Grundfos SQFlex Pumps Product Guide ( Text Only)

GRUNDFOS PRODUCT GUIDE

SQFlex

Renewable-energy based

water supply systems

50/60 Hz

= Page 1 =

Table of contents

2

SQFlex

1. Product data 3

Introduction 3

Applications 5

Features and benefits 5

Performance range 7

System overview 8

Identification 9

2. Construction 10

Material specification,

helical rotor pump 10

Material specification,

centrifugal pump 11

Material specification,

motor 12

3. Selection 13

Sizing of SQFlex system 13

Application examples 14

4. Solar panel wiring 23

Methods of solar panel wiring 23

5. Performance curves 25

Curve conditions 25

Curve charts 26

6. Technical data 32

Dimensions and weights 32

SQF pump 33

Motor 33

CU 200 SQFlex control unit 34

IO 50 SQFlex switch box 34

IO 101 SQFlex switch box 34

IO 102 SQFlex breaker box 34

Charge controller 34

7. Accessories 35

CU 200 SQFlex control unit 35

IO 50 SQFlex switch box 37

IO 101 SQFlex switch box 37

IO 102 SQFlex breaker box 37

Charge controller 38

Submersible drop cables 38

Whisper 200 wind turbine 39

GF100 solar panel 41

8. Further product documentation 42

WebCAPS 42

WinCAPS 43

= Page 2 =

Product data

SQFlex 1

3

1. Product data

Introduction

The SQFlex system is a reliable water supply system

based on renewable energy sources, such as solar

and wind energy. The SQFlex system incorporates an

SQF submersible pump.

Very flexible as to its energy supply and performance,

the SQFlex system can be combined and adapted to

any need according to the conditions on the installation

site.

The system components are

• SQF submersible pump

• CU 200 SQFlex control unit

• IO 50 SQFlex switch box

• IO 101 SQFlex switch box

• IO 102 SQFlex breaker box

• charge controller

• energy supply:

– solar panels

– wind turbine

– generator

– batteries.

SQF submersible pump

The SQF pump range comprises two pump

technologies:

• the helical rotor pump (3") for high heads and small

flows.

• the centrifugal pump (4") for low heads and large

flows.

The performance curves in fig. 1 illustrates the pump

performance for the two pump models.

Fig. 1 Performance ranges for helical rotor and

centrifugal pumps

The SQF pump is available as a complete unit only.

The SQF pump complete comprises:

• motor

• 6 ft (1.8 m) cable with water level electrode and

socket

• cable guard.

Fig. 2 SQF pump

Currently the complete range consists of six centrifugal

pumps and five helical rotor pumps. The centrifugal

pumps are adapted from Grundfos’ present 4” SP

range (16S, 25S, 40S, and 60S). These pumps are

used when lower heads and higher flow rates are

required.

The positive displacement helical pump ends are

3” in diameter and available in five models ranging

from 3 to 11 gpm (0.68 to 2.50 m 3/h). These are

designed for higher head and lower flow requirements.

The pump rotor is a single-twisted helix (spiral) made

of hard-chromium plated stainless steel. During

operation, the rotor rotates eccentrically in a double

helical elastic stator.

TM02 2425 3901 Q

H

A

B

A: Helical rotor pump

B: Centrifugal pump

/day

TM02 2217 3901

Pump type Pump size Product number

3 SQF 2 3" 95027332

3 SQF 3 3" 95027333

6 SQF 2 3" 95027334

6 SFQ 3 3” 96834840

11 SQF 2 3" 95027335

16 SQF 10 4" 95027350

25 SQF 3 4" 95027351

25 SQF 7 4" 95027353

40 SQF 3 4" 95027354

40 SQF 5 4" 95027355

60 SQF 3 4" 95027443

= Page 3 =

Product data

SQFlex 1

4

Motor

The motor has been developed specifically for the

SQFlex system and is de signed according to the

permanent-magnet principle with built-in electronic unit

and is available in only two sizes.

The motor speed range is 500-3600 rpm, depending

on power input and load.

The motor is constructed in 304 stainless steel.

Max. ratings are as follows:

• Maximum power input (P 1) of 1400 W

• maximum current of 8.4 A

• maximum speed of 3600 rpm

The pump delivers its maximum performance when

one of the above parameters is reached.

