Grundfos SQ Series Bedienungsanleitung

SQ, SQE

GRUNDFOS INSTRUCTIONS

Installation and operating instructions

LIMITED WARRANTY

Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are

warranted to the original user only to be free of defects in material and workmanship

for a period of 24 months from date of installation, but not morethan 30 monthsfrom

date of manufacture. Grundfos' liability under this warranty shall be limited to repair-

ing or replacing at Grundfos' option, without charge, F.O.B. Grundfos' factory or

authorized service station, any product of Grundfos' manufacture. Grundfos will not

be liable for any costs of removal, installation, transportation, or any other charges

which may arise in connection with a warranty claim. Products which are sold but

not manufactured by Grundfos are subject to the warranty provided by the manu-

facturer of said products and not by Grundfos' warranty. Grundfos will not be liable

for damage or wear to products caused by abnormal operating conditions, accident,

abuse, misuse, unauthorized alteration or repair, or if the product was not installed

in accordance with Grundfos' printed installation and operating instructions.

To obtain service under this warranty, the defective product must be returned to the

distributor or dealer of Grundfos' products from which it was purchased together

with proof of purchase and installation date, failure date, and supporting installation

data. Unless otherwise provided, the distributor or dealer will contact Grundfos or

an authorized service station for instructions. Any defective product to be returned

to Grundfos or a service station must be sent freight prepaid; documentation sup-

porting the warranty claim and/or a Return Material Authorization must be included

if so instructed.

GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUEN-

TIAL DAMAGES, LOSSES, OR EXPENSES ARISING FROM INSTALLATION,

USE, OR ANY OTHER CAUSES. THERE ARE NO EXPRESS OR IMPLIED WAR-

RANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE, WHICH EXTEND BEYOND THOSE WARRANTIES DESCRIBED OR

REFERRED TO ABOVE.

Some jurisdictions do not allow the exclusion or limitation of incidental or conse-

quential damages and some jurisdictions do not allow limit actions on how long

implied warranties may last. Therefore, the above limitations or exclusions may not

apply to you. This warranty gives you specific legal rights and you may also have

other rights which vary from jurisdiction to jurisdiction.

SQ, SQE

Installation and operating instructions 4

Notice d’installation et d’entretien 13

Instrucciones de instalación y funcionamiento 24

CONTENTS Page

1. General description 4

1.1 Applications 4

2. Preinstallation 4

2.1 Well preparation 4

2.2 Make sure you have the right pump 4

2.3 Pumped liquid requirements 4

2.4 Liquid temperatures/cooling 4

2.5 Motor preparation 5

2.6 Refilling of motor liquid 5

3. Installation positions 5

3.1 Positional requirements 5

4. Electrical connection 6

4.1 General 6

4.2 Motor protection 6

4.3 Connection of motor 6

5. Cable sizing 7

6. Splicing the cable 7

7. Fitting the cable guard 7

8. Piping 7

9. Installing the pump 8

9.1 Installation depth 8

10. Generator operation 8

11. Starting the pump for the first time 8

11.1 Motor cooling and other considerations 8

11.2 Impurities in the water 9

11.3 Minimum flow rate 9

11.4 Built-in functions 9

11.5 Resetting the pump 9

11.6 MS 3 motors 9

11.7 MSE 3 motors 9

11.8 Maintenance and service 9

12. Assembly of pump and motor 9

13. Troubleshooting 10

13.1 Instruments not allowed 11

14. Checking of motor and cable 11

15. Environment 11

16. Technical data 12

17. Disposal 12

1. General description

The SQ/SQE is a 3 inch diameter deep well sub-

mersible pump mainly designed for the pumping of

raw water in domestic water supply.

This manual is designed to assist in the proper set-

up, installation and operation of these pumps.

1.1 Applications

Typical applications:

• residential housing

• small waterworks

• pressure boosting

• liquid transfer in tanks

• irrigation systems.

WARNING: This pump has not been investigated for

use in swimming pool or marine areas.

