Tabla De Contenido; General Description; Applications; Preinstallation - Grundfos SQ Serie Instrucciones De Instalación Y Funcionamiento

CONTENTS
1. General description
1.1 Applications
2. Preinstallation
2.1 Well preparation
2.2 Make sure you have the right pump
2.3 Pumped liquid requirements
2.4 Liquid temperatures/cooling
2.5 Motor preparation
2.6 Refilling of motor liquid
3. Installation positions
3.1 Positional requirements
4. Electrical connection
4.1 General
4.2 Motor protection
4.3 Connection of motor
5. Cable sizing
6. Splicing the cable
7. Fitting the cable guard
8. Piping
9. Installing the pump
9.1 Installation depth
10. Generator operation
11. Starting the pump for the first time
11.1 Motor cooling and other considerations
11.2 Impurities in the water
11.3 Minimum flow rate
11.4 Built-in functions
11.5 Resetting the pump
11.6 MS 3 motors
11.7 MSE 3 motors
11.8 Maintenance and service
12. Assembly of pump and motor
13. Troubleshooting
13.1 Instruments not allowed
14. Checking of motor and cable
15. Environment
16. Technical data
17. Disposal
WARNING:
Prior to installation, read these installation
and operating instructions. Installation and
operation must comply with local regula-
tions and accepted codes of good prac-
tice.

1. General description

The SQ/SQE is a 3 inch diameter deep well sub-
mersible 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.
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1.1 Applications

Typical applications:
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• residential housing
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• small waterworks
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• pressure boosting
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• liquid transfer in tanks
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• irrigation systems.
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WARNING: This pump has not been investigated for
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use in swimming pool or marine areas.
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2. Preinstallation

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2.1 Well preparation

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If the pump is to be installed in a new well, the well
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should be fully developed and bailed or blown free of
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cuttings and sand.
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The construction of the Grundfos SQ/SQE submersi-
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pump made of any material can forever withstand the
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destructive wear that occurs when constantly pump-
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ing sandy water.
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If this pump is used to replace an oil-filled submers-
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ible or oil-lubricated line-shaft turbine in an existing
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well, the well must be blown or bailed clear of oil.
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2.2 Make sure you have the right pump

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Determine the maximum depth of the well and the
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drawdown level at the maximum pump capacity.
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Pump selection and setting depth should be made
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based on this data.
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2.3 Pumped liquid requirements

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Submersible well pumps are designed for pumping
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clear, cold water; free of air or gases. Decreased
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pump performance and life expectancy can occur if
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the water is not clear, cold or contains air or gases.
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A check should be made to ensure that the installa-
11 tion depth of the pump will always be at least three
feet below the maximum drawdown level of the well.
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The bottom of the motor should never be installed
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lower than the top of the well screen or within five
feet of the well bottom.
CAUTION: This pump has been approved for pump-
ing maximum 86°F water only.

2.4 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.