GRUNDFOS
PRODUCT GUIDE
SQFlex
Renewable-energy based water-supply systems
60 Hz
Contents
2
Product data
Performance range 3
Application 4
The SQFlex system 4
Type keys 5
Pumped liquids 5
Curve conditions 6
Wiring diagram for pump 6
Pump overview 6
Dry-running protection 7
High efficiency 7
Over- and undervoltage protection 7
Overload protection 8
Overtemperature protection 8
Maximum Power Point Tracking (MPPT) 8
Wide voltage range 8
Reliability 8
Installation 8
Service 8
System overview 9
Application examples
SQFlex Solar 10
SQFlex Wind 13
SQFlex Combo 15
SQFlex system 17
System components
CU 200 18
Electrical connections, CU 200 19
IO 100 20
Wiring diagram, IO 100 20
IO 101 20
Electrical connections, IO 101 20
IO 102 21
Electrical connections, IO 102 21
Generator 21
System sizing
Sizing of SQFlex system 22
Example 22
Performance curves
24
Technical data
Dimensions and weights 28
Electrical data 28
IO 100 switch box 29
IO 101 switch box 29
IO 102 breaker box 29
CU 200 control unit 30
Material specification - helical rotor pump 31
Material specification - centrifugal pump 32
Material specification - motor 33
Product numbers
Complete unit with 6 ft cable 34
Submersible drop cables 34
IO 100 35
IO 101 35
CU 200 35
IO 102 35
Wind turbine H80 Whisper 35
Tower kit for H80 Whisper 36
Tower installation kit 36
Tower pipe selection 36
Accessories
Auger / anchor 37
Grease 37
Further product documentation
WinCAPS 38
WebCAPS 39
3
Product data
SQFlex
Performance range
Note: Do not use the above curves for sizing of the pump.
TM02 2433 4201
0 4000 8000 12000 16000 20000
Q [US GPD]
0
50
100
150
200
250
300
350
[ft]
H
SQFlex Solar
A B C D E F G H
H 1200 Wp
G 900 Wp
F 700 Wp
E 500 Wp
D 400 Wp
C 300 Wp
B 200 Wp
A 100 Wp
TM02 2434 4201
0 4000 8000 12000 16000 20000
Q [US GPD]
0
50
100
150
200
250
300
350
[ft]
H
SQFlex Wind
A B C D
D 18 mph
C 16 mph
B 14 mph
A 11 mph
4
Product data
SQFlex
Application
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.
The SQFlex system
The SQFlex system is a reliable water supply system
based on renewable energy sources, such as solar and
wind energy. The SQFlex system is equipped with the
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 control unit
• IO 100 and IO 101 switch boxes
• IO 102 breaker box
• energy supply:
- solar panels
- wind turbine
- generator
- batteries.
Pump
The SQF pump range comprises two pump technologies:
• Helical rotor pump (3") for high heads and moderate
flows.
• Centrifugal pump (4") for lower heads and high
flows based on the Grundfos SP A pump.
The performance curves below illustrate pump performance for the two pump technologies:
Motor
The SQFlex motor range comprises only one motor
size, the MSF 3 with max. power input (P1) of 900 W.
MSF 3 is a 3" motor.
The speed range for the motor is 500-3000 rpm
depending on the power input and the load.
The motor has been developed especially for the
SQFlex system.
The SQFlex motor has three internal limitations,
• max. power consumption (P1) of 900 W
• max. current of 7 A and
• max. speed of 3000 rpm.
The pump delivers its maximum performance when one
of the above limitations is reached.
The motor is available in stainless steel EN/DIN 1.4301.
The motor is designed according to the permanentmagnet principle with built-in electronic unit.
Voltage supply
The motor can be supplied with either AC or DC
voltage.
• 30 - 300 VDC, PE
• 1 x 90 - 240 V –10%/+6%, 50/60 Hz, PE.
TM02 2425 3901
Q
H
A
B
A: Helical rotor pump
B: Centrifugal pump
/Day
5
Product data
SQFlex
IO 100 switch box
The IO 100 is an on/off switch box designed as a positive disconnect for the system voltage supply.
IO 101 switch box
The IO 101 is an on/off switch box designed as a positive disconnect for the system voltage supply.
The IO 101 is used with SQFlex systems supplied by
solar panels and with a generator supply backup.
IO 102 breaker box
The IO 102 is an on/off switch box designed as a positive disconnect for the system voltage supply.
The IO 102 is used with wind-powered SQFlex systems
or with SQFlex systems powered by wind and solar
energy.
IO 102 acts as a brake which makes it possible to slow
down or stop the wind turbine.
CU 200 control unit
The CU 200 control unit is a combined status and
control unit for the SQFlex pump system. Furthermore,
the CU 200 enables connection of a level switch placed
in a water reservoir or similar tank.
Solar modules
Grundfos’ solar modules have been developed especially for the SQFlex system. The solar modules are
equipped with plugs and sockets enabling easy and
simple installation.
Grundfos offers data sheets for available solar
modules. For further information please contact your
local Grundfos Company.
