551692 1 Grundfos SQ Series Brochure

: Pump 551692 1 Grundfos Sq Series Brochure 551692_1_Grundfos SQ Series Brochure pdf

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GRUNDFOS DATA BOOKLET

SQ, SQE, SQE-NE,

CU331SP

Table of contents

2

SQ, SQE, SQE-NE,

CU331SP

1. Product introduction 3

Features and benefits 3

Identification 5

2. Applications 6

SQ with pressure switch and pressure tank 6

Constant-pressure control with

CU 301 - residential water supply 7

Constant-pressure control with

CU 301 - irrigation 8

Maintaining a constant water table 9

Emptying or filling a tank 10

Pumping from one tank to another 11

Setting of operating parameters 12

SQE with manual speed control 13

3. Performance range 14

4. Installation 15

5. Sizing and selection 16

System sizing guide 16

6. Cable sizing 17

Cable sizing chart 17

7. SQ curve charts 18

5 SQ, SQE 18

10 SQ, SQE 19

15 SQ, SQE 20

22 SQ, SQE 21

30 SQ, SQE 22

10 SQE-NE 23

22 SQE-NE 24

8. Technical data 25

Electrical data 25

Operating conditions 25

Motor data 26

Dimensions and weights 27

9. Construction 28

Materials of construction 28

Material specification 29

10. Control units 30

CU 301 30

CU 300 33

11. CU331SP variable frequency drive 37

Features 37

Applications 37

System components 37

Identification 38

CU331SP product range 39

CU331SP performance range 39

CU331SP sizing 39

CU331SP operation 40

CU331SP installation 44

CU331SP electrical connection 45

CU331SP technical data 51

CU331SP curve charts 53

12. Accessories 59

CU331SP Constant Pressure

Drive Kits (with sensor) 59

CU 301 Constant Pressure System 59

CU 300 Status Box & R100 59

SQ, SQE flow sleeves 59

13. Further product documentation 60

WebCAPS 60

WinCAPS 61

Product introduction

SQ, SQE, SQE-NE,

CU331SP 1

3

1. Product introduction

3-inch SQ, SQE submersible well pumps for 3-inch

and larger wells

SQ, SQE pumps are suitable for both continuous and

intermittent operation for a variety of applications:

• Domestic water supply

• light commercial

• irrigation

• tank applications.

Features and benefits

SQ, SQE pumps offer these features:

• Dry-run protection

• high efficiency pump and motor

• protection against up-thrust

•soft-start

• over-voltage and under-voltage protection

• over-temperature protection

• high starting torque.

Additionally, SQE pumps offer these advantages:

• Constant pressure control

• variable speed

• electronic control and communication.

SQ, SQE innovative motor technology

SQ, SQE pumps feature an innovative motor design

incorporating permanent-magnet technology. By

combining permanent-magnet motors and a Grundfos

micro-frequency converter, we are able to deliver

unmatched performance and the ability to control and

communicate with the pump in ways never before

possible. A few of the features that result from this

combined technology are Constant Pressure Control,

Soft-Start, and Integrated Dry-Run Protection, but

these are just a few of the features these pumps offer.

SQ pump models operate at a constant speed much

like today’s conventional pumps. The difference is that

SQ delivers the benefits of an electronically controlled

permanent-magnet motor that cannot be achieved with

a conventional induction motor.

SQ pumps are available for single-phase power; a

simple 2-wire design makes installation easy.

SQE pumps are equipped with a Grundfos "Smart

Motor." Like the SQ models, SQ pumps have a high

efficiency permanent-magnet motor — but we add the

ability to communicate.

The "Smart Motor" communicates via the CU301

status box through the power leads.

It is not necessary to run any additional wires down the

well. Communication with the pump provides Constant

Pressure Control and the highly useful ability to

change the pump performance while the pump is

installed in the well. Like the SQ motor, this is also a 2-

wire motor designed for single-phase operation.

Dry-running protection

The pumps are protected against dry running. A value

of Pcut-out ensures cut-out of the pump in case of lack

of water in the borehole thus preventing a burnout of

the motor.

Pcut-out is factory-set both for the SQ and SQE, SQE-

NE pumps.

Fig. 1 Pcut-out curve

High pump efficiency

The hydraulic pump components are polyamide

reinforced with 30 % glass fiber. The hydraulic design

provides for high pump efficiency resulting in low

energy consumption and therefore low energy costs.

High motor efficiency

The motors are based on a permanent magnet rotor

(PM motor) featuring high efficiency within a wide load

range.

Fig. 2 Efficiency curves of Grundfos SQ motor

versus conventional motors

TM01 2751 2298TM01 2698 2298

H

Q

cut-out

P

Q

P1

P

cut-out

200 250 300 350 400 450 500 550 P2 [W]

45

50

55

60

65

70

[%]

Eta

Conventional 1 ph

Conventional 3 ph

MS 3

Conventional 3-ph.

Conventional 1-ph.

SQ.

Product introduction

SQ, SQE, SQE-NE,

CU331SP

1

4

Wear resistance

The pump design features "floating" impellers (not

fastened to the shaft). Each impeller has its own

tungsten carbide/ceramic bearing. The construction

and materials ensure high wear resistance to sand for

long product life.

Fig. 3 Example of Grundfos floating impeller

Protection against upthrust

Starting up a pump with a very low counter pressure

involves the risk of the entire impeller stack being

lifted, also called upthrust. Upthrust may cause

breakdown of both pump and motor.

SQ, SQE, SQE-NE motors are fitted with a top bearing

protecting both pump and motor against upthrust, thus

preventing breakdown during the critical start-up

phase.

Excellent starting capabilities

The integrated electronic unit of the motor features soft

starting. Soft start reduces the starting current and

thus gives the pump a smooth and steady

acceleration.

The soft starter minimizes the risk of wear on the pump

and prevents overloading of the mains during start-up.

The excellent starting capabilities are a result of the

high locked-rotor torque of the permanent magnet

motor together with the few pump stages. The high

starting reliability also applies in case of low voltage

supply.

Fig. 4 Soft-start feature

Overvoltage and undervoltage protection

Overvoltage and undervoltage may occur in case of

unstable voltage supply.

The integrated protection of all motors prevents

damage to the motor in case the voltage moves

outside the permissible voltage range.

The pump will cut out if the voltage falls below 150 V or

rises above 315 V. The motor is automatically cut in

again when the voltage again falls within the

permissible voltage range. Therefore no extra

protection relay is needed.

Overload protection

Exposure of the pump to heavy load causes the

current consumption to rise. The motor will

automatically compensate for this by reducing the

speed to 3000 rpm. Further overload will lead to stop.

If the rotor is being prevented from rotating, this will

automatically be detected and the power supply will be

cut out. Consequently, no extra motor protection is

needed.

Overtemperature protection

A permanent magnet motor gives off very little heat to

its surroundings. In combination with an efficient

internal circulation system leading the heat away from

the rotor, stator and bearings, this ensures optimum

operating conditions for the motor.

As an extra protection, the electronic unit has a built-in

temperature sensor. When the temperature rises too

high, the motor is cut out; when the temperature has

dropped, the motor is automatically cut in again.

Reliability

The motors are built for high reliability and feature:

• Tungsten carbide / ceramic bearings

• thrust bearings protecting against downthrust

• product life time equal to conventional AC motors.

Variable speed

The SQE motor enables continuously variable speed

control from 3,000 to 10,700 rpm. The pump can be set

to operate in any duty point in the range between the

3,000 and 10,700 rpm performance curves of the

pump. Consequently, the pump performance can be

adapted to any specific requirement.

The variable speed control facility requires the use of

the CU 300 or CU 301 control unit.

For the calculation of pump speed, the program

"SQE Speed Calculation" is available on CD-ROM as

an accessory.

TM01 3141 3498TM01 3479 4198

Current [A]

DOL (direct-on-line starting)

Soft start

3Time [s]

Product introduction

SQ, SQE, SQE-NE,

CU331SP 1

5

Identification

Type key example SQ, SQE, SQE-NE

10 SQ E 05 - 160 N E

Rated gallons per minute

Basic version (without

communication)

Electronic communication

Horsepower

Total Dynamic Head in (ft) at rated flow

Stainless steel 316

Environmental, PVDF impellers

Applications

SQ, SQE, SQE-NE,

CU331SP

2

6

2. Applications

SQ with pressure switch and pressure tank

SQ is ideally suited for domestic water supply in

single- family dwellings or summer homes which are

not connected to municipal waterworks. SQ is easy to

install and operate.

Fig. 5 Application example: SQ with pressure switch and pressure tank

TM01 2447 1798

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQ

2 Cable

3 Cable clips

4 Pressure tank

12 Pressure switch

14 Pressure gauge

20 Mains switch

30 Safety cable

31 Wire clamp

17

14

22

2

3

4

12

18

20

21 17

31

30

31

1

1 Pump, SQ

2 Cable

3 Cable clips

4 Pressure tank

12 Pressure switch

14 Pressure gauge

17 Isolating valve

18 Tap

20 Mains switch

21 Mains connection

22 Riser pipe

30 Safety cable

31 Wire clamp

Recommended min.

20 inches (0.5 m)

Min. 20 inches

(0.5 m)

Applications

SQ, SQE, SQE-NE,

CU331SP 2

7

Constant-pressure control with

CU 301 - residential water supply

The system maintains a constant pressure within the

maximum pump performance in spite of a varying

water consumption.

The pressure is registered by the pressure sensor and

transmitted to the CU 301. The CU 301 adjusts the

pump performance accordingly.

Function

When a tap is opened the pressure in the tank will start

to drop. At a flow lower than approximately 1 gpm

(0.18 m3/h), the pressure will drop slowly.

When the pressure in the tank is 7 psi (0.5 bar) below

setpoint, the pump will start. The pump will run until the

pressure is 7 psi (0.5 bar) above setpoint. This way of

operation is called on/off operation.

At a flow higher than approximately 1 gpm (0.18 m3/h),

the pressure will drop quickly and the pump will start

immediately and maintain a constant pressure.

During operation, the CU 301 will regulate the pump

speed to maintain a constant pressure. If there is no

consumption, the pump will boost the pressure to 7 psi

(0.5 bar) above setpoint and stop after a few seconds.

Fig. 6 Application example: Constant-pressure control with CU 301 - residential water supply

TM03 3429 0406

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2 Cable

3 Cable clips

4 Pressure tank 2 gal (8 liters)

5 Control unit CU 301

10 Pressure sensor 0 - 120 psi (0 - 6 bar)

14 Pressure gauge

30 Safety cable

31 Wire clamp

Recommended min.

20 inches (0.5 m)

Min. 20 inches

(0.5 m)

1Pump, SQE

2Cable

3Cable clips

4 Pressure tank, 2 gal (8 liters)

5 Control unit, CU 301

10 Pressure sensor, 0 - 120 psi (0 - 6 bar)

14 Pressure gauge

18 Tap

21 Mains connection

22 Riser pipe

30 Safety cable

31 Wire clamp

Applications

SQ, SQE, SQE-NE,

CU331SP

2

8

Constant-pressure control with

CU 301 - irrigation

The system maintains a constant pressure within the

maximum pump performance in spite of a varying

water consumption.

