out of consideration for the rubber parts in pump and motor, the
liquid temperature must not exceed 40 °C (~ 105 °F). See also
the table below.
The pump can operate at liquid temperatures between 40 °C and
60 °C (~ 105 °F and 140 °F) provided that all rubber parts are
replaced every third year.
5.5 Pipe connection
If noise may be transmitted to the building through the pipework,
we recommend that you use plastic pipes.
When using plastic pipes, secure the pump by an unloaded
straining wire.
When connecting plastic pipes, use a compression coupling
between the pump and the first pipe section.
6. Electrical connection
The supply voltage, rated maximum current and cos φ appear
from the loose data plate which must be fitted close to the
installation site.
The required voltage quality for MS and MMS motors, measured
at the motor terminals, is - 10 %/+ 6 % of the nominal voltage
during continuous operation (including variation in the supply
voltage and losses in cables).
Check also that there is voltage symmetry in the power supply
lines, i.e. same difference of voltage between the individual
phases. See section 11. Checking motor and cable, item 2.
If MS motors with a built-in temperature transmitter (Tempcon)
are not installed together with a MP 204 or similar Grundfos
motor protection, they must be connected to a 0.47 μF capacitor
approved for phase-phase operation (IEC 384-14) to meet the EC
EMC directive (2004/108/EC). The capacitor must be connected
to the two phases to which the temperature transmitter is
connected. See fig. 9.
Fig. 9 Connection of capacitor
The motors are wound for direct-on-line starting or star-delta
starting, and the starting current is between four and six times the
rated current of the motor.
The run-up time of the pump is only about 0.1 second.
Direct-on-line starting is therefore normally approved by the
power supply company.
Motor
Installation
Flow past
the motor
Vertical Horizontal
Grundfos
MS 402
MS 4000
MS 6000
0.15 m/s
40 °C
(~ 105 °F)
40 °C
(~ 105 °F)
Grundfos
MS 4000I*
0,15 m/s
60 °C
(~ 140 °F)
Flow sleeve
recommended
60 °C
(~ 140 °F)
Flow sleeve
recommended
Grundfos
MS 6000I*
1.00 m/s
Grundfos
MMS
0.15 m/s
25 °C
(~ 77 °F)
25 °C
(~ 77 °F)
0.50 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
Franklin
4"
0.08 m/s
30 °C
(~ 85 °F)
30 °C
(~ 85 °F)
Franklin
6" and 8"
0.16 m/s
30 °C
(~ 85 °F)
30 °C
(~ 85 °F)
* At an ambient pressure of minimum 1 bar (1 MPa).
Note
37 kW MMS 6, 110 kW MMS 8000 and 170 kW
MMS 10000: The maximum operational liquid
temperature is 5 °C lower than the values stated in
the above table.
190 kW MMS 10000: The temperature is 10 °C lower.
Note
We recommend plastic pipes for 4" pumps only.
Warning
Make sure that the plastic pipes are suitable for the
actual liquid temperature and the pump pressure.
Warning
During electrical installation, make sure that the
power supply cannot be accidentally switched on.
Warning
The electrical installation should be carried out by an
authorised person in accordance with local
regulations.
Warning
The pump must be earthed.
The pump must be connected to an external mains
switch with a minimum contact gap of
3 mm in all poles.
TM00 7100 0696
Colours of the leads
Lead Flat cable Single leads
1 = L1 Brown Black
2 = L2 Black Yellow
3 = L3 Grey Red
4 = PE Yellow/green Green
English (GB)
7
6.1 Frequency converter operation
6.1.1 Grundfos motors
Three-phase Grundfos motors can be connected to a frequency
converter.
If a temperature transmitter is required, Grundfos offers a Pt100
or Pt1000 sensor for the submersible motor.
To avoid damage to the pump part, the motor must stop when the
pump flow falls below 0.1 x nominal flow.
Depending on the frequency converter type, it may expose the
motor to detrimental voltage peaks.
We recommend that you protect other motors against voltage
peaks higher than 850 V.
The above disturbance can be abated by installing an RC filter
between the frequency converter and the motor.
Possible increased acoustic noise from the motor can be abated
by installing an LC filter which will also eliminate voltage peaks
from the frequency converter.
We recommend that you install an LC filter when using a
frequency converter. See section 6.7.6 Frequency converter
operation.
For further details, contact your frequency converter supplier or
Grundfos.
6.1.2 Other motor makes than Grundfos
Contact Grundfos or the motor manufacturer.
6.2 Motor protection
6.2.1 Single-phase motors
Single-phase MS 402 motors incorporate a thermal switch and
require no additional motor protection.
Single-phase MS 4000 motors must be protected. A protective
device can either be incorporated in a control box or be separate.
Franklin 4" PSC motors must be connected to a motor-protective
circuit breaker.
6.2.2 Three-phase motors
MS motors are available with or without a built-in temperature
transmitter.
The following motors must be protected by a motor-protective
circuit breaker with thermal relay, or a MP 204 and contactor(s):
• motors with a built-in and intact temperature transmitter
• motors with or without a defective temperature transmitter
• motors with or without a Pt100 sensor.
MMS motors have no built-in temperature transmitter.
The Pt100 and the Pt1000 sensor are available as an accessory.
