Craftsman 390.253251 User manual

SEARS
OWNER'S
MANUAL
MODELNO.
390.253251
CAUTION:
Readand Follow
All Safety Rulesand
Operating Instructions
BeforeFirstUseof
ThisProduct.
Save ThisManual For
FutureReference.
CRRFTSMRN°
MULTI-STAGE JET PUMP
•Safety Instructior_
• Installation
•Electrical
•Operation
• Maintenance
• Repair Parts
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
PRINTED IN U.S.A. Form No, F642-9807 (Rev. 716/98)

CONTENTS
INTRODUCTION/WARRANTY .................................. 2
MAJOR COMPONENTS .............................................. 3
PUMP PERFORMANCE ............................................... 4
INSTALLATION ........................................................ 5-8
ELECTRICAL .......................................................... 9-10
OPERATION ........................................................ 10-11
HELPFUL HINTS /MAINTENANCE ..................... 11-14
TROUBLESHOOTING GUIDE .................................. 15
REPAIR PARTS ..................................................... 16-19
INTRODUCTION
Please read our instructions before installing and using
your Deep Well Jet Pump. This will help you obtain the
full benefits of the quality and convenience built into
this equipment. It will also help you avoid any needless
service expense resulting from causes beyond our con-
trol which are not covered by our warranty.
RULES FOR SAFE INSTALLATION AND OPERATION
Carefully read and follow all safety instructions in this
manual or on pump
This is the safety alert symbol. When you see this
symbol 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 seri-
ous personal injury, death or major property damage if
ignored.
I'A_WARNINGIWarns about hazards that will or can
cause serious personal injury, death or major property
damage if ignored.
IA CAUTION ] Warns about hazards that will or can
cause ",_or_er_sona_l _iUry or property damage if ig-
nored.
The worcr'NOTICE - indicates special instructions
whick are.important but not related to hazards.
1. To avoid risk of serious bodily injury and property
damage, read safety instructions carefully before in-
stalling pump.
2. Follow local and/or national plumbing and electri-
cal codes when installing pump.
3. Keep well covered while installing pump to prevent
leaves and other debris from falling into well, con-
,taminating well and possibly damaging pump.
4. Protect pump and piping system from freezing.
Allowing pump or water system to freeze could
severely damage pump and voids warranty.
IAWARNING[ To 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 blowup; in-
stall relief valve capable of passing full pump vol-
ume at 100 PSI.
5. With a new well, test well for purity before use.
Consult local Health Department for procedure.
IAwARNING[Hazardous voltage. Can shock, burn,
cause death, or start fires.
6. Disconnect electrical power source before in-
stalling or working on pump.
7. Ground pump with a ground wire run from ground-
ing lug on motor to a grounded lead in the service
panel.
8. Line voltage and frequency of electrical power sup-
ply 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.
10. This pump is a deep well jet pump. It is not de-
signed or intended for shallow well use. Use in a
deep well (more than 25' depth to water).

MAJOR COMPONENTS AND WHAT THEY DO
Tank and Air Volume Control
The tank serves two functions:
1. It provides a reservoir of water. Some of this water
is drawn offwhenever a house fixture is opened (so
that the pump doesn't need to start every time you
open a tap).
2. It maintains a cushion of air under pressure.
A standard tank requires an Air Volume Control
(AVLO to add air to the tank when needed. See the
instructions included with the AVC for details of in-
stallation and operation.
A Captive _tank maintains a constant precharge of
air in the tank and does not require an AVC. An annual
check on the tank pre-charge pressure is recom-
mended.
Impeller
The pump's impeller rotates wit_ the motor shaft,
causing the water to fly-__md_y centrifugal
force. The rotation of the impeller, along with the mo-
tion of the water, creates a vacuum at the center of the
impeller (the "eye" of the impeller) which pulls in
more water.
The Vertical Multi-Stage O/MS) pump has two im-
pellers; the water feeds through them one after the
other, with each impeller adding to the pressure. This
allows the VMS jet pump to pull water from greater
depths and at a higher pressure than a conventional sin-
gle stage jet pumps.
Jet
The jet is a nozzle/venturi arrangement installed in the
well which drives water up to the pump from the well,
boosting the water pressure going into the impellers.
The jet allows water to be lifted from a greater depth
than would be possible with only the impeller eye's
vacuum. In order to drive the jet, part of the discharge
stream from the pump is diverted back _down the
hole" to the jet to help lift water from the well into the
pump suction.
