Craftsman 390252100, 390252159, 3902521 Owner’s Manual

SEARS

OWNER'S

MANUAL

MODEL NO.

390.2521

I:RI:IFTSMI:IN°

PROFESSIONAL

CAUTION:

Read and Follow

All Safety Rulesand
Operating Instructions

Before FirstUse of

ThisProduct.

Save This Manual For
FutureReference.

Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

PRINTED IN USA Form No F642-04075 (8/3/o4)

1/2 HP SHALLOW WELL

WATER SYSTEM

• Safety Instructions

• Installation

• Electrical

• Maintenance

• Repair Parts

CONTENTS

INTRODUCTION/WARRANTY 2
PUMP PERFORS*L_CE 3

bL_JOR COMPONENTS 3
INST.M.L__TION 4-5

ELECTRIC.M. 6-7
OPERATION

Please read our mstructions before mstallmg and usmg }'our
Shallow Well Water System Tilts will help you obtain the
full benefits of the qua]ity and convenience budt into this
equipment It wall also help you avoid any needless setaace

expense resulting from causes beyond our control which are
not covered by our warranty

INTRODUCTION

MAINTEN?O,rCE 8-10
HELPFUL HINTS 10

TROUBLESHOOTING GUIDE 11
REPAIR P.M/TS . 12-14

FULL ONE YEAR WARRANTY ON CRAFTSMAN* WELL PUMP

Forone yearfrom thedate ofpurclmse, Searswit1repalror replacewed pump, _ee ofcharge, ffdefecove _ _ or _p

UMITED WARRANTY ON CRAFTSMAN* PROFESSIONAL HYDRO-GLASS ®WELL PUMP

Afterone yezrandthroughthree yearsfrom dxedate ofp_ Sears_ furnish,fxeeofctme_ areplacemempartfor anyd_fecttve part You paylabor

FULL FIVE YEAR WARRANTY ON CRAFTSMAN ®CAPTIVE AIR TANK

Forf_'e yearnfrom date o_purctm_ SearswdI repair_ replace die tank,free ofc_, ff_ m_ _ wor_s_
Tlm _xwamy does notcover repairs or replacementpartsnece-_a_-becauseof abuseor negligence,including_a_uretoin.staR,ad/ttst andolxtat¢ thts pump

according to the instructiomlatheov.mersmanual.

LIMITATION OF UABIMTY

SFJ_d WILL .NOT BE LLABZE _OR LOSS 0£ DAMAGE TO PROPERLY OR ANY L,VCIDENTAL OR CONSEQt.rF.I,FIIAL LOSS OR EXPE.¥SE FROM PROPERTY

DAMAGE DUE DZREOT_ }"OR I3_tT.ECrL Y FROM THE USE OF THIS PRODS,

Some smms do not allow the exclusion or limitaT_on ofmctdeafai or consequential _ages, so the above limitauon or exclusion may not apply to you

WARR_#t TY SERVICE 1S A I*AIL4B LE B Y $g_IPL Y CONrACTING THE _ S_-AR$ SERVICE CEN'IZ_DEPARTME NI"IN THE UA'ITED STA TE£

Tluswarrant,apphesonlywhde thisproductismtheUnitedStates
Tlaswarran_g_vesyouspect_legaIrigims,andyoumayalsohaveotherrightswhmhvat fromstatetostate

Sears, Roebuck and Co., Dept. 617_€A, Hoffman Estates, IL 60179

READ AND FOLLOW SAFETY INSTRUCTIONS!

Carefully read and follow all safety instructions in this
nmnual or on pump.

_k This is the safety alert s3m-tbol. XX'hen you see ttus

symbol on your pump or m this manual, took for one

of tbe following stgna] words and be alert to the potential
for persona] mlury_

warns about hazards that will cause senous

persona] mjury, death or malor property damage ff ignored

[A WARNING_warns about bazards that will or can cause se-

nous personal mlury, death or malor propert 3" damage ff ig-
nored

_ warns about hazards that will or can cause

minor personal mlu_ "or property damage ff ignored
The word NOTICE indicates specml instructions which are

tmportant but not related to hazards

_it CAUTION J Never run pump dtT Running pump without

water may cause pump to overheat, damaging seal and pos-
sibly causing bums to persons handling pump Fill pump

with water before starting

[AWARNING] Never run pump against closed discharge.

To do so can boil water inside pump, causing hazardous

pressure in uniL risk of explosion and possibly scalding
persons handling pump.

