Grundfos SQ Series

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96160909 05.2022

ECM: 1334401

www.grundfos.com

Trademarks displayed in this material, including but not limited to Grundfos and the Grundfos logo, are registered trademarks owned by The Grundfos Group. © 2022 Grundfos Holding A/S, all rights reserved.

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Table of Contents5
General Information6
Symbols Used in this Document6
General7
Applications7
Technical Data8
Storage8
Sound Pressure Level8
Preparation9
Refilling of Motor Liquid9
Positional Requirements9
Liquid Temperatures/Cooling10
Electrical Connection11
General11
Motor Protection12
Connection of Motor12
Installation12
General12
Assembly of Pump Part and Motor13
Removal of Non-Return Valve13
Fitting the Cable Plug to the Motor14
Fitting the Cable Guard14
Cable Sizing15
Fitting the Submersible Drop Cable15
Pipework Connection16
Start-Up17
Operation17
Minimum Flow Rate17
Selection of Diaphragm Tank and Setting of Precharge Pressure and Pressure Switch17
Well System Pressure Overload18
Built-In Protection19
Maintenance and Service19
Contaminated Pumps19
Fault Finding Chart20
The Pump Does Not Run20
The Pump Runs but Gives no Water20
The Pump Runs at Reduced Capacity20
Frequent Starts and Stops21
Megging21
Checking the Power Supply22
Environment23

Grundfos SQ Series - Page 27

Table of Contents

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