SS
Anti-Rust
SS Shaft
Copper & Cold-rolled
SELF-PRIMING JET PUMPS
AJm
CONTENTS
1. Applications
2. Model Description
3. Technical Data
4. Implementation Standards
5. Safety Precautions
6. Product Structure
7. Pipeline Installation
8. Electrical Connection
9. Start-up and Maintenance
10. Troubleshooting
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AJm
Self-priming Jet Pumps
Symptom Cause Corrective Action
Motor works
intermittently
or the stator
winding is
burned out
The impeller is jammed or under
overload operation for a long time.
Incorrect grounding, broken cable
or the electric pump is hit by
lightning.
Clear sundries in the pump chamber;
operate the pump under the rated
flow as much as possible.
Seek for the reason, and replace
winding coils.
This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabilities
or lack of experience and knowledge if they have
been given supervision or instruction concerning
use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be
made by children without supervision.
Attention!
If the appliance or the supply cord is damaged, it
must be repaired by manufacturer, its service
agent or qualified person.
Meaning of crossed –out wheeled dustbin:
Do not dispose of electrical appliances as
unsorted municipal waste, use separate
collection facilities.
Contact you local government for information
regarding the collection systems available.
112
AJm
Self-priming Jet Pumps
Before installation, you should carefully read this manual, and pay
attention to safety cautions and instructions in this manual.
Our factory is neither responsible for nor is reliable for paying
compensation for personal injury, pump damage and other property
losses caused by violation of safety cautions.
1. Applications
1) It is applicable to household water supply, equipment support, well water
lifting, pipeline pressurization, garden watering, vegetable greenhouse
watering, fish farming and poultry raising, etc..
2) Transfer clean water and other non-corrosive liquids with low viscosity;
do not transport inflammable, explosive, gasified liquids and liquids
containing solid particles or fibers. The PH of water must between 6.5 and
8.5.
Remark:
This series of pump could be transformed into automatic water pump, which
is realized through external automatic plant that is composed of pressure
switch, pressure tank, etc.. Function features of the automatic pump are as
follows: when the power is on, turn on the water tap and the pump will start
working automatically; when the water tap is turned off, the pump will stop
working automatically. If a water tower is used along with the automatic
pump, connect to the upper limit switch and the pump will start or stop
working automatically with water level in the water tower.
2. Model Description
AJ m x x
Feature: S-Stainless steel pump body
Rated power(x 10W)
Single phase motor, m for single phase only
LEO3.0 Series Jet Pump
3. Technical Data
Max. flow: 140L/min
Max. head: 90m
Output power: 0.3~2.2kW
Max. Suction: 9m
Insulation class: IPX4
Protection class: F
Max. ambient temperature: +40℃
Max. liquid temperature: +60℃
10. Troubleshooting
Check the pump after power cut-off.
Symptom Cause Corrective Action
a. repair switch contact or replace
the switch;
b. replace the safety fuse;
c. check and tighten the power
connector;
d. repair or replace cables
Replace with a same type capacitor
(send to the maintenance point for
repair).
Replace the bearing (send to the
maintenance point for repair).
Turn rotating shaft of the fan blade
terminal with screw driver to let it
rotate flexibly or demount the pump
body to clear sundries.
Replace winding coils (send to the
maintenance point for repair).
Invert two-phase wirings of the
motor (three-phase motor).
Re-fill the pump with water.
Replace the impeller (send to the
maintenance point for repair).
Check sealing of various joints of
the inlet pipelines.
Adjust installation height of the
pump.
Start up the pump after ice is melted.
Replace the damaged parts(send to
the maintenance point for repair).
Select suitable pump.
Apply the pipe with the stipulated
diameter, and make the inlet pipe
short.
Clean pipeline, foot valve or pump
chamber, clean foreign materials.
The motor
can not be
started
The motor is
in operation,
but no water
is discharged
Insufficient
pressure
Single-phase power supply
(three-phase electric motor):
a. poor connection of the power
switch;
b. fuse is burned out;
c. loose power cable;
d. phase failure of the cable.
Capacitor is burned out.
The rotating shaft and bearing are
jammed.
Impeller is jammed.
Stator winding is damaged.
Incorrect direction of pump rotation.
The pump is not fully filled with water.
The impeller is damaged.
Leakage of the suction pipe.
