TapFlo SPT Series Operation instructions

Pump models:
SPT2F-02P
SPT2F-04P
SPT2F-07P
IOM manual
SPT series
Submersible Sewage Pumps
Original Instruction
2022 | 1
Read this instruction manual carefully,
before you install and operate the pump

CONTENTS
IOM manual –SPT series 2
0. GENERAL ............................................................................................................................................................ 5
0.1. INTRODUCTION...............................................................................................................................................................5
0.2. SAFETY SYMBOLS AND TERMINOLOGY..........................................................................................................................5
0.3. SAFETY .............................................................................................................................................................................6
0.4. USER SAFETY....................................................................................................................................................................6
0.5. ENVIRONMENTAL SAFETY...............................................................................................................................................7
0.6. QUALIFICATION AND TRAINING OF PERSONNEL..........................................................................................................7
1. PRODUCT DESCRIPTION ..................................................................................................................................... 8
1.1. INTENDED USE.................................................................................................................................................................8
1.2. PUMP DESIGN..................................................................................................................................................................8
1.3. TECHNICAL DATA ............................................................................................................................................................8
1.4. DIMENSIONS AND WEIGHT............................................................................................................................................9
1.5. PUMP CURVES .................................................................................................................................................................9
1.6. PUMP NAMEPLATE........................................................................................................................................................10
1.7. PUMP PARTS NAMES ....................................................................................................................................................10
1.8. FLOAT SWITCH FUNCTION............................................................................................................................................10
2. PRIOR TO USE....................................................................................................................................................11
2.1. RECEIVING INSPECTION................................................................................................................................................11
2.2. SPECIFICATION INSPECTION.........................................................................................................................................11
2.3. LIFTING AND TRANSPORTATION..................................................................................................................................11
2.4. STORAGE........................................................................................................................................................................11
3. INSTALLATION...................................................................................................................................................12
3.1. PRECAUTIONS................................................................................................................................................................12
3.2. MAXIMUM ALLOWABLE OPERATING PRESSURE AND MAXIMUM IMMERSION DEPTH............................................12
3.3. PREPARATION FOR INSTALLATION ..............................................................................................................................13
3.4. PUMP INSTALLATION....................................................................................................................................................13
3.5. ELECTRICAL CONNECTIONS..........................................................................................................................................14
3.6. GROUNDING..................................................................................................................................................................15
3.7. CABLE CONNECTION.....................................................................................................................................................15
4. OPERATION.......................................................................................................................................................18
4.1. PRECAUTIONS................................................................................................................................................................18
4.2. BEFORE OPERATION......................................................................................................................................................18
4.3. TRIAL OPERATION .........................................................................................................................................................19
4.4. OPERATION ...................................................................................................................................................................20
4.5. MOTOR PROTECTION ...................................................................................................................................................20
4.6. WATER LEVEL DURING OPERATION .............................................................................................................................21
5. MAINTENANCE AND INSPECTION......................................................................................................................22
5.1. P RECAUTIONS ..............................................................................................................................................................22
5.2. INSPECTION AND SERVICE INTERVALS.........................................................................................................................22
5.3. STORAGE AFTER OPERATION........................................................................................................................................23
5.4. OIL INSPECTION AND CHANGE....................................................................................................................................23

CONTENTS
IOM manual –SPT series 3
5.5. DISASSEMBLY AND REASSEMBLY PROCEDURE ...........................................................................................................24
5.5.1. Disassembly procedure........................................................................................................................... 24
5.5.2. Exploded view ......................................................................................................................................... 25
5.5.3. Parts list .................................................................................................................................................. 25
5.5.4. Reassembly procedure............................................................................................................................ 26
5.5.5. Wearing parts replacement condition ................................................................................................. 26
5.6. HOW TO ORDER SPARE PARTS.....................................................................................................................................26
6. TROUBLE SHOOTING .........................................................................................................................................27
7. WARRANTY .......................................................................................................................................................29
7.1. WARRANTY FORM ........................................................................................................................................................29
7.2. RETURNING PARTS........................................................................................................................................................30
7.3. WARRANTY....................................................................................................................................................................30