_ Motor normaUy operates at tugb temperature

and will be too hot to touch It ts protected from heat dam-
age dunng operation by an automatic internal cutoffswltch
Before handhng pump or motor, stop motor and allow to

cool for 20 minutes

1 To avotd nsk of serious boddy injury and propert3." dam-

age, read safety tostructions carefully before lostallmg
pump

2 FoUow local and/or natmnal plumbing and elecmcal

codes when installing pump

3 Keep well covered whde iastalhng pump to prevent

leaves and other debns from falling into well, con-
tammatmg weU and posstbly damaging pump

4 Protect pump and ptpmg &stem from freezmg Allo,_ang

pump or water system to freeze could severely damage
pump and vmds warran D,

I_kWARNING_JTo avoid serious injury and equip-

ment damage, limit system pressure to 100 pounds

per square inch (PSI) or below at all times. Over-

pressure can cause tank blo_atp; install relief valve

capable of passing full pump volume at 100 PSI.

5 ",Xqth a new well test well for purity before use Consult

local Health Department for procedure

i m

[akWARNING]Hazardous voltage. Can shock, burn,

cause death, or start fires.

2

SAFETY INSTRUCTIONS (Continued)

6. Disconnect electrical power source before installing or
working on pump.

7. Ground pump with a ground wJ_e run from grounding

lug on motor to a grounded lead in the service panel.

TABLE I - Pump Performance (In Gallons per Minute)

NOTE: This system is designed for pumping depths of 20 feet or Jess.

8. Line voltage and frequency of electrical power supply
must agree with motor nameplate.

9. Use of fuses or wire smaller than size recommended in
owner's manual can cause overheating, possible fires,

and will void warranty.

Pump

Model

Description Suct. Disch.

390.2521 1/2 HP S.W Jet 1-1/4" 1" 40

BASIC TOOLS AND MATERIALS NEEDED

Plastic Pipe Installation

Tools

Pipe Wrenches
Screwdriver

Knife or Saw to Cut Plastic Pipe

Tire Pressure Gauge

Materials

Plastic Pipe and Fittings (as required to complete job).

Teflon Tape (DO NOT use joint compound on plastic fittings).

Galvanized Steel Pipe Installation

Tools

Pipe Wrenches

Screwdriver
Pipe Cutting and Threading Tools
Tire Pressure Gauge

Materials

Galvanized Pipe and Fittings (as required to complete job).

Pipe Joint Compound or Teflon Tape

Discharge Pumping Depth in Feet

Pressure PSI 5' 10' 15' 20'

8.2 7.3 6.2 5.0

MAJOR COMPONENTS AND WHAT THEY DO

Impeller and Jet

Impeller turns with motor shaft, causing water to fly out
from its rim by centrifugal force. Impeller rotation creates a

vacuum which pulls in more water. Part of the water is di-
verted back to the jet where it passes through the nozzle and

venturi. This creates more vacuum to draw in more water.

In shallow wells (less than 20 feet deep), the vacuum cre-
ated at the pump is enough to pull water to the pump.

Therefore, for shallow well use the jet is built into the pmnp.

Pre-Charged Tank

The tank serves two functions. It provides a reservoir of
water under pressure and maintains a cushion of air pres-

sure to prevent pipe hammering and possible damage to
plumbing components. When water is drawn off through
the house fixtures, the pressure in the tank is lowered and

the pump starts,

Pressure Switch

The pressure switch provides for automatic operation.
Pump starts when pressure drops to 40 pounds and stops

when pressure reaches 60 pounds.

Check Valve or Foot Valve

This pump is equipped with a buik:m check valve. Install a
check valve as close to well as possible on well point in-

stallations. A foot valve must be installed in the well on dug
or cased wells. See Figures 2A and 2B, Page 4. For long hor-

izontal pipe runs, install check valve as close to well as pos-
sible (all types of wells).

3

INSTALLATION

INSTALLATION

Piping in the Well

The Shallow Well Water System can be installed on a dug
well, drilled well or with a driven point. In a dug or cased
well, a foot valve and strainer should be installed for easy
priming. It should be installed five to ten feet below the low-
est level to which the water vdll drop while the pump is op-

erating (pumping water level). To keep sediment from
clogging the strainer, be sure it is five to ten feet above the
bottom of the well. Before installing the foot valve, make

sure that it works freely.

When using a foot valve, a priming tee and plug as shown in

Figure 1, are recommended.

