Evergush EFS-Series User manual

Disassembly and Assembly
1. Disassembly-
When disassembling pump, have a piece of cardboard or wooden board ready to place the
different parts on as you work. Do not pile parts on top of each other. They should be laid out neatly in
rows. The “O” ring and gasket cannot be used again once they are removed. Have replacement parts
ready. Disassemble in the following order, referring to the sectional view.
! ! WARNING : Be sure to cut off power source beginning disassembly.
(1) Remove pump casing bolts, raise the motor section and remove pump casing.
(2) Remove shaft head bolt and impeller.
(3) Remove oil filler plug and drain lubricating oil.
(4) Remove intermediate casing bolts and intermediate oil chamber.
(Remember that any lubricating oil remaining in the mechanical seal chamber will flow out.)
(5) Carefully remove mechanical seal, taking care not to scratch sliding surface or motor shaft.
2. Assembly-
Re-assemble in reverse order of disassembly.
Be careful of the following points.
(1) During re-assembly, rotate the impeller by hand and check for smooth rotation. If rotation is not
smooth, perform steps-(3) through -(5) again.
(2) Upon completion of re-assembly step -(1) rotate the impeller by hand from the suction the suction
inlet and check that it rotates smoothly without touching the suction cover before operating the
pump.
Please obtain “O” rings, shaft seals and other parts from, pump dealer. The table of dimensions is given in
“Maintenance”.
EFS-Series
Stainless Steel Sewage Pump
Asia Automatic Pump Co.,Ltd
http://www.evergushpump.com.tw

Introduction
Check the following points upon receipt of your pump:
Ø Is the pump exactly what you ordered? Check nameplate. It is especially important that you
check whether the pump is to be used with 50 or 60 Hz.
Ø Has any damage occurred during shipment? Are any bolts or nuts loose?
Ø Have all necessary accessories been supplied? (For a list of standard accessories see
Construction.)
We recommend that you keep a spare pump on hand in case of emergencies. Keep this instruction manual in a
place for future reference.
Specifications
Check the nameplate for your pump’s head (HEAD), discharge volume (CAPACITY), speed (SPEED), motor
voltage and current.
Other specifications are noted in the chart below.
Item Specifications
Type Sewage, waste water, miscellaneous drain water
EF ,EA, EFK 0.4~5.5 kW 0~40℃(32~104F)
Liquid handled Temperature
EF-(A) 0.4~1.5 kW 0~40℃(32~104F)
Casing Cast iron
Impeller Cast iron SUS316 stainless steel (optional)
Materials
Shaft SUS410 stainless steel
Motor type Dry type submersible motor
Shaft seal lubrication oil Turbine No.32 ISO VG-32
Maximum water depth 10m (33ft)
EFS-A
EFS
EFS-A
SUS316 SUS304 (Optional)
Dry motor type or Oil motor type
SS316
SS316
SS316
SS316
SS316
SS316
SS316
SS316
SS316
SIC/SIC
SUS316
Stainless Steel SUS316

Installation
1. Check the following before beginning installation.
Insulation resistance measurement:
With the motor and cable (excluding the power supply cable) immersed in water, use a Megger to measure
the insulation resistance between ground and each phase of the motor, and again between each phase of
the motor. The Megger should indicate an insulation resistance of not less than 20mega ohms. While
making the measurement, keep the power supply cable off the ground.
We recommend that an auxiliary pump be kept on hand in case of emergency.
2. Installation-
(1) ! WARNING : Under no circumstances
should cable be pulled while the pump is
being transported or installed.
Attach a chain or rope to the grip and
install the pump.
(2) This pump must not be installed on its
side or operated a dry condition. Ensure
that it is installed upright on a secure
base.
(3) Install the pump at a location in the tank
where there is the least turbulence.
(4) If there is a flow of liquid inside the tank,
support the piping where appropriate.
