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Craftsman 390.252158 Owner's Manual page 5

Professional 1/2 hp shallow well water system
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INSTALLATION
1-1/4"
1-1/2"
2"
Upto
25 Ft.
25 to 50 Ft.
50 to 200 Ft.
Discharge
Pipe Sizes
When
the pump
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 100 Ft.
100 to 600 Ft.
"rank
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
flair charge
needs
adjustment.
Tank
pre-charge
should
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 PSI).
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
L-/
X...J
L.J
L.J
k--t
X._/
3
4
5
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
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.
Figure 3
Motor
Horsepower
1/2
ELECTRICAL
Table II Wiring
Chart
- Recommended
Wire and Fuse Sizes
Volts
115/230
Max. Load
Amps.
8.8/4.4
Branch
Fuse*
Rating Amps
15/15
Distancein
FeetfromMotortoMeter
0'to
101'to
201'to
301'to
401'to
100'
200'
300'
400'
500'
Wire Size
1_14
1_14
1_14
_14
_12

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