The pressure is registered by means of the pressure

sensor and transmitted to the CU 301. The CU 301

adjusts the pump performance accordingly.

Function

When the sprinkler system is started, the pressure in

the tank will start to drop.

At a flow lower than approximately 1 gpm (0.18 m3/h),

the pressure will drop slowly. When the pressure in the

tank is 7 psi (0.5 bar) below setpoint, the pump will

start. The pump will run until the pressure is 7 psi (0.5

bar) above setpoint. This way of operation is called

on/off operation.

At a flow higher than approximately 1 gpm (0.18 m3/h),

the pressure will drop quickly and the pump will start

immediately and maintain a constant pressure.

During operation, the CU 301 will regulate the pump

speed to maintain a constant pressure. If there is no

consumption, the pump will boost the pressure to 7 psi

(0.5 bar) above setpoint and stop after a few seconds.

Fig. 7 Application example: Constant-pressure control with CU 301 - irrigation

TM03 3428 2810

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2 Cable

3 Cable clips

4 Pressure tank 2 gal (8 liter)

5 Control unit CU 301

10 Pressure sensor 0 - 120 psi (0 - 6 bar)

14 Pressure gauge

30 Safety cable

31 Wire clamp

Min. 20 inches

(0.5 m)

Recommended min.

20 inches (0.5 m)

1 Pump, SQE

2 Cable

3 Cable clips

4 Pressure tank 2 gal (8 liter)

5 Control unit, CU 301

10 Pressure sensor, 0 - 120 psi (0-6 bar)

14 Pressure gauge

18 Sprinkler system

21 Mains connection

22 Riser pipe

30 Safety cable

31 Wire clamp

Applications

SQ, SQE, SQE-NE,

CU331SP 2

9

Maintaining a constant water table

A constant water table can be maintained by adjusting

pump performance. It may be important to maintain a

constant water table, e.g. in connection with keeping

out the groundwater on a building site or water

remediation projects.

The example shows how to maintain a constant water

table by adjusting pump performance.

Sensors

Fig. 8 Application example: Maintaining a constant water table

Level Description Reaction

Level sensor (pos. 11)

Warning (max.)

Too high water level.

Possible cause: Insufficient

pump capacity.

Alarm relay

operates.

Desired level The water level which should

be maintained.

Warning (min.)

Too low water level.

Possible cause: Too high

pump capacity.

Alarm relay

operates.

TM01 2459 2810

22

31

2

3

30

31

11

R100

5

21 29

1

1 Pump, SQE

2 Cable

3 Cable clips

5 Control unit, CU 300

11 Level sensor

21 Mains connection

22 Riser pipe

29 Remote control, R100

30 Safety cable

31 Wire clamp

R100

Warning (max.)

Desired level

Warning (min.) Recommended min. 20 inches (0.5 m)

Min. 0.5 m

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2 Cable

3 Cable clips

5 Control unit CU 300

11 Level sensor

29 Remote control R100

30 Safety cable

31 Wire clamp

Applications

SQ, SQE, SQE-NE,

CU331SP

2

10

Emptying or filling a tank

The SQE pump with CU 300 is ideal for emptying or

filling a tank.

Fig. 9 Application example: Emptying or filling a tank

TM01 8649 4801

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2 Cable

3 Cable clips

5 Control unit CU 300

11 Level sensor

22 Riser pipe

27 Flow sleeve with strainer and

supporting brackets

29 Remote control R100

30 Safety cable

31 Wire clamp

22

29

2

3

30

1

31

29

R100

22

3

2

5

21

27

11

1

5

21

R100

11

Min. 20 inches

(0.5 m)

Recommended

min. 20 inches

(0.5 m)

1 Pump, SQE

2 Cable

3 Cable clips

5 Control unit, CU 300

11 Level sensor

21 Mains connection

22 Riser pipe

27 Flow sleeve with strainer and supporting brackets

29 Remote control, R100

30 Safety cable

31 Wire clamp

R100 R100

Max. (start)

Min. (stop)

Recommended

min. 20 inches

(0.5 m)

Applications

SQ, SQE, SQE-NE,

CU331SP 2

11

Pumping from one tank to another

The SQE pump is ideal for pumping water from one

tank to another.

Sensors

Fig. 10 Application example: Pumping from one tank to another

Level Description Light indication on

CU 300

Level sensor (pos. 11, tank at top)

Max. (stop) When the water has reached

this level, the pump stops.

Green indicator light

in on/off button is

flashing.

Min. (start) When the water has dropped

to this level, the pump starts.

Green indicator light

in on/off button is

permanently on.

Level sensor (pos. 11, tank at bottom)

Max. (start) When the water has reached

this level, the pump starts.

Green indicator light

in on/off button is

on.

Min. (stop) When the water has dropped

to this level, the pump stops.

Green indicator light

in on/off button is

flashing.

TM01 2454 4801

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2 Cable

3 Cable clips

5 Control unit CU 300

11 Level sensor

27 Flow sleeve with strainer and

supporting brackets

29 Remote control R100

22

3

2

1

27

11

21

5

11

R100

29

1 Pump, SQE

2 Cable

3 Cable clips

5 Control unit, CU 300

11 Level sensor

21 Mains connection

22 Riser pipe

27 Flow sleeve with strainer and supporting brackets

29 Remote control, R100

R100

Max. (start)

Min. (stop)

Recommended min. 20 inches

(0.5 m)

Max. (stop)

Min. (start)

Applications

SQ, SQE, SQE-NE,

CU331SP

2

12

Setting of operating parameters

Using the R100 and the CU 300 enables change of the

motor speed and thereby setting of the pump to a

specific performance.

The software program "SQE Speed Calculation" has

been developed for the calculation of the speed in

order to obtain the required flow rate and head.

Dry-running protection

The value Pcut-out, ensuring dry-running protection, is

factory-set for the SQE pump.

If the speed of the SQE pump is reduced by more than

1000 rpm, the Pcut-out value must be readjusted by

means of the CU 300 and R100.

Fig. 11 Application example: Workshop setting of operating parameters

TM01 8650 4801

Part Type No. of units Product number Unit price Total price

Pump SQE

Remote control R100

Control unit CU 300

SQE Speed Calculation program

Note: The SQE pump must not be started until the

pump has been completely submerged below the water

table. However, the change of the motor speed can be

made even if the pump is not submerged.

R100

CU 300

SQE

Applications

SQ, SQE, SQE-NE,

CU331SP 2

13

SQE with manual speed control

Functioning and benefits

Manual speed control of the SQE pumps is possible by

means of R100 and an SPP 1 potentiometer.

This application is especially suitable for sampling

from groundwater monitoring wells. The monitoring

well is purged at high speed and the sample is taken at

a low speed (quiet flow). For contaminated

groundwater the SQE-NE type range is recommended.

In case frequent sampling is required, dedicated

installation of the pump is recommended, thus

eliminating wear caused by frequent assembly and

dismantling the installation.

Furthermore, dedicated installations saves the costs of

assembling and dismantling the installation.

Important: Through dedicated installation the transfer

of contamination from one monitoring well to another is

avoided.

Dry-running protection

The value Pcut out, ensuring dry-running protection, is

factory-set for the SQE pump. If the speed of the pump

is reduced more than 1,000 rpm, the value of Pcut out

must be readjusted by means of CU 300 and R100.

Fig. 12 Application example: Sampling/manual speed control of SQE

TM01 9028 4801

21

325

22

2

3

31

1

30

1 SQE pump

2 Cable

3 Cable clips

5 Control unit, CU 300

21 Mains connection

22 Riser pipe

30 Stainless-steel safety cable

31 Stainless-steel wire clamps, 2 per lifting eye

32 Potentiometer, SPP 1

Recommended

min. 20 inches

(0.5 m)

Min. 20 inches

(0.5 m)

Pos. Part Type No. of units Product number Unit price Total price

1Pump SQE

2Cable

3Cable clips

5 Control unit CU 300

22 Riser pipe

30 Stainless-steel safety cable

31 Wire clamps 2 per lifting eye

32 Potentiometer SPP 1

Performance range

SQ, SQE, SQE-NE,

CU331SP

3

14

3. Performance range

TM02 9975 2010

0 4 8 12 16 20 24 28 32 36 Q [US GPM]

30

40

60

80

100

150

200

300

400

600

800

[ft]

H

0 2 4 6 8 Q [m³/h]

1010

20

30

40

50

60

70

80

90

100100

200

[m]

H

SQ

ISO 9906 Annex A

SQE

SQE-NE

5 SQ, SQE

10 SQ, SQE, SQE-NE

15 SQ, SQE

22 SQ, SQE, SQE-NE

30 SQ, SQE

Installation

SQ, SQE, SQE-NE,

CU331SP 4

15

4. Installation

The SQ and SQE, SQE-NE may be installed vertically,

horizontally or in any position in between.

Note: The pump must not fall below the horizontal

level in relation to the motor.

The following features ensure simple installation of the

pump:

• Built-in check valve with spring

• low weight ensuring user-friendly handling

• installation in 3" or larger boreholes

• only on/off switch is needed, which means that no

extra motor starter / starter box is necessary.

For horizontal installation a flow sleeve is

recommended in order to:

• ensure sufficient flow velocity past the motor and

thus provide sufficient cooling

• prevent motor and electronic unit from being buried

in sand or mud.

Fig. 13 SQE installation

TM01 1375 1498

Allowed

Not allowed

Sizing and selection

SQ, SQE, SQE-NE,

CU331SP

5

16

5. Sizing and selection

System sizing guide

Step 1

Calculate minimum head requirements at no flow conditions:

Hmax (required) = dynamic head + system pressure (in feet) + above grade elevation + friction loss

Step 2

Select pump from chart as follows:

• Choose model family based on the desired flow rate (i.e. 15SQE for a flow rate of 15 gpm)

• Select the first model with a value in Column 2 greater than the Hmax calculated in Step 1

(For example: the choice for a 22 gpm model with an Hmax of 140 ft would be the 22SQE-160).

• Double check your selection in the performance curves; see 7. SQ curve charts on p. 18.

Fig. 14 Recommended sizing

Note: All calculated head requirements must lie

between the selected pump models minimum and

maximum speed curves.