Pressure Regulator
The pressure regulator is adjusted at installation to di-
vert the correct amount ofwater back to the jet for the
most efficient operation. Under certain conditions, the
pressure regulator may require adjustment during the
pump's life (see Page 10) to restore or maintain the
pump's efficiency.
Pressure Switch
The pressure switch automatically starts the pump
when the pressure in the tank drops to 40 pounds per
square inch (PSI) and stops the pump when the tank
pressure reaches 60 PSI.
Adapter Flange
The VMS pump is equipped with an adapter flange.
This adapter facilitates installation and removal of the
pump without disturbing piping. See Pages 6 and 7for
more information.
Pressure Relief Valve
Under certain conditions, VMS pumps can generate
very high pressure. The pressure relief valve is installed
to make sure that the pressure in the system does not
exceed the pressure which the system can carry safely.
The pressure relief valve must be able to pass all the
water the pump can produce at the system's rated pres-
sure. Install a relief valve (Sears Stock No. 27229) set
to open at 75 PSI. between the pump and the tank.
There should be no shutoff valves between the pump
and the relief valve. See Figures 11 and 12, Page 8, for
more information.
Pump Mounting
The pump base has three equally spaced 3/4" NPT
threaded sockets. These will take threaded pipe for
legs, to allow enough room to make piping connec-
tions under the pump.
In the case of a single pipe installation (see below), the
pump can be placed directly over the well, using the
offset nipple furnished with the casing adapter to con-
nect the pump to the well head.
Piping
When installed on a'double pipe' jet, one pipe is the
pressure or drive pipe; this pipe sends water down into
the well to the jet. The other pipe is the suction pipe;
this pipe carries water up to the pump suction from
the jet. Because of the pressure requirements and
depth of multi-stage jet pump installations, use the
chart below for pipe selection.
When installed on a singe pipe jet, the well casing
serves as the drive pipe, carrying water to the jet. The
drop pipe inside the well is the suction pipe, carrying
water up to the pump from the jet.
Use a'single pipe' system for a 2" or 3" well; use a'dou-
ble pipe' system for a 4_or larger well. See Pages 6 and
7for details. Follow instructions packed with jet pack-
age to get proper nozzle and venturi combination for
your pumping depth.
Use 1-1/4" pipe for both suction and drive pipes. A 1"
nipple, a 1-1/4_xl" facing bushing, and a 1-1/4" cou-
pling are included in the jet package. These must be
used with the jet. (See Figure 8, Page 6, for installation
details.)
3

PUMP PERFORMANCE
Multi-Stage Pump
Pump Performance (in gallons per minute)
Pump
Stock
No.
390.253251
1HP
Jet Discharge
Pkg. Pressure
No. P.S.I.
4O
29670* 60
4O
29902"*t 60
29660*** 40
60
40 60 70 80
11.3 10.0 8.8 7.6
10.6 8.6 7.5 6.5
11.7 11.1 10.2 9.2
11.0 9.5 8.6 7.8
11.7 11.1 10.2 9.2
11.0 9.5 8.6 7.8
Pumping Depth In Feet
1_ 110 120 140 1_ 1_ 210
6.5 5.0 5.0 5.0 4.2 3.5 2.0
5.5 4.8 4.8 4.7 3.9 2.7 1.5
7.8 6.4 5.1 5.0 4.5 4.0 3.2 2.1
6.6 5.4 4.7 4.6 4.2 3.4 2.6 1.7
7.8 6.4 5.1 5.0 4.5 4.0 3.2 2.1
6.6 5.4 4.7 4.6 4.2 3.4 2.6 1.7
Use 160 PSI Min. Rating Plastic Pipe.
* Jet Package No. 29670 - 2" Single Pipe (use 1-1/4" galvanized pipe).
** Jet Package No. 29902 - 3" S_ingle Pipe (use 1-1/4" galvanized pipe).
*** Jet Package No. :59__ Pipe.
1 Must be ordered through Sears Product Service, 1-800-366-7278.
4

INSTALLATION
Use New Pipe for Best Results.
Clean Rowl
1O960697
From
Well
Figure I - No Dirt or Scale in Suction Pipe
1100 0697
Figure 2 - Foot Valve Must Work Freely
If Air Pockets Fon'n, Water Won't Flow.