Priming Plug,
PrimingTee

(UserSupplied)

From

Well

For a pump at sea level mounted directly over the well, be
sure the total lift from the pumping water level to the pump
does not exceed 20 feet. This will be less if the pump is off-

set from the well.
The maximum lift of any pump decreases at the rate of about

1' less lift for every 1,000 feet of elevation above sea level.

For example, at Denver, Colorado 0Elev. 5,000') the pump
loses five feet of lift. The maximum depth from which it
would pump water would therefore be 15 feet.

Well Seal

Plastic Pipe

and Strainer

Figure I

When installed on a driven point well, your Shallow Well
Water System should have a check valve installed as shown

in Figure 2A.

[_eck Valve

t Steel Drive Pipe

;11 1293

Dug or Cased Well

Figure 2B

PUMP/TANK INSTALLATION

Pump

NOTICE: Use Teflon tape supplied with the pump or Plasto-

Joint Stik' for making all pipe-thread connections to the

pump itself. To avoid stress-crocking, do not use pipe joint
compounds on the pump.

1. Wrap male pipe threads being attached to pump with
one or two layers of Teflon tape. Cover entire threaded

portion of pipe.

2. Do not overtighten threaded fittings in the plastic pump.
Be sure you do not try to tighten joint past thread stop

in pump port!

3. Ifleaks occur, remove fittings, clean offold tape, rewrap
with two to three layers of tape and remake the con-

nection. If joint still leaks, replace the fittings (fittings
may be undersized).

4. Be sure to support all piping connected to the System.

_Lake Chemical Co., Chicago, Illinois

D,.__dvecoupling

Well point

Figure 2A _ Driven point

Horizontal Piping from Well to Pump

When the pump is offset more than 25 feet from the well,

horizontal suction pipe size should be increased to reduce
friction losses. Never install a suction pipe that is smaller

than the suction tapping of the pump.

4

INSTALLATION

1-1/4" 1-1/2" 2"

Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft.

Discharge Pipe Sizes

When the pttmp is some distance from the house or point

of water use, the discharge pipe size should be increased to
reduce pressure losses caused by friction.

1" 1-1/4" 1-1/2"

Up to 25 Ft. 25 to 1O0Ft. 1O0 to 600 Ft.

Tank

Tanks are pre-charged with 40 PSI air pressure at the factory.

Your tank requires an air charge of 40 pounds per square

inch (PSI) for proper operation; check tank pressure with
tire gauge to determine ff air charge needs adjustment. Tank

pre-charge shonld be checked annually; see instructions at

right.

In areas where the temperature is high for long periods of
time, the tank pre-charge pressure may increase. This may

reduce the tank drawdown (amount of water available per
cycle). If this occurs, reduce the pre-charge pressure to two
PSI below the pump cut-in setting of the pressure switch

(normally to 38 PSD.
It is necessary to flush all air out of the piping system and

water reservoir portion of the pre-charged tank. This is re-

quired on new installations, pumps requiring repriming and
pumps that have been disassembled for service. Do this as

follows:

1. Open faucets furthest from tank and allow pump to op-
erate.

2. Air in the system will cause a sputtering flow; allow
faucets to run until you have a steady, air free stream.

3. Open and close faucets repeatedly until you are sure all
air has been removed.

4. If stream does not become steady, air may be leaking into
the system; check for leaks in the piping on the suction
side of the pump.

NOTICE: To prevent waterlogging, check tank air charge
annually.

To Check Tank Air Charge

If drawdown (amount of water available per cycle) de-
creases significantly, check as follows:

1. To check air charge in tank, shut off electric power to
pump, open faucet near tank, and drain completely.

2. At the air valve in top of tank, check air pressure with
standard tire gauge. Air pressure should be the same as
pump pressure switch cut-in setting (40 PSI).

3. If the air pressure is below 40 PSI, add air to the tank.
Use an air compressor or a portable air storage tank.

4. Use soap or liquid detergent to check for air leaks around
air valve. Continuous bubbling indicates a leak. If neces-
sary, install new core in air valve. This is the same as

those used for automobile tubeless tires.

1 2 3

1. Tank nearly empty - air expands Filling area above

vinyl separator.

2. Water begins to enter tank - air is compressed above
separator as it fills with water.

3. Pump-up cycle completed - air now compressed to

Figure 3

4 5

cut off setting of pressure switch.

4. Water being drawn from tank - compressed tank air

forces water out of separator.

5. Separator completely empty - new cycle ready to
begin.