Generator
If the electricity supply from its primary source of
energy is temporarily insufficient, the SQFlex system
can be supplied by a generator. The generator can
either be diesel or gasoline driven.
Batteries
The SQFlex system can be supplied by batteries with a
voltage supply of 30 - 300 VDC, minimum current 7A.
Type keys
Type key for helical rotor pumps
T ype key for centrifugal pumps
Pumped liquids
The SQF pumps are designed for pumping thin, clean,
non-aggressive, non-explosive liquids, not containing
solid or long-fibred particles larger than sand grains.
Sand content: max. 50 ppm.
A higher sand content will reduce the pump life consid-
erably due to wear.
pH: 5 - 9
Liquid temperature: 32°F to +104°F
The pump can run at free convection (~ 0 ft/sec) at max.
+104°F.
Salt content
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 4 - 9.
Example 6 SQF -2 x
Rated flow at 3000 rpm [US
GPM]
Type range
Number of stages
Blank = Stainless steel
AISI 304
Example 25 SQF -3 x
Rated flow at 3000 rpm [US GPM]
and pump generation
Type range
Number of stages
Blank = Stainless steel
AISI 304
Stainless steel
Cl
-
content
[ppm]
Liquid
temperature
[°F]
EN/DIN AISI
1.4301 304
0 - 300 < 104
300 - 500 < 86
6
Product data
SQFlex
Curve conditions
The SQFlex Solar performance range shown on page 3
is based on:
• solar radiation on a tilted surface
•H
T
= 6 kWh/m2 per day
• 20° tilt angle
• ambient temperature: +86°F
• 20° northern latitude
• panel voltage: 120 VDC
• an 11 hour standard solar day.
The SQFlex Wind performance range shown on page 3
is based on:
• average wind speed
• calculations according to Weibull’s factor k = 2
• continuous operation over 24 hours.
The performance charts on pages 24 to 27 are based
on the following guidelines:
• All curves show mean values.
• The curves must not be used as guarantee curves.
• Typical deviation: +/–15%.
• The measurements were made at a water temperature of +86°F.
• The curves apply to a kinematic viscosity of 1 mm
2
/
s (1 cSt). If the pump is used for liquids with a viscosity higher than that of water, this will reduce the
head and increase the power consumption.
• The performance curves are inclusive of inlet and
valve losses at the actual speed.
• Supply to pump: 120 VDC.
Wiring diagram for pump
Connection of the MSF motor to the power supply must
be done according to the wiring diagram shown below.
As the intelligent motor electronics can handle both
connection possibilities, it makes no difference how the
wires "+" and "–" or "N" and L" are connected.
Pump overview
The SQF pump is available as a complete unit.
TM02 2437 3901
NL
30 - 300 VDC
1 x 90 - 240 VAC
Element Drawing Description
SQF pump complete
TM02 2217 3901
SQF pump complete with ...
•motor
• 6 ft cable with water level electrode, end cover,
socket and
• cable guard.
7
Product data
SQFlex
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 inches above the pump
depending on the 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 min. after the water level is above the water
level electrode.
High efficiency
The MSF 3 motor is a permanent-magnet motor (PM
motor) featuring a higher efficiency within the power
range compared to a conventional asyncronous motor.
In addition to this the segmented motor stator contributes considerably to the high efficiency.
The MSF 3 motor is characterized by a high lockedrotor torque even at low power supply.
Over- and undervoltage protection
Overvoltage and undervoltage may occur in the case of
unstable voltage supply or a faulty installation.
The pump will be cut out if voltage falls outside the
permissible voltage range. The motor is automatically
cut in again 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 the voltage supply according to IEC 60664-1
"overvoltage category III" (4 kV). In areas with high
lightning intensity, external lightning protection is
recommended.
TM02 2436 3901TM02 2435 3901
12 - 24 in
12 - 24 in
8
Features and benefits
SQFlex
Overload protection
If the upper load limit is exceeded, the motor will automatically compensate for 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 sec. after which
period the pump will automatically attempt a restart.
The overload protection prevents 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. An efficient internal circulation system
leads the heat away from the rotor, stator and bearings
ensuring optimum operating conditions for the motor.
As an extra protection, the electronic unit has a built-in
temperature sensor. When the temperature rises above
+185°F, the motor is automatically cut out; when the
temperature has dropped to +167°F, 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-function, the pump duty point is
continuously optimised 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.
Reliability
The MSF 3 has been developed to provide optimum
reliability which is achieved through the following
features:
• carbon/ceramic bearings
• excellent starting capabilities
• various protection facilities.
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,
• comes with cable and cable cover pre-installed.
Note: Horizontal installation requires the water level
electrode to be placed min. 12 to 24 inches above the
pump to ensure the dry-running protection.
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 nuts which enable
replacement in the field.
TM02 2246 3901TM 02 24 35 3901
Allowed
Not allowed
12 - 24 in
9
System overview
The SQFlex system can be used in a number of combinations as shown in the table below.
System ... ... consists of the following components
Pump
Solar panel
Wind turbine
Generator/
supply network
Switch box
CU 200
Control unit
Level switch
SQFlex Solar
See page 10.
