Sears 390.284020 User manual

OWNER’S
MANUAL
3-WIRE SUBMERSIBLE
PUMP MODEL Nos.
390.284020 390.284060
390.284030 390.284070
390.284040 390.284080
390.284050 390.284090
CONTROL CENTER Nos.
390.284120 390.284250
390.284130 390.284260
390.284140 390.284270
2-WIRE SUBMERSIBLE
PUMP MODEL Nos.
390.285510
390.285520
390.285530
CAUTION:
Read and Follow
All Safety Rules and
Operating Instructions
Before First Use of
This Product.
Save This Manual For
Future Reference.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
• Safety Instructions
• Installation
• Operation
• Troubleshooting
• Repair Parts
PRINTED IN U.S.A.
TWO and THREE WIRE
SUBMERSIBLE PUMPS
Form No. F642-9410 (Rev. 5/25/95)

CONTENTS
Safety ...................................................................................2
Pump Performance/General Information...........................3
Before You Start/Tools/Materials........................................4
Installation
Piping ....................................................................4-5,8-12
Electrical........................................................................6-8
Helpful Hints.................................................................11-12
Parts..............................................................................13-15
INTRODUCTION
Please take a few minutes to read our instructions before in-
stalling your submersible pump. It will help to assure per-
fect installation and help you avoid needless service
expenses.
Carefully read and follow all safety instructions in this man-
ual or on pump.
This is the safety alert symbol. When you see this sym-
bol on your pump or in this manual, look for one of
the following signal words and be alert to the potential for
personal injury!
warns about hazards that will cause serious
personal injury, death or major property damage if ignored.
warns about hazards that can cause serious
personal injury, death or major property damage if ignored.
warns about hazards that will or can cause
minor personal in jury or property damage if ignored.
The word NOTICE indicates special instructions which are
important but not related to hazards.
To avoid risk of serious bodily injury and property
damage, read safety instructions carefully before in-
stalling pump.
1. Under certain conditions, submersible
pumps can develop extremely high pres-
sure. Install a pressure relief valve capable
of passing entire pump flow at 75 PSI (517kPa).
Do not allow pump, pressure tank, piping, or
any other system component containing water
to freeze. Freezing may damage system, leading to in-
jury or flooding. Allowing pump or system compo-
nents to freeze will void warranty.
2. Follow local and/or national plumbing and electrical
codes when installing pump.
3. Keep well covered while installing pump to prevent
leaves and other foreign material from falling into well,
contaminatingthewellandpossiblydamagingthepump.
4. Protect pump and piping system from freezing. Allowing
pump or water system to freeze could severely damage
pump and voids warranty.
5. Toprotectsystem againstover-pressure,installapressure
relief valve (Stock No. 27220).
6. With a new well, test well water for purity before using.
Consult your local Health Department for procedure.
Hazardous voltage. Can shock, burn,
cause death, or start fires.
7. Disconnect electrical power source before installing or
working on pump.
8. Use pump only in a well application.
9. Correct fusing, wiring and grounding are essential to
proper operation. See Page 6 for electrical instructions.
10. Line voltage and frequency listed on motor nameplate
must agree with line voltage and frequency of electrical
power supply.
11. Use of fuses or wire smaller than size recommended in
owner's manual can cause overheating, possible fires,
and will void warranty.
2
FULL ONE YEAR WARRANTY ON SUBMERSIBLE PUMPS
For one year from the date of purchase, when pump is installed and maintained according to our instructions and not subjected
to sand or abrasive damage, Sears will furnish and install a new pump, free of charge, if the pump is defective in materials orwork-
manship. During the same period, Sears will repair the control center, free of charge, if defective in material or workmanship.
LIMITED WARRANTY ON SUBMERSIBLE PUMPS (NOT INCLUDING CONTROLS)
After one year and through three years from the date of purchase, Sears will furnish, free of charge, a replacement pump (not in-
cluding control center and fittings) if the pump is defective in material or workmanship. You pay for installation.
LIMITATION OF LIABILITY
SEARS WILL NOT BE LIABLE FOR LOSS OR DAMAGE TO PROPERTY OR ANY INCIDENTAL OR CONSEQUENTIAL LOSS OR EX-
PENSE FROM PROPERTY DAMAGE DUE DIRECTLY OR INDIRECTLY FROM THE USE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion
may not apply to you.
WARRANTY SERVICE IS AVAILABLE BY SIMPLY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPARTMENT IN THE
UNITED STATES.
This warranty applies only while the product is in the United States.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., Dept. 817 WA, Hoffman Estates, IL 60179
RULES FOR SAFE INSTALLATION AND OPERATION

