Goulds STS21V User manual

Sump Pumps
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
INSTRUCTION MANUAL
IM236

2
This is a SAFETY ALERT
SYMBOL. When you see this
symbol on the pump or in the
manual, look for one of the
following signal words and
be alert to the potential for
personal injury or property
damage.
Warns of hazards that WILL
cause serious personal injury,
death or major property
damage.
Warns of hazards that CAN
cause serious personal injury,
death or major property
damage.
Warns of hazards that CAN
cause personal injury or
property damage.
NOTICE: Indicates special instructions which
are very important and must be followed.
THIS MANUAL MUST BE KEPT WITH
THE PUMP.
MAINTAIN ALL SAFETY LABELS.
DANGER
TO AVOID SERIOUS OR FATAL
PERSONAL INJURY OR MAJOR
PROPERTY DAMAGE, READ AND
FOLLOW ALL SAFETY INSTRUCTIONS
IN MANUAL AND ON PUMP.
WARNING
CAUTION
WARNING
Hazardous voltage
can shock, burn or
cause death.
IMPORTANT PRE-INSTALLATION INFORMATION
All electrical work must be
performed by a qualified
technician. Always follow
the local applicable electrical
code.
The pump must be connected to a dedicat-
ed electrical circuit protected by a prop-
erly sized circuit breaker or fuses. Install
a disconnect where required by code.
Code questions should be directed to your
electrical inspector. See Chart 1 for specific
information.
Disconnect electrical power before install-
ing or servicing the pump. The motor’s
automatic thermal overload protection
may allow an overheated pump to restart
unexpectedly.
Pump is not designed for use in swimming
pools, open bodies of water, hazardous
liquids, or where flammable gases exist.
Pumps and floats equipped with a 3-prong
grounded plug must be connected to a
3-wire receptacle. Do not attach to exten-
sions or connectors without a 3-prong
grounded plug. NOTE: Removing the plug
from the power cord is not allowable per
NEC code. Removing the plug will void
the agency listing.
This pump has been evaluated
for use with water only.
Risk of electric shock – this
pump is supplied with a ground-
ing conductor and grounding-type attach-
ment plug. To reduce the risk of electric
shock, be certain that it is connected only
to a properly grounded, grounding-type
receptacle.
WARNING
CAUTION

3
in the area a bolt-on or child-proof cover is
recommended.
3. PIPING
3.1. Discharge pipe should be the same size
as the pump discharge to insure optimum
performance. Using undersized pipe may
dramatically reduce the flow and therefore
waste energy. Your pump supplier can sug-
gest the correct pipe for your installation.
3.2. Install a threaded pipe adapter, matched
to the pipe type you are using, into the
threaded pump discharge. One end will have
a male thread and the other end will have
a barbed connector, compression fitting or
solvent weld connector. Use Teflon®tape on
all threaded joints. If using solvent welded
pipe and fittings it is best to dry fit them first
and after verifying the fit, solvent weld. A
union installed just above the sump or basin
cover will facilitate future maintenance and
replacement. See Chart 1 for discharge sizes.
3.3. Install a line check valve within 2 feet of
the pump. Install per valve manufacturer’s
instructions.
IMPORTANT - Drill a 1⁄8" (3.2mm) relief hole
in the discharge line approximately 2” (51
mm) above the pump discharge connection
but below the check valve and within the
sump. This “relief ” hole allows trapped air
to escape from the pump and prevents air-
locking the pump. Failure to drill this hole
is a major cause of sump pumps failing to
pump after long periods of inactivity such as
seasonal use. Model ST is self-venting - no
hole is required.
4. INSTALLATION IN SUMP
4.1. The pump can be placed directly on the
bottom of a poly or fiberglass sump basin
or a concrete sump bottom. If the bottom is
packed gravel the stones must be larger than
½” (13mm) in diameter and the pump
should be placed on bricks for support.
4.2. After connecting the discharge pipe to the
pump it can be lowered into the sump (ba-
sin). Always lower the pump by the handle
and the pipe, never by the power cord. Place
the pump against the basin wall so the switch
is to the center. See "Installation Data".
3. PIPING
4. INSTALLATION IN SUMP
1. GENERAL INFORMATION
1.1. Sump pumps are designed to operate inter-
mittently and usually seasonally. It is recom-
mended that you test the pump before your
rainy season begins to insure that the pump
and switch are operating properly.
1.2. We suggest installing a high water alarm
system and a battery back-up pump system
for finished basements or areas where flood-
ing will cause property damage. A back-up
generator is another option you can discuss
with your pump installer. Most power out-
ages occur during rain storms, just when
you need your sump pump the most! Pump
manufacturer's warranties cover only the
pump. Labor and incidental damage such as
flooding is not covered.
2. PRE-INSTALLATION CHECKS
2.1. Open all cartons and inspect for shipping
damage. Report any damage to your supplier
immediately.
2.2. Verify that all equipment is the correct volt-
age. Warranty does not cover damage caused
by connecting pumps and controls to incor-
rect voltage.
2.3. Is your basin sized correctly and the proper
type for the location?
Diameter - It must be wide enough to allow
the pump and switch to physically fit and
provide room for the switch to operate
freely. The vertical switch models typically
require less diameter than the wide-angle
float models. See "min. basin diameter" in
Chart 1.
Depth - It must be deeper
than the minimum depth at
which the switch turns the pump On. As an
example, if the pump turns on at 15" you
want to use a basin deeper than 15”.
See "On level" in Chart 1.
Style - There are several
sump basin styles available.
The location of the sump determines if you
require a cover and what type you require.
It is important to keep debris from entering
the sump and clogging the pump. An open
sump in a traffic area such as a basement is
dangerous. If children or pets will be playing
2. PRE-INSTALLATION CHECKS
1. GENERAL INFORMATION
WARNING
CAUTION

