Grundfos SQ/SQE Data Book
A New Standard in Submersible Pumps
SQ/SQE Features and Benefits
The SQ/SQE submersible pumps are designed for both continuous and intermittent operation, suitable for a variety of applications including domestic water supply, small waterworks, irrigation, and tank applications.
Key features of SQ/SQE pumps include:
- Dry-Run protection
- High efficiency pump and motor
- Excellent wear resistance and sand handling capabilities
- Protection against up-thrust
- Soft-start
- Over-voltage and under-voltage protection
- Overload protection
- Over-temperature protection
- High starting torque
Additionally, SQE pumps offer:
- Constant pressure control
- Variable speed
- Electronic control and communication
The SQ and SQE pump models feature a new motor design utilizing permanent-magnet technology, delivering unmatched performance. Combined with Grundfos's micro frequency converter, these pumps offer advanced control capabilities like Constant Pressure Control and Soft-Start, along with integrated Dry-Run protection.
The SQ models operate at a constant speed, similar to conventional pumps, but benefit from an electronically controlled permanent-magnet motor. They are available for single-phase power and feature a simple 2-wire design for easy installation.
The SQE models utilize the Grundfos "Smart Motor", which allows for communication via the CU300 status box through the power leads. This enables features like Constant Pressure Control and the ability to adjust pump performance while the pump is installed. The "Smart Motor" can operate without the CU300, but some advanced functions will be unavailable.
The CU300 provides full control of SQE pumps. It indicates alarms with a front panel light and, when used with the R100 remote control, allows for system monitoring and troubleshooting, recalling the last five causes of failure.
Pump and Motor Range
| Product | Description | Material |
|---|---|---|
| SQ/SQE Pump | 5, 10, 15, 22, 30 gpm | Stainless steel |
| SQ-MS 3 Motor | Single-phase, 1/3 - 1.5 Hp | Stainless steel, AISI 304 |
| SQE-MSE 3 Motor | Single-phase, 1/3 - 1.5 Hp | Stainless steel, AISI 304 |
| "Smart Motor" | Single-phase, 1/3 - 1.5 Hp | Stainless steel, AISI 304 |
Pipe Connection
| Pump Type | Threaded Connection |
|---|---|
| SQ/SQE 5 | 1" NPT |
| SQ/SQE 10, 15 | 1 1/4" NPT |
| SQ/SQE 22, 30 | 1 1/2" NPT |
Type key example: 10 SQ E 05 A 160 -NE (Nominal flow GPM, Type range, Motor designation, Head in ft at nominal flow rate, Material specification)
Operating Conditions
| Flow velocity past motor | Max. liquid temperature |
|---|---|
| 0.0 ft/s (Free convection) | 86°F (30°C) |
| Min. 0.5 ft/s | 104°F (40°C) |
Dry-Run Protection: The SQ and SQE pumps have integrated dry-run protection. If the water level falls below the pump inlet, the pump shuts off. After a period, it will automatically restart. For SQ pumps, the cut-off level is factory-set. For SQE pumps, the level is set using a CU300 and R100.
High Motor Efficiency: The permanent-magnet rotor design provides high efficiency across a wide load range. This allows for fewer motor sizes to cover a broad horsepower range.
High Pump Efficiency: Pumps are constructed from a 30% glass-filled engineered composite, designed for peak efficiency, reducing overall power consumption.
Excellent Wear Resistance: "Floating" impellers with tungsten carbide/ceramic bearings ensure high wear resistance, even in sandy conditions.
Protection against up-thrust: A top bearing is incorporated to protect the pump and motor from up-thrust during start-up.
Soft-Start: Integrated electronics provide a soft start, reducing starting current and ensuring smooth acceleration.
High Starting Torque: The permanent-magnet motor provides excellent starting capabilities, with locked rotor torque 1.5 times greater than conventional motors, maintaining high torque even at low voltages.
Overvoltage and Undervoltage Protection: Integrated protection prevents motor damage when voltage falls outside the permissible range. The 230V pump cuts out below 150V or above 280V and restarts automatically when voltage is within range.
Overload Protection: The motor automatically adjusts speed to maintain maximum amp level. If speed drops to 65%, the motor shuts off.
Overtemperature Protection: Permanent-magnet motors emit minimal heat due to high efficiency. An internal circulation system cools motor components. An electronic unit with a temperature sensor provides additional protection, shutting off the motor if it overheats and restarting when cooled.
Reliability: Designed to withstand tough applications with features like tungsten carbide/ceramic bearings and thrust bearings for up-thrust protection. Product lifetime is equal to or greater than conventional AC motors and 4" pumps.