GENERAL INFORMATION
NOTICE: Model Number of your pump is located on the
pump shell. Record this number and keep in a safe place for
future reference in the event service is needed.
Themostimportantthingsyoushouldknowaboutyourwell
are: (1) its total depth; (2) depth to water; (3) draw down
water level.
1. The well total depth is the distance from the ground
level to the well bottom.
2. Depth to water ismeasuredfromthegroundleveltothe
water level in the well when the pump is not running.
3. Draw down water level is the distance from ground
level to the water level while water is being pumped. In
most wells, the water level drops when water is being
pumped.
Usually you can obtain this information from your well
driller. Enter it in box at right.
3
Record the following information at the
time of installation and retain it for future
reference:
Pump Model No.
Control Center Model No.
Horsepower
Volts
Phase
Hertz
Full Load Amps
Well Casing Diameter
Well Depth
Depth to Water
Draw Down Water Level
Table I - Pump Performance Chart (In Gallons Per Minute)
Residential Pumps with 1-1/4” Discharge
Discharge
Model Pressure Pumping Depth in Feet *
Number H.P. Voltage Stages P.S.I. 20 40 60 80 100 125 150 175 200 250 300 350 400
390.285510 1/2 115 6 40 13.6 12.6 11.5 10.1 8.6 – – – – – – – –
390.285520 1/2 230 6 40 13.6 12.6 11.5 10.1 8.6 – – – – – – – –
390.284020 1/2 230 6 40 13.6 12.6 11.5 10.1 8.6 – – – – – – – –
390.285530 3/4 230 8 40 – – 13.5 12.7 11.9 10.7 9.4 7.9 – – – – –
390.284030 3/4 230 8 40 – – 13.5 12.7 11.9 10.7 9.4 7.9 – – – – –
390.284040 1 230 10 40 – – – – 13.5 12.9 11.9 10.9 9.8 7.4 – – –
390.284050 1-1/2 230 14 40 – – – – – – – 13.5 12.9 11.7 10.4 8.9 7.1
High Capacity Pumps with 1-1/4” Discharge
Discharge
Model Pressure Pumping Depth in Feet *
Number H.P. Voltage Stages P.S.I. 20 40 60 80 100 125 150 175 200 250 300 350 400
390.284060 1 230 7 40 26.4 24.7 22.7 20.7 18.4 – – – – – – – –
390.284070 1-1/2 230 9 40 – – 25.8 24.3 22.9 21.0 18.8 15.4 – – – – –
390.284080 2 230 12 40 – – – – 26.4 25.1 23.7 22.2 20.8 17.2 – – –
390.284090 3 230 17 40 – – – – – – – 26.7 25.5 23.8 21.7 19.6 16.8
Pump Control Max Fuse AWG Cable Size
Model Box Load Rating
No. Type No. HP Volts Amps (Amps) 12 10 8
390.285510 2-Wire – 1/2 115 12.0 20 160 – –
390.285520 2-Wire – 1/2 230 6.0 15 650 1020 –
390.285530 2-Wire – 3/4 230 8.4 15 480 760 –
390.284020 3-Wire 390.284120 1/2 230 6.0 15 650 1020 –
390.284030 3-Wire 390.284130 3/4 230 8.4 20 480 760 –
390.284040 3-Wire 390.284140 1 230 9.8 25 400 630 –
390.284060 3-Wire 390.284140 1 230 9.8 25 400 630 –
390.284050 3-Wire 390.284250 1-1/2 230 11.5 30 310 480 770
390.284070 3-Wire 390.284250 1-1/2 230 11.5 30 310 480 770
390.284080 3-Wire 390.284260 2 230 13.2 30 250 390 620
390.284090 3-Wire 390.284270 3 230 17.0 45 190 300 470
Max. Cable
Length in Feet –
Disconnect
switch to motor
}
}
Max. Cable
Length in Feet –
Disconnect
switch to motor
*Pumping depth in feet is the maximum distance to water from ground level. This maximum distance (drawdown water level) occurs while pump is operating.
In most cases, when pump is not running, the water level will rise to a higher point in the well.
TABLE II - Fusing, Wiring and Cable Selection (Copper Conductors Only)

INSTALLATION
If depth of well and the distance to the water level in the
well are not known, proceed as follows:
1. Tieanobjectthatwill float to theendofaball of string and
drop it into the well.
2. When float hits water and string becomes slack, mark the
string and pull float from well. Measure distance between
mark and float for the water level in the well.
3. Remove float, replace with a heavy object that will sink in
water and drop it into the well until string becomes slack.
Mark string and pull object from well.
4. Measure distance between mark and object for depth of
well.
Ifdrawdownwaterlevelis not known, set pump 5feetfrom
the bottom of the well.
Basic Tools and Materials Needed
Study Figures 1 thru 3. Figure 1 shows the piping and elec-
trical connections of a submersible pump in a well. Figure 2
shows typical installation of a Sears Captive Air® Tank
System. Figure 3 shows typical installations of a Sears
Standard Air Tank System. These illustrations will help you
determine what materials you will need for piping.
Plastic Pipe Installation
Tools: Knife, Wire Cutters, Pliers, Screwdriver, Hammer,
Adjustable Wrench, Hacksaw, Pipe Wrenches (2).
4
Standard Air Tank Installation Captive Air Tank Installation
®
Power
Cable
Power
Cable
Nylon
Tape
Nylon
Tape
Safety
Rope
Well Seal
(Purchase
Locally)
Conduit or
Sleeve
Cable
Splices
Plastic
Pipe
Adapter*
Plastic Pipe
Adapter*
Pump
Check
Valve
Torque
Arrester
(Purchase
Locally)
Centering
Guide
1178 0794
* Plastic pipe adapter, pipe
clamps, and torque arrester
used only with plastic pipe. Splice Cables
Like This – Not Like This
4"
2 Ft.
Galvanized
Pipe up
through well
seal
Pipe Tee
with Plug Plastic Pipe
Adapter
Pipe
Clamps*
Power
Cable
Nylon
Tape
Safety
Rope
Well Seal
(Purchase
Locally)
Conduit or
Sleeve
Cable
Splices
Plastic
Pipe
Adapter*
Pump
Bleeder
Orificies
Check
Valve
Centering
Guide
Torque
Arrester
(Purchase
Locally)
3 Ft.
To Tank
To Tank
2 Ft.
Plastic Pipe
Adapter
3 Ft.
Pitless
Adapter
Electrical
Service
To Tank
Pitless
Adapter
Electrical
Service
Vent
Sanitary Well Seal Pitless Adapter Sanitary Well Seal
Pitless Adapter
Galvanized
Pipe Galvanized
Pipe
Figure 1: Typical Well Pipe Installations
Pressure
Relief Valve
Stock No. 2720 Pressure
Switch
Stock
No. 2782
Pressure Gauge
Stock No. 2768
Submersible
Pump Manifold Kit
Stock No. 27221
958 0594
To Service
To Pump
Motor
Electrical
Disconnect
Box
Control
Center*
From
Well 12"
Max. 959 0594
To
Service
To Pump
Motor
Electrical
Disconnect
Box
Control
Center*
From
Well 12"
Max. 963 0594
Gate
Valve
Union
Air
Volume
Control
Figure 2: Captive-Air®Pressure Tank Installation
Figure 3: Standard Pressure Tank Installation
† NOTICE: Control Center is used with 3-wire pumps
only. For 2-wire pumps, run cable directly from pres-
sure switch to motor.
Manifold
Detail