System sizing matrix

Column 1 Column 2

Pump type

Model B

Shutoff head (0

gpm)

@ 3000 rpm

min. speed

Head @ rated gpm

@ 10700 rpm

max. speed

TDH [feet] TDH [feet]

5SQE-90 11 86

5SQE-140 17 131

5SQE-180 22 177

5SQE-230 28 222

5SQE-270 34 270

5SQE-320 39 315

5SQE-360 45 360

5SQE-410 51 405

5SQE-450 56 450

10SQE-110 12 105

10SQE-160 17 164

10SQE-200 23 215

10SQE-240 29 267

10SQE-290 34 328

10SQE-330 40 390

15SQE-70 10 75

15SQE-110 14 123

15SQE-150 19 164

15SQE-180 24 205

15SQE-220 29 246

15SQE-250 33 287

15SQE-290 38 328

22SQE-40 5 36

22SQE-80 9 77

22SQE-120 14 117

22SQE-160 18 159

22SQE-190 23 200

22SQE-220 27 240

30SQE-40 5 33

30SQE-90 11 82

30SQE-130 16 126

TM01 8547 0400

Pump curve

at 10,700 ft

Pump curve

at 3,000 rpm

Max. head at rated flow

Max. head at no flow

Cable sizing

SQ, SQE, SQE-NE,

CU331SP 6

17

6. Cable sizing

Cable sizing chart

Cable length in feet.

Note: shaded values do not apply when using a CU 301 as its max. recommended cable length is 650 ft.

Motor rating Copper wire size (AWG)

VoltsHpAmps1412108642

115 0.5 12 140 220 360 550 880 1390 2260

230 0.5 5.2 640 1000 1660 2250 4060 — —

230 0.75 8.4 400 620 1030 1580 2510 3970 —

230 1 11.2 300 460 770 1190 1890 2980 4850

230 1.5 12 280 430 720 1110 1760 2780 4530

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP

7

18

7. SQ curve charts

5 SQ, SQE

TM04 7463 2010

0 1 2 3 4 5 6 Q [US GPM]

0

100

200

300

400

500

600

700

800

[ft]

H

0

50

100

150

200

250

[m]

H

5 SQ

ISO 9906 Annex A

5 SQE

-450

-410

-360

-320

-270

-230

-180

-140

-90

0 1 2 3 4 5 6 Q [US GPM]

0

8

16

24

[ft]

H

0

2

4

6

[m]

H

0.0 0.4 0.8 1.2 1.6 Q [m³/h]

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP 7

19

10 SQ, SQE

TM04 7464 2010

0 1 2 3 4 5 6 7 8 9 10 11 12 13 Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

[ft]

H

0

20

40

60

80

100

120

140

160

[m]

H

10 SQ

ISO 9906 Annex A

10 SQE

-330

-290

-240

-200

-160

-110

0 1 2 3 4 5 6 7 8 9 10 11 12 13 Q [US GPM]

0

10

20

30

[ft]

H

0

4

8

[m]

H

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 Q [m³/h]

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP

7

20

15 SQ, SQE

TM04 7465 2010

0 2 4 6 8 10 12 14 16 18 Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

[ft]

H

0

40

80

120

[m]

H

15 SQ

ISO 9906 Annex A

15 SQE

-290

-250

-220

-180

-150

-110

-70

0 2 4 6 8 10 12 14 16 18 Q [US GPM]

0

10

20

30

[ft]

H

0

4

8

[m]

H

0 1 2 3 4 Q [m³/h]

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP 7

21

22 SQ, SQE

TM04 7466 2010

0 4 8 12 16 20 24 28 Q [US GPM]

0

40

80

120

160

200

240

280

320

360

[ft]

H

0

20

40

60

80

100

[m]

H

22 SQ

ISO 9906 Annex A

22 SQE

-220

-190

-160

-120

-80

-40

0 4 8 12 16 20 24 28 Q [US GPM]

0

10

20

30

[ft]

H

0 2 4 6 Q [m³/h]

0

4

8

[m]

H

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP

7

22

30 SQ, SQE

TM04 7467 2010

0 4 8 12 16 20 24 28 32 36 Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

[ft]

H

0

10

20

30

40

50

60

[m]

H

30 SQ

ISO 9906 Annex A

30 SQE

-130

-90

-40

0 4 8 12 16 20 24 28 32 36 Q [US GPM]

0

10

20

30

[ft]

H

0

4

8

[m]

H

0 2 4 6 8 Q [m³/h]

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP 7

23

10 SQE-NE

TM04 7468 2010

0 2 4 6 810 12 Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

[ft]

H

0

20

40

60

80

100

120

140

160

[m]

H

ISO 9906 Annex A

10 SQE - NE

-340

-300

-260

-220

-180

-140

-100

0 2 4 6 810 12 Q [US GPM]

0

10

20

30

[ft]

H

0

4

8

[m]

H

0 1 2 3Q [m³/h]

NPSH

SQ curve charts

SQ, SQE, SQE-NE,

CU331SP

7

24

22 SQE-NE

TM04 7469 2010

0 4 812 16 20 24 28Q [US GPM]

0

40

80

120

160

200

240

280

320

[ft]

H

0

20

40

60

80

100

[m]

H

ISO 9906 Annex A

22 SQE - NE

-210

-180

-140

-110

-80

-40

0 4 812 16 20 24 28Q [US GPM]

0

8

16

24

[ft]

H

0

2

4

6

[m]

H

0 2 4 6 Q [m³/h]

NPSH

Technical data

SQ, SQE, SQE-NE,

CU331SP 8

25

8. Technical data

Electrical data

Control units CU 300 and CU 301

Operating conditions

Storage conditions

Supply voltage: 1x200-240V +6%/-10%, 50/60 Hz, PE

1x100-115V +6%/-10%, 50/60 Hz, PE

Operation via generator: As a minimum, the generator output must be equal to the motor P1[kw] + 10%

Starting current: The motor starting current is equal to the highest value stated on the motor nameplate

Starting: Soft Start

Run-up time: Maximum: 2 seconds

Motor protection:

Motor is protected against:

– Dry running

– overvoltage

– undervoltage

– overload

– overtemperature.

Power factor: PF=1

Motor cable: 3 wire, 14AWG XLPE, 5 ft

Motor liquid: Type SML 2

pH Values: SQ and SQE: 5 to 9

SQE-NE: 2 to 13

Liquid temperature: The temperature of the pumped liquid must not exceed 86 °F (30 °C)

Note: If liquids with a viscosity higher than that of water are to be pumped, please contact Grundfos.

Voltage: 1 x 100-240 V – 10 %/+ 6 %, 50/60 Hz, PE

Power consumption: 5 W

Current consumption: Maximum 130 mA

Enclosure class: IP 55

Ambient temperature: During operation: –22 °F to +122 °F (–30 °C to +50 °C)

During storage: –22 °F to 140 °F ( –30 °C to +60 °C)

Relative air humidity: 95 %.

Pump cable: Maximum length between CU 300 or CU 301 and pump: 650 ft (198 m)

Back-up fuse: Maximum: 16 A

Radio noise: CU 300 and CU 301 comply with EMC Directive 89/336/EEC.

Approved according to the standards EN 55014 and EN 55014-2

Marking: CE, cUL (CU 301)

Load: Max. 100 mA

Minimum ambient fluid temperature: +34 °F (+1 °C)

Maximum ambient fluid temperature: +86 °F (+30 °C)

Well diameter: 3-inch or larger

Installation depth (maximum): 500 feet below static water level

Minimum ambient temperature: –4 °F (–20 °C)

Maximum ambient temperature: +140 °F (+60 °F)

Frost protection: If the pump has to be stored after use, it must be stored at a frost-free location, or it must be ensured that

the motor liquid is frost-proof.

Technical data

SQ, SQE, SQE-NE,

CU331SP

8

26

Motor data

Pump type Hp Voltage Full load amps Overload amps Min.

well

diameter Discharge

230V 115V 230V 115V

5SQE05-90 1/2 230V / 115V 2.1 4.2 5 11 3" 1" NPT

5SQE05-140 1/2 230V / 115V 2.9 6.0 5 11 3" 1" NPT

5SQE05-180 1/2 230V / 115V 3.7 7.7 5 11 3" 1" NPT

5SQE07-230 3/4 230V 4.6 - 8 - 3" 1" NPT

5SQE07-270 3/4 230V 5.3 - 8 - 3" 1" NPT

5SQE07-320 3/4 230V 6.2 - 8 - 3" 1" NPT

5SQE10-360 1 230V 7.2 - 11 - 3" 1" NPT

5SQE10-410 1 230V 8.1 - 11 - 3" 1" NPT

5SQE15-450 1 1/2 230V 9.2 - 12 - 3" 1" NPT

10SQE05-110 1/2 230V / 115V 2.9 6.1 5 11 3" 1 1/4" NPT

10SQE05-160 1/2 230V / 115V 4.1 8.6 8 11 3" 1 1/4" NPT

10SQE07-200 3/4 230V 5.3 - 8 - 3" 1 1/4" NPT

10SQE7-240 3/4 230V 6.0 - 8 - 3" 1 1/4" NPT

10SQE10-290 1 230V 7.7 - 11 - 3" 1 1/4" NPT

10SQE15-330 1 1/2 230V 8.9 - 12 3" 1 1/4" NPT

15SQE05-70 1/2 230V / 115V 2.9 6.0 5 11 3" 1 1/4" NPT

15SQE05-110 1/2 230V / 115V 4.0 8.3 5 11 3" 1 1/4" NPT

15SQE07-150 3/4 230V 5.1 - 8 - 3" 1 1/4" NPT

15SQE07-180 3/4 230V 6.2 - 8 - 3" 1 1/4" NPT

15SQE10-220 1 230V 7.4 - 11 - 3" 1 1/4" NPT

15SQE10-250 1 230V 8.4 - 11 - 3" 1 1/4" NPT

15SQE15-290 1 1/2 230V 9.7 - 12 - 3" 1 1/4" NPT

22SQE05-40 1/2 230V / 115V 1.9 3.9 5 - 3" 1 1/2" NPT

22SQE05-80 1/2 230V / 115V 3.4 7.2 5 - 3" 1 1/2" NPT

22SQE07-120 3/4 230V 4.9 - 8 - 3" 1 1/2" NPT

22SQE10-160 1 230V 6.4 - 8 - 3" 1 1/2" NPT

22SQE10-190 1 230V 7.9 - 11 - 3" 1 1/2" NPT

22SQE15-220 1 1/2 230V 9.5 - 12 - 3" 1 1/2" NPT

30SQE05-40 1/2 230V / 115V 2.8 5.7 5 - 3" 1 1/2" NPT

30SQE07-90 3/4 230V 5.2 - 8 - 3" 1 1/2" NPT

30SQE10-130 1 230V 7.6 - 11 - 3" 1 1/2" NPT

Technical data

SQ, SQE, SQE-NE,

CU331SP 8

27

Dimensions and weights

SQ, SQE

SQE-NE

Model Hp Motor

size Discharge

size

Dimensions in inches Approx.

ship. wt.