SQFlex Solar
- with CU 200 control unit and level switch
See page 11.
SQFlex Solar
- with generator as power supply back-up
See page 12.
SQFlex Wind
See page 13.
SQFlex Wind
- with CU 200 control unit and level switch
See page 14.
SQFlex Combi
- combination of solar and wind energy
See page 15.
SQFlex Combi
- with CU 200 and level switch
See page 16.
SQFlex system
- with generator as power supply
See page 17.
()()()()
For the number of solar modules required, please consult the sizing tool in WinCAPS.
Can be excluded from the installation.
May be a component in the system.
IO 100
CU 200
()
IO 101
IO 102
IO 102
CU 200
()
IO 102
IO 102
CU 200
()
IO 101
Features and benefits
SQFlex
10
Application examples
SQFlex
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 100 switch box, the voltage supply to
the pump can be closed manually, e.g. when ...
• there is no need for water supply
• the system requires service.
TM02 2304 4101
2
3
4
5
1
6
7
12
5
1 SQF pump
2Cable
3Cable clips
4 Straini ng wire
5 W ire clamp
6 Solar panels
7 Support structure
12 IO 100 switch box
Note: For the number of solar modules
required, please consult the Sizing tool.
11
Application examples
SQFlex
SQFlex Solar
- with CU 200 control unit and level switch
The SQFlex Solar system allows energy from the sun 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 night-time water supply
• 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.
CU 200 offers indication of ...
• full water reservoir (level switch activated)
• pump operation
• input power.
CU 200 indicates operational stoppage in case of ...
• dry running
• service (see page 18)
• insufficient energy supply.
In addition, the system features ...
• easy installation
• maintenance confined to periodic cleaning of the
solar panels.
TM02 2305 4101
2
3
4
5
1
6
7
11
14
5
15
1 SQF pump
2Cable
3Cable clips
4 Straining wire
5 Wire clamp
6 Solar panels
7 Support structure
11 CU 200 control unit
14 Water reservoir
15 Level switch
Note: For the number of solar modules
required, please consult the Sizing tool.
12
Application examples
SQFlex
SQFlex Solar
- with generator as power supply back-up
During periods of limited solar energy, the SQFlex
Solar water supply system provides a safe supply of
water. The system is connected to an external generator as back-up via the IO 101 switch box.
The system enables operation ...
• via generator when ...
- the energy supply from the solar panels is
insufficient
• via solar energy when ...
- the generator is stopped manually
- the generator runs out of fuel.
Benefits
• Offers water supply at night or when the solar
energy is insufficient
• Easy to install
• Maintenance confined to periodic cleaning of the
solar panels
• Few and simple components
• Flexible in terms of energy supply.
TM02 2309 4101
2
3
4
5
1
6
7
13
5
10
1 SQF pump
2Cable
3Cable clips
4 Straining wire
5 Wire clamp
6 Solar panels
7 Support structure
10 Generator
13 IO 101 switch box
Note: For the number of solar modules
required, please consult the Sizing tool.
13
Application examples
SQFlex
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, siting of the wind turbine near a residence is not
recommended.
The IO 102 breaker box makes it possible to brake the
wind turbine when ...
• there is no need for water supply
• the system requires service.
Benefits
• Easy to install
• A minimum of maintenance required
• Few and simple components.
TM02 2306 4101
2
3
4
5
1
8
5
9
1 SQF pump
2Cable
3Cable clips
4 Straini ng wire
5 W ire clamp
8 W ind turbine
9 I O 102 breaker box
14
Application examples
SQFlex
SQFlex Wind
- with CU 200 control unit and level switch
The SQFlex Wind system allows energy from the wind
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, siting 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.
CU 200 offers indication of ...
• full water reservoir (level switch activated)
• pump operation
• input power.
CU 200 indicates operational stoppage in case of ...
• dry running
• service (see page 18)
• insufficient energy supply.
The IO 102 breaker box makes it possible to interrupt
the supply voltage in the system and to slow down or
stop the wind turbine when ...
• there is no need for water supply
• the system requires service.
In addition, the system features ...
• easy installation
• a minimum of maintenance.
TM02 2308 4101
2
3
4
5
1
14
5
15
8
11
9
1 SQF pump
2Cable
3Cable clips
4 Straining wire
5 Wire clamp
8 Wind turbin e
9 IO 10 2 breaker box
11 CU 200 control unit
14 Water reservoir
15 Level switch
15
Application examples
SQFlex
SQFlex Combo
- combination of solar and wind energy
The SQFlex Combi water supply system is ideal in
areas where the solar 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, siting of the wind turbine near a residence is not
recommended.
Benefits
• Offers water supply at night or when the solar
energy is insufficient
• Easy to install
• Maintenance confined to periodic cleaning of the
solar panels
• Few and simple components.
The IO 102 breaker box makes it possible to interrupt
the supply voltage in the system and to slow down or
stop the wind turbine when ...
• there is no need for water supply
• the system requires service.
In addition, the system features ...
• easy installation
• a minimum of maintenance.