Fig. 3 Wiring diagram

The motor is to be connected to the power supply as

shown in fig. 3.

As the integrated electronic unit enables the motor to

handle both DC and AC supply voltages, it makes no

difference how the wires "+" and "–" or "N" and "L" are

connected.

Supply voltage

Flexible as regards power supply and power range, the

motor can be supplied with either DC or AC voltage:

• 30-300 VDC, PE

• 1 x 90-240 V –10 % / +6 %, 50/60 Hz, PE.

CU 200 SQFlex control unit

The CU 200 is a combined status and control unit for

the SQFlex pump system. Moreover, the CU 200

enables connection of a level switch placed in a water

reservoir or tank.

IO 50 SQFlex switch box

The IO 50 is an on/off switch box designed for opening

and closing the system power supply.

IO 101 SQFlex switch box

The IO 101 is an on/off switch box designed for

opening and closing the syst em power supply and is

used in solar-powered SQFl ex systems with a back-up

generator.

IO 102 SQFlex breaker box

The IO 102 is an on/off breaker box designed for

opening and closing the syst em power supply and is

used in wind-powered SQFlex systems or wind- and

solar-powered SQFlex systems.

The IO 102 makes it possible to slow down or stop the

wind turbine.

Charge controller

The charge controller is used when a battery backup

system is installed with an SQFlex pumping system.

Solar modules

Grundfos’ solar modules have been developed

specifically for the SQFlex system. The solar modules

are equipped with plugs and sockets enabling easy

connection in series or parallel.

For further information on solar modules, please

contact your local Grundfos company.

Generator

In case the power supply from its primary source of

energy is temporarily insufficient or unavailable, the

SQFlex system can be pow ered by a generator.

Batteries

The SQFlex system can be powered by batteries with

a voltage supply of 30-300 VDC, maximum current

8.4 A.

TM02 2437 3901

NL

30-300 VDC 1 x 90-240 VDC

= Page 4 =

Product data

SQFlex 1

5

Applications

Being designed for continuous as well as intermittent

operation, the SQFlex system is especially suitable for

water supply applications in remote locations, such as

• villages, schools, hospitals, single-family houses,

etc.

• farms

– watering of cattle

– irrigation of fields and greenhouses

• game parks and game farms

– watering applications

• conservation areas

– surface water pumping

– floating pump installations for pumping of water

from ponds and lakes.

Pumped liquids

SQF pumps are applicable in thin, clean,

non-aggressive, non-explosive liquids, not containing

solid or long-fibered particles larger than sand grains.

pH value: 5 to 9.

Liquid temperature: +32 °F to +104 °F (0 °C to +40 °C)

The pump can run at free convection (~ 0 ft/s) at

maximum 104 °F (+40 °C).

Sand content

Maximum sand content: 50 ppm.

A higher sand content will reduce the pump life

considerably due to wear.

Salt content (chloride ions CI -)

The table below shows the resistance of stainless steel

to Cl-. The figures in the table are based on a pumped

liquid with a pH value of 5 to 9.

Features and benefits

Dry-running protection

The SQF pump is protected against dry running in

order to prevent damage to the pump. The dry-running

protection is activated by a water level electrode

placed on the motor cable 12-24 in. (.3 to .6 m) above

the pump, depending on pump type.

The water level electrode measures the contact

resistance to the motor sleeve through the water.

When the water level falls below the water level

electrode, the pump will be cut out. The pump will

automatically cut in again 5 minutes after the water

level is above the water level electrode.

Fig. 4 Vertical installation

Fig. 5 Horizontal installation

High efficiency

The MSF 3 motor is a permanent-magnet motor

(PM motor) featuring a high er efficiency within the

power range compared to a conventional

asynchronous motor.

In addition to this, the segmented motor stator

contributes considerably to the high efficiency.

The MSF 3 motor is furthe rmore characterized by a

high locked-rotor torque even at low power supply.

Stainless steel

AISI

Cl- content

[ppm]

Liquid temperature

[°F (°C)]

304 0-300 < 104 (40)

300-500 < 86 (30)

TM02 2436 3901TM02 2435 3901

12-24 in. (.3 to .6 m)

12-24 in. (.3 to .6 m)

= Page 5 =

Product data

SQFlex 1

6

Overvoltage and undervoltage protection

Overvoltage and undervoltage may occur in case of

unstable power supply or a faulty installation.