4
4.3. Check to insure all piping connections are
tight. The pipes should be supported by
fastening to floor joists or wall. This will
prevent the pump from moving in the sump.
If it moves the switch could get stuck and
either keep the pump running or not let it
turn on.
4.4. The power to the outlet should be Off at
this point. The dedicated outlet should sup-
ply power only to the pump.
4.5. Our sump pumps have either a single power
cord for pumps with built-in switches or
two power cords for pumps with piggyback
switches:
Built-In/Single Cord - plug the single power
cord into a dedicated power outlet.
Piggyback/Two Power Cords - insert the pig-
gyback switch male plug into a dedicated
power outlet. You then plug the standard
male pump plug into the back, female side,
of the piggyback switch plug.
4.6. Fasten the power cords to the discharge
pipes using tie wraps or electrical tape. Coil
and store any excess power cord outside the
sump.
5. OPERATION
5.1. Turn the power On at the breaker panel
and/or the disconnect switch.
5.2. Fill the basin with water and observe where
the pump turns On and Off. It should go On
well before the water overflows the top of
the sump. The pump should go Off before
the water goes below the pump suction. The
On-Off cycle on models with wide-angle
float switches is adjustable. Adjustment is
made by changing the tether length between
the switch body and the switch tether (pivot)
point. The tether length cannot be less than
3” – 3.5”. Tethers less than 3” may not allow
the float to drop down enough to turn off.
See "Installation Data".
5.3. Install a cover on the sump
basin if there is a danger
of debris, children, or pets falling into the
basin. See Basin “Style” in Section 2.3.
6. SEASONAL SERVICE / MAINTENANCE
6.1. If your sump pump only operates seasonally
and then sits idle for months it is recom-
5. OPERATION
6. SEASONAL SERVICE / MAINTENANCE
mended that you test the pump before your
rainy season begins. Fill the sump with water
and check for debris and proper switch
operation. Remove any debris which could
clog the suction strainer or jam the switch.
Insure that the switch operates freely and
does not hit the sump wall or hang-up on
piping or power cords.
7. OPTIONS
7.1. Your pump supplier has a full line of basins,
covers, high water alarms, and battery back-
up pump systems available to complete your
system. We also sell simplex and duplex
pump control panels. A duplex system is
recommended when the inflow is constant
and the pumps run almost continuously. The
duplex system provides a back-up pump in
the event the primary pump fails.
8. TROUBLE SHOOTING CHART
Extreme caution should be exercised when ser-
vicing electrical devices. Fatal injuries could re-
sult from electrical shock. Always disconnect the
electrical power from the device being serviced
unless it is necessary for the work being done.
MOTOR NOT RUNNING
(See causes 1, 2, 3, 4, 6, 8)
LITTLE OR NO LIQUID DELIVERED
(See causes 5, 6, 7, 8, 10)
PUMP WILL NOT TURN OFF
(See causes 7, 8, 9, 10, 13)
PUMP CYCLES CONSTANTLY
(See causes 9, 11, 12, 13)
PROBABLE CAUSES:
1. Tripped thermal protector.
2. Open Circuit breaker of blown fuse.
3. Rotating parts binding.
4. Defective motor.
5. Air locked.
6. Low voltage.
7. System head too high.
8. Pump clogged.
9. Level control defective or switch not
properly positioned.
10. Improper check valve direction.
11. Check valve leaking.
12. Incorrect size basin or wet-well.
13. Inflow excessive for size of pump.
8. TROUBLE SHOOTING CHART
7. OPTIONS
WARNING