TM02 2307 4101
2
3
4
5
1
5
9
7
6
8
1 SQF pump
2Cable
3Cable clips
4 Straining wire
5 Wire clamp
6 Solar panels
7 Support structure
8 Wind turbin e
9 IO 10 2 breaker box
Note: For the number of solar modules
required, please consult the Sizing tool.
16
Application examples
SQFlex
SQFlex Combo
- with CU 200 and level switch
The SQFlex Combi system allows solar and wind
energy to be stored as water in a reservoir.
SQFlex Combi water supply systems with a water
reservoir are used where ...
• for short periods, the solar or wind energy is in sufficient to run the pump
• there is a need for a back-up water source.
As the turbine noise level increases with the wind
speed, siting 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.
CU 200 offers indication of ...
• full water reservoir (level switch activated)
• pump operation
• input power.
CU 200 indicates operational stoppage in case of ...
• dry running
• service (see page 18)
• insufficient energy supply.
The IO 102 breaker box makes it possible to interrupt
the supply voltage in the system and to slow down or
stop the wind turbine when ...
• there is no need for water supply
• the system requires service.
In addition, the system features ...
• easy installation
• a minimum of maintenance.
TM02 2310 4101
2
3
4
5
1
14
5
15
7
8
9
6
11
1 SQF pump
2Cable
3Cable clips
4 Straini ng wire
5 W ire clamp
6 Solar panels
7 Support structure
8 W ind turbine
9 I O 102 breaker box
11 CU 200 control unit
14 Water reservoir
15 Level switch
Note: For the number of solar modules
required, please consult the Sizing tool in
WinCAPS.
17
Application examples
SQFlex
SQFlex system
- with generator as power supply
The SQFlex water supply system is connected to a
gene-rator, which can be diesel or gasoline driven.
Benefits
• Offers water supply 24 hours a day independent of
the weather.
• Easy installation.
• Few and simple components.
TM02 2311 4101
2
3
4
5
1
5
10
1 SQF pump
2Cable
3Cable clips
4 Straini ng wire
5 W ire clamp
10 Generator
18
System components
SQFlex
CU 200
The CU 200 control unit is a combined status, control
and communication unit specifically developed for the
SQFlex system. Furthermore, the CU 200 enables
connection of a level switch.
The CU 200 incorporates cable entries for ...
• power supply connection (pos. 6),
• pump connection (pos. 7),
• earth connection (pos. 8),
• level switch connection (pos. 9).
(The position numbers shown in brackets refer to the
drawing to the right).
Communication between the CU 200 and the pump
takes place via the pump power supply cable. This is
called mains borne signalling (or Power Line Communication), and this principle means that no extra cables
between the CU 200 and the pump are required.
It is possible to start, stop and reset the pump by means
of the on/off button (pos. 1).
The CU 200 control unit offers:
• System monitoring
• Alarm indication.
The following indications allow the operation of the
pump to be monitored:
• Water reservoir is full (level switch) (pos. 2)
• Pump is running (pos. 3)
• Input power (pos. 11).
The CU 200 offers the following alarm indications:
• Dry running (pos. 10)
• Service needed (pos. 5) in case of:
- No contact to pump
- Overvoltage
- Overtemperature
- Overload.
In addition, the CU 200 shows the symbols of the
energy supply options (pos. 4).
Dimensions, CU 200
Dimensions stated in inches.
TM02 2325 4101TM02 8730 0804
1
2
3
11
4
5
10
8
7
6
9
7.75"
3.75"
10.5"
19
System components
SQFlex
Electrical connections, CU 200
TM02 2515 4401
GND IN
F1 = OVERVOLTAGE
F2 = OVERTEMP
F3 = NO CONTACT
F4 = OVERLOAD
CONTROL INDICATOR
MAX SPEED
+24 V
+10 V
+5 V
LEVEL SWITCH
POWER PUMP
PE PE PE
GND IN
F1 = OVERVOLTAGE
F2 = OVERTEMP
F3 = NO CONTACT
F4 = OVERLOAD
CONTROL INDICATOR
MAX SPEED
+24 V
+10 V
+5 V
LEVEL SWITCH
High water level:
Contact is closed
Low water level:
Contact is open
Level switch input:
20
System components
SQFlex
IO 100
The IO 100 switch box is designed specifically for solar
powered SQFlex systems.
The IO 100 enables manual starting and stopping of the
pump in an SQFlex Solar system and functions as a
connection box joining all necessary cables.
The dimensions and wiring diagram of IO 100 are
shown below.
Dimensions, IO 100
Dimensions stated in inches.
Wiring diagram, IO 100
IO 101
The IO 101 switch box is designed specifically for solar
powered SQFlex systems.
The IO 101 enables the connection of a generator
supply back-up in case of insufficient solar radiation.
The switching between solar power and generator must
be made manually.
When the generator is stopped manually or runs out of
fuel, the IO 101 will automatically switch to the solar
energy supply.
The IO 101 functions as a connection box joining all
necessary cables.
The dimensions and electrical connections of IO 101
are shown below.
Dimensions, IO 101
Dimensions stated in inches.