The pump will be cut out if the voltage falls outside the

permissible voltage range. The motor is automatically

cut in when the voltage is again within the permissible

voltage range. Therefore no extra protection relay is

needed.

Note: The MSF 3 motor is protected against transients

from the power supply according to IEC 60664-1

"overvoltage category III" (4 kV). In areas with high

lightning intensity, exter nal lightning protection is

recommended.

Overload protection

In case the upper load limit is exceeded, the motor will

automatically compensate fo r this by reducing the

speed. If the speed falls below 500 rpm, the motor will

be cut out automatically.

The motor will remain cut out for 10 seconds after

which period the pump will automatically attempt to

restart.

The overload protection preven ts burnout of the motor.

Consequently, no extra motor protection is required.

Overtemperature protection

A permanent-magnet motor gives off very little heat to

its surroundings. In combination with an efficient

internal circulation system l eading the heat away from

the rotor, stator and bearings, this fact ensures

optimum operating conditions for the motor.

As an extra protection, the electronic unit has a

built-in temperatur e sensor. When the temperature

rises above 185 °F (85°C), the motor is automatically

cut out. When the temperature has dropped to

165 °F (73 °C), the motor is automatically cut in again.

Maximum Power Point Tracking (MPPT)

The built-in electronic unit gives the SQFlex system a

number of advantages compared to conventional

products. One of these advantages is the built-in

microprocessor with MPPT (MPPT = Maximum Power

Point Tracking).

Thanks to the MPPT-functi on, the pump duty point is

continuously optimized according to the input power

available. MPPT is only available for pumps connected

to DC supply.

Wide voltage range

The wide voltage range enables the motor to operate

at any voltage from 30-300 VDC or 90-240 VAC. This

makes installation and sizing especially easy.

Built-in sand shield

The built-in sand shield prevents sand damage to the

pump and motor by slinging it out through the oval

slots located at the base of the pump end.

Reliability

The MSF 3 motor has been developed with a view to

high reliability achieved through the following features:

• carbon/ceramic bearings

• excellent starting capabilities

• various protection facilities.

Simple installation

The following features ensure simple installation of

the SQF pump:

• low weight ensuring user-friendly handling

• installation in 3", 4" or larger boreholes

• only an on/off switch is needed, which means that

no extra motor starter / starter box is necessary.

Note: Horizontal installation requires the water level

electrode to be placed above the pump to ensure the

dry-running protection.

Fig. 6 Installation of SQF pumps

Fig. 7 Horizontal installation

Ease of service

The modular pump and motor design facilitates

installation and service. The cable and the end cover

with socket are fitted to the pump with screws which

enable replacement.

TM02 2246 3901TM02 2435 3901

Allowed

Not allowed

12-24 in. (.3 to .6 m)

= Page 6 =

Product data

SQFlex 1

7

Performance range

Note: The curves must not be used as guarantee curves.

TM02 2433 4311

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000Q [US GPD]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

[ft]

H

0

20

40

60

80

100

120

140

160

180

[m]

H

SQFlex Solar

A B C D E

E 1400 Wp

D 800 Wp

C 400 Wp

B 200 Wp

A 100 Wp

0 10 20 30 40 50 60 70 Q [m³/day]

0

100

200

300

400

500

600

TM02 2434 4311

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000Q [US GPD]

0

50

100

150

200

250

300

350

400

450

500

550

600

650

700

750

[ft]

H

0

20

40

60

80

100

120

140

160

180

200

220

[m]

H

SQFlex Wind

A B C D

D 18 mph

C 15 mph

B 13 mph

A 11 mph

0 10 20 30 40 50 60 70 Q [m³/day]

0

100

200

300

400

500

600

700

= Page 7 =

Product data

SQFlex 1

8

System overview

The SQFlex system can be used in a number of combinations as shown in the table below.

ï‚« For number of solar modules required, please c onsult the sizing tool in Grundfos WinCAPS/WebCAPS.

ï‚«ï‚« Optional.

System consists of the following components

Pump Solar

panels ï‚«

Wind

turbine

Generator/

battery/

power supply

Charge

controller

Switch box or

breaker box

Control

unit

Additional

extras

SQFlex Solar

See page 14.