EU DECLARATION OF CONFORMITY 01/EU/SUB/2022
Series:
SG…; SPT…; SK…; SF…; SFA…; SB…; SBA…
Manufactured for:
Tapflo AB
Filaregatan 4
442 34 Kungälv, Sweden
This declaration of conformity is issued under the sole responsibility of the manufacturer.
Object of declaration: SUBMERSIBLE SINGLE-STAGE CENTRIFUGAL PUMPS
The object of the declaration described above is in conformity with the relevant Union
harmonisation legislation:
•Directive 2006/42/EC of European Parliament and of the Council of 17 May 2006 on machinery,
amending Directive 95/16/EC;
•Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the
harmonisation of the laws of the Member States relating to electromagnetic compatibility
(recast);
•Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market
of electrical equipment designed for use within certain voltage limits;
Mr Michał Śmigiel is authorized to compile the technical file.
Tapflo Sp. z o.o.
ul. Czatkowska 4b
83-110 Tczew
Signed for and on behalf of Tapflo AB
Håkan Ekstrand
Managing director
Kungälv, 14.02.2022

0. GENERAL
IOM manual –SPT series 5
0. General
0.1. Introduction
The purpose of this manual is to provide necessary information for:
➢Installation
➢Operation
➢Maintenance
WARNING: Read this manual carefully before installing and using the product. Improper use
of the product can cause death, personal injury and damage to property and may void the
warranty.
NOTICE:
Save this manual for future reference and keep it readily available at the location of the unit.
0.2. Safety symbols and terminology
It is extremely important that you read, understand, and follow the safety messages and
regulations carefully before handling the product. They are published to help prevent these
hazards:
➢Personal accidents and health problems
➢Damage to the product
➢Product malfunction
Hazard levels
Hazard level
Indication
DANGER
A hazardous situation which, if not avoided, will result in death or serious
injury
WARNING
A hazardous situation which, if not avoided, could result in death or serious
injury
CAUTION
A hazardous situation which, if not avoided, could result in minor or
moderate injury
NOTICE:
A potential situation which, if not avoided, could result in undesirable
conditions. A practice not related to personal injury.
Hazard categories
Hazard categories can either fall under hazard levels or let specific symbols replace the ordinary
hazard level symbols. Electrical hazards are indicated by the following specific symbol:

0. GENERAL
IOM manual –SPT series 6
Electrical hazard:
These are examples of other categories that can occur. They fall under the ordinary hazard
levels and may use complementing symbols:
➢Crush hazard
➢Cutting hazard
➢Arc flash hazard
0.3. Safety
WARNING:
➢The operator must be aware of safety precautions to prevent physical injury.
➢Pump must not be used if people are in water
➢Leakage of pump lubricants may cause water pollution
➢Proper plug must be provided according to local and national standards
➢Never operate the pump suspended in air. The recoil may result in serious injury or
death
➢Do not use the pump in explosion hazard zones.
➢Any pressure-containing device can explode, rupture, or discharge its contents if it is
over-pressurized. Take all necessary measures to avoid over-pressurization.
➢Operating, installing, or maintaining the unit in any way that is not covered in this
manual could cause death, serious personal injury, or damage to the equipment. This
includes any modification to the equipment or use of parts not provided by the
manufacturer. If there is a question regarding the intended use of the equipment,
please contact the manufacturer representative before proceeding.
➢This manual clearly identifies accepted methods for disassembling units. These
methods must be adhered to. Trapped liquid can rapidly expand and result in a violent
explosion and injury. Never apply heat to impellers, propellers, or their retaining
devices to aid in their removal.
➢Do not change the service application without the approval of an authorized Tapflo
representative.
➢In case any instructions in this manual are unclear or any information is lacking, please
contact Tapflo before handling the pump.
CAUTION: You must observe the instructions contained in this manual. Failure to do so could
result in physical injury, damage, or delays
0.4. User safety
General safety rules
These safety rules apply:
➢Always keep the work area clean.
➢Pay attention to the risks presented by gas and vapours in the work area.
➢Avoid all electrical dangers. Pay attention to the risks of electric shock or arc flash
hazards.
➢Always bear in mind the risk of drowning, electrical accidents, and burn injuries.
NOTICE: Never operate a unit unless safety devices are installed. Also see specific information
about safety devices in other chapters of this manual.