Electrical connections, IO 101
TM02 8731 0804TM02 4058 4701
7.75"
4.5"10.5"
TM02 8732 0804TM02 4162 5001
7.75"
10.5"
4.5"
Ground
Generator
PE
Power Pump
21
System components
SQFlex
IO 102
The IO 102 breaker box is designed specifically for
wind powered SQFlex systems.
The IO 102 enables manual starting and stopping of the
pump in an SQFlex Wind system and an SQFlex
Combo system.
The on/off switch has a built-in electrical brake for the
turbine. When the switch is in the "off" position, the
turbine stops or slows down.
The IO 102 rectifies the three-phase AC voltage from
the wind turbine into DC voltage. Furthermore, the IO
102 enables the combination of wind energy from the
wind turbine and solar energy from the solar pane l.
At the same time, the IO 102 also functions as a
connection box joining all necessary cables.
Dimensions and wiring diagram of the IO 102 are
shown below.
Dimensions, IO 102
Dimensions stated in inches.
Electrical connections, IO 102
Generator
The generator can be either diesel or gasolin e driven.
The generator must be running steadily before the
pump is cut in.
TM02 8733 0804TM02 4312 0502
7.75"
10.5"
4.5"
PumpPower
PE
Wind turbine
PE
_
+
22
System sizing
SQFlex
Sizing of SQFlex system
Grundfos has developed a PC-based sizing tool
enabling the sizing of SQFlex systems.
The sizing tool is also available in a paper version. The
PC-based sizing tool is integrated in WinCAPS and
covers both solar and wind powered systems. The
paper version covers both solar powered and wind
powered systems.
The following three parameters must be known for the
sizing of the optimum SQFlex system:
• installation location
• max. head required and
• 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.
The following example shows the sizing of a solar
powered SQFlex system using the paper version of the
sizing tool.
For the sizing of a wind powered SQFlex system,
please refer to the WinCAPS version.
Example
Conditions:
• installation location: Austin, Texas
• required head: 220 ft
• quantity of water required: 1500 gal/day
Proceed as follows:
1. Find Austin, TX on the map.
The map shows that Austin is located in solar radiation zone K, and the recommended tilt angle of the
solar panel is 30°.
2. Go to the sizing table and find zone K and tilt
angle 30°.
3. Find the required head (A) and the required flow (B)
and read the recommended SQF pump type (C),
number of solar modules (D) and the output power
of the solar modules (E).
SQFlex system configuration:
Pump: 6 SQF-2
Number of solar modules: 8
Power: 50 Wp x 8 = 400 Wp.
23
System sizing
SQFlex
North-America (July)
Sizing table
TM02 8743 0804
ilt an
g
le 45˚
ilt an
g
le 30˚
ilt an
g
le 15˚
11
0120100
80
7
0
5
0
60
4
0
3
0
2
0
1
0
90
11
0120100
80
7
0
90
K
M
J
J
J
G
H
I
Can
ada
Mexic
o
TX
WA
ID
ND
SD
K
S
WY
C
O
MI
AL
MS
N
C
MN
WI
NY
LA
Zone
Solar
radia-
tion
Required head [ft]
No. of 50 Wp
modules
Power [Wp]
20 40 60 90 120 160
180 220
(A)
260 300 340 360 390
Zone K - tilt angle 30°
7.3 kWh/m
2
per day
Required flow [gal/day]
4 200
5810 3380 2770 1740 1060 819 766 687 608 502 423 370 291
25
SQF-3
11 SQF- 2
6
SQF-
2
3 SQF-2
13600 6340 5150 402 0 2990 2060 1820 1530
(B)
1240 1080 1000 951 872
8
(D)
400
(E)
75
SQF-3
25
SQF-
3
11 SQF-2 6 SQF-2 (C) 3 SQF-2
20400 9670 6970 523 0 4490 3490 3060 2190 1960 1720 1510 1370 1190
12 600
75
SQF-3
25 SQF-6 11 SQF-2 6 SQF-2
25900 14100 9700 5890 5150 4440 4070 3280 2460 2090 1900 1850 1690
16 800
75 SQF-3
25
SQF-6
3 SQF-2 6 SQF-2
30400 18400 12100 798 0 5550 4940 4620 3910 3280 2480 2170 2090 1930
20 1000
75 SQF-3
25
SQF-6
11 SQF-2 6 SQF-2
24
Performance curves
SQFlex
TM02 2426 4201
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340
P1 [W]
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
[US GPM]
Q
3 SQF-2
360 ft
330 ft
300 ft
270 ft
240 ft
210 ft
180 ft
150 ft
120 ft
90 ft
75 ft
60 ft
45 ft
30 ft
TM02 2427 4201
0 50 100 150 200 250 300 350 400 450 500 550 600
P1 [W]
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
4.4
4.8
5.2
[US GPM]