ABCDE

5SQ/SQE05-90 1/2 3" 1" NPT 30.4 19.8 10.6 2.6 2.9 12

5SQ/SQE05-140 1/2 3" 1" NPT 30.4 19.8 10.6 2.6 2.9 12

5SQ/SQE05-180 1/2 3" 1" NPT 31.5 19.8 11.6 2.6 2.9 12

5SQ/SQE07-230 3/4 3" 1" NPT 33.6 19.8 13.7 2.6 2.9 13

5SQ/SQE07-270 3/4 3" 1" NPT 33.6 19.8 13.7 2.6 2.9 13

5SQ/SQE07-320 3/4 3" 1" NPT 34.6 19.8 14.8 2.6 2.9 13

5SQ/SQE10-360 1 3" 1" NPT 38.2 21.3 16.9 2.6 2.9 16

5SQ/SQE10-410 1 3" 1" NPT 38.2 21.3 16.9 2.6 2.9 16

5SQ/SQE15-450 1 1/2 3" 1" NPT 39.3 21.3 18.0 2.6 2.9 16

10SQ/SQE05-110 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

10SQ/SQE05-160 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

10SQ/SQE07-200 3/4 3" 1 1/4" NPT 31.5 19.8 11.6 2.6 2.9 13

10SQ/SQE07-260 3/4 3" 1 1/4" NPT 33.6 19.8 13.7 2.6 2.9 13

10SQ/SQE10-290 1 3" 1 1/4" NPT 35.0 21.3 13.7 2.6 2.9 16

10SQ/SQE15-330 1 1/2 3" 1 1/4" NPT 36.14 21.3 14.8 2.6 2.9 16

15SQ/SQE05-70 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

15SQ/SQE05-110 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

15SQ/SQE07-150 3/4 3" 1 1/4" NPT 31.5 19.8 11.6 2.6 2.9 13

15SQ/SQE07-180 3/4 3" 1 1/4" NPT 33.6 19.8 13.7 2.6 2.9 13

15SQ/SQE10-220 1 3" 1 1/4" NPT 35.0 21.3 13.7 2.6 2.9 16

15SQ/SQE10-250 1 3" 1 1/4" NPT 36.1 21.3 14.8 2.6 2.9 16

15SQ/SQE10-290 1 1/2 3" 1 1/4" NPT 38.2 21.3 16.9 2.6 2.9 16

22SQ/SQE05-40 1/2 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 12

22SQ/SQE05-80 1/2 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 12

22SQ/SQE07-120 3/4 3" 1 1/2" NPT 31.5 19.8 11.6 2.6 2.9 13

22SQ/SQE10-160 1 3" 1 1/2" NPT 33.6 19.8 13.7 2.6 2.9 13

22SQ/SQE10-190 1 3" 1 1/2" NPT 38.2 21.3 16.9 2.6 2.9 16

22SQ/SQE15-220 1 1/2 3" 1 1/2" NPT 38.2 21.3 16.9 2.6 2.9 16

30SQ/SQE05-40 1/2 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 12

30SQ/SQE07-90 3/4 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 13

30SQ/SQE10-130 1 3" 1 1/2" NPT 35.0 21.3 13.7 2.6 2.9 13

10SQE-05-100NE 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

10SQE-05-140NE 1/2 3" 1 1/4" NPT 30.4 19.8 10.6 2.6 2.9 12

10SQE-05-180NE 3/4 3" 1 1/4" NPT 31.5 19.8 11.6 2.6 2.9 13

10SQE-07-220NE 3/4 3" 1 1/4" NPT 33.6 19.8 13.7 2.6 2.9 13

10SQE-10-260NE 1 3" 1 1/4" NPT 35.0 21.3 13.7 2.6 2.9 16

10SQE-10-300NE 1 3" 1 1/4" NPT 36.1 21.3 14.8 2.6 2.9 16

10SQE-10-340NE 1 3" 1 1/4" NPT 38.2 21.3 16.9 2.6 2.9 16

22SQE05-40NE 1/2 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 12

22SQE05-80NE 1/2 3" 1 1/2" NPT 30.4 19.8 10.6 2.6 2.9 12

22SQE07-110NE 3/4 3" 1 1/2" NPT 31.5 19.8 11.6 2.6 2.9 13

22SQE07-140NE 3/4 3" 1 1/2" NPT 33.6 19.8 13.7 2.6 2.9 13

22SQE10-180NE 1 3" 1 1/2" NPT 38.2 21.3 16.9 2.6 2.9 16

22SQE10-210NE 1 3" 1 1/2" NPT 38.2 21.3 16.9 2.6 2.9 16

Construction

SQ, SQE, SQE-NE,

CU331SP

9

28

9. Construction

Materials of construction

SQ, SQE SQE-NE

TM04 7522 2110

Component Splined shaft Component Splined shaft

Valve casing Polyamide Valve casing PVDF

Discharge chamber 304 stainless steel Discharge chamber 316 stainless steel

Valve guide Polyamide O-ring FPM rubber

Valve spring 316LN stainless steel Valve cone PVDF

Valve cone Polyamide Valve seat FPM rubber

Valve seat NBR rubber Top chamber PVDF

O-ring NBR rubber Empty chamber PVDF

Lock ring 310 stainless steel Top bearing FPM rubber

Top bearing NBR rubber Neck ring PVDF

Top chamber Polyamide Lock ring 316 stainless steel

Guide vanes Polyamide Guide vanes PVDF

Impeller Polyamide w/ tungsten

carbide bearings Bottom chamber PVDF

Bottom chamber Polyamide Impeller w/ tungsten

carbide bearing PVDF

Neck ring TPU / PBT Suction interconnector PVDF

Bearing Aluminum oxide Ring 316 stainless steel

Suction interconnector Polyamide Shaft w/coupling Sintered steel

Ring 304 stainless steel 316 stainless steel

Pump sleeve 304 stainless steel Cable guard 316 stainless steel

Pressure equalization cone Polyamide Cable guard screws 316 stainless steel

Spacer Polyamide Pressure equalization cone PVDF

Sand trap 316 stainless steel Valve spring 316 stainless steel

Shaft w/coupling 304 stainless steel Pump sleeve 316 stainless steel

Cable guard 304 stainless steel Valve guide PVDF

Spacer 316 stainless steel

Discharge sizes:

1" NPT

1 1/4" NPT

1 1/2" NPT

5 SQ/SQE

10 - 15 SQ/SQE

22-30 SQ/SQE

Construction

SQ, SQE, SQE-NE,

CU331SP 9

29

Material specification

Pump

Pos. Component Material DIN

W-Nr.

SQ/SQE AISI DIN

W-Nr.

SQ/-NE AISI

1 Valve casing Polyamide 1.4301 304 1.4401 316

1a Discharge chamber Stainless steel

1d O-ring NBR rubber

2 Valve cup Polyamide

3 Valve seat NBR rubber

4a Empty chamber Polyamide

6 Top bearing NBR rubber

7 Neck ring TPU / PBT

7a Lock ring Stainless

spring steel 1.4301 310 1.4401 316

7b Neck ring retainer Polyamide

9b Chamber top Polyamide

9c Chamber bottom Polyamide

13

Impeller with

tungsten carbide

bearing

Polyamide

14 Suction

inter-connector Polyamide

14a Ring Stainless steel 1.4301 304 1.4401 316

16 Shaft with coupling Stainless steel 1.4301 304 1.4401 316

Sintered steel

18 Cable guard Stainless steel 1.4301 304 1.4401 316

18a

18b Screws for cable guard Stainless steel 1.4301 316 1.4401 316

30 Cone for pressure

equalization Polyamide

32 Guide vanes Polyamide

39 Spring Stainless

spring steel 1.4406 316LN 1.4406 316LN

55 Pump sleeve Stainless steel 1.4301 304 1.4401 316

64 Priming screw Polyamide

70 Valve guide Polyamide

86 Lip seal ring NBR rubber

87 Cone for pressure

equalization complete

Polyamide /

NBR rubber

TM01 2745 2010

Motor

Pos. Component Material DIN

W-Nr.

SQ-SQE AISI DIN

W-Nr.

SQE-NE AISI

201 Stator Stainless steel 1.4301 304 1.4401 316

202 Rotor Stainless steel 1.4301 304 1.4401 316

202a Stop ring PP

202b Filter Polyester

203 Thrust bearing Carbon

205 Radial bearing Ceramic

tungsten carbine

220 Motor cable with plug EPR

222a Filling plug MS 3: NBR

MSE 3: FKM

224 O-ring FKM

225 Top cover PPS

232 Shaft seal MS 3: NBR

MSE 3: FKM

Motor liquid SML-2

1d

7a

1

70

2

39

3

1a

55

16

30

86

87

64

18

18b

18a

6

4a

9b

32

13

9c

7

14

14a

7b

202a

202

202b

222a

232

203

224

205

225

201

220

Control units

SQ, SQE, SQE-NE,

CU331SP

10

30

10. Control units

CU 301

The CU 301 is a control and communication unit

developed especially for the SQE submersible pumps

in constant-pressure applications.

The CU 301 control unit provides:

• Full control of the SQE pumps

• two-way communication with the SQE pumps

• possibility of adjusting the pressure

• alarm indication (LED) when service is needed

• possibility of starting, stopping and resetting the

pump simply by means of a push-button

• configuration with R100 remote control.

The CU 301 communicates with the pump via mains

borne signalling (Power Line Communication),

meaning that no extra cables are required between the

CU 301 and the pump.

The CU 301 features the following indications

(see drawing in right column):

1. Pump running indicator

2. System pressure setting

3. System ON/OFF

4. Button lock indicator

5. Dry-running indicator

6. Service needed in case of:

– – no contact to pump

– overvoltage

– undervoltage

– speed reduction

– overtemperature

– overload

– sensor defective.

The CU 301 incorporates:

• External signal input for pressure sensor

• connection to an operating relay for indication of

pump operation.

Optional R100 remote control

Wireless infrared remote control of the CU 301 is

possible by means of the R100.

Using the R100, it is possible to monitor and change

the operating parameters, see the R100 menu

structure on page 31.

The R100 is a valuable tool in case fault finding is

required.

Fig. 15 CU 301 control unit

Fig. 16 CU 301 entry ports

Fig. 17 CU 301 dimensions

TM03 3426 0406TM02 3427 0406TM03 3003 2010

bar

5.0

4.5

4.0

3.5

3.0

2.5

2.0

23

4

1

5

6

R 100

R100

Pressure

sensor entry

Power supply

entry

Submersible drop

cable entry

Operating

relay entry

9.13 in.

(232 mm)

4.49 in.

(114 mm)

7.68 in.

(195 mm)

bar

5.0

4.5

4.0

3.5

3.0

2.5

2.0

Control units

SQ, SQE, SQE-NE,

CU331SP 10

31

R100 menu structure for CU 301 control unit

1.1

1.2

1.3

2.1

2.2

2.3

2.4

2.5

2.6

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

1.4

1.5

1.6

1.7

1.8

Note: This menu is an example, not the factory setting.

Start

Contrast

Setting

Light

0. General 1. Operation 2. Status 3. Installation

3.10

USB

version

only

Control units

SQ, SQE, SQE-NE,

CU331SP

10

32

R100 menus for CU 301

0. General

1. Operation

1.1 Setpoint setting

1.2 Selection of operating mode

1.3 Alarm indication.

2. Status

The indication of:

2.1 Actual operating mode

2.2 Actual pressure

2.3 Actual motor speed

2.4 Actual motor temperature

2.5 Actual power input and accumulated motor power

consumption

2.6 Accumulated number of operating hours and

accumulated number of starts.

