English (GB) Installation and operating instructions
Caution
Note
English (GB)
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. General
2.1 Applications
3. Technical data
3.1 Storage
3.2 Sound pressure level
4. Preparation
4.1 Refilling of motor liquid
4.2 Positional requirements
4.3 Liquid temperatures/cooling
5. Electrical connection
5.1 General
5.2 Motor protection
5.3 Connection of motor
6. Installation
6.1 General
6.2 Assembly of pump part and motor
6.3 Removal of non-return valve
6.4 Fitting the cable plug to the motor
6.5 Fitting the cable guard
6.6 Cable sizing
6.7 Fitting the submersible drop cable
6.8 Pipework connection
7. Start-up
8. Operation
8.1 Minimum flow rate
8.2 Selection of diaphragm tank and setting
of precharge pressure and pressure
switch
8.3 Built-in protection
9. Maintenance and service
9.1 Contaminated pumps
10. Fault finding chart
10.1 Megging
11. Checking the power supply
12. Environment
13. Disposal
Warning
Prior to installation, read these
installation and operating instructions.
Installation and operation must comply
with local regulations and accepted
codes of good practice.
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1. Symbols used in this document
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2. General
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On page 341 of these installation and operating
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instructions, you will find copies of the pump and
motor nameplates.
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Before the SQ/SQE pump is lowered into the
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borehole, this page should be filled in with the
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relevant nameplate data.
These installation and operating instructions must be
kept in a dry place near the installation site for
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reference purposes.
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2.1 Applications
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The SQ and SQE pumps are designed for pumping
thin, clean, non-aggressive, non-explosive liquids,
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not containing solid particles or fibres.
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Typical applications:
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• Groundwater supply for
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• Liquid transfer in tanks.
• Pressure boosting.
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!
If these safety instructions are not
observed, it may result in malfunction
or damage to the equipment!
Notes or instructions that make the job
easier and ensure safe operation.
– private housing
– small waterworks
– irrigation systems in for instance green houses.
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The SQE-NE pumps are designed for pumping thin,
Note
clean, non-explosive liquids, not containing solid
particles or fibres.
These pumps are suitable for pumping contaminated
or hydrogen-carbonate containing groundwater, e.g.
from
• dumps
• chemical depots
• industrial areas
• oil and petrol filling stations
• environmental applications.
The SQE-NE pumps can also be used for sampling
and monitoring and to some extent for incorporation
in water treatment systems.
Information applying to all pump types
The maximum sand content of the water must not
exceed 50 g/m
the life of the pump and increase the risk of blocking.
pH values
SQ and SQE: 5 to 9.
SQE-NE: Please contact Grundfos.
Liquid temperature
The temperature of the pumped liquid must not
exceed 35 °C.
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. A larger sand content will reduce
If liquids with a viscosity higher than
that of water are to be pumped, please
contact Grundfos.
3. Technical data
Supply voltage
1 x 200-240 V - 10 %/+ 6 %, 50/60 Hz, PE.
Operation via generator: As a minimum, the
generator output must be equal to the motor P
+ 10 %.
Starting current
The motor starting current is equal to the highest
value stated on the motor nameplate.
Power factor
PF = 1.
Motor liquid
Type SML 2.
Motor cable
1.5 m, 3 x 1.5 mm
Liquid temperature
Maximum 35 °C.
Pump outlet size
SQ 1, SQ 2, SQ 3: Rp 1 1/4.
SQ 5, SQ 7: Rp 1 1/2.
Pump diameter
74 mm.
Borehole diameter
Minimum 76 mm.
Installation depth
Maximum 150 m below static water level.
See also section 6.8.2 Installation depths.
Net weight
Maximum 6.5 kg.
2
, PE.
3.1 Storage
Storage temperature: -20 °C to +60 °C.
3.1.1 Frost protection
If the pump has to be stored after use, it must be
stored on a frost-free location or it must be ensured
that the motor liquid is frost-proof.
The motor must not be stored without being filled
with motor liquid.