Keep Pipe Straight and Angled up to Pump.
1t01 _1_7
Figure 3 - No Air Pockets in Suction Pipe
Pipe Joint
No Air Leaks Compound Will
in Suction Pipe. _Plastic.
IfAir Flows
WaterWon't
!1:T
,hltl Deep well ismore
than 25' (7.6M)
,tto water with
pump running.
Well _ 1
Casing_
Foot--._._
Valve_'I _I
Strainer_
Do not use on shallow wells!
(25 feet or less in depth)
Figure 5 - Use Pump On Deep Well Only
)
822b 0697
NOTICE: For proper performance, pump MUST be
matched to ejector and to well depth. Use this pump
on wells 25' to 210' deep.
1. Long runs and many fittings increase friction and re-
duce flow. Locate pump as close to well as possible:
use as few elbows and fittings as possible.
2. Be sure well is clear of sand. Sand will plug the
pump and void the warranty.
3. Protect pump and all piping from freezing. Freezing
will split pipe, damage pump and void the warranty.
Check locally for frost protection requirements
(usually pipe must by 12" below frost line and
pump must be insulated).
4. Be sure all pipes and foot valve are clean and in
good shape.
5. No air pockets in suction pipe.
6. No leaks in suction pipe. Use Teflon tape or Plasto-
Joint Stik to seal pipe joints.
7. Match pump to well.
IMPORTANT: Flow into well must at least equal
flow out through pump!
8. Unions installed near pump and well will aid in ser-
vicing. Leave room to use wrenches.
IA CAUTION IMotor normally operates at high temper-
ature and will be too hot to touch. It is protected from
heat damage during operation by an automatic internal
cutoff switch. Before handling pump or motor, stop
motor and allow it to cool for 20 minutes.
Use Teflon Tape.
!:igure 4 - Suction Pipe Must Not Leak
1102 0697

DEEP WELL INSTALLATION FOR DOUBLE PIPE
Priming
Tee and Gasket
Seal Coupling
-- 1" Plastic Drive Pipe
-- 1-1/4" Plastic Suction Pipe
Plastic Pipe
Adapter. (Supplied with Ejector)
-- 1" Plastic Pipe Adapter
-- Ejector Assembly
Figure 6 - Offset Installation
Plastic Pipe Shown
IGasket
Drive Pipe
1461 0195
Figure 7 - Over the Well Installation
Steel Pipe Shown
Suction: 1-1/4"
Drive: Pipe or Plastic
1-1/4" Pipe Pipe Adapter
orPipePlastic J
1-1/4"
Cou
1-1/4x1"
Face
Bushinc
1" Nipple
1386 1194
Figure 8 - Jet Assembly With
I" and I-I/4" Drive Pipes
Piping In The Deep Well
See Figures 6, 7, and 8.
NOTICE: Deep well installations are either single pipe
(2" wells) or double pipe (4" and larger wells). In a dou-
ble pipe installation, the larger pipe is the suction pipe
and the smaller pipe is the drive pipe (very deep wells
may use suction and drive pipes of the same diameter).
Plastic pipe is ideal for double pipe installations. Due
to its light weight, it is easy to handle and does not usu-
ally require a block and tackle for installation and re-
moval.
Double Pipe Installation - Plastic Pipe
NOTICE: Use Teflon tape on all male threads on plas-
tic pipe and fittings to prevent air leaks in suction pip-
ing.
1. Inspect ejector to make sure that nozzle and ven-
turi openings are dean and clear.
2. Inspect pipe for any foreign matter or obstructions.
NOTICE: Make sure that no foreign matter enters pipe
openings while installing pump.
3. Make sure foot valve operates freely: attach to ejec-
tor with a close nipple. Use Teflon tape on male
threads.
4. Install nozzle and venturi in deep well ejector.
5. Using Teflon tape on male threads, install special
plastic pipe adapter (supplied with ejector) by
screwing adapter into 1-1/4" tapped hole in ejector
body (see Figures 6 and 8, above).
6, Thread a 1" plastic pipe adapter or a 1" nipple into
the 1" tapped hole in ejector body (see Figure 8).
7. Install sufficient plastic pipe in well casing to place
ejector at the proper depth. (Your well driller
should supply this information.)
NOTICE: As aguide, the ejector should be set at least
10 to 20 feet below the lowest water level with pump
running, if possible, but always at least five feet from
the bottom of the well.