3.Installation

3.1 Sensor parameters

3.2 Choice of sensor

3.3 Setting of maximum pressure setpoint

3.4 Setting of automatic restart time

3.5 Setting of the dry-running stop limit

3.6 Setting of the maximum motor speed

3.7 Setting of the cut-in motor speed

3.8 Activating or deactivating the on/off-button and

the buttons for system pressure setting on the

CU 301

3.9 Indication of pump operation

3.10 Allocation of identification number.

Control units

SQ, SQE, SQE-NE,

CU331SP 10

33

CU 300

The CU 300 is a control and communication unit

developed especially for the SQE submersible pumps

for control applications other than constant pressure.

The CU 300 control unit provides:

• Flexible pump control based on various sensor

inputs

• two-way communication with the SQE pumps

• alarm indication of pump operation by LED’s on the

front

• possibility of starting, stopping and resetting the

pump simply by means of a push-button

• communication with R100 remote control.

The CU 300 communicates with the pump via mains

borne signalling (Power Line Communication),

meaning that no extra cables are required between the

CU 300 and the pump.

The following alarms can be indicated by the CU 300:

• No contact

•overvoltage

• undervoltage

• dry running

• speed reduction

• overtemperature

•overload

• sensor alarm.

The CU 300 incorporates:

• External signal input for two analog sensors and

one digital sensor

• relay output for external alarm indication

• control according to the signals received, e.g. of

flow, pressure, water level and conductivity.

R100 remote control

Wireless infrared remote control of the CU 300 is

possible by means of the R100.

Using the R100, it is possible to monitor and change

the operating parameters, see the R100 menu

structure on page 34.

The R100 is a valuable tool in case fault finding is

required.

Fig. 18 CU 300 control unit with R100

Fig. 19 CU 300 control unit, external entry ports

Fig. 20 CU 300 dimensions

TM01 2760 4801TM01 2761 4801TM01 2781 2010

LED alarm

indication On/Off button with

red and green

indicator lights

IR communication

R100

Power supply entry

Submersible drop

cable entry

Extra cable

entries

Fieldbus

entry

Sensor

entries

9.14 in.

(232 mm) 4.49 in.

(114 mm)

7.68 in.

(195 mm)

Control units

SQ, SQE, SQE-NE,

CU331SP

10

34

R100 menu structure for the CU 300

1.1

1.2

1.3

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

3.11

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

3.12

4.9

2.9

4.10

1.4

1.5

1.6

1.7

1.8

Start

Contrast

Setting

Light

0. General 1. Operation 2. Status 4. Installation3. Limits

Note: This menu is an example, not the factory setting.

USB

version

only

Control units

SQ, SQE, SQE-NE,

CU331SP 10

35

R100 menus for CU 300

0. General

1. Operation

1.1 Setpoint setting

1.2 Selection of operating mode

1.3 Alarm indication.

2. Status

The indication of:

2.1 Actual operating mode

2.2 Actual and external setpoint

2.3 Actual motor temperature

2.4 Actual motor speed

2.5 Actual power input and accumulated motor power

consumption

2.6 Accumulated number of operating hours and

accumulated number of starts

2.7 Actual values of sensors 1 and 2, respectively

2.8 Actual values of the digital input

2.9 Accumulated flow, and the power used to pump.

R100 offers the possibility of making a number of

settings.

3. Limits

The setting of:

3.1 Sensor 1 parameters

3.2 Min. and max. stop limits of sensor 1

3.3 Min. and max. warning limits of sensor 1

3.4 Min. and max. alarm limits of sensor 1

3.5 Sensor 2 parameters

3.6 Min. and max. stop limits of sensor 2

3.7 Min. and max. warning limits of sensor 2

3.8 Min. and max. alarm limits of sensor 2

3.9 Filling or emptying

3.10 Setting of the function of the digital sensor

connected to the digital input

3.11 The setting of the water quantity stop limit and

the setting of the sensor to detect water quantity

3.12 The setting of the temperature warning limits of

the motor electronics.

4. Installation

4.1 Selection of controller — open loop, closed loop

4.2 Setting of external setpoint

4.3 Setting of automatic restart time

4.4 Allocation of individual start delays

4.5 Setting of the stop and run times for the

dewatering function

4.6 Setting of the dry-running stop limit

4.7 Activating or deactivating the dry-running

protection

4.8 Setting of the maximum motor speed

4.9 Activating or deactivating the on/off-button on the

CU 300

4.10 Allocation of ID number where more than one

CU 300 is installed.

Control units

SQ, SQE, SQE-NE,

CU331SP

10

36

Examples of R100 displays

Menu OPERATION

Setpoint setting

1.1

From factory, the pump is set to maximum speed,

10,700 rpm. R100 makes it possible to reduce the

pump speed by changing the setpoint. The speed can

be set to 3,000 - 10,700 rpm, at 100 rpm intervals.

The unit of the setpoint is automatically changed

according to the unit of the sensor connected to sensor

input 1.

Example: Sensor input 1 is connected to a pressure

sensor using the unit feet (ft) and the range 0-60.

Consequently, the setpoint of display 1.1 can be set to

between 0-60 ft.

Menu STATUS

The displays appearing in this menu are status

displays only. It is not possible to change settings in

this menu.

Accumulated flow

2.9

In display 2.9, the water quantity (m3)* pumped is

shown. The value shown is the accumulated flow

registered by the sensor selected in display 3.11.

The power used to pump 1 m3 is shown in the display

as energy per m3 (kWh/m3).

It is possible to read the status of the accumulated flow

and energy per m3 at any time.

*Water quantity in units of gpm can be chosen.

Accumulated number of operating hours and

number of starts

2.6

The number of operating hours and the number of

starts are values accumulated from the time of

installation and they cannot be reset.

Both values are stored in the motor electronics, and

they are kept even if the CU 300 is replaced.

The number of operating hours is registered every two

hours of continuous operation.

Menu LIMITS

Sensor 1

3.1

The setting of sensor 1.

Depending on the type of sensor, the following settings

can be made:

• Sensor outputs:

– (not active), 0-10 V, 2-10 V, 0-20 mA, 4-20 mA

• setting range unit: m3/h, m, %, gpm, ft

• sensor minimum value: 0-249 (0, 1, 2, 3.....249)

• sensor maximum value: 1-250 (1, 2, 3, 4.....250).

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

37

11. CU331SP variable frequency drive

Features

User interface

The user interface offers these possibilities:

• Local operation via a control panel with graphic

display where the menu structure is based on the

well-known system from Grundfos E-pumps.

• Monitoring of operating status via indicator lights

and signal relays.

• Display of alarm or warning and logging of the last

five alarms and warnings.

Functions

Control mode: Constant pressure

The CU331SP has only one control mode, Constant

pressure. The pressure is kept constant,

independently of the flow rate.

Start-up guide

The CU331SP has a start-up guide, which is launched

at the first power up. Parameters are set manually on

the basis of the installation. The start-up guide can be

repeated, if necessary.

Thanks to the start-up guide, the installer can quickly

set a few parameters and put the CU331SP into

operation.

Direction of rotation test

During start-up, the CU331SP automatically tests and

sets the correct direction of rotation without changing

the cable connections. The direction of rotation test

can be performed manually if it fails for any reason.

Dry-running protection

To protect the pump, the CU331SP will automatically

set up dry-run protection so that water shortage can be

detected. The dry-run alarm will automatically reset 30

minutes after the alarm is declared.

Low-flow stop function

The low-flow stop function is used for changing

between on/off operation at low flow rate and

continuous operation at high flow rate.

The low-flow stop function protects the pump and

saves energy.

Applications

For 4" or larger wells. Main applications:

• Domestic and light commercial water supply

• irrigation

• livestock watering

• water transfer.

System components

• Compact, efficient, and reliable variable frequency

drive

• rugged stainless steel pump end and proven,

reliable, 3-phase motor

• pressure sensor

• diaphragm tank (sold separately).

Fig. 21 CU331SP variable frequency drive and sensor

TM05 5801 4012

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

38

Identification

Nameplate

The CU331SP can be identified by means of the

nameplate. An example is shown below.

Fig. 22 Example of nameplate

TM05 6001 4012

Key

Text Description

T/C: CU-331 (product name)

Prod.no: Product number (98370280)

S/N:

Serial number (000201H462)

The last four digits indicate the production date. In

this case, 46 is the week, and 2 is the year 2012.

3.0 hp Typical shaft power on the motor

IN: Supply voltage, frequency and maximum input

current.

OUT:

Motor voltage, frequency and maximum output

current. The maximum output frequency usually

depends on the pump type.

Type 12 / IP55 Enclosure class

Tamb. Maximum ambient temperature

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

39

CU331SP product range

CU331SP performance range

CU331SP sizing

Step 1

Calculate maximum head requirements at rated flow

conditions:

Hmax=dynamic head + system psi (in feet) +

friction loss + above grade elevation.

Step 2

Select pump from performance curves as follows:

Select a model in which the calculated value of Hmax is

within the maximum performance curve of the pump.

Refer to section CU331SP curve charts on page 53.

Step 3

Select the CU331SP that corresponds to the correct

motor Hp and enclosure type.

Enclosure type NEMA Hp Input Ph Input volts

Indoor Type 12

2 1 200 - 240

3 1 200 - 240

5 1 200 - 240

Outdoor Type 4X

2 1 200 - 240

3 1 200 - 240

5 1 200 - 240

TM05 6380 5012

2 4 6 8 10 20 40 60 80 100

Q [US GPM]

40

50

60

80

100

150

200

300

400

500

600

800

1000

1500

2000

[ft]

H

SQE

2 Hp

2 Hp

3 Hp

5 Hp

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

40

CU331SP operation

Menu structure

The CU331SP has a start-up guide, which is launched

at the first power up. After the start-up guide, the

CU331SP has a menu structure divided into four main

menus:

0. GENERAL gives access to the start-up guide for

the general setting of the CU331SP.

1. OPERATION enables the setting of setpoint and

resetting of alarms. It is also possible to see the

latest five warnings and alarms.

2. STATUS shows the status of the CU331SP and the

pump. It is not possible to change or set values.

3. INSTALLATION gives access to available

parameters.

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

41

CU331SP menu overview

Fig. 23 Menu overview

START-UP GUIDE 0. GENERAL 1. OPERATION 2. STATUS 3. INSTALLATION

0.1 1.1 2.1 3.1

1/11 0.2 1.2 2.2 3.2

2/11 1.3 2.3 3.3

1.4 2.4 3.4

3/11-7/11

Automatic or manual

setting of the

direction of rotation

8/11 1.5 - 1.9 2.5 3.5

2.6

9/11-10/11

Automatic setting of

Stop and Dry-run

functions

11/11 1.10-1.14 2.7

2.11

2.12

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

42

Operating modes

These operating modes can be selected with the

CU331SP:

• Normal

•Stop

•Min.

•Max.

The operating modes can be set without changing the

setpoint setting.

Normal

The pump operates in constant pressure mode.

Stop

The pump has been stopped by user.

