Geotech Geoflo 3 User manual

Rev 10/05/2023 Part # 11200092
Geoflo 3
Installation and Operation Manual

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Table of Contents
Section 1: System Description........................................................................... 3
Applications ................................................................................................................... 3
Section 2: System Installation............................................................................ 4
Preinstallation................................................................................................................ 4
Installation...................................................................................................................... 6
Installing the Pump........................................................................................................ 7
Section 3: System Operation and Assembly.................................................... 8
Electrical Connection..................................................................................................... 9
Cable Sizing................................................................................................................. 11
Splicing the Cable........................................................................................................ 11
Fitting the Cable Guard................................................................................................ 11
Piping........................................................................................................................... 12
Generator Operation.................................................................................................... 12
Starting the Pump for the First Time............................................................................ 12
Assembly of Pump and Motor...................................................................................... 14
Environment................................................................................................................. 14
Section 4: System Maintenance....................................................................... 15
Section 5: System Troubleshooting ................................................................ 16
Instruments Not Allowed.............................................................................................. 17
Checking of Motor and Cable ...................................................................................... 18
Section 6: System Specifications .................................................................... 19
Technical Data............................................................................................................. 19
Disposal....................................................................................................................... 20
Section 7: Parts and Accessories.................................................................... 21
Pumps.......................................................................................................................... 21
Jacketed Tefzel Motor Leads....................................................................................... 22
Jacketed Santoprene Motor Leads.............................................................................. 22
Accessories ................................................................................................................. 22
The Warranty...................................................................................................... 24

2
NOTE
DOCUMENTATION CONVENTIONS
This uses the following conventions to present information:
An exclamation point icon indicates a WARNING of a situation
or condition that could lead to personal injury or death. You
should not proceed until you read and thoroughly understand the
WARNING message.
WARNING
CAUTION
A raised hand icon indicates CAUTION information that relates to
a situation or condition that could lead to equipment malfunction
or damage. You should not proceed until you read and thoroughly
understand the CAUTION message.
A note icon indicates NOTE information. Notes provide additional
or supplementary information about an activity or concept.

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Section 1: System Description
The Geoflo 3 is a three inch diameter deep well submersible 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.
Applications
Typical applications:
• Dissolved Phase Remediation
• Leachate Management
WARNING: This pump has not been investigated for use in swimming
pool or marine areas.

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Section 2: System Installation
Preinstallation
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 Geoflo 3 submersibles makes them resistant to abrasion;
however, no pump made of any material can forever withstand the destructive wear that
occurs when constantly pumping sandy water.
If this pump is used to replace an oil-filled submersible or oil-lubricated line-shaft turbine in
an existing well, the well must be blown or bailed clear of oil.
Choosing 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.
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 installation 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 pumping water of a
maximum 86°F only.
Liquid Temperatures/Cooling
Figure 2-1 shows a Geoflo 3 pump installed in a well. With the pump operating, it
illustrates the following:
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.

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Figure 2-1: Pump Inside Well
Motor Preparation
Geoflo 3 submersible motors have water-lubricated slide bearings. No additional
lubrication is required. The submersible motors are factory-filled with a special motor
liquid, type SML 2 or SML 3, which will protect the motor liquid down to 4°F and prevent

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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.
Refilling of Motor Liquid
If for any reason the motor liquid has
been drained or lost, the motor must be
refilled with Geoflo 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 inclination 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 Figure 2-2.
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.
Installation
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 Figure 2-3.
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.
Figure 2-2: Injecting
Motor Liquid
Figure 2-3: Pump Position

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Installing the Pump
Installation Depth
The dynamic water level should always be
above the pump, see Figure 2-4.
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
Procedure
To install the pump, proceed as follows:
1. Attach the enclosed data plate sticker at the wellhead.
2. Check the well for proper clearance. The well must be at least 3 inches in
diameter.
3. It is a good idea to check the well for clearance using a plumb ring (2.95 ø x 10
in.).
4. Attach the first section of the riser pipe to the pump. 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.
Figure 2-4: Installation Depth

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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.

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Section 3: System Operation and Assembly
Electrical Connection
General
The electrical connection should be carried out by an authorized electrician in accordance
with local regulations.
WARNING:
Before starting work on the pump, make sure that the electricity supply
has been switched off and that it cannot be accidentally switched on.
This pump is a permanent wiring connection only.
Reduced risk of electric shock during the operation of this pump requires the provision 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 external main
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.
The supply voltage, rated maximum current and power factor (PF) appear on the motor
nameplate. The required voltage for Geoflo submersible motors, measured at the motor
terminals, is –10%/+6% of the nominal voltage during continuous operation (including
variation in the supply voltage and losses in cables). If the pump is connected to an
installation where a Ground Fault circuit breaker (GFI) is used as additional 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 Geoflo 3 pumps can be connected to a CU 300 control box.
Motor Protection
The motor has built-in automatic thermal overload protection and requires no additional
motor protection.
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 Figure 3-1 and Figure 3-2.
NOTE: The pressure switch must be rated for the maximum amps of the
specific pump.