2. Preinstallation

2.1 Well preparation

If the pump is to be installed in a new well, the well

should be fully developed and bailed or blown free of

cuttings and sand.

The construction of the Grundfos SQ/SQE submersi-

bles makes them resistant to abrasion; however, no

pump made of any material can forever withstand the

destructive wear that occurs when constantly pump-

ing sandy water.

If this pump is used to replace an oil-filled submers-

ible or oil-lubricated line-shaft turbine in an existing

well, the well must be blown or bailed clear of oil.

2.2 Make sure you have the right pump

Determine the maximum depth of the well and the

drawdown level at the maximum pump capacity.

Pump selection and setting depth should be made

based on this data.

2.3 Pumped liquid requirements

Submersible well pumps are designed for pumping

clear, cold water; free of air or gases. Decreased

pump performance and life expectancy can occur if

the water is not clear, cold or contains air or gases.

A check should be made to ensure that the installa-

tion depth of the pump will always be at least three

feet below the maximum drawdown level of the well.

The bottom of the motor should never be installed

lower than the top of the well screen or within five

feet of the well bottom.

CAUTION: This pump has been approved for pump-

ing maximum 86°F water only.

2.4 Liquid temperatures/cooling

Figure 1 shows an SQ/SQE pump installed in a well.

With the pump operating, figure 1 illustrates the fol-

lowing:

• Well diameter

• Pump diameter

• Temperature of pumped liquid

• Flow past the motor to the pump suction strainer.

Note: The well diameter must be at least 3 inches.

If there is a risk that the motor will be covered with

sediment, it is recommended the pump be placed in

a flow sleeve. The motor should always be installed

above the well screen.

WARNING:

Prior to installation, read these installation

and operating instructions. Installation and

operation must comply with local regula-

tions and accepted codes of good prac-

tice.

Fig. 1 Pump installed in well

2.5 Motor preparation

Grundfos MS 3 and MSE 3 submersible motors have

water-lubricated slide bearings. No additional lubri-

cation is required.

The submersible motors are factory-filled with a spe-

cial Grundfos motor liquid, type SML 2 or SML 3,

which will protect the motor liquid down to 4°F

(–20°C) and prevent the growth of bacteria. The

level of motor liquid is important for the operating life

of the bearings and consequently the life of the

motor.

2.6 Refilling of motor liquid

If for any reason the motor liquid has been drained or

lost, the motor must be refilled with Grundfos motor

liquid SML 2 or SML 3.

To refill the motor, proceed as follows:

1. Remove the cable guard and separate the pump

end from the motor.

2. Place the motor in vertical position with an incli-

nation of approximately 10°.

3. Remove the filling plug using a screwdriver or a

similar tool.

4. Inject motor liquid into the motor with a filling

syringe or similar tool, see fig. 2.

5. To allow possible air to escape, move the motor

from side to side and turn the shaft.

6. Replace the filling plug and make sure it is tight.

7. Assemble pump end and motor.

8. Fit the cable guard.

The pump is now ready for installation.

Fig. 2 Injecting motor liquid

3. Installation positions

3.1 Positional requirements

The pump is suitable for vertical as well as horizontal

installation, however, the pump shaft must never fall

below the horizontal plane, see fig. 3.

If the pump is to be installed horizontally, e.g. in a

tank, and there is a risk that the pump might be

covered by mud, it must be installed in a flow sleeve.

Fig. 3 Pump position

TM01 0518 1297

Well

diameter

Pump

diameter

Liquid

temperature,

max. 86°F

TM02 9606 3504TM01 1375 4397

Allowed

Not allowed

4. Electrical connection

4.1 General

The electrical connection should be carried out by

an authorized electrician in accordance with local

regulations.

The supply voltage, rated maximum current and

power factor (PF) appear on the motor nameplate.

The required voltage for Grundfos submersible MS 3

and MSE 3 motors, measured at the motor terminals,

is –10%/+6% of the nominal voltage during continu-

ous operation (including variation in the supply volt-

age and losses in cables).