0. GENERAL
IOM manual –SPT series 7
Electrical connections
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local regulations. For more information about requirements,
see sections dealing specifically with electrical connections.
Hazardous liquids
Pumps are designed for pumping liquids that can be hazard to your health. In the event of
contact with the liquid follow national and local safety rules or MSDS (material safety
datasheet).
0.5. Environmental safety
The work area
Always keep the station clean to spot oil leakage and avoid oil pollution.
Waste and emissions regulations
Observe these safety regulations regarding waste and emissions:
➢Dispose appropriately of all waste.
➢Handle and dispose of the processed liquid in compliance with applicable
environmental regulations.
➢Clean all leakages in accordance with safety and environmental procedures.
➢Report all environmental pollution to the appropriate authorities.
Electrical installation
For electrical installation recycling requirements, consult your local electric utility.
Recycling guidelines
Always recycle according to the guidelines listed below:
➢Follow local laws and regulations regarding recycling if the pump or parts are accepted
by an authorized recycling company.
➢If the first guideline is not applicable, then return the unit or parts to the nearest the
Tapflo representative.
0.6. Qualification and training of personnel
The personnel in charge of installation, operation and maintenance of the pumps we produce
must be qualified to carry out the operations described in this manual. Tapflo shall not be held
responsible for the training level of personnel and for the fact that they are not fully aware of
the contents of this manual.

1. PRODUCT DESCRIPTION
IOM manual –SPT series 8
1. Product description
1.1. Intended use
The pumps are intended to operate either completely or partially submerged in the pumped
liquid. The pumps are constructed for particular applications. Do not use the pump on
applications different from that for which it was sold without consulting us to ascertain its
suitability.
WARNING:
➢The pumps are not allowed to operate in explosive environments and used for
pumping flammable liquids.
➢Do not use the pump for corrosive liquid.
1.2. Pump design
Fluid
Type
Water with solids; PH: 4-10
temperature
0 to 40oC
Pump
Type
Submersible
Impeller
Vortex (PPO)
Casing
ABS
Shaft seal
Double mechanical seal (Ceramic-SiC/Carbon-Ceramic)
Bearing
Sealed ball bearing
Motor
Type
Dry type submersible induction motor
Poles
2
Voltage
220 V ±5% continuous operation; ±10% intermittent operation
Frequency
50 Hz
Insulation
Class F
Motor protection
Circle thermal protector (build-in)
Lubricant
Turbine oil VG32
Sealings
O-rings
NBR
Gaskets
NBR
Max allowable pressure
See chapter 3.2 maximum allowable operating pressure
Discharge connection
Hose coupling / BSPP female thread
1.3. Technical data
Model
Motor
power
Rated
current
Rated capacity
Rated
head
Max capacity
Max
head
Impeller
passage
kW
A
m3/h
l/min
m
m3/h
l/min
m
mm
SPT2F-02P
0.25
2
7.8
130
5
12
200
7.5
35
SPT2F-04P
0.4
3
9
150
6
16.8
280
9.5
35
SPT2F-07P
0.75
5
12
200
9
22.2
370
13.5
35

1. PRODUCT DESCRIPTION
IOM manual –SPT series 9
1.4. Dimensions and weight
Model
Height
(H)
Width
(W)
Weight
(net)
Outlet
(ød)
Outlet
(ød)*
mm
mm
kg
mm
in
SPT2F-02P
370
234
9
40
1.5
SPT2F-04P
370
234
10
50
2
SPT2F-07P
400
234
13
50
2
*pump is assembled with hose connection but there is BSPP
female thread adapter beneth.
1.5. Pump curves