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Model Nominal Float Cord Discharge Minimum Maximum Shipping
No. kW Phase Hertz Volts Current Switch
Length Connection Basin Solids Weight
Style Diameter Size
STS21V 0.25 1 60 115 2.5 amps Vertical 20' 1½" 12" 3/16" 9 lbs.
STS31V 0.33 1 60 115 4.5 amps Vertical 20' 1½" 12" 3/16" 9 lbs.
MODEL INFORMATION (CHART 1)
Suggested Pump Positioning in Sump
Figure 1
Australian Plug
Figure 2
INSTALLATION DATA
INSTALLATION DATA
MODEL INFORMATION (CHART 1)

6
General Pump Configuration
Figure 4
Hose Adapter
Figure 5
INSTALLATION DATA
INSTALLATION DATA
Typical Pump Installation in Sump
Figure 3
PUMP ELECTRICAL PLUG
CHECK
VALVE
FLOAT
SWITCH
UNION
PUMPING
RANGE

7
NOTES
NOTES

GOULDS WATER TECHNOLOGY LIMITED WARRANTY
This warranty applies to all water system pumps and related accessories manufactured and/or supplied by Goulds Water Tech-
nology, provided the installation is in accordance with the Instruction Manual issued by the Manufacturer.
Any part or parts found to be defective within the warranty period shall be replaced at no charge to the buyer or any subse-
quent owner during the warranty period. The warranty period shall exist for a period of twelve (12) months from the date of
installation or eighteen (18) months from the date of manufacture, whichever is shorter.
A consumer who believes that a warranty claim exists must contact the authorized Goulds Water Technology dealer from
whom the equipment was originally purchased and furnish complete details regarding the claim for warranty.
The warranty excludes:
(a) Labor, transportation and related costs incurred by the consumer to make the alleged defective equipment available to the
dealer for inspection.;
(b) Re-installation costs of repaired equipment;
(c) Reinstallation costs of replacement equipment;
(d) Consequential damages of any kind; and,
(e) Reimbursement for loss caused by interruption of service.
There are no warranties, expressed or implied, except such warranties as are definitely set forth herein. The Company shall
not be liable for damage or wear to pump caused by abnormal conditions, failure to properly prime or to operate pump
without flow or caused by corrosives, abrasives, or foreign objects. No obligations other than those herein set forth shall be
binding upon the company.
Goulds is a registered trademark of Goulds Pumps, Inc. and is used under license.
Teflon is a registered trademark of Dupont.
© 2012 Xylem Inc. IM236 Revision Number 1 July 2012
Xylem, Inc.
2881 East Bayard Street Ext., Suite A
Seneca Falls, NY 13148
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/gouldswatertechnology
Australia Korea
Xylem Water Systems Australia Pty. Ltd. Xylem Water Solutions Korea Co., Ltd.
Unit 3/1 Federation Way, Chifley Business Park 4F, Dong-A Building , 789
Chifley Business Park Yeoksam, Gangnam
Mentone, Victoria 3194, Australia Seoul, 135-929, Korea
Tel: [phone] Fax: [phone] Tel: [phone] Fax: [phone]
Singapore Philippines
Xylem Water Solutions Singapore Pte Ltd. Xylem Water Systems International, Inc.
1 Jalan Kilang Timor, #06-06 12 Ring Road, LISP II
Singapore 159303 Calamba Laguna 4027, Philippines
Tel: [phone] Fax: [phone] Tel: [phone] Fax: [phone]