Install piping so that air will not be
entrapped. If piping must be installed in
such a way that air pockets are
unavoidable, install an air release valve
wherever such air pockets are most likely
to develop.
(5) Do not permit end of discharge piping to
be submerged, as backflow will result
when the pump is shut down.
(6) ! WARNING : Non-automatic pumps
(models EF,EA), have an automatic
operating system bump operating water
level near the minimum operating level
as the automatic cut-off switch
incorporated inside the motor will be
activated. To avoid dry operation, install
an automatic operating system, as
shown in Fig-1 and maintain a safe
operating water level.
(7) For automatic pumps (models EF-A),
install the floats as shown in Fig-2. The
pump may not start if a floats switch
touches the wall of the water tank or the
piping. Install the floats so that this will
not happen.
H1: Lowest water level (Motor flange)
H2: Operating water level
This must be above the top of the motor
Fig-2
Operating Water Level
Stop Water Level
Fig-1
H2
H1
off
on
on
Troubleshooting
Trouble Cause Remedy
(1) Power failure
(2) Large discrepancy between power source and
voltage
(3) Significant drop in voltage
(1)~(3) Contact electric power
company and devise
counter-measures
(4) Motor phase malfunction (4) Inspect electric circuit
(5) Electric circuit connection faulty (5) Correct wiring
(6) Faulty connection of control circuit (6) Inspect connections and magnetic
switch
(7) Fuse blown (7) Replace with correct type of fuse
(8) Faulty magnetic switch (8) Replace with correct one
(9) Water is not at level indicated by Float (9) Raise water level
(10) Float is not in appropriate level (10) Adjust the position of float
(11) Float effective (11) Repair or replace
(12) Short circuit breaker is functioning (12) Repair location of short circuit
(13) Foreign matter clogging pump (13) Remove foreign matter
(14) Motor burned out (14) Repair or replace
Does not start.
Starts, but
immediately stops.
(15) Motor bearing broken (15) Repair or replace
(1) Prolonged dry operation has activated motor
protector and caused pump to stop
(1) Raise stop water level
(2) High liquid temperature has activated motor
protector and caused pump to stop
(2) Lower liquid temperature
Operates, but stops
after a while.
(3) Reverse rotation ! WARNING : (3) Correct rotation
(1) Reverse rotation (1) Correct rotation(see Operation)
(2) Significant drop in voltage (2) Contact electric power company
and devise counter-measures
(3) Operating a 60Hz pump on 50Hz (3) Check nameplate
(4) Discharge head is high (4) Recalculate and adjust
(5) Large piping loss (5) Recalculate and adjust
(6) Low operating water level causes air suction (6) Raise water level or lower pump
(7) Leaking from discharge piping (7) Inspect, repair
(8) Clogging of discharge piping (8) Remove foreign matter
(9) Foreign matter in suction inlet (9) Remove foreign matter
(10) Foreign matter clogging pump (10) Remove foreign matter
Does not pump.
Inadequate volume.
(11) Worn impeller (11) Replace impeller
(1) Unbalanced current and voltage (1) Contact electric power company
and devise counter-measure
(2) Significant voltage drop (2) Contact electric power company
and devise counter-measure
(3) Motor phase malfunction (3) Inspect connections and magnetic
switch
(4) Operating 50Hz pump on 60Hz (4) Check nameplate
(5) Reverse rotation ! WARNING : (5) Correct rotation (see Operation2)
(6) Low head. Excessive volume of water (6) Replace pump with low head pump
(7) Foreign matter clogging pump (7) Remove foreign matter
Over current
(8) Motor bearing is worn or damaged (8) Replace bearing
(1) Reverse rotation (1) Correct rotation
(2) Pump clogged with foreign matter (2) Disassemble and remove foreign
matter
(3) Piping resonates (3) Improve piping
Pump vibrates;
excessive operating
noise.
