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

CONTENTS
1. General
1.1 Applications
2. Technical data
2.1 Storage
2.2 Sound pressure level
3. Preparation
3.1 Refilling of motor liquid
3.2 Positional requirements
3.3 Liquid temperatures/cooling
4. Electrical connection
4.1 General
4.2 Motor protection
4.3 Connection of motor
5. Installation
5.1 General
5.2 Assembly of pump part and motor
5.3 Removal of non-return valve
5.4 Fitting the cable plug to the motor
5.5 Fitting the cable guard
5.6 Cable sizing
5.7 Fitting the submersible drop cable
5.8 Pipework connection
6. Start-up
7. Operation
7.1 Minimum flow rate
7.2 Selection of diaphragm tank and
setting of precharge pressure and pressure
switch
7.3 Built-in protection
8. Maintenance and service
8.1 Contaminated pumps
9. Fault finding chart
9.1 Megging
10. Checking of motor and cable
11. Environment
12. Disposal
Before beginning installation procedures,
these installation and operating instruc-
tions should be studied carefully. The in-
stallation and operation should also be in
accordance with local regulations and ac-
cepted codes of good practice.

1. General

On page 123 of these installation and operating
instructions, you will find copies of the pump and
motor nameplates.
Before the SQ/SQE pump is lowered into the bore-
hole, this page should be filled in with the relevant
nameplate data.
These installation and operating instructions must be
kept in a dry place near the installation site for refer-
ence purposes.
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1.1 Applications

The SQ and SQE pumps are designed for pumping
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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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- private housing,
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- small waterworks,
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- irrigation systems in for instance green houses.
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• Liquid transfer in tanks.
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• Pressure boosting.
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The SQE-NE pumps are designed for pumping thin,
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6 clean, non-explosive liquids, not containing solid par-
ticles or fibres.
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These pumps are suitable for pumping contaminated
or hydrogen-carbonate containing groundwater, e.g.
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from
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• dumps,
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• chemical depots,
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• industrial areas,
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• oil and petrol filling stations,
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• environmental applications.
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The SQE-NE pumps can also be used for sampling
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and monitoring and to some extent for incorporation
in water treatment systems.
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Information applying to all pump types:
The maximum sand content of the water must not
exceed 50 g/m³. A larger sand content will reduce
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the life of the pump and increase the risk of blocking.
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Note: If liquids with a viscosity higher than that of
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water are to be pumped, please contact GRUND-
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FOS.
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pH values:
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SQ and SQE: 5 to 9.
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SQE-NE: Please contact GRUNDFOS.
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Liquid temperature:
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The temperature of the pumped liquid must not
exceed 40°C.