Table of Contents
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CONTENTS
1.
1.1
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
3.
3.1
4.
4.1
4.2
4.3
5.
6.
7.
8.
9.
10.
10.1
11.
12.
12.1
12.2
12.3
12.5
12.7
12.8
13.
14.
14.1
15.
16.
17.
18.
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.
4
1. General description
Page
The SQ/SQE is a 3 inch diameter submersible pump
mainly designed for the pumping of raw water in do-
4
mestic water supply. This manual is designed to assist
4
in the proper set-up, installation and operation of
4
these pumps.
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4
1.1 Applications
4
Typical applications are:
5
5
• residential housing
5
• small waterworks
5
• pressure boosting
6
• irrigation systems
6
• liquid transfer in tanks.
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2. Preinstallation
6
7
2.1 Well preparation
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If the pump is to be installed in a new well, the well
7
should be fully developed and bailed or blown free of
cuttings and sand.
8
The construction of the Grundfos SQ/SQE submersi-
8
bles makes them resistant to abrasion; however, no
9
pump made of any material can forever withstand the
9
destructive wear that occurs when constantly pump-
9
ing sandy water.
10
If this pump is used to replace an oil-filled submers-
10
ible or oil-lubricated line-shaft turbine in an existing
10
well, the well must be blown or bailed clear of oil.
10
10
2.2 Make sure you have the right pump
10
Determine the maximum depth of the well and the
10
drawdown level at the maximum pump capacity.
10
Pump selection and setting depth should be made
10
based on this data.
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12
2.3 Pumped liquid requirements
13
Submersible well pumps are designed for pumping
13
clear, cold water; free of air or gases. Decreased pump
13
performance and life expectancy can occur if the wa-
ter is not clear, cold or contains air or gases.
13
The water temperature should not exceed 104°F.
14
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.
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