Min. curve

The pump is running at a set minimum speed value.

See fig. 24.

For instance, this operating mode can be used during

periods with a very small flow requirement.

Max. curve

The pump is running at a set maximum speed value.

Fig. 24 Min. and max. curves

Control mode

The CU331SP has been developed specifically to

operate submersible pumps in Constant Pressure

mode. This Closed-Loop control mode uses an analog

pressure transducer to provide pressure feedback to

the drive.

Constant pressure with stop function

The outlet pressure is kept constant at high flow rate

(Q > Qmin). On/off operation at low flow rate. See fig.

25.

Fig. 25 Constant pressure with stop function

The pump is controlled according to a constant

pressure measured after the pump.This means that the

pump offers a constant pressure in the Q-range of

Qmin to Qmax, represented by the horizontal line in the

QH diagram.

Setting the setpoint by means of the

OPERATION menu

The setpoint can be set or changed during operation

using the setpoint display in the "OPERATION" menu

shown below. It is not necessary to run the start guide

to change the setpoint.

Low flow and stop functions

The pump will check the flow regularly by reducing the

speed for a short time. If there is no or only a small

change in pressure, this means that there is low flow.

The speed will be increased until the stop pressure

(actual setpoint + 0.5 x ΔH) is reached and the pump

will stop after a few moments. The pump will restart at

the latest when the pressure has fallen to the start

pressure (actual setpoint - 0.5 x ΔH).

TM03 8813 2507

Max.

Min.

TM03 8477 2507

TM03 8807 3307

Hset

Qmin Qmax

CU331SP

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

43

Operating conditions for the stop

function

It is only possible to use the stop function if the system

incorporates a pressure sensor, a non-return valve and

a diaphragm tank.

The non-return valve must always be installed before

the pressure sensor.

Fig. 26 Position of the pressure sensor and diaphragm

tank

Diaphragm tank

The stop function requires a diaphragm tank of a

certain minimum size. The tank must be installed as

close as possible after the pump and the precharge

pressure must be 0.7 x actual setpoint.

Recommended diaphragm tank size:

If a diaphragm tank of the above size is installed in the

system, the factory setting of ΔH is the correct setting.

If the tank installed is too small, the pump will start and

stop too often.

Setting the direction of rotation

The start-up guide is started the first time the

CU331SP is connected to supply voltage. Then while

going through the start-up guide, the CU331SP tests

and sets the correct direction of rotation without

changing the cable connections to the motor.

The correct direction of rotation can be set in these

ways:

• automatic setting.

• manual setting when the direction of rotation is not

visible.

Automatic setting

The CU331SP automatically tests and sets the correct

direction of rotation without changing the cable

connections.

Automatic setting requires a sensor.

This test is not suitable for all pump types and will in

certain cases not be able to determine for certainty the

correct direction of rotation. In these cases, the

CU331SP changes over to manual setting where the

direction of rotation is determined on the basis of the

installer’s observations.

Manual setting when the direction of rotation is not

visible

The correct direction of rotation is set manually without

changing the cable connections. This requires that it is

possible to observe the head or flow rate.

Status functions

The CU331SP shows the following data:

• power consumption

• operating hours

• measured value

• speed

• input power

• motor current.

The status information can be shown in the display.

Power consumption

The value of the power consumption is an

accumulated value calculated from the pump’s startup

date and cannot be reset. No additional sensor is

required.

Operating hours

The value of operating hours is an accumulated value

calculated from the pump’s startup date and cannot be

reset. No additional sensor is required.

Measured value

Sensor display will show the actual pressure as

received from the pressure transducer.

Speed

Display will show the motor speed in RPM's

(calculated).

Input power

Display will show the power consumption in kW.

Motor current

Display will show the actual motor current being used.

Logging functions

Alarm and warning log

The latest five alarms and five warnings are logged

with a timestamp corresponding to the power-on time

after the fault has occurred. The alarm and warning log

can be shown directly on the display.

See section Warning and alarm list.

TM05 5804 4012

Rated flow

of pump

[gpm (m3/h)]

Typical

diaphragm tank size

[gal (l)]

0-26 (0-6) 2 (7.5)

27-105 (7-24) 4 (15.1)

Pump with non return valve

Diaphragm tank

Pressure sensor

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

44

Signal relays

The table shows the function of the signal relays.

See also fig. 27.

Fig. 27 Terminals for signal relays (normal state, not

activated)

CU331SP installation

Mechanical installation

The individual CU331SP cabinet sizes are

characterized by their enclosures. The table in section

CU331SP technical data shows the relationship of

enclosure class and enclosure type.

Reception and storage

Check on receipt that the packaging is intact, and the

unit is complete. In case of damage during transport,

contact the transport company to file a claim.

Note that the CU331SP is delivered in a packaging

which is not suitable for outdoor storage.

Transportation and unpacking

The CU331SP must only be unpacked at the

installation site to prevent damage during the transport

to the site.

The packaging contains accessory bag(s),

documentation and the unit itself. See fig. 28.

Fig. 28 CU331SP packaging

Space requirements and air circulation

CU331SP units can be mounted side by side, but as a

sufficient air circulation is required for cooling these

requirements must be met:

• Sufficient free space above and below the

CU331SP

• Ambient temperature up to 122°F (50 °C)

• Hang the CU331SP directly on the wall, or fit it with

a back plate. See fig. 29.

Fig. 29 CU331SP hung directly on the wall or fitted with a

back plate

Required free space above and below the CU331SP:

For information about enclosure, see section Enclosure.

Mounting

The CU331SP must be mounted securely on a firm

surface. Ensure that screws are sized appropriately for

the weight of the CU331SP (approximately 60 lbs) and

anchored securely to the mounting surface.

1. Mark and drill holes. See fig. 30; also see

section Main dimensions and weight.

2. Fit the screws, but leave loose. Mount the

CU331SP, and tighten the four screws.

Type Function

Relay 1 • Pump running

Relay 2 •Alarm

TM03 8801 3407

Terminal Function

C1 C2 Common

NO 1 NO 2 Normally open contact

NC1 NC2 Normally closed contact

TM05 5990 4012

TM03 8859 2607

Enclosure Space [in (mm)]

B1 7.9 (200)

Accessory bag

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

45

Fig. 30 Drilling holes for mounting

CU331SP electrical connection

Ensure the correct grounding and protection

procedures are used for the installation. Before the

electrical installation, ensure that the power supply and

other voltage inputs are switched off.

Electrical protection

Protection against electric shock, indirect contact

The leakage current to ground exceeds 3.5 mA, and a

reinforced ground connection is required.

Protective conductors must always have a yellow/

green (PE) or yellow/green/blue (PEN) color marking.

Instructions according to EN IEC 61800-5-1:

• The CU331SP must be stationary, installed

permanently and connected permanently to the

mains supply.

• The ground connection must be carried out with

duplicate protective conductors or with a single

reinforced protective conductor with a cross-section

of minimum AWG 7 (10 mm2).

Protection against short-circuit, fuses

The CU331SP and the supply system must be

protected against short-circuit.

Grundfos requires that the back-up fuses are used for

protection against short-circuit.

The CU331SP offers complete short-circuit protection

in case of a short-circuit on the motor output.

Additional protection

The leakage current to ground exceeds 3.5 mA.

If the CU331SP is connected to an electrical

installation where an earth leakage circuit breaker

(ELCB) is used as additional protection, the circuit

breaker must be of a type marked with the following

symbols:

Fig. 31 Circuit breaker type B

The total leakage current of all the electrical equipment

in the installation must be taken into account.

During start and in asymmetrical supply systems, the

leakage current can be higher than normal and may

cause the ELCB to trip.

Motor protection

The motor requires no external motor protection. The

CU331SP protects the motor against thermal

overloading and blocking.

Protection against overcurrent

The CU331SP has an internal overcurrent protection

for overload protection on the motor output.

Protection against mains voltage transients

The CU331SP is protected against mains voltage

transients according to EN 61800-3, second

environment.

Mains and motor connection

The supply voltage and frequency are marked on the

CU331SP nameplate. Make sure that the CU331SP is

suitable for the power supply of the installation site.

The maximum output voltage of the CU331SP is equal

to the input.

Example: if the supply voltage is rated at 208V choose

a 208V motor for operation.

Mains switch

A mains switch can be installed before the CU331SP

according to local regulations. See fig. 32.

Wiring diagram

The wires in the terminal box must be as short as

possible. Excepted from this is the ground wire, which

must be so long that it is the last one to be

disconnected in case the cable is inadvertently pulled

out of the cable entry.

Fig. 32 CU331SP wiring diagram

For single-phase connection, use L1 and L2.

TM03 8860 2607

b

a

a

b

ELCB

TM05 5867 3912

Terminal Function

91 (L1) Single-phase supply

92 (L2)

95/99 (PE) Ground connection

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

46

Mains connection

Check that mains voltage and frequency correspond to

the values on the nameplate of the CU331SP and the

motor.

1. Connect the ground wire to terminal 95 (PE). See

fig. 33.

2. Connect the power leads to the terminals 91 (L1),

92 (L2).

3. Fix the mains cable with a cable clamp.

Fig. 33 Mains connection

CU331SP drive is usable with 3-phase input power by

connecting leads to 91 (L1), 92 (L2), and 93 (L3).

Motor connection

The motor cable must be screened for the CU331SP to

meet EMC requirements.

1. Connect the ground wire to terminal 99 (PE). See

fig. 34.

2. Connect the motor leads to the terminals 96 (U), 97

(V), 98 (W).

3. Fix the screened cable with a cable clamp.

Fig. 34 Motor connection

The cable screen must be exposed and in physical

contact with the mounting plate and clamp

11.1 Connecting the signal terminals

As a precaution, signal cables must be separated from

other groups by reinforced insulation in their entire

lengths.

If no external on/off switch is connected, short-circuit

terminals 18 and 20 using a short wire.

Connect the signal cables according to the guidelines

for good practice to ensure EMC-correct installation.

See section EMC-correct installation.

• Use screened signal cables with a conductor cross-

section of min. AWG 20 (0.5 mm2) and max. AWG

16 (1.5 mm2).

• Use a 3-conductor screened bus cable in new

systems.

Minimum connection, signal terminal

Operation is only possible when the terminals 18 and

20 are connected, for instance by means of an external

on/off switch or a short wire.

Fig. 35 Required minimum connection, signal terminal

TM03 9020 2807

TM03 9057 3207

Start/stop

GND

Jumper wire

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

47

Fig. 36 Wiring diagram for CU331SP

Fig. 37 Sensor wiring diagram

Setting the analog input 54

The contact A54 is positioned behind the control panel

and is used for setting the signal type of the analog

input.

The factory setting of the inputs is voltage signal "U".

This setting must be changed to "I" prior to starting the

CU331SP. Be sure the power supply is switched off.

Remove the control panel to set the contact. See

fig. 38.

Fig. 38 Setting contact A54 to current signal "I"

Terminal key

The RS-485 screen must be connected to frame.