3.2 Sound pressure level
The sound pressure level of the pump is lower than
the limiting values stated in the EC Council Directive
2006/42/EC relating to machinery.
[kW]
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4. Preparation
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Allowed
Not allowed
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Grundfos MS 3 and MSE 3 submersible motors have
water-lubricated slide bearings. No additional
lubrication is required.
The submersible motors are factory-filled with a
special Grundfos motor liquid (type SML 2), which is
frost-proof down to - 20 °C and preserved to prevent
the growth of bacteria.
The level of motor liquid is decisive for the operating
life of the bearings and consequently the life of the
motor.
4.1 Refilling of motor liquid
If for any reason the motor liquid has been drained or
lost, the motor must be refilled with Grundfos motor
liquid SML 2.
To refill the motor, proceed as follows:
1. Remove the cable guard and separate the pump
part from the motor.
Fig. 1
2. Place the motor in vertical position with an
inclination of approx. 10 °.
3. Remove the filling plug using a screwdriver or
a similar tool.
4. Inject motor liquid into the motor with a filling
syringe or the like.
5. To allow possible air to escape, move the motor
from side to side.
6. Refit the filling plug and make sure it is tight.
7. Assemble pump part and motor.
8. Refit the cable guard.
The pump is now ready for installation.
4.2 Positional requirements
The pump is suitable for vertical as well as horizontal
installation, however, the pump shaft must never fall
below the horizontal plane. See fig. 2.
Fig. 2
If the pump is to be installed horizontally, e.g. in a
tank, and there is a risk that the pump might be
covered by mud, it must be fitted in a flow sleeve.
For installation depths, see section 6.8.2.
4.3 Liquid temperatures/cooling
Figure 3 shows an SQ/SQE pump installed in a
borehole. The pump is operating.
Figure 3 illustrates the following:
• borehole diameter
• pump diameter
• temperature of pumped liquid
• flow past the motor to the pump suction strainer.
TM02 9606 3504
TM01 1375 4397
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Fig. 3
Caution
Caution
Liquid
temperature
Borehole
diameter
Pump
diameter
Caution
To ensure sufficient cooling of the motor, it is
important to observe the maximum liquid
temperature of 35 °C under all conditions.
The borehole diameter must be at least
76 mm (approx. 3").
The motor should always be installed above the well
screen. If a flow sleeve is used, the pump may be
installed freely in the borehole.
Do not let the pump run against a
closed discharge pipe for more than
5 minutes. When the discharge pipe is
closed, there is no cooling flow and
there is a risk of overtemperature in
motor and pump.
If the actual temperature of the pumped liquid
exceeds the specified value or the operating
conditions otherwise fall outside the specified
conditions, the pump may stop. Please contact
Grundfos.
5. Electrical connection
5.1 General
The electrical connection should be carried out by an
authorised electrician in accordance with local
regulations.
Warning
Before starting work on the pump,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
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.
If the motor cable is damaged, it must
be replaced by Grundfos, an authorised
Grundfos service workshop or similarly
qualified persons to avoid a hazard.
The supply voltage, rated maximum current and
power factor (PF) appear from the motor nameplate.
The required voltage for Grundfos submersible
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).
TM01 0518 1297
If the pump is connected to an electric installation
where an earth-leakage circuit breaker (ELCB) is
used as an additional protection, this circuit breaker
must trip out when earth fault currents with DC
content (pulsating DC) occur.
The earth leakage circuit breaker must be marked
with the following symbol: .
Supply voltage
1 x 200-240 V - 10 %/+ 6 %, 50/60 Hz, PE.
The current consumption can only be measured by
means of a true RMS instrument. If other instruments
are used, the value measured will differ from the
actual value.
On SQ/SQE pumps, a leakage current of 2.5 mA at
230 V, 50 Hz, can typically be measured. The
leakage current is proportional to the supply voltage.
The SQE and SQE-NE pumps can be connected to a
control box, type CU 300 or CU 301.
The pump must never be connected to
a capacitor or to another type of control
box than CU 300 or CU 301.
The pump must never be connected to
an external frequency converter.
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