INSTALLATION
Materials: PlasticPipeandFittings(asrequiredtocomplete
job); Teflon Tape (DO NOT use pipe joint compound on
plastic fittings); Centering Guides - Stock No. 2724.
Galvanized Steel Pipe Installation
Tools: Knife, Wire Cutters, Pliers, Screwdriver, Hammer,
Adjustable Wrench, Hacksaw, Pipe Wrenches (2), Pipe
Cutting and Threading Tools.
Materials: GalvanizedPipeandFittings(asrequiredtocom-
plete job); Pipe Joint Compound or Teflon Tape; Centering
Guides - Stock No. 2724.
Safety Pressure Relief Valve Stock No. 27220
For your protection, install this pressure relief valve.
Purchase from your local Sears Store.
This relief valve is designed to protect home water systems
fromexcessive pressure. Itis factory presetto start relieving
pressure at 75 PSI (pounds per square inch). Use only on
home water systems with pumps listed in this Owners
Manual.
1. For maximum protection, locate valve within 2 ft. of the
pressure tank.
2. Install valve directly in pipe tee. Do not use any reducers
or pipe extensions. Tee must be located in main pump
supply line to tank. See diagram Page 4.
3. Protect relief valve from freezing, dirt, and any other pos-
sible damage that would cause the valve not to function.
4. Longlengthsofpipeor hose connected to the reliefvalve
dischargeportcan limittheamountofwaterand pressure
that can be relieved. If necessary to pipe away from relief
valve, use minimum 1-1/4” plastic pipe.
5. Protect everything in the immediate area of the relief
valve from water damage in the event the relief valve op-
erates.
Gauge
A Pressure Gauge, Stock No. 2768, can be installed. It will
indicate the pressure at which pump starts and stops and
any pressure in between.
The Motor
The motor is water filled type, and is ready to run as re-
ceived.
Pressure Switch
Install an automatic pressure switch (Stock No. 2782) set to
start pump at 40 Ibs. pressure and stop pump when the sys-
tem pressure reaches 60 Ibs. See Figures 2 and 3, Page 4.
Tank
The tank serves two functions. It provides a reservoir of
water, which can be drawn off through the house fixture.
The tank maintains a cushion of air under pressure. When
tank pressure falls far enough, pump will start.
Twotypesof tanks are available:CaptiveAir® and Standard.
The Air Volume Control (AVC) maintains the cushion of air
in Standard Tanks. No Air Volume Control is needed with a
Captive Air® Tank.
Air Volume Control
A device mounted on a standard tank in order to keep
enough air in the tank to prevent waterlogging the tank.
Operating a water system with no air cushion in the pres-
suretankcancausewaterhammer,rapid pump cycling, and
damage to the system.
Engine–Generators For Submersible Pumps
Listed are the minimum Watt ratings for Engine Generators
required to power your Submersible Pump motor in the
event of an electrical power failure.
Any additional loads, such as lights, must be added to these
loads, and the correct size used.
Be sure your generator is the same voltage as your sub-
mersible motor. See Table II, Page 3.
Overload Protector
Thisisasafetyswitchwhichopenswhenamomentaryshort
or surge of power occurs or when the pump is stuck or
locked with sand. It prevents the motor from burning out.
It is built into the pump motor (2-Wire motors and 1/2
through 1 HP 3-Wire motors) or the Control Center (1-1/2
through 3 HP 3-Wire motors). 1/2 through 1 HP motors au-
tomaticallyrestartafterthemotorcools.Iftheprotectorcon-
tinues to open, the trouble should be located before
continuing operation. 1-1/2 through 3 HP motors must be
manually reset at control center.
Centering Guides
Install centering guides (Stock No. 2724) to keep the pump,
pipe, and electrical cable from coming in contact with the
well casing wall. Purchase separately.
Control Center (3-Wire Pumps only)
The control center contains the electrical equipment (other
than the pressure switch) needed to start and run a 3-Wire
motor. Energy Efficient Control Centers also contain the
overload relay(s) which protect the pump motor from short
circuits or voltage surges.
Mark mounting screw locations on the wall and hang con-
trol center as close to pressure tank as possible. BE SURE to
mount Control Center so that it hangs vertically and is level.
It may not function normally otherwise.
NOTICE: Referencesto“2-Wire”or“3-Wire”motorsreferto
the load-carrying wires running to the motor. All motors
have a ground wire in addition to the load conductors, so
that you will see four wires when looking at a “3-Wire”
5
Pump Minimum Watt
Motor Rating of Generator
HP 3-Wire Motors 2-Wire Motors
1/2 2,000 2,400
3/4 3,000 2,900
1 4,000 –
1-1/2 5,000 –
2 7,500 –
3 10,000 –

ELECTRICAL
motor (3 load conductors plus a ground wire), and three
wires when looking at a “2-Wire” motor (2 load conductors
plus a ground wire). “3-Wire” motors require an electrical
disconnect switch plus a Control Center; “2-Wire” motors
use only an electrical disconnect switch.
WIRING
Hazardous voltage. Can shock burn, or
cause death. Install pump with all electrical wiring
and grounding in accordance with your local electri-
cal code. Install and use pump only in a well application.
Disconnect power before installing pump, pressure switch,
and control center.
Make sure power is off before wiring control center. Follow
wiring diagram, Figures 4 and 5.
Make sure that the line voltage and frequency stamped on
the motor nameplate agree with the voltage and frequency
of the electrical power supply. If in doubt, check with your
electric power company or a licensed electrician.
Check Fusing and Wiring Chart before connecting wires
from pressure switch to electric power. All wiring must
comply with your local electrical code.
See Chart, Page 3.
6
L1 L2 YEL BLK RED
FOR USE WITH ALUMINUM
OR COPPER CONDUCTORS
Power in from
Circuit Breaker
Panel/ Pressure
Switch
Cable to
Motor
Ground
Wire
Ground
Wire
Color-Coded
Motor Leads
Incoming Power
Supply Wires
Strain
Relief
1180 0794
L1 L2 YEL BLK RED
FOR USE WITH ALUMINUM
OR COPPER CONDUCTORS
Overloads
Submersible
Pump Control Center
Energy Efficient
®
Figure 4: Wiring connections for 1-1/2, 2, and 3 HP Energy Efficient Control Centers.
L1 L2 RY B
L1 L2 R Y B
Ground
Connection
Incoming
Power
Supply Power
Cable
to Motor
Strain
Relief
Color-Coded
Motor Leads
1179 0794
Figure 5: Wiring connections 1/2, 3/4, and 1 HP Standard Control Centers.