IO 50

SQFlex Solar

- with CU 200 and level

switch

See page 15.

IO 50

CU 200 (ï‚«ï‚«)

SQFlex Solar

- with back-up generator

See page 16.

IO 101

SQFlex Solar

- with back-up batteries

See page 17.

CU 200

SQFlex Wind

See page 18.

IO 102

SQFlex Wind

- with CU 200 and level

switch

See page 19. IO 102 CU 200 (ï‚«ï‚«)

SQFlex Combo

- combination of solar and

wind energy

See page 20. IO 102

SQFlex Combo

- with CU 200 and level

switch

See page 21. IO 102 CU 200 (ï‚«ï‚«)

SQFlex system

- with generator as power

supply

See page 22. IO 101

IO 50 or

IO 101

(ï‚«ï‚«)

Pressure

tank

Pressure

switch

= Page 8 =

Product data

SQFlex 1

9

Identification

Type key for helical rotor pumps

Type key for centrifugal pumps

Example 6 SQF -2

Rated flow at 3000 rpm [gpm]

Type range

Number of stages

Example 25 SQF -3

Rated flow of corresponding SP pump [gpm]

Type range

Number of stages

= Page 9 =

Construction

SQFlex 2

10

2. Construction

Material specification,

helical rotor pump

Pos. Component Material

SQF

TM02 2213 0207

AISI

1 Valve casing Polyamide

1a Discharge chamber Stainless steel 304

1d O-ring NBR

2 Valve cup Polyamide

3 Valve seat NBR

6 Flange, upper Stainless steel 304

7a Circlip Stainless spring steel 310

9 Pump stator Stainless steel/EPDM 304

13 Pump rotor Stainless steel 304

16 Torsion shaft Stainless steel 316

39 Valve spring Stainless spring steel 316 LN

55 Outer sleeve Stainless steel 304

70 Valve guide Polyamide

159c Sand shield Polyamide

Cable guard Stainless steel 304

Screws for cable guard Stainless steel 316

Fig. 8 Example: 6 SQF-2

= Page 10 =

Construction

SQFlex 2

11

Material specification,

centrifugal pump

Pos. Component Material

SQF

TM02 2439 4301

AISI

1 Valve casing Stainless steel 304

4 Chamber, top Stainless steel 304

6 Top bearing NBR

7 Neck ring NBR/PPS

8 Bearing NBR

9 Chamber, complete Stainless steel 304

11 Nut for split cone Stainless steel 304

12 Split cone Stainless steel 304

13 Impeller Stainless steel 304

14 Inlet part Stainless steel 304

14a Connecting piece, complete (MSF 3 adapter) Stainless steel 304

15 Strainer Stainless steel 304

16 Shaft, cylindrical Stainless steel 431

17 Strap Stainless steel 304

18 Cable guard, pump Stainless steel 304

18c Cable guard, motor Stainless steel 304

19 Nut for strap Stainless steel 304

19a Nut Stainless steel 316

24 Coupling with nut Stainless steel 329

24a Supporting ring Stainless steel 316

24b Spline protector NBR

25 Retainer for neck ring, complete Stainless steel 304

85 Stop ring (only 25 SQF and 60 SQF) Carbon/graphite PTFE

Screws for cable guard Stainless steel 316

Fig. 9 Example: 60 SQF-3

11

12

14

85

17

19

15

16

1

8

9

4

6

13

7

7 25

18

7

9

8

12

14a

19a 24b

24a

24

18c

= Page 11 =

Construction

SQFlex 2

12

Material specification,

motor

Pos. Component Material

MSF 3

TM02 2215 1806

AISI

201 Stator with sleeve, complete Stainless steel 304

202 Rotor Stainless steel 304

202a Stop ring PP

202c Shaft end Stainless steel 316

203 Thrust bearing, stationary Stainless steel/carbon 316

205 Bearing plate with radial bearing Silicon carbide 304

206 Thrust bearing, rotating Stainless steel/aluminium oxide Al 2O3 316

220 Motor cable with plug

222a Filling plug NBR

223 Electronic unit

224 O-ring NBR

225 Top cover NBR

232 Shaft seal NBR

243 Thrust-bearing housing Stainless steel 316

Four screws (M4) Stainless steel 316

Fig. 10 MSF 3

= Page 12 =

Selection

SQFlex 3

13

3. Selection

Sizing of SQFlex system

Grundfos has developed a PC-based sizing tool

enabling the sizing of SQFlex systems.