If the pump is connected to an installation where a

Ground Fault circuit breaker (GFI) is used as addi-

tional protection, this circuit breaker must trip out

when ground fault currents with DC content

(pulsating DC) occur.

Supply voltage

1 x 100-115 V or 1 x 200-240 V, 50/60 Hz.

The current consumption can only be measured

accurately by means of a true RMS instrument.

If other instruments are used, the value measured

will differ from the actual value.

The SQE pumps can be connected to a CU 300 or

CU 301 control box.

4.2 Motor protection

The motor has built-in automatic thermal overload

protection and requires no additional motor protec-

tion.

4.3 Connection of motor

The motor can be connected directly to the main

circuit breaker.

Start/stop of the pump will typically be done via a

pressure switch, see figs. 4 and 5.

Note: The pressure switch must be rated for the

maximum amps of the specific pump.

Fig. 4 Wiring diagram for 2-wire Grundfos

motors (200-240 V)

Fig. 5 Wiring diagram for single-phase Grundfos

motors (100-115 V)

WARNING:

Before starting work on the pump, make

sure that the electricity supply has been

switched off and that it cannot be acciden-

tally switched on.

This pump is permanent wiring connection

only.

Reduced risk of electric shock during

operation of this pump requires the provi-

sion of acceptable grounding.

The grounding connection must be made

by a copper conductor, at least the size of

the circuit conductors supplying the pump.

The pump must be connected to an exter-

nal mains switch.

The pump must never be connected to a

capacitor or to another type of control box

than CU 300 or CU 301.

The pump must never be connected to an

external frequency converter.

WARNING:

Reduced risk of electric shock during

operation of this pump requires the provi-

sion of acceptable grounding. If the means

of connection to the supply connected box

is other than grounded metal conduit,

ground the pump back to the service by

connecting a copper conductor, at least

the size of the circuit conductors supplying

the pump.

TM02 8736 0804TM02 8736 0804

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Quickdisconnection

Pressure

switch Black

Black

Green

Pump and motor

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Quick disconnection

Pressure

switch Black

White or grey

Green

Pump and motor

5. Cable sizing

Single-phase 60 Hz maximum cable length motor service to entrance:

Note: The values apply to 230 V, 60 Hz, and conform to the requirements stated in the National Electrical

Code Book.

Note: Recommended maximum cable length between the SQE and the CU 300 or CU 301 control box = 650 ft.

6. Splicing the cable

Splice the drop cable with the motor cable.

The splice must be made carefully.

It is recommended to use a third-party-approved

watertight junction box or splice connection.

7. Fitting the cable guard

To fit the cable guard, proceed as follows:

1. Make sure that the motor lead lies flat in the

cable guard.

2. Place the cable guard in the groove in the cable

plug. The two flaps must engage with the upper

edge of the pump sleeve, see fig. 6.

Fig. 6 Placing the cable guard

3. Fasten the cable guard to the pump suction

strainer with the two self-tapping screws sup-

plied, see fig. 7.

Fig. 7 Fitting the cable guard to the pump

suction strainer

8. Piping

• The pump should only be gripped by the two flats

at the top of the pump, see fig. 8.

• The pump can be installed vertically or horizon-

tally. During operation, the pump must always be

completely submerged in water.

• When plastic pipe is used, a stainless-steel safety

wire is recommended for lowering and lifting the

pump. Fasten the wire to the eyelet on the pump,

see fig. 9.

• The threaded joints must be well cut and fit

together tightly to ensure that they do not work

loose.

Fig. 8 Gripping the pump

Motor rating Maximum lengths of copper wire in feet (9% voltage drop)

Volts hp amps 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG 2 AWG

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 1.0 11.2 300 460 770 1190 1890 2980 4850

230 1.5 12 280 430 720 1110 1760 2780 4530

TM02 9613 3504

TM01 4427 0299TM02 8739 0804

9. Installing the pump

9.1 Installation depth

The dynamic water level should always be above

the pump, see fig. 9.

A = Dynamic water level

B = Static water level

C = Minimum 3 inch well diameter

D = Drawdown

E = Installation depth below static water level.