Q
6 SQF-2
30 ft
45 ft
60 ft
75 ft
90 ft
120 ft
150 ft
180 ft
210 ft
240 ft
270 ft
300 ft
330 ft
360 ft
25
Performance curves
SQFlex
TM02 2428 4201
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900
P1 [W]
0
1
2
3
4
5
6
7
8
9
10
11
[US GPM]
Q
11 SQF-2
300 ft
270 ft
240 ft
210 ft
180 ft
150 ft
120 ft
90 ft
75 ft
60 ft
45 ft
30 ft
15 ft
TM02 2429 4201
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420
P1 [W]
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
[US GPM]
Q
25 SQF-3
45 ft
30 ft
15 ft
6 ft
26
Performance curves
SQFlex
TM02 2430 4201
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900
P1 [W]
0
4
8
12
16
20
24
28
32
36
40
[US GPM]
Q
25 SQF-6
90 ft
60 ft
30 ft
75 ft
45 ft
TM02 2431 4201
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800
P1 [W]
0
5
10
15
20
25
30
35
40
45
50
55
60
65
[US GPM]
Q
40 SQF-3
25 ft
15 ft
6 ft
30 ft
27
Performance curves
SQFlex
TM02 2432 4201
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900
P1 [W]
0
8
16
24
32
40
48
56
64
72
80
88
[US GPM]
Q
75 SQF-3
6 ft
15 ft
30 ft
45 ft
28
Technical data
SQFlex
Dimensions and weights
Electrical data
30 - 300 VDC or 1 x 90 - 240 VAC, 50/60 Hz
TM02 8323 5103
Pump type
Dimensions [in]
Net
weight
[lb]
Shipping
weight
[lb]
Shipping
volume
[ft
3
]
LBS
3 SQF-2 47 2.9 1" NPT 17 21 0.75
6 SQF-2 48 2.9 1" NPT 17.5 21.5 0.75
11 SQF-2 49 2.9 1¼" NPT 18 22 0.75
25 SQF-3 32 3.9 1½" NPT 18 21 0.56
25 SQF-6 35 3.9 1½" NPT 19.5 23 0.56
40 SQF -3 36 3.9 2" NPT 21 24.5 0.56
75 SQF -3 39 3.9 2" NPT 24 27.5 0.56
Pump complete
L
5/16"
B
S
Pump type Motor type
Max. power input P
1
[W]
Max. current [A]
3 SQF-2 MSF 3 900 7
6 SQF-2 MSF 3 900 7
11 SQF-2 MSF 3 900 7
25 SQF-3 MSF 3 900 7
25 SQF-6 MSF 3 900 7
40 SQF-3 MSF 3 900 7
75 SQF-3 MSF 3 900 7
29
Technical data
SQFlex
SQF pump
Supply to pump
1 x 90 - 240 V –10%/+6%, 50/60 Hz.
30 - 300 VDC.
Run-up time Depending on power source.
Start/stop No limitation to the number of starts/stops per hour.
Enclosure class IP 68.
Motor protection
Built into the pump.
Protection against:
- Dry running by means of a water level electrode.
- Overvoltage and undervoltage.
- Overload.
- Overtemperature.
Conductivity ≥ 70 µs/cm (micro siemens).
Sound pressure level The sound pressure level is lower than the limiting values stated in the EEC Machinery Directive.
Radio noise
SQF comply with EMC Directive 89/336/EEC.
Approved according to EN 50081-1 and 50082-2.
Reset function SQF can be reset via CU 200 or by disconnecting the power from the power supply in 1 minute.
Power factor PF = 1.
Operation via generator
Voltage: 115 VAC, –10%/+6%.
The generator output must be a minimum of 1000 Watts.
Earth leakage circuit breaker
If the pump is connected to an electrical installation where an earth-leakage circuit breaker
(ELCB) is used as an additional protection, this circuit breaker must trip out when earth fault
currents with DC content (pulsating DC) occur.
Borehole diameter
3 SQF-2, 6 SQF-2, 11 SQF-2: Minimum: 3 inch.
25 SQF-3, 25 SQF-6, 40 SQF-3, 75 SQF-3: Minimum: 4 inch.
Installation depth
Min.: The pump must be totally submerged in the pumped liquid.
Max.: 500 ft below the static water table (220 psi).
Suction strainer
Holes of the suction strainer:
3 SQF-2, 6 SQF-2, 11 SQF-2: 0.090 inch.
25 SQF-3, 25 SQF-6: 0.10 inch.
40 SQF-3, 75 SQF-3: 0.16 inch x 0.79 inch.
Pumped liquids
pH 5 to 9.
Sand content up to 50 ppm.
Marking CE
IO 100 switch box
Voltage
Max. 225 VDC, 7 A.
Max. 265 VAC, 7 A.
Enclosure class IP 55 / NEMA 3R.
Ambient temperature In operation: –22°F to +122°F; during storage: –22°F to +140°F.
Marking CE
IO 101 switch box
Voltage
115 VAC –15%/+10%, 50/60 Hz (internal relay).
Max. 225 VDC, 7 A
Max. 265 VAC, 7 A
Enclosure class IP 55 / NEMA 3R.
Ambient temperature In operation: –22°F to +122°F; during storage: –22°FC to +140°F.
Marking CE
IO 102 breaker box
Voltage
Max. 225 VDC, 7 A.
Max. 265 VAC, 7 A.
Enclosure class IP 55 / NEMA 3R.
Ambient temperature In operation: –22°C to +122°F; during storage: –22°C to +140°F.