ELECTRICAL
Surge Protection
For protection against damage caused by high voltage
surges, your motor has built-in surge protectors.
NOTICE: Surgeprotectorswill not protectagainstdirector
near direct lightning strikes!
GROUNDING
Permanently ground all electrical components in accor-
dancewith the National ElectricalCode and applicable local
codes and ordinances. Make a permanent ground using a
conductor of correct size from a grounded lead in the ser-
vice panel or a properly driven and grounded ground rod.
DO NOT ground to a gas supply line. DO NOT connect to
electric power supply until unit is permanently grounded.
If plastic well casing is used in your installation, ground the
metal well cap or well seal, providing electrical leads to the
pump motor go through the well cap or well seal.
The grounding conductor need not be larger than the cir-
cuit conductors supplying the motor providing circuit con-
ductors conform to the wiring data provided in this manual.
CABLE SPLICING
NOTICE: Match colors of wires in cable to colors of wires
coming from motor.
For #14, #12, or #10 Wire Cable Installation
Included in the splice kit are three plastic splice insulators
andfourbuttconnectors;usetwoinsulatorson“2-Wire”mo-
tors and 3 insulators on “3-Wire” motors. The extra con-
nector is for the ground lead. The insulating sleeves can be
used on wire cable sizes #14, #12 and #10. No tape is re-
quiredfor this type ofjoint. To use theinsulators stagger the
pigtail ends of the motor leads and the cable. Cut each lead
about 4" longer than the last one.
Method #1: Soldering (Figure 6).
Staggerthepigtailendsofthemotorleadsandthecable.Cut
each lead about 4" longer than the last one. Trim the insula-
tion back 1/2" on each lead. Unscrew the plastic caps from
the insulator. Place parts on each end of the wire to be
spliced, as shown.
Unscrew the plastic caps from the insulator. Place parts on
each end of the wire to be spliced, as shown in Figure 6.
Thenproceed to splicethe wires. Stripboth wire endsabout
1-1/2''. Be sure the surface is scraped clean. Overlap the two
ends so there is about 1/2” space between the insulation
ends. Twist the wire about 1-1/2 turns. With pliers, wind the
remaining wire on each end closely around the other wire as
shown. Use a soldering iron and a resin core solder or pure
solder with a non-acid soldering paste to solder the joint.
After splicing, center the body of the insulator over the
splice. Slide the neoprene sleeves down into the recesses in
the body as far as they will go. Screw the caps on to the in-
sulator, tightening them securely by hand. This makes a
strong, waterproof splice.
Method #2: Crimptype Connectors (Figure 6)
Staggerthepigtailendsofthemotorleadsandthecable.Cut
each lead about 4" longer than the last one. Trim the insula-
tion back 1/2" on each lead. Unscrew the plastic caps from
the insulator. Place parts on each end of the wire to be
spliced, as shown.
Splice the wires with a butt-type connector using a crimp-
ing tool. After splicing, center the body of the insulator over
the splice. Slide the neoprene sleeves down into the re-
cessesin the body as far as they will go. Screw the caps onto
the insulator, tightening them securely by hand. This makes
a strong waterproof splice.
7
Important Electrical Grounding Information
Hazardous voltage. Can shock, burn,
or kill. To reduce the risk of electri-
cal shock during pump operation, ground and bond the
pump and motor as follows:
A. To reduce risk of electrical shock from metal parts of the as-
sembly other than the pump, bond together all metal parts ac-
cessibleatthe wellhead(including metaldischargepipe,metal
well casing, and the like). Use a metal bonding conductor at
leastas largeas thepower cableconductors runningdownthe
well to the pump's motor.
B. Clamp or weld (or both if necessary) this bonding conductor
to the grounding means provided with the pump, which will
be the equipment-grounding terminal, the grounding conduc-
tor on the pump housing, or an equipment-grounding lead.
The equipment-grounding lead, when provided, will be the
conductor having green insulation; it may also have one or
more yellow stripes.
C.Ground the pump, motor, and any metallic conduit that car-
riespowercable conductors.Groundthese backtotheservice
byconnectinga copperconductorfrom thepump,motor,and
conduit to the grounding screw provided within the supply-
connectionbox wiringcompartment.This conductormust be
at least as large as the circuit conductors supplying the pump.
Save these instructions.
End Caps
Gaskets
Wire Ends Ready to Splice:
Strip 1/2" back for crimp-type connectors
Strip 1-1/2" back for soldered connection
Wire Spliced (Crimped)
Insulator body
centered
over splice
Gasket sleeve
in place
Cap screwed on
Wire Spliced (Soldered)
1182 0794
Figure 6: Crimped splice and soldered splice.

