Grundfos 5SQE-140, 5SQE-90, 5SQ-180, 5SQ-140, 5SQE-180 Installation And Operating Instructions Manual
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SQ, SQE
Installation and operating instructions
GRUNDFOS 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.
3
SQ, SQE
Installation and
operating instructions
Page 4
4
CONTENTS
Page
1. General description 4
1.1 Applications 4
2. Preinstallation 4
2.1 Well preparation 4
2.2 Make sure you have the right pump 4
2.3 Pumped liquid requirements 4
2.4 Motor cooling requirements 5
2.5 Liquid temperatures/cooling 5
2.6 Motor preparation 5
2.7 Refilling of motor liquid 5
3. Installation positions 6
3.1 Positional requirements 6
4. Electrical connection 6
4.1 General 6
4.2 Motor protection 6
4.3 Connection of motor 6
5. Cable sizing 7
6. Splicing the cable 7
7. Fitting the cable plug to the motor 7
8. Fitting the cable guard 8
9. Piping 8
10. Installing the pump 9
10.1 Installation depth 9
11. Generator operation 9
12. Starting the pump for the first time 10
12.1 Motor cooling and other considerations 10
12.2 Impurities in the water 10
12.3 Minimum flow rate 10
12.4 Built-in protection 10
12.5 Resetting the pump 10
12.6 MS 3 motors 10
12.7 MSE 3 motors 10
12.8 Maintenance and service 10
13. Assembly of pump and motor 11
14. Troubleshooting 12
14.1 Instruments not allowed 13
15. Checking of motor and cable 13
16. Environment 13
17. Disposal 13
18. Technical data 14
1. General description
The SQ/SQE is a 3 inch diameter submersible pump
mainly designed for the pumping of raw water in domestic water supply. This manual is designed to assist
in the proper set-up, installation and operation of
these pumps.
1.1 Applications
Typical applications are:
• residential housing
• small waterworks
• pressure boosting
• irrigation systems
• liquid transfer in tanks.
2. Preinstallation
2.1 Well preparation
If the pump is to be installed in a new well, the well
should be fully developed and bailed or blown free of
cuttings and sand.
The construction of the Grundfos SQ/SQE submersibles makes them resistant to abrasion; however, no
pump made of any material can forever withstand the
destructive wear that occurs when constantly pumping sandy water.
If this pump is used to replace an oil-filled submersible or oil-lubricated line-shaft turbine in an existing
well, the well must be blown or bailed clear of oil.
2.2 Make sure you have the right pump
Determine the maximum depth of the well and the
drawdown level at the maximum pump capacity.
Pump selection and setting depth should be made
based on this data.
2.3 Pumped liquid requirements
Submersible well pumps are designed for pumping
clear, cold water; free of air or gases. Decreased pump
performance and life expectancy can occur if the water is not clear, cold or contains air or gases.
The water temperature should not exceed 104°F.
A check should be made to ensure that the installa-
tion depth of the pump will always be at least three
feet below the maximum drawdown level of the well.
The bottom of the motor should never be installed
lower than the top of the well screen or within five
feet of the well bottom.
Before beginning installation procedures,
these installation and operating instructions should be studied carefully. The installation and operation should also be in
accordance with local regulations and accepted codes of good practice.
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2.4 Motor cooling requirements
To ensure proper motor cooling, refer to the table below for minimum flow requirements:
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 installed in a flow sleeve.
2.5 Liquid temperatures/cooling
Figure 1 shows an SQ/SQE pump installed in a well.
With the pump operating, figure 1 illustrates the fol-
lowing:
• Well diameter
• Pump diameter
• Temperature of pumped liquid
• Flow past the motor to the pump suction strainer.
Note: The well diameter must be at least 3 inches.
If there is a risk that the motor will be covered with
sediment, it is recommended the pump be placed in a
flow sleeve. The motor should always be installed
above the well screen.
Fig. 1 Pump installed in well
2.6 Motor preparation
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 will protect the motor liquid down to 4°F (–20°C) and prevent
the growth of bacteria. The level of motor liquid is important for the operating life of the bearings and consequently the life of the motor.
2.7 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
end from the motor.
2. Place the motor in vertical position with an inclination of approximately 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 similar tool, see fig. 2.
5. To allow possible air to escape, move the motor
from side to side and turn the shaft.
6. Replace the filling plug and make sure it is tight.
7. Assemble pump end and motor.
8. Fit the cable guard.
The pump is now ready for installation.
Fig. 2 Injecting motor liquid
Flow velocity
past the motor
Maximum
liquid temperature
0.0 f/s
(free convection)
86°F (30°C)
Min. 0.5 f/s 104°F (40°C)
TM01 0518 1297
Well
diameter
Pump
diameter
Liquid
temperature
TM02 9606 3504
10
6
3. Installation positions
3.1 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. 3.
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 installed in a flow sleeve.
Fig. 3 Pump position
4. Electrical connection
4.1 General
The electrical connection should be carried out by an
authorized electrician in accordance with local regulations.
The supply voltage, rated maximum current and
power factor (PF) appear on the motor nameplate.
The required voltage for Grundfos submersible
MS 3/MSE 3 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).
If the pump is connected to an installation where a
Ground Fault circuit breaker (GFI) is used as additional
protection, this circuit breaker must trip out when
ground fault currents with DC content (pulsating DC)
occur.
Note: The pump must never be connected to a capacitor or to another type of control box than CU 300 or
CU 301.
Note: The pump must never be connected to an external frequency converter.
Supply voltage:
1 x 90-120 V or 1 x 200-240 V –10%/+6%, 50/60 Hz.
The current consumption can only be measured accu-
rately by means of a true RMS instrument. If other instruments are used, the value measured will differ
from the actual value.
The SQE pumps can be connected to a CU 300 or
CU 301 control box.
4.2 Motor protection
The motor has built-in automatic thermal overload
protection and requires no additional motor protection.
4.3 Connection of motor
The motor can be connected directly to the main circuit breaker.
Start/stop of the pump will typically be done via a
pressure switch, see fig. 4.
Note: The pressure switch must be rated for the maximum amps of the specific pump.
Fig. 4 Wiring diagram
Note: The pump must never be connected to a capaci-
tor or to another type of control box than CU 300 or
CU 301.
TM01 1375 4397
Before starting work on the pump, make
sure that the electricity supply has been
switched off and that it cannot be accidentally switched on.
The pump must be grounded.
The pump must be connected to an exter-
nal mains switch.
Allowed
Not allowed
Reduced risk of electric shock during operation of this pump requires the provision of
acceptable grounding. If the means of connection to the supply connected box is
other than grounded metal conduit, ground
the pump back to the service by connecting
a copper conductor, at least the size of the
circuit supplying the pump.
TM02 8736 0804
Single-phase 2-wire wiring diagram
for Grundfos motors
Quick disconnection
Pressure
switch
Pump and motor
Blac
k
Black
Green
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