Variable Speed: The SQE "Smart Motor" allows continuous variable speed control (65%-100%, 7000-10700 rpm). The pump can be set to any duty point within the pump's performance curve. This requires the CU300 and R100. A "SQE Speed Calculation" program is available for assistance.
Installation: SQ and SQE pumps can be installed vertically or horizontally. Note: the pump must not fall below the horizontal level relative to the motor. Features include a built-in spring-loaded check valve, light weight for easy installation, and suitability for 3" or larger wells. For horizontal installation, a flow sleeve is recommended for sufficient cooling and to prevent burial in sand or mud.
Service: Modular design allows for easy repair and service. The motor lead is also replaceable.
Applications
SQ with Pressure Switch and Diaphragm Tank
The SQ pump is ideal for domestic water supply, offering ease of sale, installation, and operation.
Replacement in Existing Installation: SQ and SQE pumps can replace existing 4" submersible pumps, providing an upgrade to a more advanced system, potentially including constant pressure control.
Diagram showing an SQ pump installation with a pressure switch and diaphragm tank, including components like the pump, cable, pressure switch, pressure gauge, isolating valve, mains switch, riser pipe, pressure tank, straining wire, and wire clamp.
SQE with Constant Pressure Control
Function and Benefits: Constant pressure control provides "city-like" water pressure. A flow switch starts the pump when a tap is opened, and a preset pressure is maintained via a pressure sensor and the CU300. The pump stops when flow ceases. If consumption is below 0.8 gpm, the CU300 starts the pump when pressure drops 7 psi below the set-point and stops it when pressure is 7 psi above the set-point. For consumption above 0.8 gpm, the CU300 maintains pressure within 3 psi of the set-point.
Constant pressure control reduces pressure variations and allows for smaller tanks (as small as 2 gallons). Pump operation adjusts automatically as filters become plugged.
Diagram illustrating an SQE pump system with constant pressure control, showing the SQE pump, drop pipe, supply, flow switch, pressure transducer, relief valve, diaphragm tank, R100 remote, and CU300.
Pumping from One Tank to Another
The SQE pump is ideal for transferring water between tanks.
Diagram showing an SQE pump system for tank-to-tank transfer, including the SQE pump, cable, cable clips, control unit (CU 300), level sensor, mains connection, riser pipe, and flow sleeve with strainer and supporting brackets.
Communication CU300
The CU300 status box is a control and communication unit specifically designed for SQE submersible pumps.
CU300 Status Box Features:
- Easy adjustment to specific well conditions
- Full control of SQE pumps
- Two-way communication with SQE pumps
- Indicator lights for alarms
- Ability to start and stop the pump with a button press
Communication with the pump occurs via the power leads, eliminating the need for extra cables.
Alarms indicated by the CU300: No contact, Overvoltage, Undervoltage, Dry-Run, Speed reduction, Overtemperature, Overload, Sensor alarm.
CU300 incorporates:
- External signal input for three sensors
- Relay output for external alarm indication
- Control based on received signals (e.g., flow, pressure, water level, conductivity)
The CU300 can communicate with the R100 infrared remote control.
R100 Remote Control: Allows monitoring of operating parameters such as power consumption, energy consumption, and number of operating hours. It also allows for changing factory settings, including speed, constant pressure control mode, de-watering function, and automatic restart time.
Diagrams of the CU300 status box and the R100 remote control.
R100 Menu Structure
The R100 provides a menu structure for controlling and monitoring the SQE pumps:
- 0. General: Switch off R100, Return to start, Delete all changes, Store settings, Call up settings, Print.
- 1. Operation: Set-point setting (adjustable from 7,000-10,700 rpm), Operating mode (Normal, External setpoint), Alarm indication.
- 2. Status: Displays actual operating mode, actual and external set point, motor temperature, motor speed, power input, accumulated power consumption, operating hours, number of starts, sensor values, digital input values, accumulated flow, and energy per gallon.
- 3. Limits: Settings for sensor 1 and sensor 2 (min/max stop, warning, and alarm limits), digital input function, water quantity stop limit, and temperature warning limits.
- 4. Installation: Selection of controller, setting of external set-point, automatic restart time, individual start delays, de-watering function times, minimum pump power input, dry-run protection activation, maximum motor speed, and CU300 on/off button control.
Status report: Settings and measured values can be transferred to a portable printer via wireless infrared communication.
Diagrams illustrating examples of R100 displays for Operation, Status, and Limits.
SQ/SQE Data
This section provides performance data and selection charts for various SQ/SQE models.