ELECTRICAL / PIPING INSTALLATION
Method #3: Cable Splicing for #8 Wire Cable
(Splice to #10 or smaller wire ONLY)
1. Remove 3/8” insulation from end of motor pigtail leads
and from drop cable leads.
2. Place heat shrink tubing over motor pigtail leads.
3. Insert leads into butt connector and crimp with crimping
tool. Pull leads to check connection.
4. Center tubing over butt connector and apply heat with a
propane torch (a match or lighter will not supply enough
heat).
NOTICE: Keep torch moving; too much concentrated
heat in one place will ruin tubing and may damage wires.
5. When tubing begins to shrink, increase concentration of
heatatcenter oftube.Ascenteroftube collapsesonwire,
work heat out to each end until entire tube is collapsed
tight around wire.
"Do It Yourself" Installation with polyethy-
lene plastic pipe
(For Installation of Steel Pipe, See Pages 10 & 11)
This "Proven" Do-lt-Yourself Installation section is intended
to help anyone installing Sears Submersible pumps. If these
simple instructions are followed, you will have a successful
and professional installation that will last as long as there is
water in the welI.
Polyethylene Pipe is recommended in all "Do-lt-Yourself" in-
stallations. Steel pipe weighs 12 times as much as plastic
pipe and special equipment is required. 100 PSI plastic pipe
can be used to depths of 100'. 160 PSI plastic pipe can be
used to depths of 220'.
The depth and the drawdown level of a new well can be ob-
tained from the well driller. The drawdown water level is
the lowest level to which the water in the well will drop
while being pumped.
NOTICE: Ifthereisachancethatpumpcanoverpumpwell,
install a Sears Pump Guard (Stock No. 2720) to prevent run-
ning pump dry.
If depth of well and the distance to the water level in the
well are not known, See page 4. The pump should not be
setcloserthan5feetfromthebottomofthewellandshould
be submerged 15 to 20 feet below the draw down water
level. If the draw down water level is not known, set the
pump 5 feet from the bottom of the well.
Install centering guides (purchase from Sears—Stock No.
2724). These are used to keep pump, pipe and electrical
cable centered in the well.
NOTICE: Installatorque protector (available locally)to pro-
tect pipe from twisting damage due to motor starting.
To prevent dropping anything into the well, keep the top of
the casing covered.
Lay pump near the well, discharge end pointing outward.
Also lay out the well seal or pitless adapter if used, plastic
pipe, safety rope, hose clamps, centering guides, tape, elec-
trical cable and tools. If this is a standard pressure tank in-
stallation, also lay out the bleeder orifice piping as shown in
Figure 8 (below) and Figure 1 on Page 4.
NOTE: Thebleederorifices,checkvalveandairvolumecon-
trol (for standard tanks) are not furnished. A special Air
Volume Control Kit containing these parts is available from
Sears Product Service, 1-800-366-7278. Not needed with
Captive Air® tank.
For 1" piping, order Kit No. 2770.
For 1-l/4” and 1-l/2" pipe, order Kit No. 2756.
Assembly of all components that go into the well should be
made horizontally on the ground and then lowered into
well.
1. Installanylon adapterinthepumpdischargetapping. Use
Teflon tape on male threads only.
2. Unroll the plastic pipe in a line away from the pump. Be
sure the ground is smooth so as not to damage the pipe
or electrical cable.
3. Cut off sealed ends of plastic pipe. Use a sharp knife or
hacksaw.
8
Wire Ends Ready to Splice:
Strip 1/2" back for crimp-type connectors
Wire Spliced (Crimped)
Heat-shrink tubing
Heat with torch:
1. Keep the heat moving.
2. Don't overheat. 1181 0794
Figure 7: Heat-Shrink Splicing.
1186 0794
Figure 8

PIPING INSTALLATION
4.Trim centering guides if necessary. Centering guides will
fit 6 inch or larger well casings and 1 inch drop pipe. For
4or5 inchcasings,theoutsidetabsmust betrimmedwith
ahacksawor knife.Seemarksontabs.For droppipesizes
1-1/4 and 1-1/2 inch, inside hole of guide must be
trimmed. See marks on guide. NOTE: Do not cut hole
oversize. A snug fit works best.
5. Slide centering guides on the plastic pipe. First guide
should be located about 6 inches above the pump dis-
charge connection. Additional guides should be located
at equal intervals on the plastic pipe.
After placing first guide about 6 inches above the dis-
charge connection, place a stainless steel hose clamp
above the guide. This will prevent guide from sliding up
pipe as pump is lowered in well. On other guides, place
clamp above and below it to maintain position.
6. Slide plastic pipe on to the nylon adapter until it is up to
the shoulder on the adapter. Clamp pipe to adapter with
2stainlesssteel hoseclamps.Placethescrewmechanisms
onclampsopposite eachother.Tapedownexcesslength
of hose clamp band.
7. Feed motor leads through the first centering guide. Make
electriccablesplicesaccordingtochoiceson Pages 7 and
8. Stagger the splices by cutting one lead about 4 inches
longerthanthe otherone.Tapesplicestothe plasticpipe.
Notethatstaggering preventsthesplicesfromrubbingon
the well casing.
8. Unroll the balance of the electrical cable along side of
plastic pipe. Be sure not to damage the insulation or kink
the wire. Now go back and feed the cable through the
centering guides located along the pipe.
9. If necessary, cut plastic pipe shorter than proper depth
setting to allow for bleeder orifice piping assembly or dis-
tance down to your pitless adapter.
10.Ifastandardpressuretank system is being used, make up
bleeder orifice assembly as shown in installation draw-
ings (Figure 1, Page 4). Using teflon tape on all male
threads. Assemble this unit to the plastic pipe in same
manner as outlined in Step 6.
Assembly may slip through well seal.
Install an elbow on the pipe above the well seal. This
safety measure will prevent dropping the pipe and pump
into the well when lowering it.
11.If a Captive Air® pressure tank system is being used, as-
semble as shown in the typical pump installation with
Captive Air® Tank (Figure 1, Page 4). Note that bleeder
orifices and check valves are not used.
12.If well seal is used, assemble safety ring in bottom part of
the seal.
13.At about every five feet, tape electrical cable to the pipe
(Figure 9). Use 1-1/2 to 2 wraps of tape. This will allow
some freedom of cable movement to allow for stretch of
the plastic pipe. Leave a surplus of electrical cable at the
top for splicing purposes. Surplus can be neatly tucked
into top of well casing.
14.Tie safety rope to pump discharge casting in holes pro-
vided. Thread the rope through the centering guides. It
is not necessary to tape rope to the pipe. Remove as
much slack as practical and tie to ring in well seal or well
cap in the case of a pitless adapter.
Risk of cable damage and electrical
shock. Never support the weight of the pump and pipe
ontheelectrical cable.Usethedroppipefor thispurpose.
Protectthe cable from damagewhen lowering the unitin
the well.
15.To lower the pump into the well will require one person
at the well doing the actual lowering, and another at the
topendof the assembly. Standas close as possibleto well
and lower the unit. (Figure 10).
Do not rub the pipe or electrical cable on the top of the
casing.Thesecond personwillbringtheassemblytoward
the well during the lowering process. Clean off any ma-
terial picked up from the ground as you lower.
16.If this is a well seal installation, wiring can be completed
after well seal is in place. If this is a pitless adapter in-
stallation, make final splice at time of well development
or when pitless adapter connection has been made.
9
Figure 9
Figure 10