1. PRODUCT DESCRIPTION
IOM manual –SPT series 10
1.6. Pump nameplate
No.
Description
No.
Description
1
Serial numer
8
Weight
2
Pump model
9
No of phases
3
Max capacity
10
Power
4
Max head
11
Voltage
5
Max temperature
12
Rated current
6
Max immersion
depth
13
Frequency
7
Insulation class
14
Motor speed
1.7. Pump parts names
NOTICE:
This is a general drawing showing a typical model. The external
appearance and the internal construction may vary depending
on particular model.
1.8. Float switch function
Pumps are equipped with float switch, which automatically maintain minimum liquid level. In
order to start the pump, float requires to be on certain, raised position. When liquid level goes
down, float follows it, switching off the pump circuit, when reaching certain level.
2
1
3
4
5
6
7
8
9
10
11
12
13
14

2. PRIOR TO USE
IOM manual –SPT series 11
2. Prior to use
2.1. Receiving inspection
Although precaution is taken by us when packing and shipping, we urge you to carefully check
the shipment on receipt. Make sure that all parts and accessories listed on the packing list are
accounted for. Immediately report any damage or shortage to the transport company and to
us. Verify that bolts and nuts have not loosened.
2.2. Specification inspection
Check the nameplate of the pump unit to verify that it is the product that you have ordered.
Pay particular attention to its voltage and frequency specifications.
NOTICE: If you find any damage or discrepancy, contact Tapflo.
WARNING: Do not use the product under conditions other than those specified. Doing so
may lead to short, electrical shock, or fire, or might inhibit the product from attaining its
full capabilities.
2.3. Lifting and transportation
WARNING:
➢Before handling the pump check the weight of the pump
on the nameplate. Refer to Your local standards on how
to handle the pump. If the weight is excessive to
transport by hand it must be lifted using slings and a
suitable lifting device e.g. a crane or forklift.
➢Always use at least two slings and make sure they are
secured in such a way to prevent the pump from slipping
and that the pump unit is hanging straight.
➢Never lift the pump with only one sling. Incorrect lifting
can cause serious injury and/or damage to the pump.
➢Always lift the pump by handles.
➢Never lift the pump under pressure.
➢Be careful that nobody passes under the pump when lifted.
➢Always disconnect electrical power before handling the pump.
CAUTION:
➢Never lift the pump by the electric cable. Doing so may cause a short, electrical shock,
or fire.
➢Pay special attention to the electric cable during transport so that it does not get
jammed and get pulled.
2.4. Storage
If the equipment is to be stored prior to installation, place it in a clean location. The pump
should be stored in an ambient temperature of 15°C (59°F) to 25°C (77°F). It should not be
exposed to any heat source e.g. radiator, sun as this could result in a negative way on the
tightness of the pump. Cover the pump strainer and discharge connection to keep pump
internals free of debris. Clean the pump thoroughly before installation. See also chapter 5.3.
Storage after operation.

3. Installation
IOM manual –SPT series 12
3. Installation
3.1. Precautions
DANGER:
Disconnect and lock out electrical power before installing or servicing the unit.
WARNING:
➢Do not install the pump in an explosion hazard zones.
➢Make sure that the unit cannot roll or fall over and injure people, or damage property.
WARNING:
Electrical shock hazard. Check that, the cable and cable gland have not been damaged during
transport before installing the pump.
NOTICE: Never force piping to make a connection with a pump.
These requirements apply:
➢Use the pump dimensional drawing in order to ensure proper installation.
➢Provide a suitable barrier around the work area, for example, a guard rail.
➢Remove all debris from the pump inlet before you install the pump.
➢Always check the impeller rotation before submerging the pump into liquid.
CAUTION:
➢The supply voltage variation:
➢continuous running: max±5% of the rated voltage.
➢intermittent running: max±10% of the rated voltage.
➢Pump should operate in water temperature between 0oC and 40oC.
➢The pump should be used only for pumping plain water. The pump should not be used
to pump fluids such as oil, saltwater, or organic solvents.
➢The pump must not be used in a partially disassembled state.
➢Do not use the pump in an area where the water pressure exceeds the given values
(see chapter 3.2. Maximum allowable operating pressure and maximum immersion
depth) , as it may damage the pump, or cause a short or electrical shock.
3.2. Maximum allowable operating pressure and maximum
immersion depth
Pump models
Maximum allowable operating pressure
All models
1 bar (14.5 PSI) + discharge head
Maximum allowable operating pressure defines maximum immersion depth. For more
information contact Tapflo.

