Sears CRAFTSMAN 390.304790, Owner'S Manual

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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 this area.
A suitable sump can be a 20" or 24" (500-610mm) sewer tile.
The minimum size is 10” (254mm).
A sump cover is desirable to exclude refuse from the sump.
Consult local code for sump cover specifications.
NOTICE: Periodically inspect pump, system components,
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.
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 sump.
Hose Kit No. 27909 includes 1-1/4" flexible plastic pipe for
the discharge pipe. Thread 1-1/2”x1-1/4” reducer bushing
into pump discharge; thread hose into bushing. Run dis-
charge pipe to the nearest sewer outlet or other point of dis-
posal. 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” (3.2mm) hole in
dishcharge pipe just above pump body but below check
valve to prevent air locks.
Risk 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.
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
Sewer Tile
Concrete
Sewer Tile
Sump Cover
Basement Floor
1/4" (6mm)
24" Min.
(610mm)
20" to 24"
(500 to 610mm)
20" to 24" Diam.
(500 to 610mm)
FIGURE 1
Foundation
Footing
Drain
Check
Valve
Vertical
Mechanical
Switch
Grounded
Electrical
Outlet
Make sure
pump cannot
move in sump
3133 1297
Reducer
Bushing
FIGURE 2 – Typical Installation