Easy Selection Chart
Tables detailing performance data (GPM) for different pump models (5SQ/SQE, 10SQ/SQE, 15SQ/SQE, 22SQ/SQE, 30SQ/SQE) across various pressure (PSI) and depth (feet) conditions.
Performance Curves
Graphical representations of pump performance, showing Head (feet) versus Capacity (GPM) for different models:
- Models 5 SQ/SQE
- Models 10 SQ/SQE
- Models 15 SQ/SQE
- Models 22 SQ/SQE
- Models 30 SQ/SQE
Technical Data & Accessories
Dimensions and Weights
Tables providing dimensions (A, B, C, D, E) in inches and approximate ship weight for various SQ/SQE models.
Diagram illustrating the dimensions of the pump assembly.
Materials of Construction
Detailed lists of materials used for pump and motor components, including stainless steel, polyamide, NBR rubber, and ceramic bearings.
Diagrams showing exploded views of the SQ pump and motor components.
Technical Data Summary
| Parameter | Specification |
|---|---|
| Supply Voltage | 1x200-240V ±10%, 50/60 Hz PE; 1x100-115V ±10%, 50/60 Hz PE |
| Generator Output Requirement | Minimum P1[KW] +10% of motor rating |
| Starting Current | Highest value on motor nameplate |
| Starting | Soft-start |
| Run-up Time | Maximum: 2 seconds |
| Motor Protection | Dry running, overvoltage, undervoltage, overload, overtemperature |
| Power Factor | PF = 1 |
| Service Factor | 0.33-0.50Hp: 1.75 (115V/230V); 0.50-0.75Hp: 1.4 (230V); 1.0-1.5Hp: 1.15 (230V) |
| Motor Cable | 3 Wire, 14 AWG XLPE |
| Motor Liquid | Type SML 2 |
| pH Values | SQ and SQE: 5 to 9 |
| Liquid Temperature | Maximum 104°F (40°C) |
| Discharge Port | 5SQ/SQE: 1" NPT; 10-15SQ/SQE: 1 1/4" NPT; 22-30SQ/SQE: 1 1/2" NPT |
| Minimum Ambient Temperature (Storage) | -4°F (-20°C) |
| Maximum Ambient Temperature (Storage) | +140°F (+60°C) |
| Frost Protection (Storage) | Store in frost-free location; if stored after use, motor liquid must be frost-proof. Motor stored dry. |
| Minimum Ambient Fluid Temperature (Operating) | 34°F (1°C) |
| Maximum Ambient Fluid Temperature (Operating) | +104°F (+40°C) |
| Motor Dimensions (MS 3 & MSE 3) | 0.33-0.50Hp: 20.9" x 2.68" dia.; 1.0-1.5Hp: 22.3" x 2.68" dia. |
| Motor Weights (MS 3 & MSE 3) | 0.33-0.50Hp: 6.0 lbs; 0.50-0.75Hp: 7.1 lbs; 1.0-1.5Hp: 8.2 lbs |
| Pump End Dimensions | Pump Diameter: 2.68"; Incl. cable guard: 2.91" |
| Pump End Dimensions (min./max.) | 5SQ/SQE: 10.6"-18.0"; 10-30SQ/SQE: 10.6"-16.9" |
| Pump End Weights (min./max.) | 2.2 lbs to 3.5 lbs |
| Well Diameter (minimum) | 3" |
| Installation Depth (Maximum) | 500 feet, below static water level |
SQ/SQE Accessories
The following accessories are available:
- CU300 Status Box: Control and communication unit (Product no. 96422776).
- Constant Pressure Kit: Includes CU300, pressure transducer, and flow switch (Product nos. 96022968 for 5-15 SQE, 96022971 for 22-30 SQE).
- Flow Switch: Available for 5-15 SQE (0.5 GPM, Product no. 96022967) and 22-30 SQE (1 GPM, Product no. 96022970).
- Pressure Transducer: 0-90 psi (0-6 bar) (Product no. 96026030).
- 3" Well Seal: Sanitary well seal (Product no. 1B5102).
- R100 remote control: For wireless infrared communication with CU300 (Product no. 6253333).
- Printer: For R100, infrared communication (Product nos. 620480, 620481).
- Potentiometer: External potentiometer with cabinet for wall mounting (Product no. 655468).
- SQE - Speed calculation software: Program for Windows95, including PC Tool and operating manual (Product no. 96426840).
- SQ/SQE - Flow sleeve: Flow sleeve complete (Product no. 96037505).
Notes
Specifications are subject to change without notice. Performance conforms to ISO 2548 Annex B.