8. Tighten all hose clamps securely on plastic pipe.
Use two damps per joint to prevent air leaks into
suction pipe. Clamp screws should be on opposite
sides of the pipe. Fill pipes with water to make sure
that foot valve and connections do not leak.
9. Install sanitary well seal on top of well casing; use
steel nipple through well seal as shown in Figure 6.
NOTICE: Align locating lugs on adapter flange and
pump base so that pump discharge will be aligned with
piping.
10. Install 1" nipple in one side of adapter flange. Slide
threadiess coupling down over drive pipe from
well. Thread adapter flange onto suction pipe from
well and align nipple and drive pipe.
11. Slide threadless coupling up and secure nipple to
drive pipe.
12. Remove paper backing from adhesive gasket. Apply
gasket to adapter flange, making sure that holes line
up.
13. Align locating lugs on pump base with locating lugs
on adapter flange; attach pump to flange with cap
screws provided.

DEEP WELL INSTALLATION FOR SINGLE PIPE
Pump
mounted
on Casing
Adapter "%_
Pipe Clamp
serves as
Drive Pipe
Pipe
Water level
with pump
10 to 20 Feet
Ej
Cup
Leathers
,r
5 Feet
or more
Figure 9
14. See "Discharge Pipe Sizes" for information regard-
ing correct discharge pipe size.
Steel Piping
The special adapter nipple is not used with steel pip-
ing.
To more safely lower steel piping into the well, build a
tripod out of 2x4 lumber. A couple of pipe clamps can
also be made of 2x4s secured with 1/2" bolts (see
Figure lOB). Always install the coupling at the top end
of the pipe joint and install the pipe clamp below the
coupling. This will prevent accidentally dropping the
pipe into the well if the clamp slips. With steel pipe,
be sure all joints are clean and the ends reamed before
installing; use teflon tape or pipe joint compound at
each joint to prevent leakage.
Use a lever hoist (a "come-along") to lower pipe into
well (see Figure 10A). As each section of piping is low-
ered into the well, fill it with water. This will help
prime the system and also serves as a check on leaks
which may occur in the piping and foot valve as the
piping is assembled.
Single Pipe Ejector Installation
Single pipe installations require (see Figure 9):
Pipe Clamp.
L
Figure I0A - Use tripod and lever hoist to lower
pipe into the well
Figure 10B - Pipe clamp detail
a. Galvanized steel suction pipe.
b. Leather packer-type ejector with built-in foot
valve.
c. Turned couplings (supplied with packer-type
ejector).
d. Well casing adapter (supplied with packer-type
ejector).
1. Connect ejector to first length of pipe. Use pipe
joint compound sparingly on male threads.
2. Lower pipe into casing. Use special turned cou-
plings (included with single pipe ejector package)
to increase water flow. Use pipe joint compound
sparingly on male couplings threads.
Horizontal Offset Pipe Sizes
When the pump is set more than 25' to one side of the
well, increase the horizontal pipe size to reduce fric-
tion. Never use pipe smaller than the pump port size.
Pump Up to 25' 25' to 100' 100' to 300'
Model Suct. Drive Suct. Drive Suct. Drive
390.253251 1-1/4" 1-1/4" 1-1/'Z' 1-1/4" 2" 2"
NOTICE: Fill pipe with water as each length is added
to be sure foot valve and connections do not leak.
7

PRESSURE TANK CONNECTION
Air Volume Control lANK I To Service
Sears Stock No. 2761 _1 _"_
"(_ TANK
_._lb _ Pressure
y f_"-tax _, J Regulator
Pump to Tank Piping I1._. I_ (J_ _ J
1" Discharge --_ _"_- ,_j/j
Relief Valve Sears._-*_!_ r_ n_
Stock No. 27229 _. _j_-,_._
-_ _ _ j AVC Fitting
Air Volume Control Tubing/Fdti_ "_ _ __. ) Piping Tee and
Sears Stock No. 27881 WellSeal "_"_1, "1" Discharge t
•'To Service
2355b 0697rm 2358b 0697nc
Figure I I - Pump With Standard Tank
3. Add lengths of pipe until the ejector reaches the
proper depth. (Your well driller should supply this
information.)
NOTICE: As a guide, the ejector should be set at least
10 to 20 feet below the lowest water level with pump
running, if possible, but always at least 5 feet above the
bottom of the well (see Figure 9, Page 7).