Maximum 500 feet.

Fig. 9 Installation depth

Procedure

To install the pump, proceed as follows:

1. Attach the enclosed data plate sticker at the well

head.

2. Check the well for proper clearance. The well

must be at least 3 inches in diameter.

It is a good idea to check the well for clearance

using a plumb ring (2.95 ø x 10 in.).

3. Attach the first section of riser pipe to the pump.

4. Lower the pump into the well. Make sure the

motor cable is not damaged when the pump is

lifted or lowered into the well, especially in 3 inch

wells.

Note: Do not lower or lift the pump using the

motor cable.

5. When the pump has been installed to the

required depth, the installation should be finished

by means of a well seal.

Note that the dynamic water level should always

be above the pump.

6. Loosen the safety wire so that it becomes

unloaded and lock it to the well seal using a cable

clamp.

7. Complete the electrical connections.

Note: The pump must never be connected to a

capacitor or to another type of control box than

CU 300 or CU 301.

Installation depths

Maximum installation depth:

500 feet below the static water level.

Minimum installation depth:

1.75 feet below the dynamic water level.

Vertical installation

During start-up and operation, the pump must always

be completely submerged in water.

Horizontal installation

The pump must be installed at least 1.75 feet below

the dynamic water level.

If there is a risk that the pump might be covered by

mud, the pump must always be placed in a flow

sleeve.

Note: Do not lower or lift the pump using the motor

cable.

10. Generator operation

It is safe to operate the SQ/SQE with a generator.

The generator must be sized 50% above the P1

(input power) values of the pump. See the following

table.

11. Starting the pump for the first time

When the pump has been connected correctly, the

pump should be started with the discharge valve

closed approximately one third.

Due to the soft start feature, the pump takes approxi-

mately 2 seconds to develop full pressure.

11.1 Motor cooling and

other considerations

• Make sure the well is capable of yielding a mini-

mum quantity of water corresponding to the pump

capacity.

• Do not start the pump until it is completely sub-

merged in the liquid.

• As the valve is being opened, the drawdown

should be checked to ensure that the pump

always remains submerged.

TM02 8740 0804

Motor

[hp]

Min.

generator size

[W]

Recommended

generator

output [W]

0.5 1200 1500

0.75 1900 2500

1.0 2600 3200

1.5 2800 3500

• To ensure the necessary cooling of the motor, the

pump should never be set so low that it gives no

water.

If the flow rate suddenly falls, the reason might be

that the pump is pumping more water than the well

can yield. The pump must immediately be stopped

and the fault corrected.

11.2 Impurities in the water

If there are impurities in the water, the valve should

be opened gradually as the water becomes clearer.

The pump should not be stopped until the water is

clean, otherwise the pump parts and the check valve

may become clogged.

When the water is clean, the valve should be fully

opened.

11.3 Minimum flow rate

To ensure the necessary cooling of the motor, the

pump flow rate should never be set to a value lower

than 0.2 gpm.

If the flow rate suddenly falls, the reason might be

that the pump is pumping more water than the well

can yield. The pump must immediately be stopped

and the fault corrected.

WARNING: The pump's dry-running protection is

effective only within the recommended duty range of

the pump.

Note: Do not let the pump run against a closed dis-

charge valve for more than 5 minutes. When the dis-

charge valve is closed, there is no cooling flow and

there is a risk of overheating in motor and pump.

11.4 Built-in functions

The motor incorporates an electronic unit which

functions as follows:

• In case of overload, the built-in overload protec-

tion will stop the pump for 5 minutes. After that

period, the pump will attempt to restart.

• If the pump has been stopped as a result of dry

running, it will start automatically after 5 minutes.

• If the pump is restarted and the well has not

recovered, the pump will stop after 30 seconds.

11.5 Resetting the pump

Switch off the electricity supply for 1 minute.

11.6 MS 3 motors

Note: All MS 3 motors are factory-set to detect dry-

running conditions.

Check that the combination of pump and motor cor-

responds to the data on page 35.

