Stairs SD Series User manual

Submersible Pump
INSTALLATION AND
OPERATING INSTRUCTIONS

2
:
EC DECLARATION OF CONFORMITY
according to the following EC Directives
- Machinery Directive : 2006/42EC/ as amended by 98/37/EC
- Electromagnetic Compatibility Directive : 2004/108/EC
The undersigned, K. T. Hsien, representing STAIRS INDUSTRIAL CO., LTD. / NO.27, LANE
267, HUACHENG RD., SINJHUANG CITY, TAIPEI COUNTY 242, TAIWAN, R.O.C.. manufacturer,
declares that the machine described hereafter:
Electric Pump (1~, 3~, 50HZ, 60HZ)
Model :
SD.., SV.., SVN.., SC.., SA.. ser
i es
Provided that it is used and maintained in accordance with the general accepted codes of good
practice and the recommendations of the instructions manual, meet the essential safety and
health requirements of the
Machinery Directive, and Electromagnetic Compatibility Directive.
For the most specific risks of this machine, safety and compliance with the essential
requirements of the Directive has been based on elements of:
EN 809, EN 60335-1, EN 60335-2-41, EN 61000-6-1:2007, EN 61000-6-3:2007
Date: 11.01.2012
Signature
Qualification: Factory Manager

3
SD/SV/SVN/SC/SA Series Submersible Pumps
H2
H1
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 l e ss than 20mega ohms . While
making the measurement, keep the power supply cable off the ground.
An auxiliary pump is recommended to be kept on hand in case of emergency.
2. Installatio n -
(1) ! W A R N I N G : 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
Fig-1
on
of f
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) ! W A R N I N G : Non-automatic pumps,
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, 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
Op e ra t i ng Water Le ve l
S t op Water Level
Fig-2

4
SD/SV/SVN/SC/SA Series Submersible Pumps
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) ! W A R N I N G : 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) ! W A R N I N G : Use short circuit breakers to prevent danger of electrical shock.
R S T
U V W
U V W E
U-phase: red
V-phase: white
W-phase: black
E - p hase : green
Motor
D. O . L .
Ground
Plate
Fig-3 Fig-4
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- a ut o mat i c pump
(1) Turn the operating switch on and off a couple of times to check for normal pump start.
Automatic pump
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.

5
SD/SV/SVN/SC/SA Series Submersible Pumps
Maintenance
Check pressure, output, voltage, current and other specifications. Unus u a l 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
(1) 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.
(2) 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)
.
(3) 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
R e p l a ce 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 r e p l a c e m ent schedule is based on nor m a l operating conditions.
Motor output
Part
0.4kw
0.75kw
1.5kw
2.2kw
3.7kw
5.5kw
Mechanical seal
12
19.875(3/4”)
25
Oil seal
16 x 26 x 5 t
18 x 28 x 6 t
25 x 44 x 7 t
Oil filler plug gasket
(Inner diameter) x (outer diameter) x (thickness) =8.5 x 13 x 0.8 t PE washer
Lubricating oil
(turbine oil #32)
100 cc
150 cc
425 cc
550 cc

6
SD/SV/SVN/SC/SA Series Submersible Pumps
Troubleshooting
Trouble
Cause
Remedy
Pump does not
start. Starts, but
immediately stops.
(1) Power failure
(2) Large discrepancy between power source and
voltage
(3) Significant drop in voltage
(4) Motor phase malfunction
(5) Electric circuit connection faulty
(6) Faulty connection of control circuit
(7) Fuse blown
(8) Faulty magnetic switch
(9) Water is not at level indicated by Float
(10) Float is not in appropriate level
(11) Float effective
(12) Short circuit breaker is functioning
(13) Foreign matter clogging pump
(14) Motor burned out
(15) Motor bearing broken
(1)~(3) Contact electric power
company and devise
counter-measures
(4) Inspect electric circuit
(5) Correct wiring
(6) Inspect connections and magnetic
switch
(7) Replace with correct type of fuse
(8) Replace with correct one
(9) Raise water level
(10) Adjust the position of float
(11) Repair or replace
(12) Repair location of short circuit
(13) Remove foreign matter
(14) Repair or replace
(15) Repair or replace
Operates, but
stops after a while.
(1) Prolonged dry operation has activated motor
protector and caused pump to stop
(2) High liquid temperature has activated motor
protector and caused pump to stop
(1) Raise stop water level
(2) Lower liquid temperature
(3) Correct rotation
(3) Reverse rotation
! WAR N I N G :
Does not pump.
Inadequate
volume.
(1) Reverse rotation
(2) Significant drop in voltage
(3) Operating a 60Hz pump on 50Hz
(4) Discharge head is high
(5) Large piping loss
(6) Low operating water level causes air suction
(7) Leaking from discharge piping
(8) Clogging of discharge piping
(9) Foreign matter in suction inlet
(10) Foreign matter clogging pump
(11) Worn impeller
(1) Correct rotation(see Operation)
(2) Contact electric power company
and devise counter-measures
(3) Check nameplate
(4) Recalculate and adjust
(5) Recalculate and adjust
(6) Raise water level or lower pump
(7) Inspect, repair
(8) Remove foreign matter
(9) Remove foreign matter
(10) Remove foreign matter
(11) Replace impeller
Over current
(1) Unbalanced current and voltage
(2) Significant voltage drop
(3) Motor phase malfunction
(4) Operating 50Hz pump on 60Hz
(5) Reverse rotation ! WAR N I N G :
(6) Low head. Excessive volume of water
(7) Foreign matter clogging pump
(8) Motor bearing is worn or damaged
(1) Contact electric power company
and devise counter-measure
(2) Contact electric power company
and devise counter-measure
(3) Inspect connections and magnetic
switch
(4) Check nameplate
(5) Correct rotation (see Operation2)
(6) Replace pump with low head pump
(7) Remove foreign matter
(8) Replace bearing
Pump vibrates;
excessive
operating noise.
(1) Reverse rotation
(1) Correct rotation
(2) Pump clogged with foreign matter
(2) Disassemble and remove foreign
matter
(3) Piping resonates
(3) Improve piping
(4) Gate valve is closed too far
(4) Open gate valve

7
SD/SV/SVN/SC/SA Series Submersible Pumps
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.
! W A R N I N G : Be sure to cut off power source b e g inn i n g 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 - assem b l e in reverse order of disassembly.
Be careful of the f o ll o wi n g 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.
P l e a se ob t a i n “ O ” rings, shaft se a l s and other parts from, pump dealer. The
table of d i m en s i o n s is given in “Maintenance”.

STAIRS INDUSTRIAL CO., LTD.
No. 3-8, Sanchial Tsun, Lutsao Hsiang
Chai Yi Hsien, Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
E-Mail: s[email protected]m.tw