INSTALLATION
17.Develop the well – See "Well Development and Pump
Test”.
18.Beforepiping up a Captive Air® Tank, be certain air pres-
sure in tank is the same as the cut-in pressure of the pres-
sure switch. For additional information, see instructions
on tank or in the tank owners manual. Complete piping
to pressure tank.
Installation with Steel Pipe
1. Read the "Do It Yourself Installation with Plastic
Pipe" section first. Information on the following items
will be found there:
Depth to water Well Depth
Drawdown Proper Pump Setting
Centering Guides Electrical Cable Splicing
Testing the Pump Pressure Tanks
2. Screwalength ofgalvanizedpipeintodischargeof pump.
3. With the pump and pipe in vertical position, tape cable
to pipe just above and below the splice connections.
4. Lower pump into well and tape cable to pipe every 10'
with plastic tape. For easy and safe handling in lowering
pumpintowell,itisadvisableto use a tripod with a block
and tackle. A pipe holder should always be used to sup-
port the assembly on top of the well casing while making
up the next length of pipe. See Figure 11 below.
Risk of cable damage and electrical
shock. Never support the weight of the pump and pipe
ontheelectrical cable.Usethedroppipefor thispurpose.
Protectthe cable from damagewhen lowering the unitin
the well.
5. Addsufficientlength ofpipetothepumpdischarge, using
pipe joint compound on male threads, until the pump is
at the proper setting.
The pump should not be set closer than 5 feet from the
bottomandshould be submerged 15to20 feet below the
draw down water level. If drawdown level is not known,
set the pump 5 feet from the bottom of the well.
6. Develop the well – See "Well Development and Pump
Test," below.
7. Refer to Typical Pump Installation Drawings for
proper method of piping depending on the type of pres-
sure tank used.
Well development and pump test
Properwelldevelopmentwillnormallyclearoutallsolidma-
terials in the well water. It will also tell you if the well is ca-
pable of supplying the full capacity of the pump. If you are
not certain of the draw down water level in your well, this
can also be measured after pumping at maximum flow for a
period of time.
Well development simply means pumping at very low flow
ratetostartwithandgraduallyincreasingtheflowtoitsmax-
imum. The quality of the water must be visually checked
throughout the procedure.
Theamountoftimespentonwell development will vary de-
pending on the condition of the water. Allow yourself at
least 2 hours continuous running and do not become
alarmed if it takes 4, 5 or more hours to clear up the water.
This well development procedure will assure you of long,
no-pump wear, trouble free operation.
Do not start pump with discharge open unless this de-
velopment procedure has been done and well is clear.
1. Connect temporary piping as shown in Figure 12, below.
This includes a gate valve for flow regulation.
2. Connect motor leads and electric power supply. See
Figures 4 and 5, Page 6.
Do not start pump yet!
3. Close the gate valve and then carefully open slightly to
allow a small amount of water to be pumped.
You can now start your pump!
Low flow will not harm your pump. With the gate valve
10
Control
center
or
electrical
d
isconnect
box
Temporary wiring
to control center or
electrical disconnect box
Temporary piping
Gate valve
Pump in well
Pump installation
for developing a well
689 0993
PIPE
CLAMP
TRIPOD
WELL CASING
BLOCK
AND TACKLE
PIPE
PIPE HOLDER
724 0993
Figure 11 Figure 12

INSTALLATION
set in this position, allow water to be pumped on the
grounduntilit iscompletelyclearofsolidssuch assiltand
sand. This can be checked by catching some water in a
glass container and waiting a period of time to let the
solids in the water settle to the bottom of the container.
Whenthewater completelyclears,openthevalveseveral
turns to increase the flow rate and repeat the checking
procedure for solids.
Continue the flow-checking procedure until the valve is
completely open and water is free of solids.
4. Turnoffelectric powerandremovetemporarypipingand
wiring. Proceed with final installation.
Pitless Adapter
Followinstructionsincludedwithyourpitlessadapterforin-
stallation.
Well Seal
Tighten the 4 bolts on the well seal, thus compressing the
rubbersealingmemberandsealingthewellcasing,thedrop
pipe and the cable conduit. A conduit fitting should be used
in order to seal the cable at the top of the well seal. Install
an air vent in the third opening in the sanitary well seal as
shown in the diagrams, Figure 1, Page 4.
Complete Installation and Check Operation
At this point the necessary piping to complete this installa-
tion to the tank should be added.
Forsuggestedmethodsofpipingtothetank,refertoFigures
2 and 3, Page 4, for the pressure tank system being installed.
Where the tank and controls are installed in a basement or
at another location away from the well, it is necessary that
the pipe leading from the tank back to the well be buried
below the frost line to prevent freezing.
When all connections have been made, the pump is ready
for operation.
Turn on switch. The pressure switch will stop the pump at
60 PSI, and will allow it to start again when enough water
has been drawn to reduce the water system pressure to 40
PSI. This can be checked by opening a faucet and drawing
water until the pump starts again.
NOTICE: Be sure there is no excessive sand in the water.
Sears, Roebuck and Co. and the manufacturer cannot be re-
sponsible for damage to the pump and motor caused by ex-
cessive sand. (See Well Development.)
NOTICE:Ifthere is a chance thepumpcanover-pump well,
installa Pump Guard (Stock No. 2720) toprotect against dry
running.
11
Trouble Causes Remedies
Little or no water A. Water level in a low producing well A. Lower pump further into well, but make sure it is at least five feet above well bottom.
delivered. drops too low while pump is operating, Install a valve in discharge pipe between pump and pressure tank.
causing air lock, loss of prime and Use valve to restrict flow until discharge rate does not exceed well recovery rate.
possibly seriously damaging pump. To prevent possibility of dangerous high pressure, install a
relief valve in discharge pipe between pump and flow restriction valve.
Relief valve must be capable of passing full pump flow at 75 PSI.
B. Intake screen partially plugged. B. Lime or other matter in water may build up on screen.
Pull pump and clean screen.
C. Check valve(s) may be stuck. C. Make sure that built-in check valve in pump and any check valves in
discharge line are free to open properly.
D. Voltage too low; motor will run D. Have a competent electrician verify voltage at electrical disconnect box (2-Wire)
slowly, causing low discharge pressure or control center (3-Wire) while pump is operating. If voltage is low, power company
(head) and high operating current draw. may need to raise it or installation may require larger wire. Discuss with power
company or licensed electrician.
E.
Standard tanks only : check valve E. Examine check valve; if stuck free it. If installed backwards (arrow on valve
above bleeder orifice assembly may body will show direction of flow), reverse it. If valve is defective, replace it with a
be stuck or installed backwards. new one.
F. Impellers or diffusers worn due to F. Pull pump and return to Sears for service. Before reinstalling
sand or abrasives in water or run- pump, sandy or gaseous conditions in well must be corrected.
ning pump while it is air/gas-locked.
Air or milky water A. Air volume control not functioning, A. Replace air volume control if necessary.
discharges causing air to build up in tank.
from faucets. B. Well water may be gaseous. B. If your well is naturally gaseous and your system has a standard tank, remove the bleeder
orifices and plug the tees. If condition is serious, check with competent well professionals.
Pump starts too A. Leak in pressure tank or plumbing. A. Check all connections with soapsuds for air leaks. Fix any leaks you find. Check
frequently. plumbing for water leaks. Fix any leaks you find.
B. Pressure switch defective or out of B. If necessary, replace switch.
adjustment.
C. Check valve leaking. C. Inspect valves and replace if necessary.
D. Tank waterlogged. D. Captive Air®Tanks: Check tank for leaks; correct if possible. Recharge tanks to 20 PSI
with a 20-40 PSI switch, 30 PSI for a 30-50 PSI switch, 40 PSI for a 40-60 PSI switch, etc.
Standard Tanks: Check tank for leaks; correct if possible. Check bleeder orfices and clean
bleeders; replace if necessary.
E. Drop pipe leaking. E. Raise one length of pipe at a time until leak is found. When water stands in pipe, there is no
leak below that point.
F. Pressure switch is too far from tank. F. Move pressure switch to within one foot of tank.
HELPFUL HINTS – TROUBLES, CAUSES & REMEDIES