(4) Gate valve is closed too far (4) Open gate valve
Fig-1
H2
H1
off
on
outlet
Fig-2
Operating Water Level
Stop Water Level
outlet
EFS-A
pump
EFS

Maintenance
Check pressure, output, voltage, current and other specifications. Unusual readings may indicate. Refer to
Troubleshooting and correct as soon as possible.
1. Daily inspections
(1) Check current and ammeter fluctuation daily. If ammeter fluctuation is great, even though
within the limits of pump rating, foreign matter may be clogging the pump. If the quantity of liquid
discharged falls suddenly, foreign matter may be blocking the suction inlet.
2. Regular inspections
(2) Monthly inspections
Measure the insulation resistance. The value should be more than 1M ohm. If resistance starts to
fall rapidly even with an initial indication of over 1M ohm, this nay be an indication of trouble and
repair work is required.
(3) Annual inspections
To prolong the service life of the mechanical seal by replacing the oil in the mechanical seal
chamber once a year. Water mixed the oil or cloudy textures are indications of a defective
mechanical seal requiring replacement. When replacing the oil, lay the pump on its side with filler
plug on top. Inject suitable amount turbine oil No.32 (ISO VG-32)
.
(4) Inspections at 3-5year intervals
Conduct an overhaul of the pump. These intervals will preclude the possibility of future trouble.
3. Parts that will need to be replaced
Replace the appropriate part when the following conditions are apparent.
Replaceable part Mechanical seal Oil filler plug gasket Lubricating oil O-ring
Replacement guide
Whenever oil in
mechanical seal
chamber is clouded
Whenever oil is
replaced or
inspected
Whenever clouded
or dirty
Whenever pump is
overhauled
Frequency Annually A half yearly A half yearly Annually
Note: above replacement schedule is based on normal operating conditions.
Motor output
Part 0.4kw 0.75kw 1.5kw 2.2kw 3.7kw 5.5kw
Mechanical seal 12ψ 19.875(3/ 4”)ψ 25ψ
Oil seal 16ψx 26ψx 5 t 18ψx 28ψx 6 t 25ψx 44ψx 7 t
Oil filler plug gasket (Inner diameter) x (outer diameter) x (thickness) =8.5ψx 13ψx 0.8 t PE washer
Lubricating oil
(turbine oil #32) 100 cc 150 cc 425 cc 550 cc
Electrical wiring
(1) Wiring
a) Wire as indicated for the appropriate start system as shown in Fig-3.
b) Loose connections will stop the pump. Make sure all electrical connections secure.
(2) Cable
c) ! WARNING : Never let the end of the cable contact water.
d) If the cable is extended, do not immerse the splice in water.
e) Fasten the cable to the discharge piping with tape or vinyl strips.
f) Install the cable so that it will not overheat. Overheating caused by coiling the cable and
exposing it to direct sunlight.
(3) Grounding
As shown in Fig-4 ground the green wire (label E). Under no circumstances should the green wire
be connected to the power supply.
(4) ! WARNING : Use short circuit breakers to prevent danger of electrical shock.
Operation
1. Before starting the pump
(1) After completing installation, measure the insulation resistance again as described in Installation.
(2) Check water level.
If the pump is operated continuously for an extended period of time in a dry condition or at the
lowest water level, the motor protector will be activated. Constant repetition of this action will
shorten pump service life. Do not start the pump again in such a situation until after the motor has
completely cooled.
2. Test operation….
Non-automatic pump (EF,EA)
Automatic pump (EF-A)
(1) Turn the operating switch on and off a couple of times to check for normal pump start.
For the EF-A
Floating switch must be raised for the pump to start.
(2) Next, check direction of rotation. If discharge volume is low or unusual sounds are heard when the
pump is operating, rotation has been reversed. When this happens, reverse two of the wires.
R S T
Motor
D.O.L.
U V
U
W
Fig-3 Fig-4
Ground
Plate
U V
U
W
U-phase: red
V-phase: white
W-phase: black
E-phase: green
E
W
(EFS)
(EFS-A)
(EFS-A)