11.7 MSE 3 motors

Note: All MSE 3 motors are factory-set to detect dry-

running conditions. However, if the maximum pump

speed setting is changed, the dry-running stop value

must also be changed. Please refer to either the

CU 300 or CU 301 I&O for instructions on this proce-

dure.

11.8 Maintenance and service

The pumps are normally maintenance-free.

Deposits and wear may occur.

For that purpose, service kits and service tools are

available from Grundfos.

The pumps can be serviced at a Grundfos service

center.

12. Assembly of pump and motor

To assemble pump end and motor, proceed as

follows:

1. Place the motor horizontally in a vice and tighten

it, see fig. 11.

2. Pull the pump shaft out to the position shown in

fig. 10.

Fig. 10 Pump shaft position

3. Grease the motor shaft end with the grease

supplied with the motor.

4. Screw the pump end on the motor (55 Nm).

Note: The pump shaft must engage with the

motor shaft.

A spanner may be used on the clamping faces of

the pump end, see fig. 11.

5. Fit the cable guard as described in section 7.

Fig. 11 Pump in vice

0.5 hp: L = 4.7".

0.75 hp: L = 4.0".

1.0 hp: L = 2.6".

1.5 hp: L = 2.6".

When pump end and motor have been assembled

correctly, there must be no clearance between pump

end and motor.

To disassemble, reverse procedure.

TM02 8425 5203

TM01 2854 3804

Use pump vice here

6.14"

13. Troubleshooting

Fault Cause Remedy

1. The pump does

not run. a) The fuses are blown. Replace the blown fuses. If the new fuses

blow too, check the electrical installation

and the drop cable.

b) The GFI circuit breaker has tripped. Reset the circuit breaker.

c) No electricity supply. Contact the electricity provider.

d) The motor protection has cut off the

electricity supply due to overload. Check for motor/pump blockage.

e) The drop cable is defective. Repair or replace the pump/cable.

f) Overvoltage has occurred. Check the electricity supply.

2. The pump runs but

gives no water. a) The discharge valve is closed. Open the valve.

b) No water or too low water level in

well. Increase the installation depth of the pump,

throttle the pump or replace it with a smaller

capacity model.

c) The check valve is stuck in its

closed position. Pull the pump and clean or replace the

valve.

d) The suction strainer is closed. Pull the pump and clean the strainer.

e) The pump is defective. Repair or replace the pump.

3. The pump runs at

reduced capacity. a) The drawdown is larger than antici-

pated. Increase the installation depth of the pump,

throttle the pump or replace it with a smaller

capacity model.

b) The valves in the discharge pipe are

partly closed/blocked. Check and clean or replace the valves as

necessary.

c) The discharge pipe is partly choked

by impurities (iron bacteria). Clean or replace the discharge pipe.

d) The check valve of the pump is

blocked. Pull the pump and clean or replace the

valve.

e) The pump and the riser pipe are

partly choked by impurities

(iron bacteria).

Pull the pump. Check and clean or replace

the pump, if necessary. Clean the pipes.

f) The pump is defective. Repair or replace the pump.

g) Hole in discharge pipe. Check and repair the piping.

h) The riser pipe is defective. Replace the riser pipe.

i) Undervoltage has occurred. Check the electricity supply.

4. Frequent starts

and stops. a) The differential of the pressure

switch between the start and stop

pressures is too small.

Increase the differential. However, the stop

pressure must not exceed the operating

pressure of the pressure tank and the start

pressure should be high enough to ensure

sufficient water supply.

b) The water level electrodes or level

switches in the reservoir have not

been installed correctly.

Adjust the intervals of the electrodes/level

switches to ensure suitable time between

the cutting-in and cutting-out of the pump.

See installation and operating instructions

for the automatic devices used. If the inter-

vals between start/stop cannot be changed

via the automatics, the pump capacity may

be reduced by throttling the discharge

valve.

c) The check valve is leaking or stuck

half-open. Pull the pump and clean or replace the

check valve.

d) The supply voltage is unstable. Check the electricity supply.

e) The motor temperature is too high. Check the water temperature.

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