Marking CE
30
Technical data
SQFlex
CU 200 control unit
Voltage
30 - 300 VDC
90 - 240 VAC –10%/+6% , 50/60, PE.
Power consumption 5 W.
Current consumption Max. 130 mA.
Enclosure class IP 55 / NEMA 3R.
Ambient temperature In operation: –22°C to +140°F; during storage: –22°C to +140°F.
Relative air humidity 95%.
Pump cable
Max. length between CU 200 and pump: 660 feet.
Max. length between CU 200 and level switch: 1640 feet.
Back-up fuse Max.: 10 A.
Radio noise
The CU 200 complies with EMC Directive 89/336/EEC.
Approved according to standards EN 55 014 and 55 014-2.
Marking CE.
Weight 4.5 lb
31
Technical data
SQFlex
Material specification - helical rotor pump
Pos. Description Material
SQF
Example: 6 SQF - 2
TM02 2213 3901
EN/DIN AISI
1 Valve casing Polyamide
1a Discharge chamber Stainless steel 1.4301 304
1d O-ring NBR
2 Valve cup Polyamide
3 Valve seat NBR
6 Flange, upper Stainless steel 1.4301 304
7a Circlip Stainless spring steel 1.4310 310
9 Pump stator Stainless steel/EPDM 1.43 01 304
13 Pump rotor
Hard-chromed stainless steel
1.4301 304
16 Torsion shaft Stainless steel 1.4401 316
39 Valve spring Stainless spring steel 1.4406 316 LN
55 Outer sleeve Stainless steel 1.4301 304
70 Valve guide Polyamide
Cable guard Stainless steel 1.4301 304
Screws for cable
guard
Stainless steel 1.4401 316
1a
2
39
70
1d
3
1
7a
6
9
13
16
55
32
Technical data
SQFlex
Material specification - centrifugal pump
Pos. Description Material
SQF
Example: 25 SQF - 6
TM02 2439 4301
EN/DIN AISI
1 Valve casing Stainless steel 1.4301 304
4 Chamber , upper Stainless stee l 1.4301 304
6 Top bearing NBR
7 Neck ring NBR/PPS
8 Bearing NBR
9 Chamber , complete Stainless steel 1.4301 304
11 Nut for split cone Stainless steel 1.4301 304
12 Split cone Stainless steel 1.4301 304
13 Impeller Stainless steel 1.4301 304
14 Inlet part Stainless steel 1.4301 304
14a
Connecting piece, complete
(MSF 3 adapter)
Stainless steel 1.4301 304
15 Strainer Stainless steel 1.4301 304
16 Shaft, cylindrical Stainless steel 1.4057 431
17 Strap Stainless steel 1.4301 304
18 Cable guard, pump Stainless steel 1.4301 304
18c Cable guard, motor Stainless steel 1.4301 304
19 Nut for strap Stainless steel 1.4301 304
19a Nut Stainless steel 1.4401 316
24 Coupling with nut Stainless steel 1.4462 329
24a Supporting ring Stainless steel 1.4401 316
24b Spline protector NBR
25
Retainer for neck ring,
complete
Stainless steel 1.4301 304
85
Stop ring
Only 25 SQF and 75 SQF
Carbon/graphite
PTFE
Screws for cable guard Stainless steel 1.4401 316
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
33
Technical data
SQFlex
Material specification - motor
Pos. Description Material
MFS 3
MFS 3
TM02 2215 3901
EN/DIN AISI
201
Stator with sleeve,
complete
Stainless steel 1.4301 304
202 Rotor Stainless steel 1.4301 304
202a Stop ring PP
202c Shaft end S tainless steel 1.4401 316
203 Thrust bearing, stationary St ainless steel/carbon 1.4401 316
205
Bearing plate with radial
bearing
Silicon carbide 1.4301 304
206 Thrust bearing, rotating
Stainless steel/
aluminium oxide
Al
2O3
1.4401 316
220 Motor cable with plug
222a Filling plug NBR
223 Electronic unit
224 O-ring
Standard version:
NBR.
225 Top cover PPS
232 Shaft seal MFS 3: NBR.
243 Thrust-bearing housing Stainless steel 1.4408 316
250 Nut (M4) Stainless steel 1.4401 316
232
222a
224
225
201
202
205
202a
223
220
250
202c
206
203
243
34
SQFlex
Product numbers
Complete unit with 6 ft cable Submersible drop cables
The submersible drop cables for SQF pumps are
approved for use in drinking water (KTW approved).
The material of the submersible drop cable is EPR.
The table below shows the maximum length of the
submersible drop cable for the different sizes of cable,
allowing for a 2% power loss.
The table values are calculated on the basis of the
formula:
where
L = Length of cabl e [ft]
∆P = Power loss [%]
V
mp
= Maximum power voltage [V]
Wp = Watt peak [Wp]
ρ = Specific resistance: 8.175 x 10
-6
[Ω in2/ft]
q= Cross-section of submersible drop cable [in
2
]
The sizing tool in WinCAPS makes it possible to calculate the exact losses.
TM02 2217 3901
Pump type Pump size
Product no.