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WARNING:
Reduced risk of electric shock during operation of this pump requires the
provision 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.
Figure 3-1: Wiring Diagram for 2-wire Geoflo Motors (200-240 V)
Figure 3-2: Wiring Diagram for Geoflo Motors (100-115 V)

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Cable Sizing
Single-phase 60 Hz maximum cable length motor service to entrance:
Motor Rating
Max lengths of copper wire in feet (9% voltage drop)
Volts
HP
Amps
14AWG
12AWG
10AWG
8AWG
6AWG
4AWG
2AWG
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
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 Geoflo 3 and the CU 300 control box = 650 ft.
Splicing the Cable
The submersible drop cable can be ordered separately in lengths of 25 to 300 ft., see
Section 7: Parts and Accessories
The submersible drop cable supplied with Geoflo 3 pumps is a 12 AWG ETFE cable with
plug. It is not recommended to splice this type of cable.
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 Figure 3-3.
3. Fasten the cable guard to the pump suction strainer with the two self-tapping
screws supplied, see Figure 3-4.
Figure 3-3: Placing the Cable Guard
Figure 3-4: Fitting the
Cable Guard to the Pump
Suction Strainer

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Piping
The pump should only be gripped by the two flats at the top of the pump, see Figure 3-5.
The pump can be installed vertically or horizontally. 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 Figure 2-4. The threaded joints must be well cut and fit together
tightly to ensure that they do not work loose.
Figure 3-5: Gripping the Pump
Generator Operation
It is safe to operate the Geoflo 3 with a generator. The generator must be sized 50%
above the P1 (input power) values of the pump. See the following table.
Motor
HP
Minimum generator size
W
Recommended generator output
W
0.5
1200
1500
0.75
1900
2500
1.0
2600
3200
1.5
2800
3500
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 approximately 2 seconds to develop full pressure.
Motor Cooling and Other Considerations
Make sure the well is capable of yielding a minimum quantity of water corresponding to
the pump capacity. Do not start the pump until it is completely submerged in the liquid. As
the valve is being opened, the drawdown should be checked to ensure that the pump
always remains submerged. 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.

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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.
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 discharge valve for more
than 5 minutes. When the discharge valve is closed, there is no cooling
flow and there is a risk of overheating in the motor and pump.
Built-in Functions
The motor incorporates an electronic unit which functions as follows:
1. In case of overload, the built-in overload protection will stop the pump for 5
minutes. After that period, the pump will attempt to restart.
2. If the pump has been stopped as a result of dry running, it will start automatically
after 5 minutes.
3. If the pump is restarted and the well has not recovered, the pump will stop after
30 seconds.
Resetting the Pump
Switch off the electricity supply for 1 minute.
Geoflo 3 Motors
NOTE: All Geoflo 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 CU 300
manual for instructions on this procedure.

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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. 3-7.
2. Pull the pump shaft out to the position shown in fig. 3-6.
3. Grease the motor shaft end with the grease supplied with the motor.
Screw the pump end on the motor (55 Nm). Note: The pump shaft must engage
with the motor shaft.
4. A spanner may be used on the clamping faces of the pump end, see fig. 3-7.
5. Fit the cable guard as described in section 3.
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.
Environment
During handling, operation, storage and transport, all environment regulations dealing with
the handling of hazardous materials must be observed.
WARNING:
When the pump is taken out of operation, it must be ensured that no
hazardous material is left in the pump and in the riser pipe, which can be
injurious to persons and the environment.
Figure 3-6: Pump Shaft Position
Figure 3-7: Pump in Vice

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Section 4: System Maintenance
The pumps are normally maintenance-free. Deposits and wear may occur. For that
purpose, service kits and service tools are available from Geotech. The pumps can be
serviced at a Geotech service center.

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Section 5: System 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 the 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
anticipated.
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 partially
closed/blocked.
Check and clean or replace the
valves as necessary.
c) The discharge pipe is
partially 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 partially 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.

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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
intervals 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.
Instruments Not Allowed
NOTE: The use of the following instruments is not allowed during
troubleshooting.
Insulation Test
Resistance Test
High-voltage Test
NOTE: When measuring, use RMS instruments.
Figure 5-1: Instruments Not Allowed

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Checking of Motor and Cable
1. Supply voltage
Measure the voltage L1
(RMS) between phase and
L2.
Connect the voltmeter to
the terminals at the
connections.
The voltage should, when the
motor is loaded, be within the
range specified under
Electrical Connection in
Section 3: System Operation
and Assembly.
Large variations in supply
voltage indicate poor electricity
supply, and the pump should
be stopped until the problem
has been corrected.
2. Current consumption
Measure the current
(RMS) while the pump is
operating at a constant
discharge head (if
possible, at the capacity
where the motor is most
heavily loaded).
For maximum current, see
motor nameplate.
If the current exceeds the full-
load current, there are the
following possible faults:
Poor connection in the
leads, possibly in the cable
joint.
Too low supply voltage, see
item 1.