The sizing tool is integr ated in Grundfos WinCAPS and

covers both solar- and wi nd-powered systems. Visit

Grundfos.com to use WebC APS, our online version of

WinCAPS.

The following three parameters must be known for the

sizing of the optimum SQFlex system:

• installation location

• maximum head required

• quantity of water required.

With a view to the sizing of a correct solar-powered

SQFlex system, the world has been divided into six

regions:

• North America

• South America

• Australia/New Zealand

• Asia/Pacific

• Southern Africa

• Europe/Middle East/Northern Africa.

Each region is divided into a number of zones

according to the solar radiation in kWh/m 2 per day.

Voltage effect on pump efficiency

The pump efficiency can vary quite a bit depending on

input voltage. This chart shows the dropoff in efficiency

as the voltage gets lower. For example, if you have two

systems with the exact same wattage rating, but

System A is running at 120V and System B is running

at 35V, System A will produce 20 % more water than

System B.

SQ Flex optimal efficiency

Panel output voltage (% loss in gallons/day)

120V - 300V - 0 %

90V - 5 %

60V - 10 %

35V - 20 %

= Page 13 =

Selection

SQFlex 3

14

Application examples

SQFlex Solar

The SQFlex Solar system is the simplest of the range

of SQFlex systems.

Benefits

• Easy to install

• Maintenance confined to periodic cleaning of

the solar panels

• Few and simple components.

The protective circuit incorporated in the motor

electronic unit cuts out the pump in case of dry running

or similar situations.

By using the IO 50, the power supply to the pump can

be closed manually, for example when

• there is no need for water supply

• the system requires service.

Fig. 11 SQFlex Solar

2

3

4

5

1

6

7

12

5

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

12 IO 50 SQFlex switch box

Note: For the number of solar modules required,

please consult the sizing tool in Grundfos WinCAPS.

= Page 14 =

Selection

SQFlex 3

15

SQFlex Solar

- with CU 200 and level switch

The SQFlex Solar system al lows solar energy to be

stored as water in a reservoir.

SQFlex Solar water supply systems with a water

reservoir are used where

• there is a need for water supply at night

• for short periods, the solar energy is insufficient to

run the pump

• there is a need for a back-up water source.

Benefits

Combined with the CU 200, the level switch acts as a

pump cut-out function when the water reservoir is full.

The CU 200 offers indication of

• full water reservoir (level switch activated)

• pump operation

• input power.

The CU 200 indicates operational stoppage in case of

• dry running

• service (see page 35)

• insufficient energy supply.

In addition, the system features

• easy installation

• maintenance confined to periodic cleaning of

the solar panels.

Fig. 12 SQFlex Solar with CU 200 and level switch

TM02 2305 4101

2

3

4

5

1

6

7

11

14

5

15

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

11 CU 200 SQFlex control unit

14 Water reservoir

15 Level switch

Note: For the number of solar modules required,

please consult the sizing tool in Grundfos WinCAPS.

= Page 15 =

Selection

SQFlex 3

16

SQFlex Solar

- with back-up generator

During periods of limited solar energy, the SQFlex

Solar water supply system provides reliable water

supply. The system is connected to an external

back-up generator via the IO 101.

The system switches aut omatically to operation

• via generator when

– the energy supply from the solar panels

is insufficient

• via solar panels when

– the generator is stopped manually or

– the generator runs out of fuel.

Benefits

The system offers water supply during the night or

during periods of insufficient solar energy.

Other benefits of the system include

• easy to install

• maintenance confined to periodic cleaning of

the solar panels

• few and simple components

• flexible in terms of energy supply.

Fig. 13 SQFlex Solar with back-up generator

TM02 2309 4101

2

3

4

5

1

6 7

13

5

10

Note: For the number of solar modules required,

please consult the sizing to ol in Grundfos WinCAPS.

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

10 Diesel or gasoline driven generator

13 IO 101 SQFlex switch box

= Page 16 =

Selection

SQFlex 3

17

SQFlex Solar

- with back-up batteries

During periods of limited solar energy, the SQFlex

Solar system provides reliable water supply.