HELPFUL HINTS – TROUBLES, CAUSES & REMEDIES
12
Trouble Causes Remedies
Fuses blow or A. Fuses or wires too small. A. Replace with correct sizes (see Table II, Page 3).
overload protector B. Low or high voltage. B. While motor is running, voltage should not exceed plus 10% or minus 5%
trips when motor of rated voltage shown on motor nameplate. Call electric power company
starts. to adjust line voltage if it is not within these limits.
C. Motor stuck or binding (abrasive C. Pull pump and clean it. Before reinstalling pump, clean well carefully (see Page 10)
material, such as sand, may lock for well development procedure). If necessary, clean well carefully with sand
pump). pump or by bailing.
NOTICE: If well is sandy or dirty and cannot be cleaned or a suitable sand
screen installed, do not reinstall pump.
D. Cable splices or motor windings D. Consult competent electrician or service technician.
grounded, shortened, or open.
E.
3-Wire only: Cable leads may be improp- E. Check wiring diagram on control center panel (also see Figures 4 and 5,
erly connected in control center. Page 6, in this manual) and color coding of drop cable.
F.
3-Wire only: There may be a F. Have a competent electrician examine all connections and wiring
broken wire in the control center. in control panel. If necessary, repair them.
G.
3-Wire only: Starting or running G. Inspect capacitors (see Figures 4 and 5, Page 6). Have competent
capacitor in control center may be electrician check capacitors. Replace if necessary.
defective or vented (blown out). Hazardous voltage. Can shock, burn, or cause death.
Capacitors may still carry voltage charges even after being disconnected
from wiring. Have them checked by a competent electrician.
A. No voltage to motor. A. With voltmeter check 1) fuse box to make sure full voltage is available; 2) pressure
switch terminals, to make sure pressure switch is passing voltage correctly;
and 3) terminal strips in control center or disconnect switch box to make sure
voltage is available there. 1-1/2 through 3 HP: Push red overload reset button(s)
on bottom of control center.
B. Cable splices or motor windings may be B. Consult competent electrician or service technician.
grounded, shorted, or open-circuited.
Do not attempt to disassemble pump or motor.
C. Open circuit in control center (3-wire C. Examine all connections and wires; examine terminal strips in
only); faulty connections; faulty wires. control center (3-wire only); repair if necessary.
D. Faulty pressure switch. D. Check pressure switch; replace if necessary.
E.
3-Wire only: Cable leads improperly E. Check wiring diagram on control center panel (also see Figures 4 and 5,
connected in control center. Page 6, in this manual) and color coding of drop cable.
Pressure switch fails A. Voltage too low; motor will run slowly, A. Have a competent electrician verify voltage at electrical disconnect box (2-wire) or
to shut off pump. causing low discharge pressure (head) control center (3-wire) while pump is operating. If voltage is low, power company may
and high operating current draw. need to raise it or installation may require larger wire. Discuss with power company
or licensed electrician. Check voltage with a recording meter if trouble reoccurs.
B. Faulty pressure switch. B. Replace switch.
C. Impellers or diffusers worn (due to C. Adjust switch to allow for reduced pressure coming from pump. If
sand or abrasives in water or running adjustment does not solve problem, it may be necessary to replace
pump while it is air- or gas-locked) to pump. If well water contains enough sand to cause undue wear on
the point that pump does not develop the pump, clean out well or install a suitable sand screen before
sufficient pressure to activate switch. reinstalling pump. See “Well Development”, Page 10.
D. Drop pipe leaking. D. Raise one length of pipe at a time until leak is found. When water
stands in pipe, there is no leak below that point.
E. Water level in well may become too E. Lower pump further into well, but make sure it is at least five feet above well bottom.
low when pump is running. Install a valve in discharge pipe between pump and pressure tank. Use valve to
restrict flow until discharge rate does not exceed well recovery rate.
To prevent possibility of dangerous high pressure, install a
relief valve in discharge pipe between pump and flow restriction valve.
Relief valve must be capable of passing full pump flow at 75 PSI.
Fuses blow or A. Low or high voltage. A. While motor is running, voltage should not exceed plus 10% or minus 5% of rated
overload protector voltage shown on motor nameplate. Call Power company to adjust line voltage
trips when motor if it is not within these limits.
is running. B.
3-Wire only: High ambient B. Make sure control center is installed out of direct sunlight.
(atmospheric) temperature.
C.
3-Wire only: Control Center wrong C. Compare horsepower and voltage rating of motor (from motor nameplate) with those
horsepower or voltage for installation. of control center (from control center nameplate). These numbers must match.
D. Wire size too small. improperly D. See Table II, Page 3, and make sure wire size matches
connected in control center. specifications in table.
E. Cable splices or motor windings E. Consult competent electrician or service technician to determine
may be grounded, shorted or if this is the cause of the problem or not.
open-circuited.
Do not attempt to disassemble pump or motor.
Motor will not start but
does not blow fuses.
Hazardous voltage.
Can shock, burn,
or cause death.
Only competent electri-
cians should work on
electrical service.