SQF
3 SQF-2 3" 96078027
6 SQF-2 3" 96078028
11 SQF-2 3" 96078029
25 SQF-3 4" 96078042
25 SQF-6 4" 96078043
40 SQF-3 4" 96078044
75 SQF-3 4" 96078139
No. of
50 Wp solar
modules
Power
[Wp]
Max. cable length [ft]
14 AWG 12 AWG 10 AW G 8 AWG
3 150 515 815 1300 2070
4 200 385 610 975 1550
6 300 255 405 650 1035
8 400 190 305 485 775
10 500 155 245 390 6 20
12 600 125 200 325 5 15
14 700 110 175 275 440
16 800 95 150 240 385
18 900 85 135 215 345
20 1000 7 5 120 195 310
The values in the table are based on Grundfos 50 W
solar modules (140 VDC output).
L
∆PqV
mp
×2×
Wp 100 2 ρ×××
--------------------------------------------
ft[]=
35
Product numbers
SQFlex
IO 100
IO 101
CU 200
IO 102
Wind turbine H80 Whisper
Product Product no.
IO 100 96475073
Product Product no.
IO 101 96481502
Product Product no.
CU 200 96467801
Description Product no.
IO 102 breaker box for wind turbine. 96475065
TM02 7886 4403
Description Product no.
Wind turbine H80 Whisper. 96472120
Instructions are included.
Specifications
Rotor diameter: 10 ft
Weight: 65 lb
Mount: pipe
Start-up wind speed: 7 mph.
36
Product numbers
SQFlex
Tower kit for H80 Whisper
Tower installation kit
Tower pipe selection
The tower kit is designed to use 2 ½” pipes .
The following table shows the required thickness of the
pipe(s) depending on the maximum wind speed:
The wall thickness of the gin pole must be 0.060 in o r
greater.
Pieces of pipe needed:
Tower kit, 30 ft
• 1 pipe of 13 ft for tower
• 1 pipe of 17 ft for tower
• 1 pipe of 15 ft for gin pole.
Tower kit, 50 ft
• 2 pipes of 15 ft for tower
• 1 pipe of 20 ft for tower
• 1 pipe of 19 ft for gin pole.
TM02 5582 3502
Description Height Product no.
Tower kit for H80 Whisper 30 ft 96475066
50 ft 96475067
Instructions are included.
Note: The pipes are not included
For tower pipe selection see below.
30 ft
50 ft
40 ft
50 ft
Description Product no.
Tower installation kit. 96475069
Note: The gin pole is not included
For tower pipe selection see below.
Max. wind speed
[mph]
Recommended wall thickness
[in]
75 0.090
90 0.120
110 0.140
37
Accessories
SQFlex
Auger / anchor
Grease
Level switch
TM02 2571 4501
Description Length [in] Product no.
Auger /anchor (4 pcs.) 48 96475068
Description Product no.
Greas e for lubrication of motor shaft. 96037562
TM02 2407 4201
Description Product no.
Level switch. 00010748
High water level: Contact is closed.
Low water level: Contact is open.
38
Further product documentation
In addition to the printed data booklet, Grundfos offers
the following sources of product documentation.
• WinCAPS
• WebCAPS.
WinCAPS
WinCAPS is a Windows-based Computer-Aided
Product Selection program containing information on
more than 90,000 Grundfos products.
Available on CD-ROM in more than 15 languages,
WinCAPS offers
• detailed technical information
• selection of the optimum pump solution
• dimensional drawings of each pump
• detailed service documentation
• installation and operating instructions
• wiring diagrams of each pump.
Fig. 1 WinCAPS CD-ROM
Fig. 2 WinCAPS
cd-wincaps
WinCAPS
Click on Catalogue and
select a product from the
extensive product catalogue.
Click on Sizing and select
the most suitable pump
for your application.
39
Further product documentation
WebCAPS
WebCAPS is a Web-based Computer Aided-Product
Selection program and a web-version of WinCAPS.
Available on Grundfos’ homepage,
www.grundfos.com, WebCAPS offers
• detailed technical information
• dimensional drawings of each pump
• wiring diagrams of each pump.
Fig. 3 WebCAPS
WebCAPS_English
Click Catalogue and
select a product from
the extensive
product catalogue.
Click Replacement
and select the right
replacement pump
based on the
current installation.
Click Product
search and select
a product from the
extensive product
catalogue.
Click Service to
to find information
on service kits and
spare parts.
Click Settings and
select your preferred
language.
Click Literature to
select and download
Grundfos documentation
by browsing the product
ranges or performing
a specific search. The
literature includes:
- Data booklets
- Installation and
- Service etc.
operating manuals
Being a registered
user click Log in to:
- save your settings
- define and save your
own units
- save personalised
information.
Click CAD drawings
to select and download
CAD drawings in:
-.stp
-.dxf
-.dwg
Click on Sizing and select
the most suitable pump
for your application.
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
www.grundfos.com
L-SP-TL-014-03/05
US
Repl. L-SP-TL-014-02/0 4
Subject to alterations.
Being responsible is our foundation
Thinking ahead makes it possible
Innovation is the essence
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