3. Installation
IOM manual –SPT series 13
3.3. Preparation for installation
Below listed tools and measuring devices that are required to install the pump
Pre-installation check
Use megger tester to measure the resistance between the cable plug pin and the ground
terminal to verify the insulation resistance of the motor. Measure the resistance twice, between
each of the two pins and the ground.
CAUTION: Do not measure the insulation resistance with megger tester between the pug pins.
NOTICE:
Insulation resistance reference value >30MΩ. The reference value is given for new pump. For
reference values of a pump that has been put into operation, refer to chapter 5.2. Inspection
and service intervals.
3.4. Pump installation
The pump is transportable and intended to operate either completely or partially submerged
in the pumped liquid. The pump is equipped with a connection for hose or pipe (BSPP thread)
1. Route the cable so that it has no sharp bends, is not
pinched, and cannot be sucked into the pump inlet.
2. Push the hose all the way to the base of the hose
coupling. Tighten the hose clamp to secure the hose
in its place.
3. Handle the pump carefully.
When suspending the
pump to raise or to lower
it, attach a wire rope or a
chain to the pump's
handle.
4. Install the pump only in an area that can maintain a proper water level
NOTICE:
For details on the water level necessary for pump operation see chapter 4.6. Water level during
operation.

3. Installation
IOM manual –SPT series 14
5. The discharge hose can be routed vertically or
horizontally but must be without sharp bends.
6. Use the shortest possible length of discharge
hose or piping and minimize the number of
bends. Makes sure that the end of the hose
(discharge side) is lifted above the water
surface. If the hose ending is submerged in
water, it may cause the water to flow back
when the pump is stopped. If the end of the
hose is located at lower level than the
source water surface, water may continue to
flow out even after the pump is stopped.
WARNING:
If an excessive amount of sediment is drawn into the pump, it may cause the pump to wear,
which can lead to current leakage or electrical shock.
NOTICE:
Appropriate hose or pipe materials must be provided by the user, for more information contact
Tapflo.
7. During operation the pump must be placed upright position. If there is a risk that the pump
could be buried under the sediment, place the pump on a base, e.g. concrete blocks.
3.5. Electrical connections
ELECTRICAL HAZARD:
➢A certified electrician must supervise all electrical work. Follow the national and local
regulations.
➢Before starting to work on the unit, make sure that the unit and the control panel are
isolated from the power supply and cannot be energized. This applies to the control
circuit as well.
➢Leakage into the electrical parts can damage it or blow the fuse.
➢Keep the end of the motor cable out of the water.
➢Make sure that all unused conductors are insulated.
➢There is a risk of electrical shock or explosion if the electrical connections are not
correctly carried out or if product is damaged.