Water level is too low.
Freeze caused by accumulated water
in the pipeline or the chamber.
Water that is too hot can result in the
failure of plastic parts.
Incorrect pump type.
The inlet pipeline is too long or with
too many bends, pipe diameter is
not selected as required.
Inlet pipeline, filter screen or pump
chamber is blocked by foreign
materials.
112
AJm
Self-priming Jet Pumps
9. Start-up and Maintenance
Do not start up the pump before the pump chamber is filled
with water.
Do not touch the electric pump unless its power has been cut
off for at least 5 minutes.
Do not dismount the pump body unless water in the pump
chamber is empted.
Rotate the fan blade before startup, check whether the pump
ro tation is flex ib le and then
unscrew the water-filling plug, fill
the pump chamber with clean
water from the water injection
hole, then tighten the plug screw
after the air has been completely
discharged. Set the valve in a
smaller flow in start-up and adjust
to the required flow after water
discharging (working range is
displayed on the nameplate).
Attention:
The pump chamber should be filled with water before first use and water
1 .)
refilling is unnecessary in the future.
In case no water is discharged after being started for more than 5 minutes
2).
with water filled, turn off the electric pump, re-fill water or check whether the
inlet pipeline has leakages.
In case of any frost and ice damages, please open the drain plug to empty
3).
water in the pump chamber. When start up the pump again, open the drain
plug, fill water and tighten it and then the pump is usable.
4).
In case not use for a long time, water in the pump should be emptied. The
pump body, impeller and support should be cleaned and coated with
anticorrosive oil before they are put in a ventilated and dry place for use.
In case the pump is halted for a long time, start it up again according to
5).
above diagram.
6).
In summer or when the ambient temperature is high, pay attention to
ventilation, avoid dew on electrical parts which will result in electrical faults.
In case the motor is hot or abnormal, cut off the power immediately and
7).
check faults according to the following table.
4. Implementation Standards
IEC/EN 60335-1 Household and similar electrical appliances--safety Part1:
General requirements.
IEC/EN 60335-2-41 Household and similar electrical appliances--safety
Part2-41:Particular requirements for pump.
2006/95/EC Low voltage directive
5. Safety Precautions
1. To ensure normal and safety operation of the electric
pump, read the manual carefully before use.
l
ua
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ON
OFF
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1
0
0
2. The electric pump should have reliable grounding to
prevent short circuit; for safety, leakage protection switch
should be equipped and be careful no to wet the power
plug; socket should be connected in damp - proof area.
3. Do not touch the electric pump while working; do not
wash, swim near working area or let livestock into the
water to avoid accidents .
4. Avoid splashing pressured water to the electric pump as
well as prevent the pump immersed by water.
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AJm
Self-priming Jet Pumps
5. Keep the pump in ventilation.
OFF
6. In case ambient temperature is lower than 4℃ or the
pump is not used for a long time, empty liquid the pipeline
system to avoid ice cracking of the pump chamber.
Do not operate the pump for a long time without water in
it.
OFF
7. The pumped liquid maybe hot and under high pressure,
before moving and demounting the bump, valves in both
sides of the bump should be turned off first and then
empty liquids in the pump and pipelines so as not to be
scalded.
8. Do not transfer any inflammable, explosive or gasified
liquids that beyond the stipulation.
6) Automatic device(Pressure switch)
While using the automatic pump, in case it still operates after turning off
6.1 .)
the water tap, lower down power cut-off pressure of the pressure switch
on the premise of pipeline without leakage, namely, rotate the variable
screw nut II in counterclockwise direction (-) to acquire lower closing
pressure.
In case the pump is often enabled when the water tap is turned off
6.2).
(sometimes it is turned on and sometimes it is turned off), check whether
pipeline and the bottom valve have leakages and pressure vessel
pressure is normal, eliminate timely if any.
In case the pressure switch is alternately turned on and turned off
6.3).
(frequent start) after turning on the water tap, increase power cut-off
pressure of the pressure switch, namely, rotate the variable screw nut I in
clockwise direction to acquire higher opening pressure.
9. Ensure the pump will not be accidently turned on while
installing and maintaining; if not used for a long time, cut
off the power first and then turn off valves in inlet and
outlet of the pump.