Access to signal terminals

All signal terminals are behind the terminal cover of the

CU331SP front. Remove the terminal cover as shown

in fig. 39.

Fig. 39 Access to signal terminals

Fig. 40 Signal terminals

TM05 5802 3913

TM05 6776 5112TM05 5803 3912

0/4-20 mA

Terminals

Sensor 1

GND

GND

+24 V out

Start/stop

RS-485 GND Y

RS-485 B

RS-485 A

Switch position

must be

changed to "I"

prior to startup

Jumper wire

UI

A54

Terminal Type Function

12 +24 V out Supply to sensor

18 DI 1 Digital input, start/stop

20 GND Common frame for digital inputs

55 GND Common frame for analog inputs

54 AI 2 Sensor input, sensor 1, 0/4-20 mA

61 RS-485 GND Y GENIbus, frame

68 RS-485 A GENIbus, signal A (+)

69 RS-485 B GENIbus, signal B (-)

TM03 9004 2807

TM03 9025 2807

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

48

Fitting the conductor

1. Remove the insulation at a length of

0.35 to 0.40 inches (9 to 10 mm).

2. Insert a screwdriver with a tip of maximum

0.015 X 0.1 in (0.4 X 2.5 mm) into the square hole.

3. Insert the conductor into the corresponding round

hole. Remove the screwdriver. The conductor is

now fixed in the terminal.

Fig. 41 Fitting the conductor into the signal terminal

Connecting the signal relays

As a precaution, signal cables must be separated from

other groups by reinforced insulation in their entire

lengths.

Fig. 42 Terminals for signal relays (normal state, not

activated)

Signal relay

The signal relays on the CU331SP are predefined as

follows:

Relay 1: Pump running

Relay 2: Alarm

Fig. 43 Terminals for relay connection

TM03 9026 2807

TM03 8801 2507

Terminal Function

C 1 C 2 Common

NO 1 NO 2 Normally open contact

NC 1 NC 2 Normally closed contact

TM03 9008 2807

C 1

NC 1

NO 1

NC 2

NO 2

C2

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

49

EMC-correct installation

This section gives guidelines for good practice when

installing the CU331SP. Follow these guidelines to

meet EN 61800-3, first environment.

• Use only motor and signal cables with a braided

metal screen in applications without output filter.

• There are no special requirements to supply cables,

apart from local requirements.

• Leave the screen as close to the connecting

terminals as possible. See fig. 44.

• Avoid terminating the screen by twisting the ends.

See fig. 45. Use cable clamps or EMC screwed

cable entries instead.

• Connect the screen to frame at both ends for both

motor and signal cables. If the controller has no

cable clamps, connect only the screen to the

CU331SP.

• Avoid unscreened motor and signal cables in

electrical cabinets with variable frequency drives.

• Make the motor cable as short as possible in

applications without output filter to limit the noise

level and minimize leakage currents.

• Screws for frame connections must always be

tightened whether a cable is connected or not.

• Keep main cables, motor cables and signal cables

separated in the installation, if possible.

Other installation methods may give similar EMC

results if the above guidelines for good practice are

followed.

Fig. 44 Example of stripped cable with screen

Fig. 45 Do not twist the screen ends

Line disturbance and transient protection

To protect itself from AC line voltage disturbances, the

CU331SP monitors the input power supply and

interrupts drive operation in the event of phase loss or

imbalance. Transients on the AC line are suppressed

by MOVs as well as zener diodes for extreme

transients. The CU331SP meets VDE 0160 (European

standard - 2.3 x line voltage for 1.3 msec) for transient

protection.

RFI filters

To meet the EMC requirements, the CU331SP comes

with the following types of built-in radio frequency

interference filter (RFI).

*Single-phase input - three-phase output.

Description of RFI filter types

RFI filter types are according to EN61800-3

Control panel

The on/off button on the control panel does not

disconnect the CU331SP from the power supply and

must therefore not be used as a safety switch.

The control panel is used for local setting of the

CU331SP. The functions available are preset in the

CU331SP.

Fig. 46 Control panel of the CU331SP

Editing buttons

TM02 1325 0901TM03 8812 2507

Voltage Typical shaft power P2 RFI filter type

1 x 200-240 V * 1.5 - 10 hp C1

C1: For use in domestic areas.

The On/Off button has the highest priority.

In "Off" condition, pump operation is not

possible.

TM03 8719 2507

Button Function

Makes the pump ready for operation/starts and stops

the pump.

Saves changed values, resets alarms and expands the

value field.

Changes values in the value field.

On/On/

Off

+

-

CU

CUE

>

>

>

>

OK

On/

On/

Off

On

On

Off

Alarm

Alarm

On/

On/

Off

OK

+

-

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

50

Navigating buttons

Adjusting the display contrast

Press OK and + for darker display.

Press OK and - for brighter display.

Button lock

To lock the buttons on the panel press and hold the up

and down arrows simultaneously.

Indicator lights

The operating condition of the pump is indicated by the

indicator lights on the front of the control panel. See

fig. 46.

The table shows the function of the indicator lights.

Displays, general terms

Figures 47 and 48 show the general terms of the

display.

Fig. 47 Example of display in the start-up guide

Fig. 48 Example of display in the user menu

Warning and alarm list

1) In case of an alarm, the CU331SP will change the

operating mode depending on the pump type.

2) Warning is reset in display 3.20.

Button Function

Navigates from one menu to another. When the menu

is changed, the display shown will always be the top

display of the new menu.

Navigates up and down in the individual menu.

Indicator light Function

On (green)

The pump is running or has been stopped by a stop

function.

If flashing, the pump has been stopped by the user

(CU331SP menu), external start/stop or bus.

Off (orange) The pump has been stopped with the on/off button.

Alarm (red) Indicates an alarm or a warning.

>

>

>

>

Code and display text

Status

Operating

mode Resetting

Warning

Alarm

Locked alarm

1 Too high leakage current ●Stop Man.

2 Mains phase failure ●Stop Aut.

3 External fault ●Stop Man.

16 Other fault

● Stop Aut.

●Stop Man.

32 Overvoltage

●-Aut.

●Stop Aut.

40 Undervoltage

●-Aut.

●Stop Aut.

48 Overload

●Stop Aut.

●Stop Man.

49 Overload ●Stop Aut.

55 Overload

●-Aut.

●Stop Aut.

57 Dry running ●Stop Aut.

64 Too high CU331SP

temperature ●Stop Aut.

89 Sensor 1 outside range ●1) Aut.

96 Setpoint signal outside

range ●1) Aut.

155 Inrush fault ●Stop Aut.

241 Motor phase failure

●-Aut.

●Stop Aut.

Display name

Current display / total number

Value field

Display name

Display number, menu name

Value field

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

51

CU331SP technical data

Enclosure

All CU331SP enclosures are size B1.

The enclosure rating can be either IP 55 / TYPE 12 or

IP 66 / TYPE 4X.

Main dimensions and weight

Fig. 49 Enclosure B1

1) The dimensions are maximum height, width and depth.

Surroundings

The CU331SP comes in a packaging which is not

suitable for outdoor storage.

Terminal tightening torques

Cable length

Fuses and cable cross-section

Always comply with national and local regulations as to

cable cross-sections.

Cable cross-section to signal terminals

Non-UL fuses and conductor cross-

section to mains and motor

1) Screened motor cable, unscreened supply cable.

UL fuses and conductor cross-section to

mains and motor

1) Screened motor cable, unscreened supply cable.

Inputs and outputs

Mains supply (L1, L2)

Do not use the power supply for switching the

CU331SP on and off.

TM03 9002 2807

Enclo-

sure Height

[in] Width

[in] Depth

[in]

B1

AaBbC

18.9 17.9 9.5 8.3 10.2

Screw holes [in] Weight

[lbs]

cdef

0.47 0.75 0.35 0.35 50.7

Relative humidity 5-95 % RH

Ambient temperature Max. 122 °F

(50 °C)

Average ambient temperature over 24 hours Max. 113 °F

(45 °C)

Minimum ambient temperature at full operation 32 °F (0 °C)

Minimum ambient temperature at reduced

operation 14 °F (-10 °C)

Temperature during storage and transportation -13 to 150 °F

(-25 to 65 °C)

Storage duration Max. 6 months

Maximum altitude above sea level without

performance reduction 3280 ft (1000 m)

Maximum altitude above sea level with

performance reduction 9840 ft (3000 m)

Enclosure Tightening torque [ft-lb]

Mains Motor Earth Relay

B1 1.3 1.3 2.2 0.4

Maximum length, screened motor cable 500 ft (152 m)

Maximum length, unscreened motor cable 1000 ft (305 m)

Maximum length, signal cable 1000 ft (305 m)

Maximum cable cross-section to signal terminals,

rigid conductor AWG 14

Maximum cable cross-section to signal terminals,

flexible conductor AWG 18

Minimum cable cross-section to signal terminals AWG 20

Typical shaft

power P2

[Hp]

Maximum

fuse size

[A]

Fuse

type

Maximum conductor

cross section1

[AWG] [mm2]

240gG710

340gG710

580gG710

Typical shaft

power P2

[Hp]

Maximum

fuse size

[A]

Bussmann

RK1

Maximum

conductor

cross section1

[AWG}

240KTN-R407

340KTN-R407

580KTN-R807

Supply voltage 200-240 V ± 10 %

Supply frequency 60 Hz

Maximum temporary imbalance

between phases 3 % of rated value

Leakage current to earth > 3.5 mA

Number of cut-ins Max. 1 time/min.

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

52

Motor output (U, V, W)

1) Output voltage in % of supply voltage.

RS-485 GENIbus connection

The RS-485 circuit is functionally separated from other

central circuits and galvanically separated from the

supply voltage (PELV).

Digital inputs

All digital inputs are galvanically separated from the

supply voltage (PELV) and other high-voltage

terminals.

Signal relays

1) IEC 60947, parts 4 and 5.

The relay contacts are galvanically separated from

other circuits by reinforced insulation (PELV).

Analog input

1) The factory setting is voltage signal "U".

All analog inputs are galvanically separated from the

supply voltage (PELV) and other high-voltage

terminals.

Sound pressure level

The sound pressure of the CU331SP is maximum 70

dB(A).

The sound pressure level of a motor controlled by a

Variable frequency drive may be higher than that of a

corresponding motor which is not controlled by a

variable frequency drive.

