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INSTALLATION
THE SUMP
The sump should
be located
at the lowest
place in the base-
ment or area to be drained.
Floor drains
from other
areas in
the basement
may be tiled into the sump.
Drain tile around
a house
foundation
can also be tiled into the sump,
effec-
tively removing
water and relieving
pressure
from tiffs area.
A suitable
sump can be a 20" or 24" (500-610ram)
sewer
tile.
The minimum
size is 12" (305ram)
in diameter
for Models
390.304551
and
390.304611;
10"
(254mm)
for
Model
390.304691.
A sump cover is desirable
to exclude
refuse
from the sump.
Consult
local code for sump
cover
specifications.
NOTICE:
Periodically
inspect
pump,
system
comporlents,
and sump for debris
and foreign
objects.
Keep sump
free of
all refuse. Perform routine
maintenance
as required.
PUMP INSTALLATION
Set the pump
on the bottom
of the sump,
making
sure that
is sits solidly
and is level.
Be sure
there
is enough
space
around
the pump
to allow the switch
free movement
as the
sump water level changes.
Pump should
not be installed
on
clay, earth,
or sand surfaces.
[A CAUTION]Risk of flooding.
If a flexible
discharge
hose
is used, pump
may move around
in sump when
motor
starts.
If it moves far enough
so that the switch
hits the side of the
sump,
the switch
may stick and prevent
pump from starting.
Make
sure
that pump
is secured
so that
it cannot
walk
around
in s ump.
Hose Kit No. 27909
includes
1-1/4" flexible
plastic
pipe for
the discharge
pipe. Run discharge
pipe to the nearest
sewer
outlet
or other
point
of disposal.
Use the most direct
route
and the fewest
turns and elbows
possible.
Make sure
that
pump
cannot
move around
in sump pit.
Use teflon tape to seal threads in plastic
pipe. Hand tighten
only.
NOTE: To avoid backflow into sump when pump shuts off,
install a SEARS Check Valve, Stock No. 2789, in threaded dis-
charge
port
of pump.
Be sure arrow
on check
valve body
points
away
from
the pump.
This
Sears
check
valve
is
equipped
with an air bleed hole to prevent
airlocking
pump.
If using any other
check
valve,
drill 1/8" (3.2ram)
hole in
dishcharge
pipe
just above
pump
body
but below
check
valve to prevent
air locks.
L:.:.
--
;"" ""
": " " "'""
'°'°ram'
l <5...
....,.'._'
(500 to 610mini
FIGURE
I
FLOAT
SWITCH
INSTALLATION
AND OPERATION
(Models 390.304551
and 390.304611;
For Model 390.304691,
see Page 7)
The automatic
float switch
is factory mounted
on the pump
and preset
for a pumping
range of approximately
7". Tether
length
is factory
preset
at 3-1/2" (89ram)
(see Figure
3). Do
not change
tether length.
Be sure automatic
float can swing
freely through
its entire
arc without
interference
from
pump,
piping,
sump
wall or
any other
object.
When
sump
is dry, the watertight
automatic
float switch
is
hanging
in a downward
position
and the pump
is off.
As water
comes
into the sump,
the automatic
float switch
rises to an upward
position
and the pump starts.
,
Water
will continue
to be pumped
until the float switch
is
hanging
in the downward
position
again, v-hen
pump
will
stop.
I _xWARNING 1Risk of electric
shock.
Before
installation,
check
your local electrical
codes.
To avoid personal
injury
when
servicing
your pump,
be sure that the power
is dis-
connected
from both the pump
and the float switch.
To check
operation,
fill sump
with water
and observe
oper-
ation through
one complete
cycle.
Grounded
lectrical
Outlet
Auto
Float
Switc
\
Make
sure
pump cannot
move
m sump
Foundation
Footing
Drain
Check
Valve
1472 0195
FIGURE
2 - Models
390.304551
and
390.30461
I
._,.__ 31/2"__._
(SSmm)
FIGURE
3 - Tether
Length
DO
NOT
ALLOW
PUMP
TO RUN
DRY
Pump should
not be allowed
to run dry prior to shutting
off.
To do so voids the warranty
and could ruin the pump.
3
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