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Craftsman 390.253251 Owner's Manual page 10

Multi-stage jet pump

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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
I 201 to300
10/14
10/12
8/10
I
6/10
(*)Time delayfuse or circuitbreakers are 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
m
B - Fill Pump With
Water
I_igure 15 - Priming
Pump
C - Start
Pump _
D - Adjust Regulator
10

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