Output voltage 0-100 % 1)

Output frequency 0-60 Hz

Switching on output Not recommended

Terminal number 68 (A), 69 (B), 61 GND (Y)

Terminal number 18

Voltage level 0-24 VDC

Voltage level, open contact > 19 VDC

Voltage level, closed contact < 14 VDC

Maximum voltage on input 28 VDC

Input resistance, RiApprox. 4 kΩ

Relay 01, terminal number 1 (C), 2 (NO), 3 (NC)

Relay 02, terminal number 4 (C), 5 (NO), 6 (NC)

Maximum terminal load (AC-1) 1) 240 VAC, 2 A

Maximum terminal load (AC-15) 1) 240 VAC, 0.2 A

Maximum terminal load (DC-1) 1) 50 VDC, 1 A

Minimum terminal load 24 V DC 10 mA

24 V AC 20 mA

CCommon

NO Normally open

NC Normally closed

Terminal number 54

Current signal A54 = "I" 1)

Current range 0-20, 4-20 mA

Input resistance, RiApprox. 200 Ω

Maximum current 30 mA

Maximum fault, terminals 53, 54 0.5 % of full scale

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

53

CU331SP curve charts

TM05 6410 5012

TM05 6412 5012

0 1 2 3 4 5 6 7

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

1050

[ft]

H

0.0 0.5 1.0 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

[m]

H

5S20-39ds

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 2 4 6 8 10 12 14

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

[ft]

H

0 1 2 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

[m]

H

10S20-27

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6411 5012

TM05 6413 5012

0 1 2 3 4 5 6 7 8 9 10

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

[ft]

H

0.0 0.5 1.0 1.5 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

[m]

H

7S20-32

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 2 4 6 8 10 12 14 16 18 20 22

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

[ft]

H

0 1 2 3 Q [m³/h]

0

20

40

60

80

100

120

140

160

[m]

H

16S20-18

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

54

TM05 6414 5012

TM05 6416 5012

0 4 8 12 16 20 24 28 32 36

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340

[ft]

H

0 2 4 6 Q [m³/h]

0

10

20

30

40

50

60

70

80

90

100

[m]

H

25S20-11

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 10 20 30 40 50 60 70 80 90

Q [US GPM]

0

10

20

30

40

50

60

70

80

90

100

110

120

130

[ft]

H

0 5 10 15 Q [m³/h]

0

5

10

15

20

25

30

35

40

[m]

H

60S20-4

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6415 5012

TM05 6417 5012

0 5 10 15 20 25 30 35 40 45 50 55 60

Q [US GPM]

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190

200

[ft]

H

0 2 4 6 8 10 Q [m³/h]

0

5

10

15

20

25

30

35

40

45

50

55

60

[m]

H

40S20-7

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 10 20 30 40 50 60 70 80 90 100

Q [US GPM]

0

10

20

30

40

50

60

70

80

90

100

[ft]

H

0 5 10 15 Q [m³/h]

0

5

10

15

20

25

30

[m]

H

75S20-3

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

55

TM05 6418 5012

TM05 6420 5012

0 1 2 3 4 5 6 7

Q [US GPM]

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

[ft]

H

0.0 0.5 1.0 Q [m³/h]

0

50

100

150

200

250

300

350

400

[m]

H

5S30-48ds

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 2 4 6 8 10 12 14 16 18 20 22

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

[ft]

H

0 1 2 3 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

[m]

H

16S30-24

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6419 5012

TM05 6421 5012

0 2 4 6 8 10 12 14

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

[ft]

H

0 1 2 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

[m]

H

10S30-34

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 4 8 12 16 20 24 28 32 36

Q [US GPM]

0

40

80

120

160

200

240

280

320

360

400

440

480

[ft]

H

0 2 4 6 Q [m³/h]

0

20

40

60

80

100

120

140

[m]

H

25S30-15

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

56

TM05 6422 5012

TM05 6424 5012

0 5 10 15 20 25 30 35 40 45 50 55 60

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

[ft]

H

0 2 4 6 8 10 Q [m³/h]

0

10

20

30

40

50

60

70

80

[m]

H

40S30-9

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 10 20 30 40 50 60 70 80 90 100

Q [US GPM]

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

[ft]

H

0 5 10 15 Q [m³/h]

0

5

10

15

20

25

30

35

40

45

50

[m]

H

75S30-5

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6423 5012TM05 6425 5012

0 10 20 30 40 50 60 70 80 90

Q [US GPM]

0

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160

170

[ft]

H

0 5 10 15 Q [m³/h]

0

5

10

15

20

25

30

35

40

45

50

[m]

H

60S30-5

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 2 4 6 8 10 12 14

Q [US GPM]

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

[ft]

H

0 1 2 Q [m³/h]

0

50

100

150

200

250

300

350

400

[m]

H

10S50-48ds

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP 11

57

TM05 6426 5012TM05 6428 5012

0 2 4 6 8 10 12 14

Q [US GPM]

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

[ft]

H

0 1 2 Q [m³/h]

0

50

100

150

200

250

300

350

400

450

500

[m]

H

10S50-58

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 4 8 12 16 20 24 28 32 36

Q [US GPM]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

800

[ft]

H

0 2 4 6 Q [m³/h]

0

20

40

60

80

100

120

140

160

180

200

220

240

[m]

H

25S50-26

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6427 5012TM05 6429 5012

0 2 4 6 8 10 12 14 16 18 20 22

Q [US GPM]

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

[ft]

H

0 1 2 3 Q [m³/h]

0

50

100

150

200

250

300

350

[m]

H

16S50-38

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 5 10 15 20 25 30 35 40 45 50 55 60

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340

360

[ft]

H

0 2 4 6 8 10 Q [m³/h]

0

10

20

30

40

50

60

70

80

90

100

110

[m]

H

40S50-12

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

CU331SP variable frequency drive

SQ, SQE, SQE-NE,

CU331SP

11

58

TM05 6430 5012

TM05 6432 5012

0 5 10 15 20 25 30 35 40 45 50 55 60

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340

360

380

400

420

440

[ft]

H

0 2 4 6 8 10 Q [m³/h]

0

10

20

30

40

50

60

70

80

90

100

110

120

130

[m]

H

40S50-15

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 10 20 30 40 50 60 70 80 90

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

[ft]

H

0 5 10 15 Q [m³/h]

0

10

20

30

40

50

60

70

80

90

[m]

H

60S50-9

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

TM05 6431 5012

TM05 6433 5012

0 10 20 30 40 50 60 70 80 90

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

[ft]

H

0 5 10 15 Q [m³/h]

0

10

20

30

40

50

60

70

[m]

H

60S50-7

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

0 10 20 30 40 50 60 70 80 90 100

Q [US GPM]

0

20

40

60

80

100

120

140

160

180

200

220

240

260

[ft]

H

0 5 10 15 Q [m³/h]

0

10

20

30

40

50

60

70

80

[m]

H

75S50-8

60 Hz

30 Hz

35 Hz

40 Hz

45 Hz

50 Hz

55 Hz

Accessories

SQ, SQE, SQE-NE,

CU331SP 12

59

12. Accessories

CU331SP Constant Pressure

Drive Kits (with sensor)

CU 301 Constant Pressure System

CU 300 Status Box & R100

SQ, SQE flow sleeves

TM05 5801 4012

Enclosure type NEMA Hp Input Ph Input volts Product number Approx.

ship wt.

[lbs]

Indoor Type 12

2 1 200 - 240 98370277 60

3 1 200 - 240 98370280 60

5 1 200 - 240 98370304 60

Outdoor Type 4X

2 1 200 - 240 98370279 60

3 1 200 - 240 98370301 60

5 1 200 - 240 98370305 60

TM04 7509 2110

Description Product number

Constant Pressure Kit (CU 301 and Transducer) 96438895

TM04 7508 2110

Description Product number

CU300 Status Box 96422776

Description Product number

R100 (for wireless infrared communication with the

CU 301 / CU 300) 96615297

TM01 3292 3798

Description Product number

SQ, SQE flow sleeve, complete 98148594

55050

88

650 100

50210

250

max. ø100

ø90

Further product documentation

SQ, SQE, SQE-NE,

CU331SP

13

60

13. Further product documentation

WebCAPS WebCAPS is a Web-based Computer Aided Product

Selection program available on www.grundfos.com.

WebCAPS contains detailed information on more than

185,000 Grundfos products in more than 20

languages.

In WebCAPS, all information is divided into 6 sections:

• Catalog

• Literature

• Service

• Sizing

• Replacement

• CAD drawings.

Catalog

This section is based on fields of application and pump types,

and contains

• technical data

• curves (QH, Eta, P1, P2, etc) which can be adapted to the

density and viscosity of the pumped liquid and show the

number of pumps in operation

• product photos

• dimensional drawings

• wiring diagrams

• quotation texts, etc.

Literature

In this section you can access all the latest documents of a given

pump, such as

• product guides

• installation and operating instructions

• service documentation, such as Service kit catalog

and Service kit instructions

• quick guides

• product brochures, etc.

Service

This section contains an easy-to-use interactive service catalog.

Here you can find and identify service parts of both existing and

discontinued Grundfos pumps.

Furthermore, this section contains service videos showing you

how to replace service parts.

Further product documentation

SQ, SQE, SQE-NE,

CU331SP 13

61

WinCAPS

Fig. 50 WinCAPS CD-ROM

WinCAPS is a Windows-based Computer Aided

Product Selection program containing detailed

information on more than 185,000 Grundfos products

in more than 20 languages.

The program contains the same features and functions

as WebCAPS, but is an ideal solution if no Internet

connection is available.

WinCAPS is available on CD-ROM and updated once

a year.

Sizing

This section is based on different fields of application and

installation examples, and gives easy step-by-step instructions in

how to

• select the most suitable and efficient pump for your installation

• carry out advanced calculations based on energy

consumption, payback periods, load profiles, life cycle costs,

etc.

• analyse your selected pump via the built-in life cycle cost tool

• determine the flow velocity in wastewater applications, etc.

Replacement

In this section you find a guide to selecting and comparing

replacement data of an installed pump in order to replace the

pump with a more efficient Grundfos pump.

The section contains replacement data of a wide range of pumps

produced by other manufacturers than Grundfos.

Based on an easy step-by-step guide, you can compare

Grundfos pumps with the one you have installed on your site.

When you have specified the installed pump, the guide will

suggest a number of Grundfos pumps which can improve both

comfort and efficiency.

CAD drawings

In this section it is possible to download 2-dimensional (2D) and

3-dimensional (3D) CAD drawings of most Grundfos pumps.

These formats are available in WebCAPS:

2-dimensional drawings:

• .dxf, wireframe drawings

• .dwg, wireframe drawings.

3-dimensional drawings:

• .dwg, wireframe drawings (without surfaces)

• .stp, solid drawings (with surfaces)

• .eprt, E-drawings.

01

62

63

The name Grundfos, the Grundfos logo, and be think innovate are registered trademarks owned by Grundfos Holding A/S or Grundfos A/S, Denmark. All rights reserved worldwide. © Copyright Grundfos Holding A/S

L-SQ-PG-001

98440904 0313

ECM: -

GRUNDFOS Pumps Corporation

17100 West 118th Terrace

Olathe, Kansas 66061

Phone: +1-913-227-3400

Telefax: +1-913-227-3500

GRUNDFOS Canada Inc.

2941 Brighton Road

Oakville, Ontario L6H 6C9

Canada

Phone: +1-905 829 9533

Telefax: +1-905 829 9512

Bombas GRUNDFOS de Mexico S.A. de C.V.

Boulevard TLC No. 15

Parque Industrial Stiva Aeropuerto

Apodaca, N.L. Mexico 66600

Phone: +52-81-8144 4000

Telefax: +52-81-8144 4010