CONTROL CENTER REPAIR PARTS
13
FOR USE WITH ALUMINUM
OR COPPER CONDUCTORS
L1 L2 YEL BLK RED
4
5
7
6
1
1184 0794
Submersible
Pump Control Center
Energy Efficient
®
L1 L2 R Y
1
3
2
230V/60Hz/1Ph
Standard Energy Efficient
1/2 HP 3/4 HP 1 HP 1-1/2 HP 2 HP 3 HP
Key. Model Model Model Model Model Model Part
No. 390.284120 390.284130 390.284140 390.284250 390.284260 390.284270 Description
1 U17-1172 U17-1173 U17-1174 U17-1174 U17-1174 U17-1175 Start Capacitor
2 U17-1184 U17-1185 U17-1186 – – – Solid State Switch
3 U17-1201 U17-1201 U17-1201 – – – Terminal Strip
4 – – – U17-1190 U17-1191 U17-1192 Start Overload
5 – – – – U17-1194 U17-1196 Run Overload
6 – – – U17-1187 U17-1187 U17-1187 Voltage Relay
7 – – – U17-1177 U17-1178 U17-1179 Run Capacitor
Standard Control Center
Repair Parts
390.284120
390.284130
390.284140
Energy EfficientControl Center
Repair Parts
390.284250
390.284260
390.284270
REPAIR PARTS LIST
To order parts, call
Sears Product Service,
1-800-366-7278

SUBMERSIBLE PUMPS REPAIR PARTS
14
1
2
3
45
6
7
8
1185 0794
2-Wire Model Nos:
390.285510
390.285520
390.285530
3-Wire Model Nos:
390.284020
390.284030
390.284040
390.284050
3/4HP/230V
1/2HP/115V 1/2HP/230V 1/2HP/230V Model 1HP/230V 1-1/2HP/230V
Key. Model Model Model 390.285530 Model Model Part
No. 390.285510 390.285520 390.284020 390.284030 390.284040 390.284050 Description
1 P364-23 P364-23 P364-23 P364-24 P364-25 P364-26 Liquid End Assembly –
Complete
2 U36-197SS U36-197SS U36-197SS U36-197SS U36-197SS U36-197SS Nut - 5/16 Hex (4 Required)
3 U43-115SS U43-115SS U43-115SS U43-115SS U43-115SS U43-115SS Lockwasher – 5/16 (4 Required)
4 P3-510P P3-510P P3-510P P3-511P P3-512P P3-513P Lead Cover
5 U30-840SS U30-840SS U30-840SS U30-840SS U30-840SS U30-840SS Screw #8-32x5/16 (4 Required)
6 U30-927SS U30-927SS U30-927SS U30-927SS U30-927SS U30-927SS Screw #8-32x1/2” (2 Required)
7 P8-20 P8-20 P8-20 P8-20 P8-20 P8-20 Suction Screen
8 P564-31 P564-32 – P564-33 – – Motor (2-Wire)
8 – – P564-24 P564-26 P564-27 P564-28 Motor (3-Wire)
• F642-9410 F642-9410 F642-9410 F642-9410 F642-9410 F642-9410 Owner’s Manual
• Not Illustrated.
REPAIR PARTS LIST
To order parts, call
Sears Product Service,
1-800-366-7278

SUBMERSIBLE PUMPS REPAIR PARTS
15
1HP/230V 1-1/2HP/230V 2HP/230V 3HP/230V
Key Model Model Model Model Part
No. 390.284060 390.284070 390.28480 390.28490 Description
1 P364-27 P364-28 P364-29 P364-30 Liquid End Assembly – Complete
2 U36-197SS U36-197SS U36-197SS U36-197SS Nut - 5/16 Hex (4 Required)
3 U43-115SS U43-115SS U43-115SS U43-115SS Lockwasher – 5/16 (4 Required)
4 P3-517P P3-518P P3-519P P3-546SS Lead Cover
5 U30-840SS U30-840SS U30-840SS U30-840SS Screw #8-32x5/16 (4 Required)
6 U30-927SS U30-927SS U30-927SS U30-927SS Screw #8-32x1/2” (2 Required)
7 P8-20 P8-20 P8-20 P8-20 Suction Screen
8 P564-27 P564-28 P564-29 P564-30 Motor
• F642-9410 F642-9410 F642-9410 F642-9410 Owner’s Manual
1
2
3
45
6
7
8
3-Wire Model Nos:
390.284060
390.284070
390.284080
390.284090
• Not Illustrated.
REPAIR PARTS LIST
To order parts, call
Sears Product Service,
1-800-366-7278

Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
OWNER’S
MANUAL
3-WIRE SUBMERSIBLE
PUMP MODEL Nos.
390.284020 390.284060
390.284030 390.284070
390.284040 390.284080
390.284050 390.284090
CONTROL CENTER Nos.
390.284120 390.284250
390.284130 390.284260
390.284140 390.284270
2-WIRE SUBMERSIBLE
PUMP MODEL Nos.
390.285510
390.285520
390.285530
The model number of
your Submersible Pump
will be found on a plate
attached to the pump.
When requesting service
or ordering parts, always
give the following
information:
• Product Type
• Model Number
• Part Number
• Part Description
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
TWO and THREE WIRE
SUBMERSIBLE PUMP