4. -To properly seat the cup seals, after the ejector is
correctly positioned move the assembly up and
down slightly. Water pressure in the casing will then
soak the cup seals (see Figure 9). They should seal
in 2-3 hours after installation.
5. With ejector set, install well casing adapter. Remove
pipe holder. Align locating lugs and tighten adapter
to form seal with well casing.
"v,,,.Pressure
Regulator
Relief Valve
Figure 12 - Pump With Captive-Ai# Tank
Check Pressure with
Tire Gauge
Figure 13 - Checking Tank Pre-charge
Discharge Pipe Sizes
1. If increasing discharge pipe size, install reducer in
pump discharge port. Do not increase pipe size by
stages.
2. When the pump is set away from the points of
water use, the discharge pipe size should be in-
creased to reduce pressure losses caused by fric-
tion.
•Upto 100 ft run: 1"
• 100 ft. to 300 ft run: 1-1/4"
• 300 ft. to 600 ft run: 1-1/2".
Pressure Tank Installation - Deep Well
The Pressure Tank provides a reservoir of water under
pressure and maintains cushion of air pressure to pre-
vent pipe hammering and possible damage to plumb-
ing components. When water is drawn off through
house fixtures, the pressure in the tank is lowered and
the pressure switch starts the pump.
Standard Tank Connection
When a standard tank is used, an air volume control
(AVC) adds air to the tank when it is needed. See Figure
11 for typical standard tank installation. To connect
AVC to pump, thread a 1/8 _ compression fitting into
tapped hole on the front of the pump. Cut tubing to
length to reach AVC; assemble to fitting on pump and
to AVC on tank. See installation instructions provided
with tank and AVC for details.
Precharged Tank Connection
When a precharged tank is used, no AVC is necessary.
See Figure 12 for typical precharged tank installation.
A precharged tank contains a factory provided air
charge.
NOTICE: Your pump pressure switch is set for a 40-60
PSI range and requires a tank pre-charge of 40 PSI for
proper operation (see Figure 13). See tank owner's air
charge. An annual check on tank charge is recom-
mended.
8

ELECTRICAL
Disconnect power before working on pump, motor, pressure switch, or wiring.
Your Motor Terminal Board (under the motor end cover) ff line voltage is 230 Volts or if you have a single voltage
and Pressure Switch look like one of those shown below, motor. Connect power supply as shown for your type of
Convert to 115 Volts as shown. Do not change motor wiring switch and your supply voltage.
230 Volt to 115 Volt Conversion, Plug-in Type:
1. Pullplug 2. Plug in again
straight with arrow
outfrom on plug
terminal pointingto
board; '115 Volts'.
1. 2.
1.Move blackwire 2. Move whitewire
fromAto L1. withblacktracer
fromB to A.
230 Voltto 115 Volt Conversion,Spade ConnectorType:
3. Change Complete:
_GroundScrew
- Motor wires connecthere.
-- Power supply wires connecthere.
230 Volt: Connect2 hotwires (blackand red1
hereand cap thewhite (neutral)wire. Itdoes
notmatter whichwire goesto whichscrew.
115 Volt: Connectone hot wire (blackor red)
to one of thesescrews (it doesnl matter
whichone). Connectthe white (neutral)wire
tothe otherscrew.Cap any remaining
blackor red wires.
Clamp the power cableto prevent strain
on the terminal screws.
Connect the green (or bare copper) ground wire
tothe green ground screw.
Motor wires connect here.
supply wires connect here.
230 Volt: Connect 2 hot wires (black and red)
here and cap the white (neutral) wire. It does
not matter which wire goes to which screw.
115 Volt: Connect one hot wire (black or red)
to one of these screws (it doesn't matter
which one). Connect the white (neutral) wire
to the other screw. Cap any remaining
black or red wires.
)the powercable to preventstrain
onthe terminalscrews.
green (or bare copper) groundwire
to thegreen groundscrew. 31870398
Figure 14 - Motor wiring connections through Pressure Switch. Match motor voltage to line voltage.
IAWARNINGIHazardous voltage. Can shock, burn,
or kill. Connect ground wire before connecting
power supply wires. Use the wire size (induding
the ground wire) specified in the wiring chart. If
possible, connect the pump to a separate branch cir-
cuit with no other appliances on it.
JAWARNING JExplosion hazard. Do not ground to
a gas supply line.