3. Installation
IOM manual –SPT series 15
Requirements
These general requirements apply for electrical installation:
➢The main voltage and frequency must comply with the specifications on the pump
nameplate.
➢The fuses and circuit breakers must have the proper rating.
➢Pump overload protection and short circuit (motor protection circuit breaker) must be
connected and set to the rated current according to the nameplate and, if applicable,
the extension cable specification.
➢The fuse rating and the cables must be in accordance with the local rules and
regulations.
➢If intermittent operation is prescribed, then the pump must be provided with
monitoring equipment supporting such operation.
3.6. Grounding
Electrical hazard:
➢All electrical equipment have to be grounded. This applies to the pump equipment, the
driver, and any monitoring equipment. Test the ground lead to verify that it is
connected correctly.
➢If the motor cable is jerked loose by mistake, the ground conductor should be the last
conductor to come loose from its terminal. Make sure that the ground conductor is
longer than the phase conductors. This applies to both ends of the motor cable.
➢Risk of electrical shock or burn. You must connect an additional ground fault protection
device to the grounded connectors if persons are likely to come into physical contact
with the pump or pumped liquids.
WARNING:
➢To prevent damaging the pump and causing current leakage, which may lead to
electrical shock, be sure to install the ground wire securely.
➢To prevent electrical shock caused by improper grounding, do not connect the ground
wire to a gas pipe, water pipe, lightning rod, or telephone ground wire.
3.7. Cable connection
These are the requirements to follow when you install cables:
➢The cables must be in good condition, not have any sharp bends, and not be pinched.
➢The sheathing must not be damaged and must not have indentations or be embossed
(with markings, etc.) at the cable entry.
➢The cable entry seal sleeve and washers must conform to the outside diameter of the
cable.
➢The minimum bending radius must not be below the accepted value.
➢If using a cable which has been used before, a short piece must be peeled off when
refitting it so that the cable entry seal sleeve does not close around the cable at the
same point again. Replace the cable if the outer cable sheath is damaged. Contact
Tapflo for service.
➢The voltage drop in long cables must be taken into account. The drive unit's rated
voltage is the voltage measured at the cable connection point in the pump.
WARNING:

3. Installation
IOM manual –SPT series 16
Before connecting the cable to the terminal board, make sure that the power supply (i.e. circuit
breaker) is properly disconnected. Failure to do so may lead to electrical shock, short, or injury
caused by the unintended pump start.
CAUTION:
➢If the cable must be extended, use an extension cable with the same or larger core size
as that of the cable that is provided with the pump. Using a cable of proper size will
prevent the motor from attaining its full capabilities or may cause the cable to overheat,
which may lead to fire, current leakage, or electrical shock.
➢If a cable with a cut or damaged sheath is submerged in water, the water may enter
the pump and cause the motor to short. This will damage the pump, which may lead
to current leakage, or electrical shock, or burn-out.
➢To prevent the cable from cuts or twists, which will damage the pump and may lead to
current leakage, electrical shock, or fire, make sure that the tires of vehicles do not run
over the cable.
➢If the cable must be submerged in water, make sure to use extension method providing
proper IP (Ingres Protection) rating. Failure to do so may lead to current leakage,
electrical shock, or burn-out.
Never submerge cable end in water.
If the cable must be extended, use an
extension cable with the same or larger core
size as that of the cable that is provided with
the pump.
To prevent water from leaking inside the
cable, make sure to securely maid the cable
connection part.
To avoid cable damage, route the cable so
that the cable is not bent, kinked, or pressed
against anything.

3. Installation
IOM manual –SPT series 17
Terminal board connection
Electric circuit diagram

4. Operation
IOM manual –SPT series 18
4. Operation
4.1. Precautions
DANGER:
If you need to move or service the pump, make sure that it is isolated from the power supply
and cannot be energized.
WARNING:
➢Never operate the pump without safety devices installed.
➢Never operate the pump with the discharge hose blocked, or the discharge valve
closed.
➢Make sure you have a clear retreat path.
➢Never work alone.
➢There is a risk of sudden restart in pumps with float switch
Distance in wet areas
Electrical hazard:
➢Risk of electrical shock. Make sure no one gets closer than 20 m to the unit when being
in contact with the pumped or mixed liquid.
➢Risk of electrical shock, this unit has not been investigated for use in swimming pools.
If used in connection with swimming pools special safety regulations apply.
4.2. Before operation
CAUTION:
Improper voltage and frequency of the power supply will prevent the pump from attaining its
full capabilities, and may also lead to current leakage, electrical shock, or fire
1. Once again, check the pump nameplate to verify that its voltage and frequency are correct.
2. Check the wiring, power supply voltage, the capacity of the ground leakage circuit breaker,
and the insulation resistance of the motor.
NOTICE:
Insulation resistance reference value ≥30MΩ. See chapter 3.3. Preparation for installation for
the test method.
3. Adjust the setting of the overflow protector (i.e. circuit breaker) to the pump's rated current
NOTICE:
Verify the rated current on the pump's nameplate
4. When using a generator, as much as possible avoid operating the pump in conjunction with
other types of equipment