The supply of water is ensured by back-up batteries

connected to the system vi a the charge controller.

The system is connected as shown in fig. 14.

• Power will be provided by the solar panels wired to

produce 48-110 VDC (rated).

• Power from the solar panels will feed into a 48 VDC

charge controller, which will regulate the current fed

to the batteries.

• From the charge controller, power passes into the

battery bank, which consists of the number of

appropriately sized batteries, wired in series to

achieve 48 VDC (rated) output.

• Power is drawn from the battery bank and routed

through a CU 200.

Option: An IO 50 or IO 101 is to be installed to

enable disconnection of the DC voltage.

If an IO 101 is installed, it is possible to add a

generator to the system.

• Power is run from the CU 200 to the SQFlex pump.

Benefits

The system offers water supply during the night or

during periods of insufficient solar energy.

Other benefits of the system include

• easy installation

• a minimum of maintenance

• few and simple components

• flexibility in terms of energy supply.

Fig. 14 SQFlex Solar with back-up batteries

TM03 4232 1906

kWatt kWatt

16

17

11 12

6

19

1

4

5

18

7

3

2

Note: For the number of solar modules required,

please consult the sizing tool in Grundfos

WinCAPS.

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

11 CU 200 SQFlex control unit

12 IO 101 SQFlex switch box

(optional)

16 Charge controller

17 Batteries

18 Pressure switch

19 Pressure tank

= Page 17 =

Selection

SQFlex 3

18

SQFlex Wind

The SQFlex Wind system is based on wind energy as

the only energy source for pump operation.

The system is suitable for installation in areas where

the wind is almost constant seen over a period of time.

As the turbine noise level increases with the wind

speed, installation of the wind turbine near a residence

is not recommended.

The IO 102 makes it possible to slow down the wind

turbine when

• there is no need for water supply

• the system requires service.

Benefits

• Easy to install

• A minimum of maintenance

• Few and simple components

Fig. 15 SQ FlexWind

Proper siting for wind turbines

For proper wind siting you must locate your Whisper

wind turbine 20 ft (6 m) above any surrounding object

within a 250 ft (76 m) (radius as shown in fig. 16.

Fig. 16 Proper wind turbine siting

Wind turbine performance curves

TM02 2306 4101

2

3

4

5

1

8

5

9

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

8 Wind turbine — Whisper 200

9 IO 102 SQFlex breaker box

20 ft

250 ft

1000

800

600

400

200

0

5 10 15 20 25 30 35 40 mph

2.3 4.5 6.8 9.0 11.3 13.5 15.8 18.0 m/s

Instantaneous Wind Speed

Power Output (W)

Whisper 200

400

300

200

100

0

4 6 8 10 12 14 16 mph

1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.0 m/s

Annual Average Wind Speed

Monthly Energy Output (kWh)

Whisper 200

= Page 18 =

Selection

SQFlex 3

19

SQFlex Wind

- with CU 200 and level switch

The SQFlex Wind system a llows wind energy to be

stored as water in a reservoir.

SQFlex Wind water supply systems with a water

reservoir are used where

• for short periods, the wind energy is insufficient to

run the pump

• there is a need for a back-up water source.

As the turbine noise level increases with the wind

speed, installation of the wind turbine near a residence

is not recommended.

Benefits

Combined with the CU 200, the level switch acts as a

pump cut-out function when the water reservoir is full.

The CU 200 offers indication of

• full water reservoir (level switch activated)

• pump operation

• input power.

The CU 200 indicates operational stoppage in case of

• dry running

• service (see page 35)

• insufficient energy supply.

The IO 102 makes it possible to switch off the power

supply in the system and to slow down or stop the wind

turbine when

• there is no need for water supply

• the system requires service.

Other benefits of the system include

• easy installation

• a minimum of maintenance.

Fig. 17 SQFlex Wind with CU 200 and level switch

TM02 2308 4101

2

3

4

5

1

14

5

15

8

11

9

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

8 Wind turbine

9 IO 102 SQFlex breaker box

11 CU 200 SQFlex control unit

14 Water reservoir

15 Level switch

= Page 19 =

Selection

SQFlex 3

20

SQFlex Combo

- combination of solar and wind energy

The SQFlex Combo water supply system is ideal in

areas where the solar and/or wind energy is sufficient

to run the pump.