Wiring Connections
IAWARNINGJFire hazard. Incorrect voltage can cause
afire or seriously damage the motor and voids the war-
ranty. The supply voltage must be within ±10% of the
motor nameplate voltage.
NOTICE: Dual-voltage motors are factory wired for
230 volts. If necessary, reconnect the motor for 115
volts, as shown. Do not alter the wiring in single volt-
age motors.
Install, ground, wire, and maintain your pump in com-
pliance with the National Electrical Code (NEC) or the
Canadian Electrical Code (CEC), as applicable, and
with all local codes and ordinances that apply. Consult
your local building inspector for code information.
Connection Procedure
1. Connect the ground wire first as shown in Figure 14.
The ground wire must be a solid copper wire at least
as large as the power supply wires.
.There must be a solid metal connection between the
pressure switch and the motor for motor grounding
protection. If the pressure switch is not connected
to the motor, connect the green ground screw in the
switch to the green ground screw under the motor
end cover. Use a solid copper wire at least as large
as the power supply wires.
.Connect the ground wire to a grounded lead in a ser-
vice panel, to a metal underground water pipe, to a
metal well casing at least ten feet (3M) long, or to a
ground electrode provided by the power company
or the hydro authority.
4. Connect the power supply wires to the pressure
switch as shown in Figure 14.
9

ELECTRICAL /OPERATION
WIRING CHART - Recommended Wire and Fuse Sizes
MOTOR
HP
1
VOLTS
115/230
MAX. LOAD BRANCH FUSE*
AMPS RATING (AMPS)
19.2/9.6 25/I 5
DISTANCE IN FEET FROM MOTOR TO METER
0to50 51 to 100 101to200 I201 to300
10/14 10/12 8/10 I6/10
(*)Timedelayfuse or circuitbreakersare recommendedin any motor circuit.
Priming The Pump
]_,WARNING[Burn hazard. NEVER run pump dry.
Running pump without water may cause pump
to overheat, damaging seal and possibly causing
burns to persons handling pump. Fill pump with
water before starting.
{AWARNINGIRisk of explosion and steam burns.
NEVER run pump with discharge shut off, which
can boil water inside pump body. Steam in pump
may cause it to expkglr.,g__yone near.
NOTICE: Open water system faucets before priming
pump for the first time.
1. Remove pressure gauge.
a. Close regulator valve (turn clockwise -see Figure
15A).
b. Fill pump and suction pipe with water (Figure
15B).
c. Replace pressure gauge, using Teflon tape on
thread; tighten gauge.
NOTICE: If a priming tee and plug have been installed
for a long horizontal run, be sure to fill suction pipe
through this tee and replace plug. (Don't forget to
teflon tape the plug.)
2. Start Pump:
Pressure should increase rapidly to 50 pounds per
square inch or more as ejector and pump prime. If
so, go to step 4, below.
If pressure does not build to 50 PSI, repeat steps a,
b, and c under Step No.1 two or three times to re-
move entrapped air from the suction pipes.
3. If pressure does not build up after priming pump
several times, check the following:
a. Suction pipe in the water.
b. Suction pipe has no leaks.
NOTICE: Air can leak in even where water won't leak
out. Make sure all joints are tight.
c. Control valve, check valve, or foot valve installed
and operating correctly.
d. Pump trying to lift water more than rated lift for
deep well ejector used (including compensation
for horizontal offset).
e. Be sure pump is not airlocked. In offset install-
ations, pump suction port should be highest
point in suction pipe; there should be no sags in
suction pipe (run it straight and at a slight angle
upward from well head to pump).
4. Once unit has primed and pressure stabilized,
slowly open (turn counterclockwise- Figure 16A,
regulator valve until pressure falters (pressure
gauge needle flutters; pump may become noisy -see
Figure 16B). At this point, close (turn clockwise)
regulator valve slightly until pressure stabilizes. This
setting provides maximum flow (Figure 16C).
5. Pump may draw well down far enough at this point
to lose its prime. If so, close regulator valve until
pressure is stable throughout pumping cycle. Close
faucets and allow pump to pressurize tank and shut
off.
.Check system by alternately opening and closing
faucets in the system. With faucets open, pressure
will drop until pump starts; with faucets closed,
pressure will build up until pump shuts off.
A - Close Regulator mB - Fill Pump With Water
I_igure 15 - Priming Pump
C - Start Pump _D - Adjust Regulator
10