4. Operation
IOM manual –SPT series 19
4.3. Trial operation
WARNING:
➢Make sure that the unit cannot roll or fall over and injure people or damage property.
➢In some installations, the pump and the surrounding liquid may be hot. Bear in mind
the risk of burn injuries.
➢Never start the pump while it is suspended, as the pump may jerk and cause serious
accident.
➢Make sure nobody is close to the unit when it is started. The unit will jerk in the opposite
direction of the impeller rotation.
NOTICE:
➢Inspect the pump. Check that there is no physical damage to the pump or cables.
➢Check the oil level in the oil housing (see chapter 5.4. Oil inspection and change).
➢Remove the fuses or open the circuit breaker, and check that the impeller can be
rotated freely.
➢Check that the monitoring equipment (if any) works properly.
1. Direct the float switch downward.
2. Rise the float switch (it will start the pump).
3. Return the float to the resting position (it will
stop the pump).
4. Perform steps (2) and (3) three times to verify
proper operation.
5. Operate the pump for a short time ( ≤1 minute) and perform the following checks:
➢Operating current: use an AC amp meter (clamp), measure the current at the phase
that is connected to the terminal board.
➢Operation voltage: use an AC voltmeter (tester) to measure the voltage at the terminal
board.
➢Power supply voltage tolerance: within ±10% of the rated voltage (see chapter 1.2.
Pump design)
➢Vibrations
CAUTION:
If the pump generates a considerable amount of vibration, noise, or smell, disconnect the power
supply immediately and contact Tapflo for further support.
6. Continue operations if no abnormal conditions are found during the trial operation.

4. Operation
IOM manual –SPT series 20
4.4. Operation
WARNING:
➢The pump may be extremely hot during operation. To prevent burns, do not touch the
pump with bare hands.
➢Do not insert your finger or any object into the pump's inlet opening. Doing so may
cause injury, electrical shock, short, or fire.
➢When the pump is not used for a long time, make sure that the power supply (such as
a breaker) is properly disconnected. If the wiring insulation deteriorates with the power
supply connected, it may cause current leakage, electrical shock, or fire.
WARNING:
➢During inspection and repair, disconnect the power supply to avoid starting the pump
unintentionally. Failure to disconnect the power supply may lead to serious accidents
including electrical shock, short, and injury.
➢During a power outage, disconnect the power supply to the pump. Unintentional
operation of the pump after power resumption would be extremely dangerous to
people around the pump.
CAUTION:
Do not operate the pump at unusually low head, or when the strainer is clogged with debris.
Doing so will prevent the pump from attaining its full capabilities, and may also generate
abnormal noise and vibration and cause damage to the pump, which may lead to current
leakage, electrical shock, and fire.
NOTICE:
➢It is the best for pump lifetime to operate at rated capacity and head.
➢A large electrical current flows when a submersible pump is started, causing the motor
windings temperature to rise rapidly. Frequent pump stop-and-go operation will
accelerate motor windings insulation deterioration, affecting motor lifetime
4.5. Motor protection
Circle thermal protector
Pumps are equipped with an internal motor protective equipment - circle thermal protector.
To protect the motor, if a current overload occurs in the motor or if the motor overheats under
the conditions given below, the pump will stop automatically, regardless of the water level
during operation.
➢Extreme fluctuation of power supply voltage.
➢Pump operated under overload condition.
➢Pump operated at open phase or binding condition.
CAUTION:
Unless the cause of a problem is removed, the pump will repeat the stop-and-go cycle,
eventually resulting in damage to the pump, and causing current leakage and electrical shock.
Therefore, after verifying that the power supply is disconnected, find and correct the cause of
the problem through inspection and repair.