The energy supply to the pump is a combination of

solar and wind energy.

As the turbine noise level increases with the wind

speed, installation of the wind turbine near a residence

is not recommended.

Benefits

The system offers water supply during the night or

during periods of insufficient solar energy.

Other benefits of the system include

• easy to install

• maintenance confined to periodic cleaning of

the solar panels

• few and simple components.

The IO 102 makes it possible to switch off the power

supply in the system and to slow down or stop the wind

turbine when

• there is no need for water supply

• the system requires service.

Fig. 18 SQFlex Combo – combination of solar and wind energy

TM02 2307 4101

2

3

4

5

1

5

9

7

6

8

Note: For the number of solar modules required,

please consult the sizing to ol in Grundfos WinCAPS.

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

8 Wind turbine

9 IO 102 SQFlex breaker box

= Page 20 =

Selection

SQFlex 3

21

SQFlex Combo

- with CU 200 and level switch

The SQFlex Combo system allows solar and wind

energy to be stored as water in a reservoir.

SQFlex Combo water supply systems with a water

reservoir are used where

• for short periods, the solar or wind energy is

insufficient to run the pump

• there is a need for a back-up water source.

As the turbine noise level increases with the wind

speed, installation of the wind turbine near a residence

is not recommended.

Benefits

Combined with the CU 200, the level switch acts as a

pump cut-out function when the water reservoir is full.

The CU 200 offers indication of

• full water reservoir (level switch activated)

• pump operation

• input power.

The CU 200 indicates operational stoppage in case of

• dry running

• service (see page 35)

• insufficient energy supply.

The IO 102 makes it possible to switch off the power

supply in the system and to slow down or stop the wind

turbine when

• there is no need for water supply

• the system requires service.

Other benefits of the system include

• easy installation

• a minimum of maintenance.

Fig. 19 SQFlex Combi with CU 200 and level switch

TM02 2310 4101

2

3

4

5

1

14

5

15

7

8

9

6

11

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

6 Solar panels

7 Support structure

8 Wind turbine

9 IO 102 SQFlex breaker box

11 CU 200 SQFlex control unit

14 Water reservoir

15 Level switch

Note: For the number of solar modules required,

please consult the sizing tool in Grundfos WinCAPS.

= Page 21 =

Selection

SQFlex 3

22

SQFlex system

- with generator as power supply

The SQFlex water supply system is connected to

a diesel or gasoline driven generator.

The generator must be running steadily before the

pump is cut in.

Benefits

The system offers water supply 24 hours a day,

independently of the weather.

Other benefits of the system include

• easy installation

• a minimum of maintenance required

• few and simple components.

Fig. 20 SQFlex system with generator as power supply.

TM02 2311 4101

2

3

4

5

1

5

10

1 SQF pump

2 Submersible drop cable

3 Cable clips

4 Straining wire

5 Wire clamp

10 Diesel or gasoline driven generator

= Page 22 =

Solar panel wiring

SQFlex 4

23

4. Solar panel wiring

Methods of solar panel wiring

Solar panels can be connected in one of three

methods:

1. Series wiring

2. Parallel wiring

3. Series/parallel wiring (a combination of the two)

The Grundfos SQFlex pump is most efficient at

voltages of 120V and above, up to a max of 300V. To

maximize pump performance connect panels to obtain

at least 120V.

Series wiring

All solar panels have a negative (-) and a positive (+)

terminal.

When wiring panels in series, voltages add and

amperage stays the same.

To wire panels in series connect the positive terminal

of one panel to the negative terminal of the next panel.

Fig. 21 Solar panel wiring in series

Panel voltages add in series, so if the panels in fig. 21

are rated at 70V (GF100), then the total voltage will be:

70 + 70 + 70 + 70 = 280V

Panel amperage remains the same, so if each panel

produces 1.43 amps, then the total current will be 1.43

amps.

Panel wattage always adds, so if each panel is rated at

100W the total wattage (Watts = Volts x Amps) output

will be:

100 + 100 + 100 + 100 = 400W

Parallel wiring

When wiring panels in parallel, resu