AJm75
-6
Q 10 5 l/min
H 36-23 m
Hmax 40 m
V 180-220 ~
Hz 50
Hmin 23 m
kW 0.75
HP 1.0
In 6.0 A
-1
min
2900
Size 1" x 1"
IP X4
C 16 μF
VL 450 V
l CL F
Continuous duty Thermally protected
n.
www.leogroup.cn
10. Power supply should be in accordance with the
voltage stated in the nameplate. If not used for a long
time, put the pump in dry, ventilated and cool place under
room temperature.
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AJm
Self-priming Jet Pumps
8. Electrical Connection
Unless the power is off, do not wiring the junction box.
The electric pump should have reliable grounding to prevent current
leakage with leakage protection switch being equipped.
Electrical connection and protection should be conducted according to
1 .)
stipulations. Specification of working voltage is marked on the nameplate;
please ensure the motor is in accordance with power supply.
2).
In case the working area of the electric pump is too far from the power
supply, power transmission lines should be of a heavier gauge, otherwise
the electric pump cannot work normally because the voltage drop is too
dramatic.
A rubber extension cable shall be applied for the electric pump in case of
3).
outdoor use.
Check rotation of the motor (three-phase motor).
4).
5).
Check whether operation of the electric pump is normal, rotation is correct,
which could be observed from the fan blade terminal, e.g. clockwise
rotation means correct direction. In case the rotation is incorrect, cut off
power and exchange the two power cables.
~2 20V ~2 20V ~3 80V ~3 80V
switch
fuse
junction box
of the motor
pressure
switch
junction box
of the motor
magnetic
thermal
switch
switch
fuse
junction box
of the motor
pressure
switch
junction box
of the motor
magnetic
thermal
switch
6. Product Structure
POS.
Part
1
Pump body
2
Diffuser
3
Impeller
4
Mechanical seal
5
Seal holder
6
Pump support
7
Bearing
8
Rotor
9
Spring washer
POS.
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11
12
13
14
15
16
17
18
Part
Fan cover
Fan
End plate
Capacitor
Capacitor box
Terminal board
Stator
Bracket
Cable holder
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AJm
Self-priming Jet Pumps
7. Pipeline Installation
This product should be installed and maintained by personnel
who is proficient in this manual and has special qualifications.
Installation and operation should be in accordance with local
regulations and recognized operation standards.
Install pipelines properly as stipulated in the manual and
meanwhile conduct frost protection measures for the
pipeline.
Max. water temperature: + 40℃
Min. water temperature: +4℃
1. For pump installation,
the inlet pipe should be as
short as possible with the
least turnings.
The pump s h o u l d b e
installed in ventilated and
dry environment. It could
b e i n s t a lled o u t s i d e ,
provided having proper
covering to prevent rain
and wind.
2. For pipeline use, valves
should be instal led on
inlet and outlet pipelines
and the inlet pip eline
should be installed with
check valve.
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Correct Installation Diagram
Incorrect Installation Diagram
B1 B2
A:
1. Drain Plug
2. Electric pump
3. Water tap
4. Outlet pipe
B: Installation precautions for inlet
pipelines
1 .)
While installing the electric pump, do
not use too soft rubber tube for the
inlet pipeline, avoiding to be sucked
flat.
The foot valve should be vertically
2).
placed and installed 30cm from
water bottom to avoid sucking in
sands and stones (B2);
Joints of the inlet pipelines should be
3).
sealed with the least elbows, no
water can be sucked.
Diameter of the inlet pipe should be
4).
A
B
at least in accordance with that of
the water inlet, so as to avoid too
much water loss which will influence
outlet performance.
Pay attention to drop of water level
5).
while using, the foot valve should not
be above the water surface (B1).
In case the inlet pipe is longer than
6).
10m or its lifting height exceeds 4m,
the pipe diameter should exceed
diameter of water inlet of the pump.
Ensure the pumped will not be
7).
affected by pipeline pressures while
installing the pipelines.
Filter should be installed in inlet
8).
pipelines so as to avoid solid
particles to enter into the electric
pump.
C: Installation Precautions of the
outlet pipeline
Pipe diameter of the outlet pipeline
should be at least in accordance with
that of the water outlet, so as to reduce
its voltage drop, high flow rate and
noise to the minimum.
5. Filling plug
6. Tie-in
7. Inlet pipe
8. Foot valve
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