6.2.3 Required settings of motor-protective circuit breaker
For cold motors, the tripping time of the motor-protective circuit
breaker must be less than 10 seconds at 5 times the rated
maximum current of the motor. During normal operating
conditions the motor must be running at full speed in less than
3 seconds.
In order to ensure optimum motor protection, the motor-protective
circuit breaker should be set as follows:
1. Set the motor-protective circuit breaker to the rated maximum
current of the motor.
2. Start the pump and let it run for half an hour at normal
performance.
3. Slowly grade down the scale indicator until the motor trip point
is reached.
4. Increase the setting by 5 %.
The highest permissible setting is the rated maximum current of
the motor.
For motors wound for star-delta starting, the motor-protective
circuit breaker should be set as above, but the maximum setting
should be rated maximum current x 0.58.
The highest permissible startup time for star-delta starting or
autotransformer starting is 2 seconds.
Caution
If an MS motor with temperature transmitter is
connected to a frequency converter, a fuse
incorporated in the transmitter will melt and the
transmitter will be inactive. The transmitter cannot be
reactivated. This means that the motor will operate
like a motor without a temperature transmitter.
Caution
The motor should not run at a frequency higher than
the rated frequency (50 or 60 Hz) during frequency
converter operation. In connection with pump
operation, never reduce the frequency (and
consequently the speed) to such a level that the
necessary flow of cooling liquid past the motor is no
longer ensured.
Warning
MS 402 motors for supply voltages up to and
including 440 V (see motor nameplate) must be
protected against voltage peaks higher than
650 V (peak value) between the supply terminals.
Warning
When the motor has been thermally switched off, the
motor terminals are still live. When the motor has
cooled sufficiently, it will restart automatically.
Caution
If this requirement is not met, the motor warranty will
be invalidated.
English (GB)
8
6.3 Lightning protection
The installation can be fitted with a special overvoltage protective
device to protect the motor from voltage surges in the power
supply lines when lightning strikes somewhere in the area.
See fig. 10.
Fig. 10 Fitting an overvoltage protective device
The overvoltage protective device will not, however, protect the
motor against a direct stroke of lightning.
The overvoltage protective device should be connected to the
installation as close as possible to the motor and always in
accordance with local regulations. Ask Grundfos for lightning
protective devices.
MS 402 motors, however, require no further lightning protection
as they are highly insulated.
A special cable termination kit with a built-in overvoltage
protective device is available for Grundfos 4" motors
(product No 799911 or 799912).
6.4 Cable sizing
Make sure that the submersible drop cable can withstand
permanent submersion in the actual liquid and at the actual
temperature.
The cross-section (q) of the cable must meet the following
requirements:
The submersible drop cable must be sized to the rated maximum
current (I
n
) of the motor.
The cross-section must be sufficient to make a voltage drop over
the cable acceptable.
Grundfos supplies submersible drop cables for a wide range of
installations. For correct cable sizing, Grundfos offers a cable
sizing tool on the USB stick supplied with the motor.
Fig. 11 Cable sizing tool
The sizing tool provides an accurate calculation of the voltage
drop at a given cross-section on the basis of the following
parameters:
• cable length
• operating voltage
• full-load current
• power factor
• ambient temperature.
You can calculate the voltage drop both for direct-on-line and
star-delta starting.
In order to minimise operating losses, the cable cross-section
may be increased. This is only cost-efficient if the borehole
provides the necessary space, and if the operating time of the
pump is long. The cable sizing tool also provides a power loss
calculator that shows the potential savings of an increased
cross-section.
As an alternative to the cable sizing tool, select the cross-section
on the basis of the current values of the given cables.
The cross-section of the submersible drop cable must be large
enough to meet the voltage quality requirements specified in
section 6. Electrical connection.
Determine the voltage drop for the cross-section of the
submersible drop cable by means of the diagrams on pages 17 to
20.
Use the following formula:
I = Rated maximum current of the motor.
For star-delta starting, I = rated maximum current of the motor x
0.58.
Lx = Length of cable converted to a voltage drop of 1 % of the
nominal voltage.
q = Cross-section of submersible drop cable.
Draw a straight line between the actual I-value and the Lx-value.
Where the line intersects the q-axis, select the cross-section that
lies right above the intersection.
The diagrams are made on the basis of the formulas:
Single-phase submersible motor
Three-phase submersible motor
TM00 1357 3605
Caution
Submersible motor cables are dimensioned for
submersion in liquid, and will not necessarily have
sufficient cross-section to be in free air.
TM05 8770 2613
825045 825017
L1
L2
PE
L3
L
PE
N
Three-phase
Single-phase
Lx =
length of drop cable
permissible voltage drop in %
L =
U × ΔU
I × 2 × 100 ×
L =
U × ΔU
I × 1.73 × 100 ×
L = Length of submersible drop cable [m]
U = Rated voltage [V]
ΔU = Voltage drop [%]
I = Rated maximum current of the motor [A]
cos φ =0.9
ρ = Specific resistance: 0.02 [Ωmm
2
/m]
q = Cross-section of submersible drop cable [mm
2
]
sin φ = 0.436
Xl = Inductive resistance: 0.078 x 10
-3
[Ω/m].
cos
q
-- -
sin XI+
cos
q
-- -
sin XI+
Loading...